JPH09311267A - Optical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly accurately correct the deviation of an image-forming position caused by an environmental change by driving and controlling a movable lens group by a lens driving means when an automatic focusing function is stopped. SOLUTION: A controlling means 7 obtains the driving amount of a fourth lens group(RR) 104 which is the movable lens group based on a focusing signal from an automatic focusing means 16 and outputs a driving control signal to a driver 11. Then, the driver 11 drives the lens driving means 9 based on the driving control signal from the controlling means 7 and moves the RR 104 in the direction of an optical axis, so that the automatic focusing of the lens group RR 104 is performed. When the operation (function) of the automatic focusing means 16 is stopped (OFF) by an automatic focusing controlling means 17, the environmental temperature of an optical system 1 is detected by a detecting means 12 and is stored, and in the case that the environmental temperature is changed thereafter, the fluctuation of the image-forming plane position of the optical system 1 caused by the change of the environmental temperature is corrected by moving the RR 104 to a focusing position by using the function of the automatic focusing means 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device such as a video camera, a silver halide camera, or an electronic still camera, and more particularly to an optical system having a movable lens group that moves on the optical axis during focusing or zooming. (Photographing optical system), for example, in an optical system such as a photographing lens or a zoom lens having a single focal length, a focus shift (image plane shift) caused by an environmental change is corrected by moving the moving lens group. The optical device.

[0002]

2. Description of the Related Art In recent years, in optical devices such as cameras,
The miniaturization of the photographing optical system and the miniaturization of the image size of the solid-state imaging device are rapidly progressing. In addition, plastic materials are often used as optical materials constituting the photographing optical system.

The use of a plastic material as an optical material has many advantages such that a lens can be easily molded by a mold, its shape is highly arbitrary, and its cost advantage is greater than that of a glass material. For this reason, lenses made of plastic materials are often used in finder systems, infrared active autofocus units, and part of photographing optical systems.

However, the plastic material undergoes a greater change in physical properties due to environmental changes than the inorganic glass material. For example, the linear expansion coefficient is large, and the typical value of PMMA, which is a plastic material, is 67.9 × 10 ⁻⁶ / ° C., whereas LaK 14 (made by OHARA), which is an inorganic glass, is used.
Is 57 × 10 ^-7 / ° C, which is one digit smaller. Regarding the change in refractive index with respect to temperature change, PMMA has a typical value of 1.0 to 1.2 × 10 ⁻⁴ / ° C., whereas the above L
For aK14, the value of D line is 3.9 to 4.4 × 10 ⁻⁶ / ° C., which is two orders of magnitude smaller.

As described above, the plastic material has a greater change in optical constants (refractive index, shape, etc.) with respect to temperature change than the inorganic glass material. For example, a lens made of a plastic material, that is, a so-called plastic lens, has a focal length largely changed with respect to a temperature change as compared with a lens made of an inorganic glass material.

Further, the plastic material has a higher water absorption rate than the inorganic glass material. For this reason, the optical constants of the plastic lens change greatly with respect to changes in humidity as well as changes in temperature as compared with lenses made of an inorganic glass material.

Thus, when a plastic lens is used as part of the optical system, it has many advantages as described above, but on the other hand, a lens made of an inorganic glass material is used against environmental changes, particularly temperature and humidity changes. As compared with the case, there is a problem in optical performance that the optical properties such as the focal length change significantly.

[0008]

By the way, recent optical devices include a downsizing of a photographing optical system, a downsizing of a solid-state imaging device,
The size is reduced by increasing the density of each component. Therefore, there is a problem that the planned image forming surface position (design image forming surface position) of the image forming surface of the optical system used in the optical device is largely displaced due to environmental changes such as temperature change and humidity change. A major issue is how to effectively correct the deviation of the image forming position due to such environmental changes.

Further, many recent optical devices have an automatic focusing function (AF function) for automatically detecting the focusing position of the optical system. For optical devices with AF function, A
When some obstacles such as cars and pedestrians come in between the subject and the subject while the F function is operating to shoot the subject, the AF function works and the obstacle is detected. Since the object is focused, the object image of the subject to be photographed is formed on the image forming surface in a state of being out of focus (image forming surface deviation).

Therefore, in order to avoid such an out-of-focus shooting, the AF function is often stopped to shoot. In this case, since the focus is fixed and the subject is photographed without activating the AF function, in the optical device including the plastic lens in the optical system as described above, the image plane position largely changes due to the environmental change as described above, There arises a new problem that the object image of the subject is formed in a state of being out of focus (image plane deviation).

According to the present invention, when an automatic focusing function is operated by using an optical system (photographing lens) having a movable lens group that moves on the optical axis for focusing and zooming and photographing,
If the operation of the automatic focusing function is stopped for some reason and there is an environmental change such as temperature change or humidity change, whether to drive and control the moving lens group using the automatic focusing function,
Alternatively, by appropriately determining the movement of the moving lens group each time and controlling the movement of the moving lens group, a video camera capable of correcting a focus shift caused by an environmental change and maintaining high optical performance, An object is to provide an optical device suitable for a silver salt camera, an electronic still camera, or the like.

[0012]

The present invention employs the following means in order to solve the above problems. That is, in the optical device of the present invention, firstly, [1]: an optical device that forms an object image on an image plane by an optical system including a moving lens group, a lens that drives the moving lens group. Driving means, control means for controlling this lens driving means, detection means for detecting temperature information and / or humidity information about the optical system, and driving a lens by generating a focusing signal based on a signal of a focusing state of the optical system. An automatic focusing means for focusing the moving lens group by means, and an automatic focusing control means for controlling the operation of the automatic focusing means,
The control means utilizes the function of the automatic focusing means based on the output signal from the detecting means while the operation of the automatic focusing means is stopped by the automatic focusing control means. It is characterized in that the position of the image plane is corrected by controlling the driving means.

In particular, in the optical device of [1] above, [1-2]: the optical device manually controls the lens driving means through the control means to adjust the focus of the movable lens group. Adjusting means, the control means,
Based on the output signal from the detection means when the operation of the movable lens group by the manual focus adjustment means is stopped while the operation of the automatic focus control means is stopped by the automatic focus control means. The position of the image plane is corrected by controlling the lens driving means using the function of the automatic focusing means. [1-3]: It has a manual focus adjusting means for driving and controlling the lens driving means to adjust the focus of the movable lens group, and the control means,
When the operation of the movable lens group by the manual focus adjusting means is completed while the operation of the automatic focusing means is stopped by the automatic focusing control means, the automatic focusing is performed based on the output signal from the detecting means. It is characterized in that the position of the image plane is corrected by controlling the lens driving means using the function of the focusing means.

In addition, the above [1], [1-2] or [1]
-3] In the optical device [1-4], the control means determines whether or not the detection value obtained after the detection value has changed with reference to the detection value in the output signal from the detection means. When the detected value obtained after that has changed, the position of the image plane is corrected by controlling the lens driving means by utilizing the function of the automatic focusing means. .

In the above optical device [1-4], [1-5]: the control means uses the detected value after being determined as a determination target in the previous determination after the determination is completed, as a reference. It is characterized in that it is determined whether or not the detection value obtained after the detection value has changed.

Secondly, in the optical apparatus of the present invention, [2]: In the optical apparatus for forming an object image on an image forming surface by an optical system including the moving lens group, the moving lens group is Lens driving means for driving, control means for controlling this lens driving means, storage means for storing control information for driving the movable lens group, detection means for detecting temperature information and / or humidity information regarding the optical system, An automatic focusing unit that generates a focusing signal based on a signal of the focusing state of the optical system and causes the lens driving unit to focus the moving lens group,
And an automatic focusing control means for controlling the operation of the automatic focusing means, wherein the control means detects the detecting means when the operation of the automatic focusing means is stopped by the automatic focusing control means. The position of the image plane is corrected by controlling the lens driving means using the control information or the function of the automatic focusing means based on the output signal from the.

In particular, in the above-mentioned optical device [2], [2-2]: the optical device drives the lens driving means through the control means to drive and control the focus of the movable lens group. Adjusting means, the control means,
Based on the output signal from the detection means when the operation of the movable lens group by the manual focus adjustment means is stopped while the operation of the automatic focus control means is stopped by the automatic focus control means. Correcting the position of the image plane by controlling the lens driving means using the control information or the function of the automatic focusing means, [2-3]: the optical device includes the control means. Via manual control of the lens driving means to adjust the focus of the movable lens group by manual focus adjusting means, the control means,
When the operation of the movable lens group by the manual focus adjusting means is completed while the operation of the automatic focusing means is stopped by the automatic focusing control means, the control is performed based on the output signal from the detecting means. It is characterized in that the position of the image plane is corrected by controlling the lens driving means using information or the function of the automatic focusing means.

In addition, the above [2], [2-2] or [2]
[3-4] In the optical device [2-4], the control means sets a difference value obtained from the latest detection value in the output signal from the detection means and a preset reference value to a predetermined prescribed value. If the difference value does not exceed the specified value, the position of the image plane is corrected by controlling the lens driving means using the control information, and the difference value is When it exceeds the specified value, the position of the image plane is corrected by controlling the lens driving means by utilizing the function of the automatic focusing means.

In the above-mentioned optical device [2-4], [2-5]: the control means applies the latest detected value determined as the determination target in the previous determination after the determination is completed. When the detection value obtained after the latest detection value has changed, it is determined whether or not the difference value obtained from the detection value obtained after that and the reference value exceeds a predetermined specified value, and the difference If the value does not exceed the specified value, the position of the image plane is corrected by controlling the lens driving means using the control information, and if the difference value exceeds the specified value, the automatic It is characterized in that the position of the image plane is corrected by controlling the lens driving means using the function of the focusing means.

Further, the above [2], [2-2] or [2-]
[2-6] In the optical device according to [3], the control information corrects the position data of the movable lens group at the reference temperature and / or the reference humidity and the position data based on the output signal from the detection means. The control means includes a plurality of temperature correction coefficient data and / or humidity correction coefficient data, and the control means controls the lens drive means according to the temperature or / and humidity detected by the detection means. It is characterized in that the temperature correction position data and / or the humidity correction position data of the movable lens group is calculated based on the control information extracted from the storage means.

In the above-mentioned [2-6] optical apparatus, [2-6-2]: the temperature correction position data is defined as a function of a difference value between the temperature detected by the detection means and the reference temperature. [2-6-3]: The humidity correction position data is defined as a function of a difference value between the humidity detected by the detection means and the reference humidity, [2-6-4] ]: The temperature correction position data is obtained by multiplying the difference value between the temperature detected by the detection means and the reference temperature by the temperature correction coefficient data, [2-6-5]: The humidity correction The position data is obtained by multiplying the difference value between the humidity detected by the detecting means and the reference humidity by the humidity correction coefficient data. [2-6-6]: The temperature correction coefficient data is changed. Moving lens group for double It is defined as a function of location, [2-6-7]: the humidity correction factor data is in that it is defined as a function of the position of the movable lens group for zooming, and characterized.

[1], [1-2], [1-]
3], [2], [2-2] or [2-3], [3]: The optical device forms an object image on an imaging plane by an optical system including a moving lens group. It is characterized by being a video camera.

[1], [1-2], [1-]
[3], [2], [2-2], [2-3] or [3], [4]: The optical system is a rear focus type zoom lens.

Further, the above [1], [1-2], [1-
3], [2], [2-2], [2-3], [3] or [4], [5]: the optical system has a plurality of lens groups, The lens group (1) is characterized in that at least a part thereof has a plastic lens.

Then, the above [1], [1-2], [1-
[3], [2], [2-2] or [2-3], [6]: the detection means has at least one sensor using a temperature sensitive resistor, [6-2] : The detecting means has at least one sensor using a thermistor, [6-3]: The detecting means has at least one sensor using a capacitance type sensor, and the like.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings. In the accompanying drawings, FIG. 1 and FIG. 2 are schematic views of a main part of an optical device according to a first embodiment of the present invention and a flow chart of the operation, and FIGS. 3 and 4 are main views of a second embodiment of the optical device according to the present invention. 5 and 6 are schematic diagrams and flow charts of main parts of the third embodiment of the optical device of the present invention, and FIGS. 7 and 8 are fourth embodiment of the optical device of the present invention, respectively. FIG. 9 and FIG. 10 are schematic diagrams and an operational flowchart of an essential part of an optical device according to the fifth embodiment of the present invention, and FIG. 11 and FIG. 12 are optical devices of the present invention. It is a principal part schematic diagram and operation flow chart of a 6th embodiment.

[First Embodiment] In FIG. 1, reference numeral 1 denotes an optical system (imaging system), which is a so-called four-group rear focus zoom lens (hereinafter referred to as an RFZ lens) including four lens groups described later. ).

The RFZ lens 1 includes a first lens group (hereinafter also referred to as a front lens) 10 which is a fixed lens group.
1. A second lens group (hereinafter also referred to as a variator lens) 102 having a variable power (zoom) function which is a movable lens group, and a third lens group (hereinafter referred to as an afocal lens) which is a fixed lens group. Sometimes referred to as) 103,
Then, a fourth lens group (hereinafter, also referred to as RR) 10 having a function as a compensator that corrects an image plane variation due to focus and zooming which is a moving lens group 10
Consists of four.

Each of the lens groups 101, 102, 103,
104 is actually composed of a plurality of lenses,
For example, in the first embodiment, the front lens 101 is set to 3
The lens configuration has a four-group, nine-lens structure including three elements, three variator lenses 102, one afocal lens 103, and two RRs 104.

In the first embodiment, a plastic lens made of a plastic material is used for at least one of the lens groups 101, 102, 103 and 104. This plastic lens can be made of, for example, a synthetic resin material such as acrylic, polyolefin, or polycarbonate.

In the first embodiment, the place where the plastic lens is used in each lens group is not particularly limited, and the plastic lens may not be used in a specific lens group at all. In the figure, 2 is a photoelectric conversion element (imaging unit) such as a CCD, and 3 is a diaphragm member for adjusting the amount of light incident on the photoelectric conversion element 2. Reference numeral 6 denotes a diaphragm driving means, which comprises an iG meter, a stepping motor, or the like, and drives a diaphragm blade (not shown) in the diaphragm member 3 substantially perpendicular to the optical axis based on a signal from the control means 7. The photoelectric conversion element 2 is configured by changing the area of the opening 3
The amount of light incident on is made constant. A diaphragm position detecting means 4 detects the aperture diameter of the diaphragm member 3. Reference numeral 5 denotes a detection circuit that converts the detection signal from the diaphragm position detection means 4 into a signal that can be processed by the control means 7 and outputs the signal to the control means 7. The control means 7 is for controlling the entire optical equipment, and a storage section (storage means) (not shown) that stores in advance control information for controlling the driving of the lens driving means 8, 9 described later and the below-mentioned storage means. Including an automatic focusing means 16 for
It is configured by PU and the like.

Reference numerals 8 and 9 denote lens driving means such as a stepping motor for driving the movable lens groups 102 and 104,
Reference numerals 10 and 11 are drivers for driving the lens driving means 8 and 9. Reference numeral 12 is a detection means for detecting the temperature and the like of the optical system 1. As the detection means 12, a temperature sensor such as a thermistor or a temperature sensitive resistor can be used. A detection circuit 13 converts a detection signal from the detection means 12 into a signal that can be processed by the control means 7 and outputs the signal to the control means 7. When detecting the humidity, the detecting means 12 may be a capacitance type sensor or a humidity sensor such as a thermistor.

Reference numeral 14 is an amplifier for amplifying the output of the photoelectric conversion element 2, 15 is a process circuit for converting the signal from the amplifier 14 into a signal such as an NTSC video signal, and 16 is an automatic focusing from the signal output of the process circuit 15 , AF) to generate an in-focus signal for controlling the RR 104 having a function as a compensator by the control means 7 to perform an AF operation, and 17 is an automatic focus control means for the AF of the automatic focus means 16. It consists of a switch that turns the operation on and off. Incidentally, in the AF method, a so-called hill-climbing method or the like, for example, a method proposed in JP-A-62-103616 can be used.

In the first embodiment, the control means 7 determines the drive amount of the RR 104 based on the focus signal from the automatic focus means 16 and outputs the drive control signal to the driver 11. Then, the driver 11 drives the lens drive means 9 based on the drive control signal from the control means 7 to move the RR 104 in the optical axis direction to perform automatic focusing of the RR 104.

Further, in the optical system 1 of the first embodiment, since the plastic lens is used for at least one lens group as described above, temperature change and humidity change around the plastic lens due to environmental changes. Occurs, the shape of the plastic lens changes as described above, or the refractive index changes because the temperature coefficient of the refractive index of the material is large, the focal length changes greatly, and the total focal length of the optical system 1 also changes. It will inevitably change. Therefore, if shooting is performed with the focus fixed without operating the AF function, the image plane position at the reference temperature (for example, 20 ° C.) shifts due to the environmental change, so-called focus shift occurs, and the subject becomes clear. The optical performance as an optical device for taking a picture is impaired.

Therefore, in order to eliminate the focus shift due to the environmental change when shooting is performed by stopping the AF function and fixing the focus, in the first embodiment, the automatic focusing control means 17 automatically focuses. When the operation (function) of the means 16 is stopped (OFF), the environmental temperature of the optical system 1 is detected and stored by the detection means 12, and when the environmental temperature changes thereafter, the automatic focusing means 16 R by using the function of
The R104 is moved to the in-focus position to correct the fluctuation of the image plane position of the optical system due to the change of the environmental temperature.

In the following description, a method of solving the image plane deviation (focus shift) and the image plane deviation centering on the temperature change as the environmental change is described. A similar solution can be applied when out of focus occurs.

Specifically, the correction of the variation of the image plane position of the optical system according to the first embodiment will be described. The control means 7 causes the automatic focusing control means 17 to operate (function) the automatic focusing means 16.
Is stopped (OFF), the detected temperature obtained by the detecting means 12 is used as a reference temperature, and whether or not the detected temperature obtained by the detecting means 12 has changed after the reference temperature is determined (not shown). The circuit determines. If the detected temperature after the determination is changed, the automatic focusing means 16 is caused to function and the lens driving means 9 is drive-controlled based on the focusing signal of the automatic focusing means 16 to adjust the RR 104. By moving to the focal position, the variation of the image plane position of the optical system due to the change of the environmental temperature is corrected. As a result, variations in the image plane position of the optical system due to changes in the ambient temperature are corrected, and good image information can be obtained.

Next, the operation of the first embodiment will be described with reference to the flowchart of FIG. 2. In step 201, it is determined whether the AF function of the automatic focusing means 16 is on or off. In 202, the AF off flag is cleared and the process returns to step 201. If it is off, it is determined in step 203 whether the AF off flag is clear.
The temperature detection value is read in step 2, the temperature detection value (detection temperature) is set as the reference temperature in step 205, and the AF off flag is set in step 206.

If the AF off flag is not cleared in step 203, that is, if it is set, step 2
At 07, the detection means 12 reads the detected temperature value, and at step 208, it is determined whether the detected temperature value (detected temperature) is the same as the reference temperature. If the same, step 201
If not, temperature compensation AF control for moving the RR 104 to the in-focus position by the AF function is performed in step 209, and the detected temperature determined as the determination target with respect to the reference temperature in step 210 is updated as a new reference temperature. , Return to step 201.

In the first embodiment, as described above, when the operation of the automatic focusing means 16 is stopped by the automatic focusing control means 17, the detected temperature obtained by the detecting means 12 is used as the reference temperature. And the detection means 1 for the reference temperature
When the detected temperature obtained from No. 2 is changing, the function of the automatic focusing means 16 is used to perform temperature compensation AF control for moving the RR 104 to the in-focus position to obtain good image information. There is.

[Second Embodiment] A second embodiment shown in FIGS. 3 and 4.
The optical device of the embodiment is provided with manual focus adjusting means 18 and 19 for manually driving the lens driving means 9 through the control means 7 to focus the RR 104.
It has the same configuration as the optical device of the embodiment.

In FIG. 3, reference numerals 18 and 19 denote switches for manual focus adjustment (hereinafter referred to as MFD).
Is to drive the RR 104 to the infinite side.

In the second embodiment, the environmental temperature when the operation of the RR 104 ends when the focus position at the end of the MFD operation is the in-focus position is assumed. That is, when the manual focus adjustment is performed while the operation of the automatic focusing means 16 is stopped by the automatic focusing control means 17, the RR is performed.
When the operation of 104 is stopped, or RR10
When the environmental temperature of the optical system 1 is changed after that, the automatic focusing means 16 is stored.
The RR 104 is moved to the in-focus position using the function of (1) to correct the change in the image plane position of the optical system due to the change in the environmental information.

Specifically, the control means 7 stops the operation of the RR 104 by the switches 18 and 19 for manual focus adjustment while the operation of the automatic focusing means 16 is stopped by the automatic focusing control means 17. Or when the operation of the RR 104 by the manual focus adjustment switches 18 and 19 is completed, the detected temperature obtained by the detecting means 12 is set as a reference temperature, and the detecting means 1 is set after the reference temperature.
A determination circuit (not shown) determines whether the detected temperature obtained from 2 has changed. If the detected temperature after the determination is changed, the automatic focusing means 16 is caused to function and the lens driving means 9 is drive-controlled based on the focusing signal of the automatic focusing means 16 to adjust the RR 104. By moving to the focal position, the variation of the image plane position of the optical system due to the change of the environmental temperature is corrected. As a result, variations in the image plane position of the optical system due to changes in the ambient temperature are corrected, and good image information can be obtained.

Next, the operation of the second embodiment will be described with reference to the flowchart of FIG. 4. In step 401, it is determined whether the AF function of the automatic focusing means 16 is on or off. In 402, the AF off flag is cleared and the process returns to step 401. If it is off, it is determined in step 403 whether the MFD switch 18 or 19 is on or off, and if either is on, step 404
In step 405, the MFD off flag is cleared, and the flow returns to step 401. If it is off, it is determined in step 405 whether the MFD off flag is clear. If it is clear, the temperature detection value is read in step 406, and step 407.
At, the temperature detection value (detection temperature) is set as the reference temperature, and at step 408, the MFD off flag is set.

If the AF off flag is not cleared in step 405, that is, if it is set, step 40
In step 9, the detected temperature value is read, and in step 410, it is determined whether the detected temperature value (detected temperature) is the same as the reference temperature. If they are the same, the process returns to step 401, and if they are different, the RR is set to the in-focus position by the AF function in step 411.
The temperature-compensated AF control for moving 104 is performed, and the detected temperature determined as the determination target with respect to the reference temperature in step 412 is updated as a new reference temperature.
Return to 01.

In the second embodiment, as described above, the RR 104 by the manual focus adjustment switches 18 and 19 is in a state where the operation of the automatic focusing means 16 is stopped by the automatic focusing control means 17. Is stopped or the operation of the RR 104 is finished, the detected temperature obtained by the detecting means 12 is set as a reference temperature, and the detected temperature obtained by the detecting means 12 changes with respect to the reference temperature. If there is, use the function of the automatic focusing means 16
Good image information is obtained by performing temperature compensation AF control for moving the R104 to the in-focus position.

The manual focus adjusting means 18 and 19 are not limited to the ON / OFF state of the switch as described above, but may be turned on / off state.
Any type of motion may be used as long as such a motion can be detected.

[Third Embodiment] A third embodiment shown in FIGS. 5 and 6.
The optical apparatus according to the first embodiment is provided with the manual zooming adjusting means 20 and 21 for zooming the variator lens 102 for manually driving the lens driving means 8 via the control means 7, except that the optical apparatus according to the first embodiment. It has the same configuration as.

In FIG. 5, reference numerals 20 and 21 designate switches for manual variable magnification adjustment.
0 drives the variator lens 102 to the tele side and the switch 19 to the wide side.

In the third embodiment, while the operation of the automatic focusing means 16 is stopped by the automatic focusing control means 17, the angle of view is changed by the zoom operation by the switches 20 and 21 for manual variable magnification adjustment. If a change is made, it is determined that the camera is no longer left in the state of being left unattended for shooting, and the ambient temperature at the end of the zoom operation by the manual zoom adjustment switches 20 and 21 is stored. Deemed,
When the environmental temperature of the optical system 1 changes in such a standing state, the function of the automatic focusing means 16 is used to move the RR 104 to the in-focus position, and the image plane of the optical system accompanying the change of the environmental temperature. The position change is corrected.

Specifically, the control means 7 zooms the variator lens 102 by the manual variable magnification adjusting means 20 and 21 while the automatic focusing control means 17 stops the operation of the automatic focusing means 16. When the above is completed, the detection temperature obtained by the detection means 12 is set as a reference temperature, and a determination circuit (not shown) determines whether or not the detection temperature obtained by the detection means 12 has changed after the reference temperature. If the detected temperature after the determination is changed, the automatic focusing means 16 is caused to function and the lens driving means 9 is drive-controlled based on the focusing signal of the automatic focusing means 16 to adjust the RR 104. By moving to the focal position, the variation of the image plane position of the optical system due to the change of the environmental temperature is corrected. As a result, variations in the image plane position of the optical system due to changes in the ambient temperature are corrected, and good image information can be obtained.

Next, the operation of the third embodiment will be described with reference to the flowchart of FIG. 5. In step 601, it is determined whether the AF function of the automatic focusing means 16 is on or off. In 602, the AF off flag is cleared and the process returns to step 601. If it is off, it is determined in step 603 whether the zoom switch 20 or 21 is on or off. If either one is on, step 604 is executed.
, Clear the off flag and return to step 601.
If it is off, it is determined in step 605 whether the zoom-off flag is clear, and if it is clear, step 606.
The temperature detection value is read in, the temperature detection value (detection temperature) is set as the reference temperature in step 607, and the zoom-off flag is set in step 608.

If the zoom-off flag is not cleared in step 605, that is, if it is set, step 6
The temperature detection value is read in 09, and it is determined in step 610 whether the temperature detection value (detection temperature) and the reference temperature are the same. If they are the same, the process returns to step 601, and if they are not the same, in step 611 the AF function is used to move the focus position to R.
Temperature compensation AF control for moving R104 is performed, and the detected temperature is set as a reference temperature in step 612, and the process returns to step 601.

In the third embodiment, as described above, in the state where the operation of the automatic focusing means 16 is stopped by the automatic focusing control means 17, the manual variable magnification adjusting means 2 is used.
When the zoom operation by 0, 21 is completed, the detecting means 1
When the detected temperature obtained from No. 2 is the reference temperature and the detected temperature obtained from the detection unit 12 changes with respect to the reference temperature, the RR 10 is utilized by utilizing the function of the automatic focusing unit 16.
Good image information is obtained by performing temperature-compensated AF control for moving 4 to the in-focus position.

The manual variable-magnification adjusting means 20 and 21 are not limited to the ON / OFF state of the switches as described above, but may be turned on / off states.
Any type of motion may be used as long as such a motion can be detected.

[Fourth Embodiment] A fourth embodiment shown in FIGS. 7 and 8.
The optical device of the embodiment is configured similarly to the optical device of the first embodiment except for the control means 7 '. That is, in the optical device of the fourth embodiment, a reference temperature T0 (reference environmental temperature) described later (in the fourth embodiment, is stored in a storage unit (storage device) (not shown) of the control unit 7 ′ that controls the entire optical device. The position data of the movable lens group 104 at 20 ° C.) and a plurality of temperature correction coefficients per unit temperature for correcting the position data based on the environmental temperature (detected temperature) from the detection means 12. The control information including the data Trr is stored, and the detection means 12 is added to the temperature correction coefficient data Trr.
The correction amount (temperature correction position data) for correcting the fluctuation of the image plane position due to the environmental temperature change of the optical system by multiplying the temperature change value ΔT which is the absolute value of the difference between the detected temperature of the It has a temperature compensation control function of obtaining Prr and moving the RR 104 in the optical axis direction by the lens driving means 9 by the correction amount Prr.

Temperature change value Δ of such temperature compensation control function
The relational expression of T, the focus movement amount Trr, and the correction amount Prr is shown below.

ΔT = | detected temperature−reference environment temperature | Prr = ΔT × Trr Here, the temperature correction coefficient data Trr is defined as a function of the position of the movable lens group for zooming. The above equation can be applied to the humidity as it is.

In the fourth embodiment, when the operation (function) of the automatic focusing means 16 is stopped (OFF) by the automatic focusing control means 17, the environmental temperature of the optical system 1 is detected. 12, the temperature change value ΔT of the difference between the latest detected temperature obtained by the detection means 12 after the environmental temperature and the reference temperature is stored.
Or not is determined. When the temperature change value ΔT does not exceed the predetermined specified value Kt, the correction amount (temperature correction position data) Prr is obtained from the above relational expression and the RR 104 is moved by the lens driving means 9 to change the optical system according to the change of the environmental temperature. If the temperature change value ΔT exceeds the prescribed value Kt, the RR 104 is moved to the in-focus position by using the function of the automatic focusing means 16 and the ambient temperature is corrected. The change of the image plane position of the optical system due to the change of is corrected.

More specifically, the control means 7 ′ detects the temperature detected by the detecting means 12 when the operation (function) of the automatic focusing means 16 is stopped (OFF) by the automatic focusing control means 17. The temperature change value ΔT of the difference between the latest detected temperature obtained by the detection means 12 and the reference temperature after the detection temperature is calculated, and the absolute value of this temperature change value ΔT is a prescribed value Kt. Or not is determined. And
When the absolute value of the temperature change value ΔT does not exceed the predetermined specified value Kt, the correction amount (temperature correction position data) Prr is obtained from the above relational expression and the RR 104 is moved by the lens driving means 9 to change the environmental temperature. Correction of the image plane position of the optical system due to
When the absolute value of the above-mentioned value exceeds the specified value Kt, the automatic focusing means 16 is caused to function and the lens driving means 9 is drive-controlled based on the focusing signal of the automatic focusing means 16 to perform the RR104.
Is moved to the in-focus position to correct the change in the image plane position of the optical system due to the change in environmental temperature. As a result, variations in the image plane position of the optical system due to changes in the ambient temperature are corrected, and good image information can be obtained.

Next, the operation of the fourth embodiment will be described with reference to the flowchart of FIG. 8. In step 201 ', it is determined whether the AF function of the automatic focusing means 16 is on or off. In step 202 ', the AF off flag is cleared and the process returns to step 201'. If it is off, it is determined in step 203 'whether the AF off flag is clear. If it is clear, the temperature detection value is read by the detecting means 12 in step 204', Step 20
In 5 ′, the temperature detection value (detection temperature) is set as the detection temperature T1 in the MF (manual focus) mode,
In step 206 ', the AF off flag is set.

If the AF off flag is not cleared in step 203 ', that is, if it is set, the temperature detection value is read by the detecting means 12 in step 207', and the temperature detection value (detection temperature) is previously detected in step 208 '. It is determined whether the temperature is the same as T1. If they are the same, return to step 201 ', and if they are different, step 209'
In step 207 ′, the temperature change value ΔT which is the difference between the detected temperature and the reference temperature T0 obtained in step 207 ′ is obtained, and it is determined whether or not the absolute value exceeds a predetermined specified value Kt.
If T does not exceed the specified value Kt, the compensation amount Prr is obtained from the above relational expression in step 210 ′, and the temperature compensation control is performed to correct the fluctuation of the image plane position of the optical system by moving the RR 104. If the absolute value of the same temperature change value ΔT exceeds the specified value Kt in 209 ′, the temperature compensation AF control for moving the RR 104 to the in-focus position by the AF function is performed in step 211 ′, and the previously detected temperature in step 212 ′. T1 is updated to the detected temperature later, and the process returns to step 201 ′.

In the fourth embodiment, as described above, the latest detected temperature obtained from the detecting means 12 when the operation of the automatic focusing means 16 'is stopped by the automatic focusing control means 17'. When the temperature change value ΔT of the difference between the reference temperature and the reference temperature does not exceed the predetermined specified value Kt, the correction amount P of the RR 104 is set.
rr is obtained and the RR 104 is moved by the lens driving means 9 to perform temperature compensation control for correcting the fluctuation of the image plane position of the optical system, while the absolute value of the temperature change value ΔT is the same specified value K.
If it exceeds t, the temperature compensation AF for moving the RR 104 to the in-focus position by utilizing the function of the automatic focusing means 16 described above.
By performing control, good image information is obtained.

The reference temperature T0 in the fourth embodiment is
For example, it may be a value based on the absolute value of the temperature or desired temperature when the lens is adjusted, and is not particularly limited, but it is an approximate value of the environmental temperature at which the optical device is actually used. If so, the error due to the arithmetic processing is reduced, which is preferable.

The prescribed value Kt for determining whether or not to activate the AF function can be arbitrarily determined according to the optical characteristics of the optical system, the material characteristics, the specifications of the optical equipment, and the like. It can be stored in a possible storage means and can be changed at any time as needed.

[Fifth Embodiment] The optical apparatus according to the fifth embodiment shown in FIGS. 9 and 10 is a manual focus adjusting means for manually driving the lens driving means 9 via the control means 7'to focus the RR 104. Except for providing 18 'and 19', it has the same configuration as the optical device of the fourth embodiment.

In FIG. 9, 18 'and 19' are switches for manual focus adjustment (hereinafter referred to as MFD), and when the switch is ON, the switch 18 'is on the close side and the switch 19' is on the infinite side. It drives the RR 104.

In the fifth embodiment, the environmental temperature when the operation of the RR 104 ends when the focus position at the end of the MFD operation is the in-focus position is assumed. That is, when manual focus adjustment is performed in a state where the operation of the automatic focusing means 16 is stopped by the automatic focusing control means 17 ', R is set.
When the operation of R104 is stopped, or RR1
The environmental temperature at the end of the operation of 04 is stored, and the temperature change value ΔT of the difference between the latest detected temperature obtained by the detection means 12 and the reference temperature after the environmental temperature is a predetermined specified value Kt described later. Determine if it exceeds. When the temperature change value ΔT does not exceed the predetermined specified value Kt, the correction amount (temperature correction position data) Prr is obtained from the above relational expression and the RR 104 is moved by the lens driving means 9 to change the optical system according to the change of the environmental temperature. Of the image plane position of the
When the temperature change value ΔT exceeds the specified value Kt, the function of the automatic focusing means 16 is used to move the RR 104 to the in-focus position to change the image plane position of the optical system due to the change in the environmental temperature. I am trying to correct.

Specifically, the control means 7 ', when the operation of the automatic focusing means 16 is stopped by the automatic focusing control means 17', switches 18 ', 1 for manual focus adjustment.
When the operation of RR104 by 9'is stopped,
Or R by manual focus adjustment switch 18 ', 19'
When the operation of R104 is completed, the detected temperature obtained by the detecting means 12 is stored, and the temperature change value ΔT of the difference between the latest detected temperature obtained by the detecting means 12 after the detected temperature and the reference temperature is calculated. Then, a determination circuit (not shown) determines whether or not the absolute value of the temperature change value ΔT exceeds a predetermined specified value Kt. When the absolute value of the temperature change value ΔT does not exceed the predetermined specified value Kt, the correction amount (temperature correction position data) Prr is calculated by the above-mentioned relational expression and the lens driving means 9 is obtained.
The RR 104 is moved to correct the variation of the image plane position of the optical system due to the change of the environmental temperature. On the other hand, when the absolute value of the temperature change value ΔT exceeds the specified value Kt, the above automatic The focusing means 16 is caused to function, and the lens driving means 9 is driven and controlled based on the focusing signal of the automatic focusing means 16 to move the RR 104 to the focusing position, thereby forming an image of the optical system according to a change in environmental temperature. The fluctuation of the surface position is corrected. As a result, variations in the image plane position of the optical system due to changes in the ambient temperature are corrected, and good image information can be obtained.

Next, the operation of the fifth embodiment will be described with reference to the flowchart of FIG. 10. In step 401 ′, it is determined whether the AF function of the automatic focusing means 16 is on or off. In step 402 ', the AF off flag is cleared and the process returns to step 401'. If it is off, it is determined in step 403 'whether the AF off flag is clear. If it is clear, the temperature detection value is read by the detection means 12 in step 404'. , Step 4
In 05 ′, the detected temperature value (detected temperature) is set as the detected temperature T1 in the MF (manual focus) mode, and in step 206 ′, the AF off flag is set.

If the AF off flag is not cleared in step 403 ', that is, if it is set, it is determined in step 407' whether the MFD switch 18 'or 19' is on or off, and if either is on, step 408 '. In step 409 ′, the MFD off flag is cleared and the flow returns to step 401 ′. If it is off, it is determined in step 409 ′ whether the MFD off flag is clear. If it is clear, the MFD off flag is set in step 410 ′, and the temperature detection value is detected in step 404 ′. Is read, and the processing after step 405 ′ is performed.

If the MFD off flag is not cleared in step 409 ', that is, if it is set, the temperature detection value is read in step 411' and step 41
In 2 ', it is determined whether the detected temperature value (detected temperature) is the same as the previously detected temperature T1. If they are the same, step 401 '
Return to step 4 and if different, step 4 in step 413 '.
11 ', the temperature change value ΔT of the difference between the detected temperature and the reference temperature T0 is obtained, and it is determined whether or not the absolute value thereof exceeds a predetermined specified value Kt, and the temperature change value ΔT is set to the specified value Kt. If it does not exceed, the temperature compensation control for correcting the fluctuation of the image plane position of the optical system is performed in step 414 ′ by obtaining the correction amount Prr from the above relational expression and moving the RR 104, while the same in step 413 ′. Temperature change value Δ
If the absolute value of T exceeds the specified value Kt, step 41
In 5 ′, temperature compensation AF control for moving the RR 104 to the in-focus position is performed by the AF function, in step 416 ′, the previously detected temperature T1 is updated to the later detected temperature, and the process returns to step 401 ′.

In the fifth embodiment, as described above, the switches 18 'and 19' for manual focus adjustment are provided in the state where the operation of the automatic focusing means 16 'is stopped by the automatic focusing control means 17'. When the operation of the RR104 due to is stopped, or when the operation of the RR104 is completed,
When the temperature change value ΔT of the difference between the latest detected temperature obtained by the detection means 12 and the reference temperature does not exceed the predetermined specified value Kt, the correction amount Prr of the RR 104 is obtained, and the RR 104 is moved by the lens drive means 9 to perform the optical operation. When the absolute value of the temperature change value ΔT exceeds the specified value Kt, temperature compensation control is performed to correct the fluctuation of the image plane position of the system, and the function of the automatic focusing means 16 is used. By performing the temperature compensation AF control for moving the RR 104 to the in-focus position,
I try to get good image information.

The manual focus adjusting means 18 'and 19' are
As mentioned above, the switch is not limited to ON / OFF but ON / O
Any type of FF can be used as long as it can detect an operation.

[Sixth Embodiment] The optical apparatus according to the sixth embodiment shown in FIGS. 11 and 12 is a variator lens 1 in which the lens driving means 8 is manually driven through the control means 7 '.
Manual zooming means 20 ', 21' for zooming 02
The configuration is similar to that of the optical device according to the fourth embodiment except that the above-described configuration is provided.

In FIG. 11, 20 'and 21' are switches for manual variable magnification adjustment. When the switch is ON, the switch 20 'sets the variator lens 102 to the tele side and the switch 19' sets the variator lens 102 to the wide side. To drive.

In the sixth embodiment, while the operation of the automatic focusing means 16 is stopped by the automatic focusing control means 17, the switches 20 ', 21' for manual variable magnification adjustment are set.
When the angle of view is changed by the zoom operation by, it is judged that it is no longer in the state of being left for shooting, and the ambient temperature is stored at the end of the zoom operation by the switches 20 'and 21' for manual variable magnification adjustment. Is again considered to be in an abandoned state, and in such an abandoned state the environmental temperature detecting means 1
It is determined whether or not the temperature change value ΔT of the difference between the latest detected temperature obtained by the detection means 12 after the environmental temperature and the reference temperature and the reference temperature is exceeded by the predetermined specified value Kt. To do. When the temperature change value ΔT does not exceed the predetermined specified value Kt, the correction amount (temperature correction position data) Prr is obtained from the above-mentioned relational expression, and the RR 104 is moved by the lens driving means 9 to move the optics according to the change of the environmental temperature. The fluctuation of the image plane position of the system is corrected, while the temperature change value Δ
When T exceeds the specified value Kt, the automatic focusing means 16
The RR 104 is moved to the in-focus position using the function of (1) to correct the fluctuation of the image plane position of the optical system due to the change of the environmental temperature.

More specifically, the control means 7 is operated by the automatic focusing control means 17 'while the operation of the automatic focusing means 16 is stopped. When the zoom operation of is finished, the detected temperature obtained by the detecting means 12 is stored, and the temperature change value ΔT of the difference between the latest detected temperature obtained by the detecting means 12 after the detected temperature and the reference temperature is calculated. Then, a determination circuit (not shown) determines whether or not the absolute value of the temperature change value ΔT exceeds a prescribed value Kt. Then, when the absolute value of the temperature change value ΔT does not exceed the predetermined specified value Kt, the correction amount (temperature correction position data) Prr is calculated by the above relational expression.
By moving the RR 104 by the lens driving means 9 to correct the fluctuation of the image plane position of the optical system due to the change of the environmental temperature, while the absolute value of the temperature change value ΔT exceeds the specified value Kt. In this case, the automatic focusing means 16
By moving the RR 104 to the in-focus position by driving and controlling the lens drive means 9 based on the in-focus signal of the automatic in-focus means 16 to change the image-forming plane position of the optical system due to the change in the ambient temperature. Is being corrected. As a result, variations in the image plane position of the optical system due to changes in the ambient temperature are corrected, and good image information can be obtained.

Next, the operation of the sixth embodiment will be described with reference to the flowchart of FIG. 12. In step 601 ', it is determined whether the AF function of the automatic focusing means 16 is on or off. In step 602 ', the AF off flag is cleared and the process returns to step 601'. If it is off, it is determined in step 603 'whether the AF off flag is clear. If it is clear, the temperature detection value is read by the detection means 12 in step 604'. , Step 6
In 05 ', the detected temperature value (detected temperature) is set as the detected temperature T1 in the MF (manual focus) mode, and in step 606', the AF off flag is set.

If the AF off flag is not clear, that is, is set in step 603 ', in step 607' the switch 20 'or 2 for manual variable magnification adjustment is set.
It is determined whether 1'is on or off, and if either is on, the MFD off flag is cleared in step 608 'and the process returns to step 601'. If it is off, step 609 '.
At step 610 ', the zoom-off flag is set. If the zoom-off flag is clear, the zoom-off flag is set. At step 604', the temperature detection value is read, and the processing from step 605 'onward is performed.

If the zoom-off flag is not cleared in step 609 ', that is, if it is set, the temperature detection value is read in step 611' and step 61
In 2 ', it is determined whether the detected temperature value (detected temperature) is the same as the previously detected temperature T1. If they are the same, step 601 '
Return to step 6 and if different, step 6 in step 613 '.
11 ', the temperature change value ΔT of the difference between the detected temperature and the reference temperature T0 is obtained, and it is determined whether or not the absolute value thereof exceeds a predetermined specified value Kt, and the temperature change value ΔT is set to the specified value Kt. If it does not exceed, the temperature compensation control for correcting the fluctuation of the image plane position of the optical system is performed by obtaining the correction amount Prr from the above relational expression in step 614 ′ and moving the RR 104, while the same is performed in step 613 ′. Temperature change value Δ
If the absolute value of T exceeds the specified value Kt, step 41
In 5 ′, temperature compensation AF control for moving the RR 104 to the in-focus position is performed by the AF function, in step 616 ′ the previously detected temperature T1 is updated to the later detected temperature, and the process returns to step 601 ′.

In the sixth embodiment, as described above, in the state where the operation of the automatic focusing means 16 is stopped by the automatic focusing control means 17, the manual variable magnification adjusting means 2 is used.
If the temperature change value ΔT of the difference between the latest detected temperature obtained by the detection means 12 and the reference temperature does not exceed the predetermined specified value Kt when the zoom operation of the variator lens 102 by 0 ′, 21 ′ is completed, the RR104. The lens driving means 9 moves the RR 104 to perform the temperature compensation control for correcting the variation of the image plane position of the optical system, while the absolute value of the temperature change value ΔT is equal to the specified value Kt. If it exceeds, the temperature compensation AF control for moving the RR 104 to the in-focus position is performed using the function of the automatic focusing means 16 to obtain good image information.

The manual variable magnification adjusting means 20 'and 21' are
As mentioned above, the switch is not limited to ON / OFF but ON / O
Any type of FF can be used as long as it can detect an operation.

As described above, since the optical device of this embodiment is configured as described above, the temperature changes during zooming and while the AF function is operating, or while the AF function is stopped. If there is, or even if the temperature is constant and changes with respect to the reference temperature, good image information without focus deviation can be obtained.

Further, in the optical device of this embodiment,
Although one detecting means 12 is used, if a plurality of detecting means 12 are used to compensate for fluctuations in the image plane position of the optical system 1, more accurate temperature compensation control becomes possible.

Further, in the optical instrument of this embodiment,
Although the case where there is a change in temperature as an environmental change is illustrated, even if there is a change in humidity or a change in atmospheric pressure, if these detection means are provided, it can be handled in the same manner as described above. For example, the temperature detecting means and the humidity detecting means may be provided respectively, or both detecting means may be provided in the optical device to correct the focus shift due to the temperature change and the humidity change.

[0089]

As described above, according to the present invention, an automatic focusing means is used by using an optical system (photographing lens) having a movable lens group that moves on the optical axis for focusing and zooming. Even if an environmental change such as temperature change or humidity change occurs when the automatic focusing function is stopped for some reason during operation and shooting, Accordingly, the moving lens group is driven and controlled by the lens driving means using the automatic focusing function, so that the deviation of the image plane position caused by the environmental change can be corrected with high accuracy and the high optical performance. It is possible to maintain performance,
Therefore, it is possible to provide an optical device suitable for a video camera, a silver halide camera, an electronic still camera, and the like. In addition, when using an optical system (shooting lens) that has a moving lens group that moves on the optical axis for focusing and zooming, when operating the automatic focusing means for shooting, it is automatically performed for some reason. Even when an environmental change such as a temperature change or a humidity change occurs when the focusing function is stopped, the moving lens group is moved by the lens driving means using the automatic focusing function according to the environmental change. Drive control, or the movement of the moving lens group is appropriately determined each time by the control information according to the environmental change, and the moving lens group is driven and controlled by the lens driving means. It is possible to correct the image plane position shift that occurs with high precision and maintain high optical performance, thus providing an optical device suitable for video cameras, silver halide cameras, electronic still cameras, and the like. Can .

[Brief description of drawings]

FIG. 1 is a schematic view of a main part showing a first embodiment of an optical device of the present invention.

FIG. 2 is a flowchart showing an operation of the optical device shown in FIG.

FIG. 3 is a schematic view of a main portion showing a second embodiment of the optical device of the present invention.

FIG. 4 is a flowchart showing an operation of the optical device shown in FIG.

FIG. 5 is a sectional view of a key portion showing a third embodiment of the optical device of the present invention.

6 is a flowchart showing the operation of the optical device shown in FIG.

FIG. 7 is a sectional view of a key portion showing a fourth embodiment of the optical device of the present invention.

8 is a flowchart showing the operation of the optical device shown in FIG.

FIG. 9 is a schematic view of a main portion showing a fifth embodiment of the optical device of the present invention.

10 is a flowchart showing the operation of the optical device shown in FIG.

FIG. 11 is a sectional view of a key portion showing a sixth embodiment of the optical device of the present invention.

12 is a flowchart showing the operation of the optical device shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Optical system 102,104 Moving lens group 7,7 'Control means 8,9 Lens drive means 12 Detection means 16 Automatic focusing means 17,17' Automatic focusing control means 18,19,18 ', 19' Automatic focus adjustment Means ΔT Temperature (or humidity) change value (difference value) Trr Temperature (or humidity) correction coefficient data T0 Reference temperature (or reference humidity) (Reference value) Prr Correction amount (temperature (or humidity) correction position data)

Claims (23)

[Claims] 1. An optical device for forming an object image on an image plane by an optical system including a moving lens group, a lens driving means for driving the moving lens group, a control means for controlling the lens driving means, and the optical means. Detection means for detecting temperature information and / or humidity information regarding the system; automatic focusing means for producing a focusing signal based on a signal of the focusing state of the optical system to cause the lens driving means to perform a focusing operation on the movable lens group; And the automatic focusing control means for controlling the operation of the automatic focusing means, the control means, when the operation of the automatic focusing means is stopped by the automatic focusing control means,
An optical device characterized in that the position of an image plane is corrected by controlling the lens driving means by utilizing the function of the automatic focusing means based on the output signal from the detecting means. 2. The optical device according to claim 1, further comprising a manual focus adjusting means for driving and controlling the lens driving means through the control means to adjust the focus of the movable lens group, and the control means. When the operation of the movable lens group by the manual focus adjustment means is stopped while the operation of the automatic focus control means is stopped by the automatic focus control means, an output signal from the detection means is output. On the basis of the above, the optical apparatus is characterized in that the position of the image plane is corrected by controlling the lens driving means by utilizing the function of the automatic focusing means. 3. The optical device according to claim 1, further comprising a manual focus adjusting means for driving and controlling the lens driving means through the control means to adjust the focus of the movable lens group, and the control means. When the operation of the movable lens group by the manual focus adjusting means is completed while the operation of the automatic focusing means is stopped by the automatic focusing control means, the automatic focusing is performed based on the output signal from the detecting means. An optical apparatus characterized in that the position of an image plane is corrected by controlling the lens driving means by utilizing the function of a focusing means. 4. The control unit according to claim 1, 2 or 3, wherein the control unit determines whether or not a detection value obtained after the detection value has changed with reference to the detection value in the output signal from the detection unit. When the detected value obtained after that has changed, the position of the image plane is corrected by controlling the lens driving means using the function of the automatic focusing means. Optical equipment. 5. The control means according to claim 4, wherein, after the determination is completed, the detection value obtained after the detection value is changed based on the detection value after the determination target in the previous determination. An optical device characterized by determining whether or not it is present. 6. An optical apparatus for forming an object image on an image forming plane by an optical system including a moving lens group, a lens driving means for driving the moving lens group, a control means for controlling the lens driving means, and the movement. Storage means for storing control information for driving the lens group, detection means for detecting temperature information and / or humidity information about the optical system, and a focusing signal generated based on a signal of a focusing state of the optical system. It has an automatic focusing means for focusing the moving lens group by the lens driving means, and an automatic focusing control means for controlling the operation of the automatic focusing means, wherein the control means is automatically controlled by the automatic focusing control means. Controlling the lens driving means by using the control information based on the output signal from the detecting means or the function of the automatic focusing means when the operation of the focusing means is stopped. Optical apparatus and correcting the position of the more the image plane. 7. The optical device according to claim 6, further comprising a manual focus adjusting unit that drives and controls the lens driving unit through the control unit to adjust the focus of the movable lens group, and the control unit includes: When the operation of the movable lens group by the manual focus adjustment means is stopped while the operation of the automatic focus control means is stopped by the automatic focus control means, an output signal from the detection means is output. An optical device characterized in that the position of the image plane is corrected by controlling the lens driving means based on the control information or the function of the automatic focusing means based on the above. 8. The optical device according to claim 6, further comprising a manual focus adjusting means for driving and controlling the lens driving means through the control means to adjust the focus of the movable lens group, and the control means When the operation of the movable lens group by the manual focus adjusting means is terminated while the operation of the automatic focusing means is stopped by the automatic focusing control means, the operation is performed based on an output signal from the detecting means. An optical device which corrects the position of an image plane by controlling the lens driving means by utilizing control information or the function of the automatic focusing means. 9. The control unit according to claim 6, 7 or 8, wherein the control unit determines a difference value obtained from the latest detection value of the output signal from the detection unit and a preset reference value to be a prescribed value. If the difference value does not exceed the specified value, the position of the image plane is corrected by controlling the lens driving means using the control information, and the difference value is An optical device wherein the position of the image plane is corrected by controlling the lens driving means using the function of the automatic focusing means when the value exceeds the specified value. 10. The control device according to claim 9, wherein:
After the determination is completed, if the detection value obtained after the latest detection value has changed with respect to the latest detection value that is the determination target in the previous determination, the detection value obtained later and the reference It is determined whether the difference value obtained from the value exceeds a predetermined specified value, and if the difference value does not exceed the specified value,
The position of the image plane is corrected by controlling the lens driving means using the control information, and when the difference value exceeds the specified value, the function of the automatic focusing means is used to An optical device characterized in that the position of an image plane is corrected by controlling a lens driving means. 11. The control information according to claim 6, 7 or 8, wherein the position data of the moving lens group at a reference temperature and / or a reference humidity and the position data are corrected based on an output signal from the detecting means. Including a plurality of temperature correction coefficient data or / and humidity correction coefficient data
The control means extracts control information for controlling the lens driving means from the storage means according to temperature and / or humidity detected by the detection means, and corrects the temperature of the movable lens group based on the control information. An optical device characterized by calculating position data and / or humidity correction position data. 12. The optical device according to claim 11, wherein the temperature correction position data is defined as a function of a difference value between the temperature detected by the detection means and the reference temperature. 13. The optical device according to claim 11, wherein the humidity correction position data is defined as a function of a difference value between the humidity detected by the detection means and the reference humidity. 14. The temperature correction position data according to claim 11, wherein the temperature correction coefficient data is obtained by multiplying a difference value between the temperature detected by the detection means and the reference temperature. Optical equipment. 15. The humidity correction position data according to claim 11, wherein the difference value between the humidity detected by the detection means and the reference humidity is multiplied by the humidity correction coefficient data. Optical equipment. 16. The optical apparatus according to claim 11, wherein the temperature correction coefficient data is defined as a function of a position of a moving lens unit for zooming. 17. The optical device according to claim 11, wherein the humidity correction coefficient data is defined as a function of a position of a moving lens unit for zooming. 18. The optical device according to claim 1, wherein the optical device is a video camera which forms an object image on an image forming surface by an optical system including a moving lens group. And optical equipment. 19. A method according to claim 1, 2, 3, 6, 7, 8 or 1.
8. In the optical device described in 8, the optical system is a rear focus type zoom lens. 20. Claims 1, 2, 3, 6, 7, 8, 18
Alternatively, in 19, the optical system has a plurality of lens groups, and the plurality of lens groups have a plastic lens in at least a part thereof. 21. The optical device according to claim 1, 2, 3, 6, 7 or 8, wherein the detection means has at least one sensor using a temperature sensitive resistor. 22. An optical device according to claim 1, 2, 3, 6, 7 or 8, wherein said detection means has at least one sensor using a thermistor. 23. The optical device according to claim 1, 2, 3, 6, 7 or 8, wherein the detection means has at least one sensor using a capacitance type sensor.