JPH01180508A - Variable power microscope - Google Patents

Abstract

PURPOSE:To exactly obtain a desired observation magnification by an easy operation by providing a storage means for storing a desired magnification and an input means for driving a driving system and controlling the driving so as to execute variable power to the stored magnification by an input signal. CONSTITUTION:A forward rotation and a backward rotation of a motor in a lens driving system 6 are executed by stepping on a seesaw type foot switch 7 in the direction A or the direction B, and can be varied to a high magnification and a low magnification, respectively. Subsequently, when a desired observation magnification is determined and a write switch 12 is turned ON, a signal from an encoder 8 passes through a controller 9 and a desired magnification is stored in a memory 10 by a necessary number. The controller 9 executes a control of a lens driving system by an input of the foot switch 7, write and read of the memory 10 for storing the desired magnification, and a control of an indicator 11 of the observation magnification. In such a way, the desired observation magnification is obtained exactly, and the variable power operation is also simplified.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a variable magnification microscope that is mainly used in eye and ear surgery, and is particularly suitable for surgery in which the observation magnification can be continuously varied. .

[Prior Art] Conventionally, there are two types of surgical microscopes with variable magnification of observation optical systems: a zoom type continuous variable magnification type and a drum type turret type stepwise variable magnification type. The continuous magnification type has the advantage of allowing the operator to freely select the desired observation magnification compared to the stepwise variable magnification type. It has the disadvantage that it must be done delicately and takes time to operate.

In surgery under a microscope, the observation magnification is different compared to macroscopic surgery, so in order to safely perform surgery, the correspondence between vision and movement is likely to change. It is necessary for the surgeon to study this thoroughly in advance. Therefore, the reality is that surgeons use the vicinity of the predetermined magnification that they have learned during surgery, but with conventional continuously variable microscopes, which take time to select a fixed magnification, it is especially necessary to change the magnification many times. In some cases, the magnification may be changed intuitively based on the field of view, which has the disadvantage that the magnification tends to be unstable and the surgery cannot be performed smoothly. In these respects, it can be said that the stepwise magnification type is superior, but the stepwise magnification of this method is unique to the device, and the operator cannot select any desired magnification.

[Object of the Invention] An object of the present invention is to provide a variable magnification microscope that can improve the drawbacks of the conventional example and can accurately obtain a desired observation magnification with easy operation.

[Summary of the Invention] The gist of the present invention for achieving the above-mentioned object is to provide a variable magnification microscope having an observation optical system capable of continuously changing magnification and a drive system that drives the observation optical system to change the magnification. a storage means for storing a magnification of a predetermined tlj; an input means for driving the drive system to change the magnification to the desired magnification stored in the storage means; and an input signal from the input means to change the stored magnification The variable magnification microscope is characterized in that it has a control means for driving to change the magnification.

[Embodiments of the invention] The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 is a configuration diagram illustrating the case of observing the test object Et. In front of the test object E, a common objective lens 1 is arranged in pairs on the left and right optical axes OL and OR, respectively. Afocal zoom system 2L to 4L? The subject E is stereoscopically observed by the examiner through R to 4R and the eyepiece lens barrel sections 5L and 5R. Here, the afocal zoom lenses 2L and 2R are compensators, and 3L
, 3R are variators, which change the observation magnification by moving in the directions of arrows C and D on the optical axes OL and OR, while maintaining a predetermined relationship by the lens drive system 6. , lenses 2L, 3L and 2
R13R is mechanically connected by a cam, and the cam is driven and moved by a motor within the lens drive system 6. The motor in the lens drive system 6 is rotated forward or reverse by pressing the scene-type foot switch 7 in direction A or B, and is configured to be able to change to high magnification or low magnification, respectively. Furthermore, an encoder 8 is attached to the lens drive system 6 to detect the positions of the variator lenses 3L and 3R, and the encoder 8 is connected to a controller 9.

The controller 9 controls the lens drive system 6 through input from the foot switch 7, writes and reads the desired magnification in the memory 10, and controls the observation magnification display 11. It is also connected.

In the above configuration, the caster first uses footswee.

Adjust the desired observation magnification by stepping on the chia in direction A or B. During this time, the encoder 8 detects the positions of the variator lenses 3L and 3R, calculates the magnification, and continues to display the magnification on the display 11 through the controller 9. When the operator turns on the writing switch 12 after determining the desired observation magnification, the signal from the encoder 8 is transmitted to the controller 9.
is stored in the memory 10 via the . By repeating such operations, the desired magnification β1, β2, β3, etc.
· are stored in the memory 10 as many times as necessary.

Next, the magnification β1 is stored in the memory 10. The control procedure of the controller 9 after β2, β3, . . . is stored will be explained based on the flowchart shown in FIG. In step 1, it is determined whether the A direction of the foot switch 7 is on, and if it is on, it is determined in step 2 whether the magnification is stored in the memory 10. If there is no memory in the memory 10, the lens is driven in step 3, and the operations of steps 3 and 4 are repeated until it is detected that the A direction is turned off in step 4, and the magnification is continuously increased. Ru. On the other hand, if there is memory in the memory 10, the duration time that the A direction is turned on is measured in step 5, and if it is for example 0.5 seconds or more, the process moves to step 3, and the same operation as normal operation is performed. The magnification increases continuously. However, if the time is less than 0.5 seconds, that is, if the operator depresses the foot switch 7 for a short period of time, the lens is driven in step 6, and the magnification is set to β1 in step 8. β2,
The lens driving in step 6 is repeated until one of β3, . . . is detected. During,
In step 7, it is determined whether the B direction of the foot switch 7 is on, and in step 9, it is determined whether the magnification has reached the maximum. If either is Yes, the process moves to step 10 and lens driving is stopped. . Note that step 7 is used when it is desired to interrupt the lens driving described above.

The above explanation is the control procedure when the foot switch 7 is turned on in the A direction, but when the foot switch 7 is turned on in the B direction, the magnification is reduced by the same procedure.

Figure 3 is a conceptual explanatory diagram of the above operation.
In the figure, β1n and β■a-value are values indicating the minimum and maximum observation magnifications, and β1, β2, and β3 are the magnifications stored in the memory 10. When the current observation magnification is β0, if you press the foot switch 7 in direction B for a short time,
The driving of the lens is stopped when the observation magnification β reaches β=β1. Now, if the foot switch 7 is then depressed in the ON direction for a short time, the lens drive will stop when β=β2.

On the other hand, if you continue to press the foot switch 7 in the B direction at the beginning, the observation magnification β will be βwin in the direction of the arrow
It performs the same operation as the conventional device in that it starts moving continuously until it reaches .

Note that various replacement elements can be considered for the individual components in this embodiment. For example, (1) write switch 1
In place of 2, a numeric keypad manual switch is provided to specifically input the magnification. (2) As a transition switch to the desired magnification,
Instead of making a judgment based on the duration of the ON state of the foot switch 7, a separate switch, a two-stage switch, a plurality of switches corresponding to each desired magnification, etc. are provided. (3)
An optical magnification reading device is used instead of the encoder 8 as a magnification detection means. (4) It is conceivable to use a Glino type zoom lens instead of the Galileo type afocal zoom lens in the observation optical system.

Further, as an additional element to further enhance the effects of the present invention, (1) the speed of changing magnification to a desired magnification is set faster than the speed of changing magnification in normal operation. (2) Generate a signal tone when the desired magnification is reached. (3) Prepare a memory area for each surgeon. (The desired magnification for each operator is stored externally on an IC card or the like.

(5) Provide a memory clear switch. (8) Memorize the number of inputs of the movement switch to the desired magnification and perform skip magnification, that is, when the foot switch 7 is pressed twice in the A direction in Fig. 3 for a short time, β = β3. It is possible to change the magnification to .

[Effects of the Invention] As explained above, the variable magnification microscope according to the present invention can adjust the desired observation magnification by providing a means for storing the operator's desired magnification and a means for controlling the change in magnification to the desired magnification. can be obtained accurately, and the operation for changing the magnification to a desired magnification is simplified, significantly reducing the burden on the operator and allowing safe surgery.

[Brief explanation of the drawing]

The drawings show an embodiment of a variable magnification microscope according to the present invention; FIG. 1 is a block diagram of the embodiment, FIG. 2 is a flowchart showing a control procedure, and FIG. 3 is an explanatory diagram of the operation. Reference numeral 1 designates an objective lens, 2 to 4 a zoom lens system, 5 an eyepiece barrel, 6 a lens drive system, 7 a foot switch, 8 an encoder, 9 a controller, and 10 a memory. Patent applicant: Canon Co., Ltd. Drawing 2

Claims (3)

[Claims] 1. A variable magnification microscope having an observation optical system capable of continuously changing magnification and a drive system that drives the observation optical system to change the magnification, a storage means for storing a desired magnification, and a storage means for storing a desired magnification, and a storage means for storing a desired magnification. and a control means for driving the drive system to change the magnification to the stored magnification based on an input signal from the input means. variable magnification microscope. 2. The variable magnification microscope according to claim 1, further comprising a detection means for detecting an observation magnification of the observation optical system, and wherein the control means controls the drive system based on a signal from the detection means. . 3. The input means is a two-contact switch, the two contacts are assigned to select a direction of magnification, and the control means changes the magnification to the closest desired magnification in the selected magnification direction from among the plurality of desired magnifications. A variable magnification microscope according to claim 1, wherein the variable magnification microscope is controlled to perform the following.