JPH0649290Y2 - Medical shadowless lighting system - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical shadowless illuminator, and more particularly to a medical shadowless illuminator capable of automatically focusing light on a desired position of a subject on an operating table.

[0002]

2. Description of the Related Art An illuminating device for illuminating a subject during an operation is required to be able to illuminate without making a shadow on a statement part and to easily adjust an illumination condition. In particular, there is a demand for a device capable of adjusting the light-condensing position during the operation as desired by the practitioner.

Japanese Patent Publication No. 55-25681 discloses an example of such a lighting device. FIG. 1 briefly shows the configuration of this conventional device. The illuminating lamp 1 contains a plurality of illuminating balls and illuminates the subject 2 from above. The light emitter 3 is used to adjust the light collecting position. That is, the practitioner moves the light emitter 3 to a desired focusing position and emits a frequency-modulated light wave (shown by a chain line in the figure) toward the illuminating lamp 1.
This light wave is received by the light receiver 4 built in the illumination lamp 1,
The control is performed so that the illumination light (shown by the solid line in the figure) emitted from the illumination lamp 1 is condensed at the position of the light emitter 3. In this way, the practitioner can obtain the desired illumination light simply by designating the focusing position with the light emitter 3.

[0004]

However, this conventional device has a drawback in that it cannot accurately collect light at a desired position on the subject. Sterile condition is maintained during the operation to prevent secondary infection, but especially the operated part of the subject must be kept clean and foreign objects should not come into direct contact with the treated part. .

However, it is often desirable to collect the illumination light on the treatment section. For example, in FIG. 1, when it is desired to specify the hatched treatment portion 5 on the subject 2 as the light-converging position, the light emitting device 3 must be brought into direct contact with the treatment portion 5 in the conventional device. This is not preferable in terms of preventing secondary infection.

Therefore, in reality, it has been difficult for the conventional apparatus to accurately collect light at a desired position on the subject even if the correction means is used.

Therefore, an object of the present invention is to provide a medical shadowless illumination device capable of accurately and automatically focusing light at a desired position on a subject.

[0008]

DISCLOSURE OF THE INVENTION In the medical shadowless illumination device, the present invention provides a casing arranged above an operating table, an illumination sphere provided in the casing, and illumination from the illumination sphere. The light converging means provided in the housing for converging light on a predetermined position on the operating table and the housing is tilted so that the light collecting position on the operating body becomes a desired position. A first drive means, a second drive means for moving the casing in the vertical direction to adjust the illumination state at the focus position on the subject, and a practitioner holding and operating the hand. Has a main body that is independent of the housing, and can irradiate a desired position on the subject with a wave beam to form an irradiation area. Irradiation means with the function of giving information about the position, and provided in the housing, together with this housing The image forming means for forming an image of the irradiation area on the oblique image forming surface based on the reflected beam from the irradiation area, and the image forming position information by this image forming means and the position information indicating the condensing position are compared. , A first comparison unit that produces an output including information on the direction of the difference when the two do not match, and a first focusing position so that the light collection position moves in the same direction while the output by the comparison unit exists. A first control means for controlling the driving means, and a second control means for controlling the second driving means based on the information about the vertical position of the housing included in the reflected beam from the irradiation region. It is provided.

[0009]

According to the medical shadowless illumination device according to the present invention,
A beam irradiation means is prepared separately from the housing arranged above the operating table. This beam irradiating means can be held and operated by a practitioner. When the practitioner irradiates the desired position on the subject with the beam, an image of this irradiation region is formed on the image forming means provided in the housing. The first control means compares the image formation position information with the condensing position information,
The first drive means is controlled. As a result, the housing is tilted in a direction in which the focus position and the irradiation area of the beam coincide with each other. As described above, according to the present apparatus, the practitioner only has to perform an operation of pointing a desired focusing position with the beam.

Further, the information for controlling the second driving means can be transmitted to the second control means by modulating the wave beam. Therefore, the practitioner can adjust the focus position of the illumination and the focus adjustment by the beam irradiation means.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to illustrated embodiments.

FIG. 2A is a block diagram of an illumination device according to an embodiment of the present invention. The illuminating lamp 1 incorporates a plurality of illuminating balls 6 and a light receiver 4 like the conventional device. The light emitter 3 emits an infrared beam that has been subjected to a predetermined modulation. Now, considering the case where the treatment section 5 is designated as the converging position, the practitioner may irradiate the treatment section 5 with an infrared beam from any position using the light emitter 3. An irradiation area is formed in the treatment section 5 by this irradiation operation, but since it is infrared rays, there is no adverse effect such as secondary infection.

As will be described later, the light receiver 4 receives the infrared rays reflected from this irradiation area, detects the difference between the position of this irradiation area and the current focus position, and gives a detection signal to the CPU 7. Based on this detection signal, the CPU 7 causes the motors M1, M2, M3 and the clutch D to eliminate the difference between the two positions.
A control signal is output to drive 1 and D2.

FIG. 2B shows a bottom view of this device. The motor M1 moves the lamp 1 in the X direction, the motor M2 moves in the Y direction,
Motor M3 is in the Z direction (the direction perpendicular to the paper surface in the figure)
And the clutch D1 is for the motor M1 and the clutch D2 is for the motor M2. The motor M3 driven in the Z direction is a focus adjustment motor.

The functions of the motor and the clutch cause the illumination lamp 1 to be directed in a desired direction and focused at a desired position. The light receiver 4 also moves integrally with the illumination lamp 1. Since the infrared beam emitted from the light emitter 3 is subjected to a predetermined modulation,
(A) The optical path shown by the one-dot chain line is taken and position information is given to the CPU 7, and also information about the focus, illuminance, operation mode, etc. is given. Although the apparatus of this embodiment uses an infrared beam, a light wave of another wavelength,
Alternatively, electromagnetic waves or sound waves may be used, and in short, any wave beam may be used as long as it does not adversely affect the subject.

As shown in FIG. 3A, the light receiver 4 comprises an image forming system 4a and a light receiving sensor 4b. In this embodiment, a lens is used as the image forming system 4a,
In addition, any general imaging system such as a pinhole may be used. In short, it is only necessary to form an image on the light receiving sensor 4b. When a sound wave is used as the wave beam, a proper image forming system and sound wave sensor are used. The beam incident parallel to the optical axis of the image forming system 4a forms an image at the center point O of the light receiving sensor 4b.

Next, the principle of the operation of changing the focusing position in this apparatus will be described. In FIG. 4, the current converging position of the illumination lamp 1 is a point P on the subject 2. As described above, the light receiver 4 is composed of the image forming system 4a and the light receiving sensor 4b. However, when the converging position of the illumination lamp 1 is the point P, the image of the point P through the image forming system 4a is , P ', that is, the center point O of the light receiving sensor 4b.

Now, suppose that the practitioner desires to change the focus position from point P to point Q. In this case, the practitioner may irradiate the point Q with the infrared beam by the light emitter 3. Then, the image at the point Q can be formed at a position deviating from the point Q ', that is, the center point O of the light receiving sensor 4b through the image forming system 4a. In the figure, the alternate long and short dash line indicates the optical path of the infrared beam at this time. Therefore, the illuminating lamp 1 may be moved by each motor so that the point Q ′ comes to the center point O of the light receiving sensor 4b. The light receiver 4 moves together with the illumination lamp 1,
When moving to the position shown by the broken line in the figure, the point Q'is the light receiving sensor 4
It overlaps with the center point O of b, and each motor stops driving. In this way, the focus position automatically moves from point P to point Q.

FIG. 3B is a perspective view of the light receiving sensor 4b used in this embodiment, and FIG. 3C is a developed view thereof. Detecting units X + and X for detecting a deviation in the X direction around the center point O
−, And detection units Y + and Y− that detect a deviation in the Y direction are provided. If the distance between the image formation point and the center point O is within a certain range, these four detectors are sufficient.
Considering the case where the gap becomes large, the detection unit X +
′, X− ′, Y + ′, Y− ′ are provided.

If the image forming point is on X + or X + ', control is performed to drive the motor M1 to move the illuminating lamp 1 in the negative direction of X, and conversely, the image forming point is X- or X-'. If it is above, control is performed to drive the motor M1 to move the lamp 1 in the positive X direction. The same applies to the control in the Y direction. In this way, the illumination lamp 1 is always moved in the direction in which the image forming point coincides with the center point O.

Finally, an overall block diagram of the present lighting device is shown in FIG.
Shown in. An illumination lamp switch unit 71 is provided on the side portion of the illumination lamp 1, and various operations can be manually performed here. The AC power supply AC from the outside is supplied here, and is sent to the power supply unit 74 via a power switch or the like. Power supply 7
4 exchanges this into a predetermined shape and supplies it to the CPU 7 as a driving power source.

When the focus adjustment operation is performed by the illumination lamp switch section 71, the operation signal is given to the manual focus adjustment section 72. The manual focus adjustment unit 72 drives the motor M3 based on this operation signal to perform focus adjustment. When an illuminance adjustment operation is performed with the illumination lamp switch unit 71, the operation signal is given to the illuminance adjustment unit 73. The illuminance adjustment unit 73 adjusts the illuminance by adjusting the power supplied to the illuminating sphere 6 based on the operation signal.

The above is manual adjustment.
The automatic adjustment using the as a remote control device is performed based on the information detected by the light receiving sensor 4b. That is, as described above, the information regarding the change of the light collecting position includes the detection units X + (or X + ′), X− (or X− ′), and Y.
Each of the + (or Y + ') and Y- (or Y-') outputs is detected through the amplifiers 81 to 84 and the detectors 91 to 94.
And the CPU 7 is based on this information.
1, M2, M3 and clutches D1, D2 are controlled to change the condensing position.

Information about focus adjustment and illuminance adjustment is transmitted to the CPU 7 via the light receiving sensor 4b by modulating infrared rays, and the CPU 7 drives the motor M3 based on this information to perform focus adjustment. The illuminance adjustment unit 73 is contacted to adjust the illuminance. In addition,
In this embodiment, the method of controlling the focusing position by the reflected beam at the desired position of the subject has been shown. However, when there is no risk of secondary infection and there is no hindrance to the operation, it can be used as a beam irradiation means. It goes without saying that the light-collecting position can be controlled even if the light-emitting device is moved to a desired light-collecting position and the wave beam is directly emitted to the illumination lamp.

[0025]

According to the medical shadowless illumination device of the present invention, the beam focusing means is provided separately from the housing arranged above the operating table to indicate the focus position and the focus position. It is possible to accurately and automatically collect light at a desired position on the subject with no fear of secondary infection of the operation site.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a conventional lighting device.

2A and 2B are views showing a medical shadowless illumination device according to an embodiment of the present invention, in which FIG. 2A is a view showing components and FIG. 2B is a bottom view.

3A and 3B are diagrams showing a photodetector in the device shown in FIG. 2, in which FIG. 3A is a sectional view, FIG. 3B is a perspective view, and FIG.

FIG. 4 is a principle diagram of a condensing position changing operation in the apparatus shown in FIG.

5 is a block diagram showing a detailed configuration of the device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Illumination lamp 2 ... Subject 3 ... Light emitting device 4 ... Light receiving device 4a ... Imaging system 4b ... Light receiving sensor 5 ... Treatment part 6 ... Illuminating sphere 7 ... CPU 71 ... Illumination lamp switch unit 72 ... Manual focus adjustment unit 73 ... Illuminance adjustment unit 74 ... Power supply unit 81-84 ... Amplifier 91-94 ... Detector M1 , M2, M3 ... Motor D1, D2 ... Clutch

Claims (1)

[Scope of utility model registration request] 1. A housing arranged above an operating table, an illuminating sphere provided in the housing, and for converging illumination from the illuminating sphere at a predetermined position of a subject on the operating table. First, the light converging means provided in the housing and the housing is tilted so that the light converging position on the subject is at a desired position.
Drive means, a second drive means for moving the casing in the vertical direction in order to adjust the illumination state at the converging position on the subject, and a practitioner holding and operating the hand. Has a main body independent of the housing, can irradiate a desired position of the subject with a wave beam to form an irradiation area, and can perform a predetermined modulation on the wave beam to provide a case. Beam irradiating means having a function of giving information on the vertical position of the body, and an irradiation area of the irradiation area based on a reflected beam from the irradiation area on an imaging plane provided in the housing and inclined with the housing. The image forming means for forming an image is compared with the image forming position information by the image forming means and the position information indicating the condensing position, and when the two do not match, an output including information of the direction of the difference is output. The comparison means that occur and the output by the comparison means. The first control means for controlling the first driving means so that the condensing position moves in a direction in which the two coincide with each other, and the upper and lower sides of the casing included in the reflected beam from the irradiation area. Second control means for controlling the second drive means on the basis of information about the position;
A medical shadowless illumination device comprising: