JPS5875534A - Controller of eye bottom camera - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a book mainly related to a control device for the amount of light from a photographing strobe for a fundus camera.

Conventionally, there are mainly 35111 and instant cameras as cameras used for fundus photography with fundus cameras.In addition to the 35111 and instant cameras, the photoreceptor for each film has different magnifications for black and white and color, and depending on these various shooting conditions, -Reflected light The amount of light from the strobe tube used to photograph the fundus, which is particularly difficult to photograph due to its small amount of light, varies slightly. In particular, there was a drawback in that it was difficult to reproduce the images, which affected accurate comparative examination of symptoms.

An object of the present invention is to eliminate all of the above-mentioned drawbacks of the conventional art by providing a control device for a fundus camera that can appropriately set the amount of light from a strobe tube when photographing the fundus without relying on intuition.

Next, the configuration of an embodiment of the present invention will be explained with reference to FIGS. 1 to 6.

Fig. 1 consists of an illumination system 1, a photographing system and an inspection system 2, and the photographing system includes a camera pack 65, a camera pack 3, and an instant camera pack 4.
This is a drawing showing the mechanical structure of the illumination system device 1, in which the observation light from the illumination lamp 6 forming the illumination system device 1 is transmitted through a first condenser lens 7, a second condenser lens ''8, a prism 9, a ring slit 10, and a third condenser lens. 3 condenser lens 11, 4th condenser lens 12, Kongming Ichi 13, and objective lens 14, the warm bulb 150IIs11 surface K11ll is emitted, and the observation light emitted from the observation light is sent to the objective lens forming the observation and photographing system 2. Lens 14, Komei Mitsu-13, focus ring lens 16, imaging lens 17, optical path switching mechanism 18 (see specification of Utility Model Application No. 186004/1983 filed by the applicant of the present application) -19 , first fixed t'y-
It is magnified and observed through the eyepiece 22 of the 17477 section 21 from 'zo.

In this observation state, when the later-described 35-/instant changeover switch is set to 35wll11, V
Yay! - When the relay contact 24t is turned on via the switch 23, the first V-type solenoid 25 is activated to rotate the first movable mirror 19 to the position indicated by the two-dot chain line in FIG. This causes the strobe lamp 27 of the lighting system 1 to flash.

The light reflected from the fundus due to flash illumination is reflected by the imaging lens 1.
An image is formed on the film 28 side H of the 35ff camera pack 3 from 7, and in the same way, instant triggering is performed by pulling the instant lid in state 9, where the 35 cod/instant changeover switch (described later) is switched to instant viewing in the observation state. Relay contact 2 is activated by turning on the lid detection switch 290.
4, the first and second V Yatta solenoids 2
5.30 - First and second movable mirror 19,3 by actuation
1 to the position indicated by the two-dot chain line in FIG.
From the second movable Mi? -31, condenser lens 62, second
The image is formed on the instant film 54 of the instant camera pack 4 via the fixed Mihoo 63.

Note that the fundus camera 5 includes a variable magnification lens switching detection switch 35 that can be switched in response to switching the magnification, a lamp 66 for imprinting data during shooting, and a timer counter that displays the number of shots or the elapsed time after the start of shooting as data. 37
, a start/stop switch 38 that is operated in response to the start/stop of the timer counter 37;
, a shutter switch 59 that corresponds to fluorescent photography and is operated when setting nine filters, a setter switch 23, a shutter switch 40 for remote control operation using a foot that corresponds to start/stop, and a start/stop switch. push switches 41 are provided.

Next, FIG. 2 is a view of the operation panel 42 of the @bottom camera 5, and the operation panel 42 has the timer counter 57 as data for imprinting on the 35-inch film 28.
A timer switch 43 that switches to a timer during fluorescent photography and a counter for the number of shots for other types of photography, and a timer switch 43 that changes the light intensity of the data imprinting lamp 36 from LOW to HI in accordance with the sensitivity of the film 28.
Switch to GH and lamp 36'1k when not in use
A data lamp switch 44 that turns off/off', a camera selection switch 45 that changes depending on whether the shooting is 351111 or instant shooting, an alarm lamp 46 that lights up especially when there is an abnormality in the high voltage circuit, and a charge lamp 47 that lights up when the flash capacitor is charged. , a power indicator lamp 48 that lights up when the power to the fundus camera 5 is turned on, and @
A power switch 49 that is operated when the power to the bottom camera 5 is 0N-OF'l', a sensitivity selection dial 50 that adjusts the dial to the sensitivity position of the filter A28' when using the 35m1 power filter 5, and the light intensity of the observation volume lamp 6. A lamp light intensity adjustment dial 51 for manually adjusting the flash intensity of the strobe lamp 27, and a film 28 for each camera to adjust the flash intensity of the strobe lamp 27.
Selection switch by camera mode to match 34, i.e. MANtlAL 52, C0LORJPFORIN
STANT53, FLUO54,65■C0LOR55
And when selecting camera mode MANLIAL52, that is,
A flash light intensity setting dial 56 for manually setting the flash light intensity of the strobe lamp 27 when using instant and 35111 black and white films, or when using a film with a sensitivity other than that selected by the sensitivity selection dial 50.
and each are installed.

Next, FIG. 3 is an electrical system diagram of the fundus camera 5, and when the power switch 49 is turned on, the high voltage output from the F lance 57 is connected to the high voltage control switch 58, the rectifier circuit 59, and the high voltage stabilizing power circuit 60. The electrolytic capacitor charging energy in the switching circuit 61 is supplied to the strobe lamp 27 when the synchro switch 260 is turned on, and the Vx light amount switching circuit 61 In addition to controlling the charging of the electrolytic capacitor by the high voltage stabilizing power supply circuit 60 in the state detected via the high voltage detection circuit 62, the output is also sent to an alarm relay via the load detection circuit 63 and overvoltage detection circuit 64, respectively. The drive circuit 65 is activated to light the alarm lamp 46 and turn off the high voltage control switch 58.

In addition, the low voltage output from the transformer 57 is supplied to the power terminals of each electric circuit via a rectifier circuit 66 and a stabilized power supply circuit 67, as well as to a fan motor 68 and a film winding motor 6.
9. Film automatic feeding circuit 70 and LE as a fixation light
The low voltage output from the transformer 57 is also supplied to the data imprinting lamp 66 via the data lamp switch 44 in the camera mode MANUAL52i1 fixed time and the light amount switching circuit 72 controlled by the logic circuit described later. The output from the transformer 57 is supplied to the observation illumination lamp 6 via a lamp light intensity adjustment dial 51 and a dimming circuit 73 controlled by a logic circuit described below, as well as to a foot indicator lamp 74 and an Il bottom camera 5.
is supplied to a lowering motor 76 that moves the mount 75 downward E with respect to the frame 75 via a foot-operated UP switch 77 and a DOWN switch 78, respectively.

Also, a flash light intensity setting dial 56, a camera selection switch 45, a sensitivity selection dial A150, each camera mode selection switch 52 to 55, and a variable magnification lens changeover detection switch 3.
5 and the filter detection switch 39 are input to a logic circuit 79, and the logic circuit 79 outputs an observation illumination lamp 6, an I-amp 56 for image projection, and a strobe light in accordance with each input value. A rounded output signal for setting the light intensity of each lamp 27 to the optimum value is inputted to the flash light intensity switching circuit 61 via the chest circuit 76, the light intensity switching circuit 72, and the relay drive circuit 80, and the output signal is inputted to each lamp 6. .56.27, and set the clock pulse generation oscillator 81, timer counter changeover switch 43. Output from counter 82 with star)/stop switch 38 and 41 connected to the input terminal
,? The timer for data imprinting from the timer 83 and the call I drive circuit 84! 37, and the output from the one-seat multi 83 via the gate circuit 85 and the output from the one-seat multi 86 which inputs the output from 40 to each V-yatter switch 2 are relay drive circuits) 55m1 via a mirror solenoid drive circuit 88 along with the output from said logic circuit 79 via 17.
/lN5TANT switching relay circuit 89, and the output from the relay circuit 89 selects and energizes the first shutter solenoid 25 for 35 and the second shutter solenoid 30 for instant, and , 35 camera puff 5 is attached with a film winding OK switch 90 which turns off when the film 28 is finished and locks the function of the α-yutter switch 23 after the film 28 is finished.

Next, the operation of this embodiment will be explained.

First, when performing normal photography with the 35111 camera pack 6 while observing the fundus of the examinee, after turning on the power switch 49, press the camera mode selection switch 35swcOLOR.
55 is turned on KL, the sensitivity selection dial 50 is set to the sensitivity of the cuboid film 28, and the variable magnification lens changeover detection switch 65 is switched to the position corresponding to the magnification. Charging starts with the flash energy WSK corresponding to the magnification and film sensitivity AHA and DIH shown in Figure 4.
The internal circuit of the timer counter 37 is switched to either R, OV-U or GH according to the 8W & degree, and the observation illumination lamp 6 is also set to an appropriate light intensity corresponding to the magnification. Regardless of the switching position of the switch 45, the counter 82 is automatically switched to the counter side by human power from the logic circuit 79.

Therefore, the observer should adjust the tlP to the position of the subject's chin.
In addition to being able to conduct a limited observation of the subject by simply operating the Do-Man switches 77 and 78, there is also a lamp light intensity adjustment dial that allows you to switch the light intensity of the illumination lamp 6 to manual operation (not shown) if necessary. 51 can be set to +ms arbitrarily while observing.If you press the shutter switch 23 in your hand or the shutter switch 40 under your feet in the normal observation state, the first shutter speed L// The first movable i'p~ due to the operation of the id 25
19, the reflected light from the fundus of the eye enters the film 2811 of the camera pack 5 through the eyepiece 22 axis, and the strobe is turned on by the synchronization switch 260 turned on by the rotation of the first movable mirror 19. The flashing operation of the lamp 27 at the optimum light intensity completes the photographing, and the first movable mirror 19 returns to the solid line position in FIG. - By rotating the top winding E, all photographing operations by operating the shutter switch 23 or 40 are completed, and the fundus camera 5 returns to its original observation state.

When the shutter switch 26 or the mechanism 40 is pressed again in this return state Wl, the same photographing operation as described above is repeated, and the number of photographed images is determined by adding 1 to the preset value set by the data imprinting lamp 36.
The edge Kl of the film 28 [is then imprinted.

Next, when injecting a fluorescent dye into one subject and observing the blood circulation dynamics at the fundus of the subject, when photographing the bottom using a 35fi camera part 3, the fluorescent dye is injected into the fundus camera "Y5". With the photographic filter 91 inserted and the filter detection switch 39 turned on, the power switch 49 is turned on, the camera mode selection switch 54 is turned on, and the variable magnification lens changeover detection switch 35 is set to correspond to the magnification. When it is switched to the position, the electrolytic capacitor of the flash light amount switching circuit 61 is switched in a state corresponding to the flash energy W8 corresponding to the magnification shown in FIG. 5, since the film 28 is specified as a high-sensitivity film. Charging is started, the internal circuit of the timer counter 37 is automatically switched to the timer side regardless of the switching position of the timer counter changeover switch 43, and the data imprinting lamp 36 is also switched to "Loll" in response to the high sensitivity of the film 28. The observation illumination lamp 64 is set at an appropriate light intensity corresponding to the observation of blood circulation dynamics using fluorescent dye and the magnification.

Therefore, the observer should adjust the position of the subject's chin to
In addition to being able to perform bottom observation of the subject by simply operating the P and DOWN switches 77 and 78, observation can also be performed by arbitrarily adjusting the light intensity of the illumination lamp 6 via the lamp light intensity adjustment dial 51, as described above. In this observation state, if you press the timer start/stop switch 38. When you press 40,
The olfactory fundus along with the count value of the timer counter 37 at this time point 01271 is photographed on the 351m film 28 in the same manner as described above, and by pressing the timer start/stop switch 38.41 again, the timer counter 3
The counting operation of 7 stops.・Secondly, if you want to take instant color photography with the instant camera pack 4 while observing the fundus of the examinee, after turning on the power switch 49,
Camera mode selection switch C0LOR△FOR△l
When the N5TANT 53 is turned on and the variable magnification lens changeover detection switch 55 is switched to the position corresponding to the magnification, the electrolytic capacitor of the flash light amount changeover circuit 61 is activated as shown in FIG. 6 because the sensitivity of the instant film 54 has been specified. Flash energy 13 corresponding to the magnification shown in
Charging is started in a state in which the timer counter 37 is switched in accordance with the instant film 64.
Since there is no room for data imprinting, the observation illumination lamp 641 is automatically turned off and set to an appropriate light intensity corresponding to the magnification of the observation illumination lamp 641.

Therefore, the observer can observe the fundus during the above-mentioned period, and when the instant 4 tube is pulled in this observation state and the detection switch 29 is turned on, one v loft ma~+8
6'l'? 111.12 Shutter solenoid 25
．． 30 operates, the first and second movable guests'p-1
9 and 31 in FIG. 1, the reflected light from the bottom a enters the instant film 34 side of the instant camera pack 4 from the eyepiece 22, and
Synchro switch 26 by first movable s'9-19 rotation
When 0 is turned on, the strobe lamp 27 performs a fluff V operation at the optimum light intensity, and photography is completed, and the first and second V guys! - The first and second movable mirrors 19. by blocking the solenoid 25.30. ．． 51, all the photographing operations are completed and the fundus camera 5 returns to the original observation state by returning to the position indicated by the solid line in FIG. be fed.

Next, 350 color film, 351111 black and white film with a sensitivity not selected by the sensitivity selection dial 50,
When shooting with black and white instant film, the logic corresponding to each film is not built into the logic circuit 79, so MA is set on the camera mode selection switch.
When NUAL 52 is selected and in good condition, the data timer counter changeover switch 43J' data imprinting lamp 66 Koryu's data hump switch 44.35 Camera selection switch 45 for switching between MII shooting and instant shooting corresponds to each film. This is done by pressing the shutter switch 23, 40 at the bottom of the hand or foot with the flash light amount setting dial 56 setting the light amount of the strobe lamp 27 corresponding to each film sensitivity.

Next, FIG. 7 shows another embodiment of the present invention.
∎ When performing photography using either black-and-white film or black-and-white film, or by camera type, Fig. 7 (a) shows how to select cameras 93 and 94 as desired by moving the slider 92 left and right, and the limit switch 95.
．． The light amount cape of the strobe lamp 270 is automatically set by checking the setting camera 93 or 94 using the setting camera 96, and the slider 92 on the treetop is rotated by the turret plate 97. , also, Figure 7 (c)
Company Figure 7 (4') Added K instant camera 98,
Figure 7) is the instant Y camera 98 shown in Figure 7 (-).
Except for the addition of extra features, the configuration, operation, and effects are the same as those of the previous embodiment.

In addition, the instant camera 94.9 in each of the above embodiments
Of course, 8 can be any other camera.

Next, FIG. 8 is a block diagram of an electronic control circuit of another embodiment of the present invention, in which the electronic control circuit includes, for example, an 8-bit microcomputer 99 and the computer 9.
a power supply circuit 100 for supplying power to the retinal camera 9; and a drive circuit 10 for driving the various adjustment mechanisms of the fundus camera 58, solenoids 25, 311, motors 68, 69, 76, etc.
1, a drive control circuit 102 for controlling the drive circuit 101, and an operation panel 42 for setting the control contents of the fundus camera 5. 1tgcpu 10
4. Other than the configuration of the data storage circuit RAM 105, program storage circuit ROM 106, input control circuits 107, 108, and output control circuit 109, the substantial structure, operation, and effect are almost the same as those of the previous embodiment. .

In addition, in the figure, the same reference numerals are given to circuit elements and the like that are equivalent to those in the above embodiment.

Next, the effects of the present invention will be explained.

The first invention is a fundus camera that is equipped with a plurality of cameras and that observes and photographs the fundus of an examinee. The control device of the I&J IE camera automatically sets the value to an appropriate value corresponding to the type of photoreceptor and the photographing magnification.

Optimum photography can be performed simply by pressing the shutter switch without having to worry about anything, and since there is no unevenness in photography including reproducibility, there are effects such as improved reliability in comparative judgments based on the photography results.

Next, the second invention is a bottom camera device that is equipped with a plurality of cameras and that performs meditation IEO observation and photography of a subject, in which the plurality of cameras are connected to the shooting position of the bottom camera. It is provided so that the positioning can be exchanged in a horizontal or vertical slide type, and the input information from the positioning exchange corresponding to the type of photoconductor for each camera and the magnification setting input information corresponding to the photographing magnification are used. The control device of the bottom camera automatically sets the light intensity of the photographing strobe to an appropriate value corresponding to the type of photoreceptor and the photographing magnification.

As a result, an effect equivalent to that of the first invention of the present invention can be obtained, in which case the examinee can immediately use an appropriate frame according to the observation condition in the 9th condition, but 4. This has the effect of allowing fundus imaging to be performed at the optimal imaging time without having to apply additional time.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the mechanism of one embodiment of the present invention, Fig. 2 is a diagram of its operation panel 42, Fig. 5 is its electrical system diagram, Figs. 7(a) to 7) are explanations of main parts of another embodiment of the present invention. FIG. 8 is a block diagram of an electronic control circuit of another embodiment of the present invention. 1...Illumination system device I 2...Photography and observation system 3...35w11 camera bag 4...
・Polaroid Camera Pack 5...@Takumi Camera
6...Illumination lamp 18...-light path switching mechanism 1
9...First movable mirror 25...First shutter solenoid 27...-Strobe lamp 28...Film 30...Second shutter solenoid 51...Second movable@mirror 34... Instant film 35...variable lens switching detection switch 50
-...Sensitivity selection dial 60...High voltage stabilization power supply circuit 61...Flash light intensity switching circuit 79...
Logic circuit 88...(F-Solenoid drive circuit 89-35■/POL A switching relay circuit 91 River slide f" 93.94...Camera 97...
・I left board applicant Kowa Co., Ltd. agent Patent attorney Oka 1) Hidehiko

Claims (2)

[Claims] (1) Equipped with multiple cameras and
In the fundus camera that observes and photographs the fundus, the light intensity of the fundus photographing robot is set to an appropriate value according to the type of photoconductor and the magnification according to the input information corresponding to the type of photoconductor and the magnification of the fundus. A control device for a fundus camera, which is characterized by automatically setting. (2) In a fundus camera that is equipped with a plurality of cameras and which observes and photographs the fundus of the subject, the plurality of cameras are placed at the photographing position of the fundus camera! -Lev F
Or, it is provided so that it can be positioned and replaced in a sphoid style, and
According to the type of photoconductor for each camera KM, the light intensity of @bottom photography a) is adjusted to the type of photoconductor and the magnification according to the input information from the above-mentioned positioning exchange and the input information of the magnification setting corresponding to the photographing magnification. A control device for a fundus camera characterized by automatically setting a corresponding appropriate value.