JPH04124107U - ophthalmology equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To increase the information amount of imprint data without increasing the space occupied by the internal display of a fundus camera. [Structure] When the release switch (41) is pressed, the control unit (42) checks whether the film is in the first phase using the phase detection signal 1, opens the shutter (32), and opens the photographic illumination light source (14). ) and displays the contents of the imprint data on the internal display (22). Next, the motor (27) is driven by the phase detection signal 2 until the film reaches the second phase, and then stopped. Then, the shutter (32) is opened again, and the internal display (22) displays imprint data different from the previous imprint data and imprints. [Effect] Double the amount of data can be imprinted using one internal display.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to ophthalmological equipment used for observing the eyeball, such as a fundus camera, and in particular, This article concerns the data imprinting technology.

0002

[Conventional technology]

As a technology for data imprinting in conventional ophthalmological equipment, there is The fundus camera technology described in Japanese Patent No. 738 is known.

0003 This technology displays data entered using the 10 keys on an internal display. is projected onto film and imprinted on the data. Also, at this time, the user Therefore, the external display displays the same information as the internal display.

0004 FIG. 7 shows a film with data imprinted on it. In the figure, 70 is the fundus. This is the data in which 71 is imprinted on the photographed image.

[0005] Now, imprinting such data is done internally depending on the film winding phase. This is achieved by photographing the display with a camera.

[0006] As shown in Figure 2, such a camera uses a motor 27 to advance the film. A structure in which the proket 28 is rotated is generally used.

[0007] In addition, the film winding split 28 is usually equipped with a phase detector 31. It is provided. As shown in FIG. 8, the phase detector 31 has a conductive region 37 and a contact It consists of 33 and 34. A phase detector 31 is connected to the bottom of the sprocket, It rotates with the sprocket. Contacts 33 and 34 are connected via a conduction region 37 However, as the sprocket rotates, it becomes disconnected at a predetermined rotational phase. Therefore , by detecting this, a predetermined phase can be detected.

[0008] Next, the photographing operation will be explained in detail using the timing chart shown in Fig. 9. It will look like below.

[0009] That is, first, when the release switch (not shown) is pressed, the phase detection signal changes to an L-shape. Check the condition, and when it is in the L condition, open the shutter for a certain period of time and take a fundus image. For this purpose, the strobe 14 is activated and the shutter is closed. Note that the phase detection signal is When the contactors 33 and 34 are not connected, it is in the L state, and when the contacts 33 and 34 are connected, it is in the L state. It becomes H state.

0010 Now, while the shutter is open, the image of the internal data display 22 appears on the film. Imprinted in the photo.

[0011] Then drive the motor.

0012 When the motor 27 rotates the film winding sprocket 28, a phase detection signal is generated. signal goes to H level, and when the film is wound one frame, the phase detection signal goes to L level. fall to

[0013] It detects that the phase detection signal has fallen to L level and stops the motor.

[0014] On the other hand, if the film does not end after a certain period of time from the start of motor drive, Generates a film end check timing pulse to detect whether the At this point, check the phase detection signal.

[0015] A certain period of time means that one frame cannot be wound under any conditions, such as the type of film or the environmental temperature. Set the maximum time for

[0016] Normally, during this film end check, the phase detection signal is at L level, Indicates that one piece has been wound normally.

[0017] If the film has finished winding one frame, check the film end. At times, the phase detection signal remains at H level. In this case, stop the motor Do it like this.

[0018] When the film reaches the end, replace the film and press the release switch. Then, the phase detection signal remains at H level. In this case, the motor should be phase detected. The normal state can be achieved by driving the signal until it reaches L level. .

[0019] In the above manner, as previously shown in FIG. It was also captured on film.

[0020]

[Problem that the idea aims to solve]

By the way, ophthalmological equipment such as fundus cameras can be moved freely according to the movements of the eye being examined. It is desirable that the device be as small and lightweight as possible. Therefore, the built-in There is a limit to the space that can be occupied by the internal display.

[0021] Therefore, it is not possible to increase the number of digits of the internal display that can be built in, and the conventional However, the problem arises that it is not possible to increase the amount of imprint data sufficiently. I was there.

[0022] Therefore, this invention is an ophthalmological device that can imprint as much data as possible. The purpose is to provide

[0023]

[Means to solve problems]

In order to achieve the above object, the present invention provides an eyepiece equipped with a camera having an automatic frame advance mechanism. a data display means for displaying set imprint data on a medical device, and a data display means for displaying the set imprint data; Optical means for projecting the display image of the imprint data displayed on the display means onto the film surface Then, the automatic frame advance is performed so that the frame advance for one frame is divided into multiple film advances. The mechanism is controlled and different imprint data is transferred to the digital camera for each divided film feed. and control means for controlling the data to be set on the data display means and imprinted on the film. It is.

[0024] In addition, in this ophthalmological equipment, the automatic frame feeding mechanism is driven by a sprocket. Detects the rotation phase of the motor drive and the sprocket caused by the motor drive. and a phase detector, and the control means is configured to control the phase detector. Based on the detection results, the frame advance for one frame is divided into multiple film advances. The motor drive is controlled so that the film is fed at each divided time. set different imprint data on the data display means and imprint it on the film. It may also be possible to control the

[0025] Further, the control means displays the data display means for each divided film feed. Displays all different imprint data to be set and can be observed from outside the ophthalmological equipment It is desirable to have an external display means.

[0026]

[Effect]

According to the ophthalmological device according to the present invention, the control means controls the automatic frame advance mechanism of the camera. The frame advance for one frame is divided into multiple film advances, and Different imprint data is set on the data display means for each time the film is fed. to be determined. The data set in the data display means is displayed by the optical means. It is projected and imprinted onto the film.

[0027] As a result, the different imprint data displayed on the data display means are different from each other on the film. It will be imprinted in a different position.

[0028] Therefore, according to the present invention, even if an internal display with the same number of digits as the conventional one is used, the filter Since images can be imprinted multiple times on the image, the internal display of the fundus camera does not have a dedicated space. You can increase the amount of information in imprinted data without increasing the pace.

[0029] .

【Example】

Hereinafter, one embodiment of the ophthalmological device according to the present invention will be explained using an application to a fundus camera as an example. do.

[0030] First, FIG. 1 shows the configuration of the optical system of the fundus camera according to this embodiment.

[0031] As shown in the figure, the illumination system for observing the fundus F of the eye to be examined includes an objective lens 1, a hole Clear mirror 2, relay lens 10, ring diaphragm 11, fixed mirror 12, condenser lens It consists of a lens 13, a photography illumination light source 14, a condenser lens 15, and an observation illumination light source 16. will be accomplished.

[0032] Then, filters 18 for performing fluorescence photography or monochromatic light photography are inserted into the optical path. It is designed to be removable.

[0033] Now, when the observation illumination light source 16 is turned on, the light passes through the ring diaphragm 11 and then enters the hole. It is reflected by the mirror 2, passes through the objective lens 1, and is reflected near the cornea of the eye E. A ring-shaped secondary light source is formed to illuminate the fundus F of the eye to be examined.

[0034] When the photography illumination light source 14 emits light, the fundus F of the subject's eye is similarly exposed to strong light for a short period of time. It will be illuminated.

[0035] The observation and photography system for observing and photographing the fundus F of the eye to be examined includes an objective lens 1 and a focusing lens. 3, and a filter 17 for performing fluorescence photography can be inserted and removed from the optical path. It is provided. The illuminated image of the fundus F passes through the hole of the perforated mirror 2 and An object lens 1 and a focusing lens 3 form an image.

[0036] For observation, when the movable mirror 4 is in the position indicated by the solid line, the fixed mirror 7, eyepiece reticle 8, and eyepiece lens 9 are used for observation. The fundus image can be observed using the eyepiece tube.

[0037] For photographing, after moving the movable mirror 4 to the position indicated by the dotted line, the photographing illumination light source 14 is turned on. This is done according to the following.

[0038] The photographing optical path is divided into two optical paths by a movable mirror 5, and the photographing optical path is divided into two optical paths by a movable mirror 5. 1, a fundus image is recorded.

[0039] The data imprinting device transfers the image of the internal display 22 to a fixed mirror 23 and a relay lens 24. , the fixed mirror 25 allows the viewfinder reticle 8 or the film 6 or the film 21.

[0040] Next, the configuration of the camera 26 into which the film 6 and film 21 are loaded is shown. Shown in 2.

[0041] As shown in the figure, the camera 26 includes a sprocket 28 for winding the film; A motor 27 is a power source for film winding, a gear 29 for power transmission, and 30, has a phase detector 31 for detecting the phase of the film, and further includes a shutter -32.

[0042] In the camera 26, the shutter 32 and motor 27 are controlled from the outside. It is equipped with a control terminal, and can be controlled by a control section 42, which will be described later.

[0043] Further, the detection result of the phase detection plate 31 is outputted to the control section 42, which will be described later, through an output terminal. Powered.

[0044] The configuration of this phase detector 31 is shown in FIG.

[0045] As shown, phase detector 31 includes conductive regions 37 and 38 and contacts 33 , 34, 35, and 36.

[0046] The phase detector 31 is connected to the bottom of the sprocket and rotates together with the sprocket. do. The contacts 33 and 34 are connected via the conduction area 37, but the sprocket As it rotates, it becomes disconnected at a predetermined winding phase. Therefore, to detect this A predetermined phase can be detected by In addition, the contacts 35 and 36 are electrically conductive. The contacts 33 and 34 are connected through the region 38, but as the sprocket rotates, the contacts 33 and 34 The disconnection occurs at a predetermined winding phase different from the phase at which the disconnection occurs. Therefore, this A predetermined phase different from the phase detected by the contacts 33 and 34 is detected by detecting the The phase of can be detected. Therefore, in this example, the phase detector is Therefore, when the sprocket 28 rotates, that is, when feeding the film frame, two different positions are set. It is possible to detect the point in time when the phase is reached.

[0047] Hereinafter, the signals from contacts 33 and 34 will be referred to as phase detection signal 1, contacts 35 and 34. 36 will be referred to as phase detection signal 2. Note that the phase detection signal 1, Both phase detection signals 2 are in the L state when the contact is not connected, and when the contact is connected. The state becomes H state. In this embodiment, after the phase detection signal 1 is in the L state, a certain level is set. The phase detector 31 is configured so that the phase detection signal 2 is in the L state when the phase advances. .

[0048] Next, we will discuss the structure of the part related to the present invention in the control system of the fundus camera according to this embodiment. The configuration is shown in Figure 4.

[0049] In the figure, 41 is a release switch for instructing photography, 14 is a light source for photography, 42 is a control unit, which includes a release switch 41, phase detection signal 1 (33, 34), The phase detection signal 2 (35, 36) is received and processed, and the shutter 32, The motor 27, the photographing light source 14, and the internal display 22 are turned on at predetermined timings. Control.

[0050] The operation of data imprinting according to this embodiment will be explained below.

[0051] FIG. 5 shows the timing of the photographing operation.

[0052] First, all of the imprint data is displayed on an external display (not shown).

[0053] Next, as shown in the figure, when the release switch is pressed, the control unit 42 controls the phase Check the L state of the detection signal 1, and when it is in the L state, close the shutter 32 for a certain period of time. The shutter 32 is opened, the photographing illumination light source 14 is emitted for photographing the fundus image, and the shutter 32 is closed. Jiru.

[0054] Also, while the shutter is open, the internal display 22 and the external display display the Display the contents of half of the imprinted data, then press Film 6 or Film 6. Imprint on 21.

[0055] When the motor rotates the film winding sprocket 28, a phase detection signal is generated. 1 is H level. Then, when the film has moved a certain amount, a phase detection signal is generated. 2 falls from H level to L level.

[0056] Therefore, the control unit 42 detects this and temporarily stops the motor.

[0057] After that, the shutter 32 is opened again for a certain period of time, and the internal display 22 shows the external display. Of the imprint data displayed on the screen, the remaining data that was previously displayed on the internal display 2 display the contents and imprint it on film 6 or 21.

[0058] After that, the shutter 32 is closed again and the motor is driven.

[0059] As a result, the phase detection signal 2 changes from L level to H level.

[0060] Eventually, when the film is wound one frame, phase detection signal 1 drops to L level. . Therefore, the control unit 42 detects that the phase detection signal 1 has fallen to the L level, and Stop the motor.

[0061] On the other hand, after a certain period of time from the initial startup of the motor drive power supply, the film Film end check timing to detect whether it is not finished or not A pulse is generated and the phase detection signal 1 is checked at this point. What is a certain period of time? Set the maximum time for winding one frame under any conditions such as film type, environmental temperature, etc. do.

[0062] Normally, when checking the film end, phase detection signal 1 is at L level, and 1 Indicates that the piece has been successfully rolled up.

[0063] If the film ends without being wound one frame, when checking the film end In this case, phase detection signal 1 remains at H level, and in this case, the motor is driven and winding is performed. Raise it up.

[0064] Also, when the film reaches the end, you can replace the film and press the release switch. When pressed, phase detection signal 1 remains at H level. In this case the motor Normal shooting is possible by driving until phase detection signal 1 falls to L level. return to a normal state.

[0065] Through the above-described operation, as shown in FIG. , it becomes possible to imprint twice the amount of data.

[0066] In this example, the winding phase of the sprocket is detected. We then detected the amount of film feed and imprinted the second data, but each If the timing of the motion is known, film advance can be determined by timing alone. Alternatively, the amount of water may be determined. It is also possible to detect the motor phase or directly This may be done by detecting the feed amount of the lum.

[0067] Further, in this embodiment, one internal display 22 is used, and the internal display 22 I will explain an example of imprinting twice the amount of data that can be displayed at once on the screen. Ta. However, by detecting a further different phase, the same process as the second data imprinting is performed. You can repeat the operation to imprint an arbitrary multiple of the amount of data. stomach.

[0068] In addition, in this embodiment, the film is moved by opening and closing the shutter 32. The internal display turns on and off when the shutter is open. This objective may be achieved by controlling the

[0069] As described above, according to this embodiment, an internal display with the same number of digits as the conventional display is used, and Since images can be printed multiple times on the film, the internal display of the fundus camera is not occupied. You can increase the amount of information in the imprinted data without increasing the space available for imprinting. Wear.

[0070]

[Effect of the idea]

As described above, according to the present invention, it is possible to imprint as much data as possible. We can provide ophthalmological equipment that can

[Brief explanation of drawings]

FIG. 1 is an optical path diagram showing the configuration of an optical system of a fundus camera according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a fundus camera according to an embodiment of the present invention.

FIG. 3 is a block diagram showing the configuration of a phase detector of a fundus camera according to an embodiment of the present invention.

FIG. 4 is a block diagram showing the configuration of parts related to the present invention of a control system of a fundus camera according to an embodiment of the present invention.

FIG. 5 is a timing chart showing the photographing operation of the fundus camera according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram showing the results of imaging by a fundus camera according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram showing the results of imaging by a conventional fundus camera.

FIG. 8 is an explanatory diagram showing the configuration of a phase detector of a conventional fundus camera.

FIG. 9 is a timing chart showing the photographing operation of a conventional fundus camera.

[Explanation of symbols]

14 Light source for photography 22 Internal display 23 Fixed mirror 24 Relay lens 25 Fixed mirror 27 Motor 28 Sprocket 31 Phase detector 32 Shutter 37, 38 Conduction area 35, 36 Contact 37, 38 Contactor 41 Release switch 42 Control section

Claims (3)

[Scope of utility model registration request] 1. An ophthalmological instrument comprising a camera having an automatic frame advance mechanism, comprising a data display means for displaying set imprint data, and a display image of the imprint data displayed on the data display means. An optical means for projecting images onto a film surface and an automatic frame feeding mechanism are controlled so that one frame's worth of frame feeding is divided into multiple film feedings, and different imprint data is transferred to the film for each divided film feeding. 1. An ophthalmological device comprising: a control means for controlling data display means to be set and imprinted on a film. 2. The ophthalmological equipment according to claim 1, wherein the automatic frame feeding mechanism includes a motor drive for driving a sprocket and a phase detector for detecting a phase of rotation of the sprocket by the motor drive. The control means controls the motor drive so that frame advance for one frame is divided into a plurality of film advances based on the detection result of the phase detector, and . An ophthalmological device, wherein different imprint data is set on the data display means and controlled to be imprinted on the film for each divided film feed. 3. The ophthalmological equipment according to claim 1 or 2, wherein the control means displays all of the different imprint data set on the data display means for each divided film advance. An ophthalmological device characterized by being equipped with an external display means that can be observed from the outside.