JPH07303612A - Ophthalmologic photography apparatus - Google Patents

Abstract

PURPOSE:To enable observing and recording of an animated image of an examined eye and recording of a high-quality still picture. CONSTITUTION:In recording an animated image, when a control circuit connects the output of a television camera 7 with a television monitor 8 and an animated image recording means and lights a continuous lighting source 12, the eyeground Er of the examined eye E illuminated by the continuous lighting source 12 is picked up by the television camera 7, a video signal from the television camera 7 is outputted to the television monitor 8 and the animated image recording means, respectively, to be projected on the television monitor 8 as an animated image and stored in the animated image recording means. Also. by pressing a photographing button, the control circuit shuts off the signal to the television monitor 8 and the animated image recording means, radiates a flashlight source 10, takes the video signal of the television camera 7 into the still picture recording means, and records the still eyeground image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic photographing apparatus used in an ophthalmologic clinic or the like.

[0002]

2. Description of the Related Art A conventional fundus camera records a fundus image on a film by emitting light from a strobe light source. In a fundus camera equipped with a television camera, alignment is performed while observing a fundus moving image on a television monitor, and a strobe light source is emitted to record a fundus image as a still image on a still video.

[0003]

However, since the conventional fundus camera records a still image, the dynamic characteristics of the fundus of the eye to be examined cannot be diagnosed. Further, since the fundus image is recorded on the film, it is inconvenient that the fundus image cannot be confirmed immediately after photographing.

On the other hand, by recording the fundus image on the still video, it is possible to immediately reproduce and confirm the fundus image. However, since the characteristics of the television camera are matched with the light amount of the lamp light source for observing a moving image, if a still image is recorded by a strobe light source having a light amount larger than that of the lamp light source for observation, it will be overexposed. Furthermore,
Since the screen of the TV monitor is temporarily brightened by the strobe light source at the time of shooting, it imposes a burden on the dark-adapted optometry.

The object of the present invention is to solve the above problems,
An object of the present invention is to provide an ophthalmologic imaging apparatus that enables observation and recording of a moving image of an eye to be inspected, and recording and still reproducing a high-quality still image.

[0006]

An ophthalmic photographing apparatus according to a first aspect of the present invention for achieving the above object is a continuous lighting light source for photographing a moving image, which illuminates an eye to be inspected, a flash light source for photographing a still image, and a television camera photographing. Means, moving image display or storage means for displaying or recording moving images, still image recording means, and a switch circuit for connecting the output of the television camera photographing means to the moving image display or storage means, The switch circuit is turned off when the flash light source for still image shooting emits light.

The ophthalmologic image taking apparatus according to the second aspect of the present invention is a moving image continuously lighting light source for illuminating an eye to be inspected, a flash light source for still image photographing, a television camera photographing means, and a moving image displaying or recording a moving image. In an ophthalmologic imaging apparatus having image display or storage means and still image recording means, the television camera imaging means has gain changing means, and the gain changing means is the television when the flash light source for still image shooting emits light. It is characterized in that the gain of the output signal is changed with respect to the amount of light incident on the imaging means.

[0008]

In the ophthalmologic photographing apparatus according to the first aspect of the present invention having the above-mentioned structure, when the flash light source for still image photographing emits light, the switch circuit is turned off and the image signal from the television image pickup means is displayed on the moving image display or storage means. Do not enter.

Further, in the ophthalmic photographing apparatus according to the second aspect of the present invention, the gain changing means reduces the gain of the output signal with respect to the incident light quantity to the television camera image pickup means when the flash light source for still image photographing emits light. S / N of output signal from
Improve the ratio.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the illustrated embodiments. FIG. 1 is an optical layout diagram of the fundus camera of the embodiment,
On the optical path O1 behind the objective lens 1 facing the eye E to be inspected, a perforated mirror 2, an imaging lens 3, a flip-up mirror 4 and a film 5 are sequentially arranged, and a reflection direction of the flip-up mirror 4 is arranged. The relay lens 6 and the television camera 7 are arranged on the optical path O2 of the above, and the output of the television camera 7 is connected to the television monitor 8. Furthermore, on the optical path O3 in the incident direction of the perforated mirror 2, a moving image of a flash light source 10, a lens 11, an incandescent lamp light source, etc. for observing and recording a still image of the lens 9, strobe light source, etc. is observed and recorded. The continuous lighting light sources 12 for performing the operation are sequentially arranged.

FIG. 2 is a block circuit diagram of the control unit for controlling the display and recording of the fundus image.
The output of the photographing button 22 provided on the operating stick is connected, and the output of the control circuit 21 is connected to the flash light source 10, the still image recording means 23 such as a still video, and the switch circuit 24, respectively. Further, of the two outputs of the television camera 7, one is connected to the still image recording means 23, and the other is connected to the moving image recording means 25 such as the television monitor 8 and the VTR via the switch circuit 24. . The switch circuit 24 is preferably composed of an electronic circuit.

When recording a moving image, the control circuit 21 outputs a control signal to the switch circuit 24, and the television camera 7
The output of is connected to the television monitor 8 and the moving image recording means 25, and the continuous light source 12 is turned on. The light flux emitted from the continuous lighting light source 12 forms an image near the flash light source 10 for still image shooting by the lens 11, passes through the lens 9, is reflected by the perforated mirror 2, passes through the objective lens 1, and passes through the objective lens 1. Fundus
Illuminate Er.

The reflected light beam from the fundus Er returns through the same optical path, passes through the aperture of the perforated mirror 2, the imaging lens 3, is reflected by the flip-up mirror 4, passes through the relay lens 6, and the fundus image Pr.
Is captured by the television camera 7. The video signal from the television camera 7 is output to the television monitor 8 and the moving image recording means 25 via the switch circuit 24, and is observed as a moving image on the television monitor 8. After performing the predetermined alignment, the examiner presses the recording button of the moving image recording means 25 to record the fundus image Pr.

When recording a still image, the film 5 or the still image recording means 23 is used as a recording medium. The examiner selects a recording medium and presses the photographing button 22 to cause the flash light source 10 to emit light. When the film 5 is selected, when the photographing button 22 is pressed, the control circuit 21 retracts the flip-up mirror 4 from the optical path O1 in synchronization with the light emission of the flash light source 10, and records the fundus image Pr on the film 5.

Further, when the still picture recording means 23 is selected, when the photographing button 22 is pressed, the control circuit 21 outputs a control signal to the switch circuit 24 to turn off the switch circuit 24 and the television monitor. 8. The signal to the moving image recording means 25 is cut off. Then, in synchronization with the light emission of the flash light source 10, a capture start signal is output to the still image recording means 23. When the still image recording means 23 detects this signal, it captures the video signal of the television camera 7 and records the still fundus image Pr.

FIG. 3 is a block circuit configuration diagram of a modified example of the control unit of FIG. 2, in which the output of the photographing button 22 provided on the operating rod is connected to the control circuit 31, and the output of the control circuit 31 is:
The flash light source 10, the television camera 7, the switch circuit 32, and the still image recording means 23 such as a still video are respectively connected. The output of the television camera 7 is output via the switch circuit 32 to the still image recording means 23 and the moving image recording means 2.
5 and the TV monitor 8 respectively. In addition,
The television camera 7 is controlled by the control circuit 31 by a built-in electronic shutter unit, a signal amplification degree adjusting unit, or the like.
The gain of the output signal with respect to the amount of incident light is adjusted.

When observing and recording a moving image, the control circuit 31 connects the switch circuit 32 to the contact M, lights the continuously lit light source 12 to illuminate the fundus Er of the eye E, and displays the fundus image on the television. The image is taken by the camera 7. Video signals from the television camera 7 are output to the moving image recording means 25 and the television monitor 8, respectively, and the fundus moving image is displayed on the television monitor 8 and recorded in the moving image recording means 25. While observing the television monitor 8, the examiner presses the photographing button 22 to record a still fundus image after aligning and focusing the fundus image.

When a signal is input from the photographing button 22, the control circuit 31 switches the connection of the switch circuit 32 to the contact S,
The output of the television camera 7 is cut off from the moving image recording means 25 and the television monitor 8 and connected to the still image recording means 23, and at the same time, the gain of the television camera 7 is increased by the amount of increase in the light amount of the flash light source 10 as compared with the time of recording the moving image. Reduce by the amount. This makes it possible to obtain a fundus image with proper exposure even with strong light from the flash light source 10. Then, the control circuit 31 controls the flash light source 1
A recording start signal is output to the still image recording means 23 in synchronization with the light emission of 0. Upon detecting this signal, the still image recording means records the video signal from the television camera 7. When the eye fundus image is recorded for one frame, the control circuit 31 increases the gain of the television camera 7 to return it to the moving image recording state by the continuous lighting light source, and at the same time, switches the connection of the switch circuit 32 to the contact M, and the television camera. The output of 7 is the moving image recording means 2
5 and the television monitor 8 to make a moving image observation and recording state.

[0019]

As described above, in the ophthalmic photographing apparatus according to the first aspect of the present invention, the switch circuit is turned off to prevent the bright light image of the eye to be inspected by the flash light source when the flash light source for still image light emission is emitted. Since the display screen does not become bright temporarily and the image of the eye to be inspected can always be observed with a constant brightness, it does not impose a burden on the dark adapted eye.

Further, in the ophthalmologic image taking apparatus according to the second aspect of the present invention, the gain of the television camera image pickup means is reduced by the amount of increase in the light amount of the flash light source when recording a still moving image, compared to when recording a moving image. It is possible to record a high-quality still image with an improved N ratio.

[Brief description of drawings]

FIG. 1 is an optical layout diagram of an example.

FIG. 2 is a block circuit configuration diagram of a control unit.

FIG. 3 is a block circuit configuration diagram of a modified example of the control unit.

[Explanation of symbols]

 5 film 7 TV camera 8 TV monitor 10 flash light source 12 continuous lighting light source 21, 31 control circuit 22 shooting button 23 still image recording means 24, 32 switch circuit 25 moving image recording means

Claims (2)

[Claims] 1. A continuous lighting light source for moving image shooting for illuminating an eye to be examined, a flash light source for still image shooting, a television camera shooting means, a moving image display or storage means for displaying or recording a moving image, and a still image recording. Means, and a switch circuit for connecting the output of the television camera photographing means to the moving image display or storage means, when the flash light source for still image photographing emits light,
An ophthalmologic photographing apparatus, characterized in that the switch circuit is turned off. 2. A continuous lighting light source for moving image shooting for illuminating an eye to be examined, a flash light source for still image shooting, a television camera shooting means, a moving image display or storage means for displaying or recording a moving image, and a still image recording. In the ophthalmologic imaging device having means, the television camera imaging means has gain changing means,
The ophthalmologic photographing apparatus, wherein the gain changing means changes the gain of the output signal with respect to the amount of light incident on the television image pickup means when the flash light source for still image shooting emits light.