JPH03261450A - Examined eye photographing device - Google Patents

Abstract

PURPOSE:To avoid a fact that a hindrance is generated in photographing by providing a light emission inhibiting means for inhibiting a light emission of an electronic flash even if a photographing switch is operated in the course of instantaneous reproduction of an examined eye photographing image. CONSTITUTION:An image recording apparatus part 2 is provided with an instantaneous reproducing circuit 9, and when an image recording circuit 8 is in a turn-on state, the instantaneous reproducing circuit 9 outputs an instantaneous reproducing image signal to an image switching circuit 5. An examined eye photographing device main body 1 is provided with an electronic flash light emission control circuit 10, and a latch circuit 11 being an electronic flash light emission inhibiting means. As for the latch circuit 11, by turn-on/turn-off of a photographing switch 12, a high level and a low level are repeated. The electronic flash light emission control circuit 10 permits an electronic flash light emission, when the photographing switch 12 is operated at the time when the latch circuit 11 is in a low level, and inhibits the electronic flash light emission, when the photographing switch 12 is operated at the time when the latch 11 is in a high level. Accordingly, when the latch circuit 11 is in a low level, when the photographing switch 12 is turned on, the latch circuit 11 becomes a high level, the electronic flash light emission control circuit 10 outputs an electronic flash light emission signal, and an electronic flash is subjected to light emission.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides an eye to be examined which can instantaneously reproduce a photographed image of the eye to be examined by emitting a strobe based on the operation of a photographing switch, and display the instantaneous reproduced image. Regarding photography equipment.

(Prior art) Conventionally, a strobe is emitted based on the operation of a photographing switch, an image of the eye to be examined is recorded in the bud of an image recorder, this image of the eye to be examined is instantaneously reproduced, and the instantaneous reproduced image is recorded as an image. 2. Description of the Related Art A fundus camera is known as an eye photographing device capable of displaying images on a display means.

According to this type of eye photographing device, when photographing is performed, the fundus photographed image as the photographed image of the subject's eye continues to be displayed on the image display means for a predetermined period of time. This has the advantage of giving you more time to carefully consider the image.

(Problem to be Solved by the Invention) However, in the conventional eye photographing device, if the photographing switch is accidentally operated during instantaneous playback of the photographed image of the patient's eye, the strobe may erroneously fire, causing damage to the patient's eye. Otherwise, an unintended photographed image of the eye to be examined may be recorded and instantaneously reproduced, which may impede smooth imaging of the eye to be examined.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an eye photographing device that can prevent strobe light emission even if the photographing switch is erroneously operated during instantaneous regeneration of the eye to be examined, thereby avoiding trouble in photographing. .

(Means for Solving the Problems) In order to achieve the above-mentioned object, the subject eye photographing device according to the present invention provides a light emitting device that prohibits strobe light emission even if the photographing switch is operated during instantaneous playback of a photographed image of the subject's eye. It is characterized by having a prohibition means.

(Function) According to the photographing device for the eye to be examined according to the present invention, when the photographing switch is operated, the photographed image of the eye to be examined is recorded and instantaneously reproduced. Even if the photographing switch is operated during the instantaneous playback, the strobe light emission inhibiting means prohibits strobe light emission.

(Example) Hereinafter, an example of the eye photographing apparatus of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is the main body of the eye photographing device to be examined, and 2 is an image recording device section. The eye photographing device main body 1 includes an image sensor 3 for photographing and an image sensor 4 for observation. A video signal based on the observation image of the eye to be examined from the image sensor 4 is sent to a monitor TV or the like via an image switching circuit 5 having a function described later.
It can be input to the iit & display means 6. A video signal based on the photographed image of the subject's eye by the image sensor 3 can be input to the image recording circuit 8 via the synchronization circuit 7. When the image recording circuit 8 is on, it has a function of outputting an instantaneous reproduction video signal to the image switching circuit 5.

The eye photographing apparatus main body 1 includes a strobe light emission control circuit 10 and a latch circuit 11 as a strobe light emission inhibiting means. The latch circuit 11 is connected to ON/OFF of the photographing switch 12.
F (see FIG. 2(A)), the high level (ON) and low level (0FF) are repeated as shown in FIG. 2(B). That is, the latch circuit 11
is set to high when the photographing switch 12 is operated when the state is low, and becomes low when the photographing switch 12 is operated when the state is high. The status signal of this latch circuit 11 is input to the image switching circuit 5, the image recording circuit 8, and the strobe light emission control circuit 10.

Here, the image switching circuit 5 allows the video signal from the image sensor 4 to be input to the image display means 6 when the latch circuit 11 is at a low level, and inputs the instantaneous reproduction video signal when the latch circuit 11 is at a high level. The six-sided image recording circuit 8, whose connection state is switched so that the image can be input to the image display means 6, is turned off when the latch circuit 11 is at a low level, and turned on when the latch circuit 11 is at a high level. The image recording circuit 8 is in operation OF
When F, the instantaneous regeneration circuit 9 stops instantaneous regeneration. A strobe light emission control circuit 10 allows strobe light emission when a photographing switch 12 is operated when a latch circuit 11 is at a low level, and prohibits strobe light emission when a photographing switch 12 is operated when a latch circuit 11 is at a high level.

Therefore, according to the eye photographing apparatus of the present invention, when the photographing switch 12 is turned ON as shown in FIG. As shown in FIG. 2(b), the level changes from low level to high level, and the strobe light emission control circuit 10 outputs a strobe light emission signal as shown in FIG. 2(c), so that the strobe light is emitted.

Further, the image recording circuit 8 is brought into operation as shown in FIG. 2(d). On the other hand, the image switching circuit 5 is in a connected state in which the instantaneous reproduced video signal can be input to the image display means 6. Therefore, when the strobe light is emitted, the video signal of the image sensor 3 is input to the image recording circuit 8 via the synchronization circuit 7, and thereby the video signal for -frames is recorded in the image recording circuit 8.

The instantaneous reproducing circuit 9 instantaneously reproduces, for example, a fundus image as a photographed image of the subject's eye recorded in the image recording circuit 8 and displays it on the image display means 6.

Suppose that the photographing switch 2 is erroneously operated while the photographed image of the eye to be examined is being displayed on the image display means 6. Then, the latch circuit 11 changes from high level to low level as shown in FIG. 2(b). As a result, the image switching circuit 5
The connection state of is switched, the video signal from the image sensor 4 can be input to the image display means 6, and the instantaneous reproduction of the photographed image of the eye to be examined is canceled. Further, the image recording circuit 8 is turned off, and the instantaneous reproduction circuit 9 stops outputting the instantaneous reproduction video signal. On the other hand, since the strobe light emission heat source circuit 10 is prohibited from emitting light, even if the photographing switch 12 is operated, the strobe light will not emit light.

(Effects) Since the eye photographing device according to the present invention is configured as described above, strobe light emission is prohibited even if the photographing switch is erroneously operated during instantaneous playback of the eye to be examined, thereby avoiding trouble in photographing. It has the effect of being able to

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a main part of an eye photographing apparatus according to the present invention, and FIG. 2 is a timing chart of the eye photographing apparatus according to the present invention. 5... Image switching circuit 6... Image display means 8... Image recording circuit 9... Instant playback circuit 10... Strobe light emission control circuit 11... Latch circuit (strobe light emission inhibiting means) 12.
・Photograph switch

Claims (1)

[Claims] (1) An eye photographing device to be examined which is capable of emitting a strobe based on the operation of a photographing switch to record a photographed image of the eye to be examined, instantaneously reproduce it, and display the instantaneously reproduced image, the photographed image of the eye to be examined; A device for photographing an eye to be examined, comprising a light emission prohibiting means for prohibiting light emission of the strobe even if the photographing switch is operated during instantaneous playback.