JPH0422332A - Photographing device for ophthalmologic use - Google Patents

Abstract

PURPOSE:To avoid misrecording of image due to strobe light emission by prohibiting light emission of the strobe on the basis of judgement placed by a judgement control means even though a photographing switch is turned on when an image recording apparatus is not in the image recording prepared condition. CONSTITUTION:A photographing switch 14 is connected with a strobe light emission control circuit 10 and a judgement control means 12. The judgement control means 12 gives and a receives information to/from a microcomputer 13 and performs judgement whether light emission of strobe is to be prohibited or permitted and whether a momentary reproduced image or an observation image is to be displayed on an image display means 6. An image recording preparation switch 15 is of self-return type, i.e., the off condition is restituted automatically by a spring if hand is separated while the condition is On. When this image recording preparation switch 15 is turned on, a prepare signal is fed to the judgement control means 12 via an image recorder circuit 8. This image recorder circuit 8 is put in the image recordable condition by turning on the image recording preparation switch 15.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention emits a strobe based on the operation of a photographing switch to record and reproduce a photographed image of the eye to be examined in an image recording device, and to display the reproduced image as an image. This invention relates to an improvement in an ophthalmological imaging device that displays information on a display device.

(Prior Art) Conventionally, a strobe light is emitted by operating a photographing switch provided on the main body of an ophthalmological photographing apparatus, and an image of the subject's eye is recorded on an image recording device connected to the main body of the ophthalmological photographing apparatus. At the same time as reproducing the photographed image of the subject's eye recorded in the device, the display state of the image display means displaying the observed image is switched from a state displaying the observed image to a state displaying the reproduced image, and the image is displayed. 2. Description of the Related Art An ophthalmological photographing apparatus is known in which a reproduced image is displayed on a means.

According to this type of ophthalmological photographing device, when a photograph is taken, the photographed image of the eye to be examined 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 consider things.

(Problem to be Solved by the Invention) However, in this conventional ophthalmological imaging device, the image recording device and the ophthalmological imaging device main body are activated by separate and independent operations. Playback is performed by operating a button dedicated to playback, so if you operate the shooting switch while the image of the eye to be examined is being played back, the strobe will fire and the intended image of the eye to be examined will be recorded on the image recording device. This may cause confusion in which the examiner may mistakenly believe that the image of the eye to be examined has been recorded due to flash emission without being recorded, 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 ophthalmological photographing device that can prevent strobe light emission even if the photographing switch is operated while the image recording device is in a playback state, thereby avoiding recording errors caused by strobe light emission. Our goal is to provide the following.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a judgment control means for at least judging whether or not the image recording device is in an image recording preparation state in the main body of the ophthalmological photographing apparatus. The present invention is characterized in that even if the photographing switch is operated when the image recording device is not in an image recording preparation state, the strobe light emission is prohibited based on the judgment of the judgment control means.

(Function) According to the present invention, by turning on the image recording preparation switch and then operating the photographing switch, the strobe light is emitted and the photographed image of the eye to be examined is recorded in the image recording device. When the image recording preparation switch is in the OFF state, flashing of the strobe is prohibited even if the photographing switch is operated.

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

In FIG. 1, 1 is the main body of an ophthalmological photographing apparatus, and 2 is an image recording device. The ophthalmological photographing apparatus main body 1 includes an image sensor 3 for photographing, an image sensor 4 for observation, an image switching means 5, an image display means 6, a strobe light emission control circuit 10, and a photographing switch 1.
4. 0 having judgment control means 12 and μ computer 13
The image recording device 2 includes a synchronization circuit 7, an image recording circuit 8, a disk 11, an instantaneous playback circuit 9, a microcomputer 13,
It has an image recording preparation switch 15.

The image sensor 3 is connected to an image recording circuit 8 via a synchronization circuit 7, and the photographed image of the eye to be examined from the image sensor 3 is sent to the image recording circuit 8.
The information is magnetically recorded on the disk 11 via the . The instantaneous reproducing circuit 9 has a function of instantaneously reproducing the photographed image of the subject's eye magnetically recorded on the disk 11 frame by frame. This instantaneous reproducing circuit 9 is connected to an image switching means 5. The image switching means 5 has a function of switching between an image signal based on an observed image from the image sensor 4 and an image signal based on the instantaneous reproduction of the instantaneous reproducing circuit 9. The image display means 6 has a function of displaying an observed image or an instantaneous reproduced image based on the display switching of the image switching means 5.

The photographing switch 14 is connected to the strobe light emission control circuit 10 and the judgment control means 12. The judgment control means 12 exchanges information with the microcomputer 13, and judges whether to prohibit or permit strobe light emission and displays images. It has a function of determining whether the means 6 should display an instantaneous reproduced image or an observed image.

The image recording preparation switch 15 is of a self-resetting type, that is, a type that automatically returns to the off state by a spring when the switch is turned on and then released. When the image recording preparation switch 15 is turned on, a preparation signal is inputted to the judgment control means 12 via the image recording circuit 8.

The image recording circuit 8 becomes ready for image recording by turning on the image recording preparation switch 15.

The determination control means 12 outputs a strobe light emission permission signal to the strobe control circuit 10 based on the preparation signal. As a result, the control means 12 determines that the strobe can emit light, and at the same time sends a switching signal to the image switching means for switching the image display means 6 from the state where the instantaneous playback image is being played back to the state where the observation image is displayed. Output to 5. Thereby, the examiner adjusts the ophthalmologic imaging apparatus main body with respect to the eye to be examined while observing the eye to be examined.

When the photographing switch 14 is operated with the ophthalmologic photographing apparatus main body 1 properly set on the eye to be examined, the strobe light emission control circuit 10 causes the strobe to emit light.

At the same time, a switching signal is input from the judgment control means 12 to the image switching means 5 to switch to a state where the reproduced image is reproduced and displayed.

As a result, the eye to be examined, for example, the fundus, is illuminated, and a photographed image of the eye to be examined is received by the image sensor 3. An image signal based on the photographed image of the eye to be examined is recorded on a disk 11 via a synchronization circuit 7 and an image recording circuit 8. The disk 11
The photographed image of the subject's eye recorded in the image is instantaneously reproduced by the instantaneous reproducing circuit 9, and is displayed on the image displaying means 6 via the image switching means 5.
will be displayed.

When the image recording preparation switch 15 is off, the determination control means 12 outputs a strobe light emission prohibition signal to the strobe light emission control circuit 10 and also outputs an image recording prohibition signal to the image recording circuit 8. Therefore, even if the photographing switch 14 is operated, strobe light emission and image recording are prohibited, and unintended image recording due to careless operation of the photographing switch 14 is prohibited. Further, the judgment control means 12 does not output a switching signal to the image switching means 5, so that the image display means 6 continues to display the instantaneous reproduced image.

To continue shooting, press the image recording preparation switch 15.
Turn on again. Then, the judgment control means 12 switches the image switching means 5 so that the image display means 6 displays the observed image again.

As described above, in the embodiment, when photographing is performed, the image switching means 5 is switched from a state in which an observation image is displayed to a display state in which a reproduced image is displayed, and the recorded image of the eye to be examined is instantaneously reproduced by the reproducing circuit 9. However, in an ophthalmological photographing apparatus that does not adopt a configuration in which the observed image is displayed on the image display means 6, the image switching means 5
is not necessary. Further, in this case, the judgment control means 12
It is sufficient to have a function to determine whether strobe light is prohibited or permitted.

(Effects) As explained above, the ophthalmological imaging device according to the present invention has the following effects:
Since the main body of the ophthalmological photographing apparatus and the image recording device are connected by an image recording preparation switch, strobe light emission is prohibited even if the photographing switch is inadvertently operated while the image recording device is in the playback mode. It is possible to avoid misunderstandings and unnecessary confusion caused by strobe light emission, such as the fact that something is being recorded when it is not.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block circuit diagram of an ophthalmologic imaging apparatus according to the present invention. 5... Image switching means, 6... Image display means 8...
・Image recording circuit, 9... Instant playback circuit 10... Strobe light emission control circuit 12... Judgment means, 15... Image recording preparation switch procedure amendment (voluntary)

Claims (1)

[Scope of Claims] A strobe light is emitted by operating a photographing switch provided on the main body of the ophthalmological photographing apparatus, and an image of the subject's eye is recorded in an image recording device connected to the main body of the ophthalmological photographing apparatus, and the image is recorded. An ophthalmological photographing device that reproduces and displays a photographed image of the subject's eye recorded in the device on an image display means, the main body of the ophthalmological photographing device having at least a function for determining whether or not the image recording device is in an image recording preparation state. The ophthalmology clinic is characterized in that a judgment control means is provided, and when the image recording device is not in an image recording preparation state, the strobe light emission is prohibited based on the judgment of the judgment control means even if the photographing switch is operated. Photography equipment.