JP2000287938A - Eyegronds photographing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out non-mydriatic photographing and infrared fluorescent photographing with one eyegrounds camera without causing operational mistake. SOLUTION: When an infrared fluorescent photographing mode is selected, the ICG display M and infrared filter F are displayed on a video monitor 25 in a flickering state. When an infrared filter 3 is secured from an optical path 01, a signal from a micro switch 4 is inputted to a signal control means 26, and the infrared filter display F disappears on the video monitor 25. By displaying in this manner, the infrared filter 3 can be protected from being left in the optical path 01.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fundus photographing apparatus used in ophthalmic hospitals and the like.

[0002]

2. Description of the Related Art Conventionally, a non-mydriatic retinal camera and an infrared fluorescent retinal camera are configured as separate retinal cameras.

[0003]

However, the conventional example described above has a problem that two fundus cameras are required for non-mydriatic photography and infrared fluorescence photography.

An object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a fundus photographing apparatus capable of performing non-mydriatic photographing and infrared fluorescent photographing with one fundus camera without an operation error.

[0005]

According to the present invention, there is provided a fundus photographing apparatus for observing and photographing a fundus of an examinee with infrared light. It is characterized in that, with the insertion, evacuation of the infrared filter or display relating to evacuation is performed on the fundus observation monitor.

A fundus photographing apparatus according to the present invention includes an infrared photographing means for photographing a fundus of an examinee with infrared light and displaying a moving image for positioning the examinee's eye, and an image photographing the fundus with visible light. Visible imaging means, and has a common recording means for recording the video of the infrared imaging means and the visible imaging means, switching the recording means with a shooting mode setting or insertion of an infrared fluorescent filter, A video of the infrared imaging means or the visible imaging means is recorded.

A fundus photographing apparatus according to the present invention is characterized in that, in a fundus photographing apparatus for observing and photographing a fundus of an examinee with infrared light, an infrared fluorescence excitation filter is inserted into an optical path only at the moment of strobe light emission. I do.

A fundus photographing apparatus according to the present invention is characterized in that, in a fundus photographing apparatus for observing and photographing on a video monitor, a still image photographed only while a shutter is pressed is displayed on the video monitor.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 is a configuration diagram of a non-mydriatic retinal camera capable of performing infrared fluorescence imaging according to the embodiment. On the illumination optical path O1 from the halogen lamp light source 1 to the objective lens 2 for fundus observation and infrared fluorescent continuous imaging, an infrared filter 3 that can cut off light having a wavelength of 800 nm or less and can be inserted into and removed from the optical path. A micro switch 4, a lens 5, a strobe light source 6 for photographing, an infrared fluorescence excitation filter 7 that transmits light having a wavelength of 700 to 800 nm and can be inserted into and removed from an optical path, a micro switch 8 that detects the insertion, and projects focus light. A split optical system 9, a small mirror 10, a solenoid 11 for driving insertion and removal of the split optical system 9 into and out of the optical path, a lens 12, and a perforated mirror 13 are arranged.

Behind the perforated mirror 13 on the optical path O2 facing the eye E, a focus lens 14, an imaging lens 15, an optical path switching mirror 16, a visible fluorescent filter 17 that can be inserted into and removed from the optical path, a relay lens 18, color CC
A visible imaging means 19 which is a D video camera is arranged, and an infrared fluorescent filter 20 which can be inserted into and removed from the optical path, a relay lens 21 and an infrared imaging which is a video camera are provided on an optical path O3 in a reflection direction of the optical path switching mirror 16. Means 22 are sequentially arranged, and the optical path switching mirror 16 is driven by the solenoid 23 to switch the optical paths O2 and O3.

The outputs of the visible imaging means 19 and the infrared imaging means 22 are supplied to the input switching means 24 of the imaging means 19 and 22.
a connected to a recording means 24 such as a magneto-optical MO having
The output of the infrared imaging means 22 is also connected to a video monitor 25. The output of the recording means 24 is connected to a signal control means 26 having a character generator for controlling the system. The output of the photographing mode setting means 27 is connected to the signal control means 26. The output of the signal control means 26 is a solenoid. 2
3. Connected to the video monitor 25.

First, an imaging mode is set by the mode setting means 27 from non-mydriatic color imaging, visible fluorescence imaging, infrared fluorescence imaging, and the like. When the shooting mode is set, a signal from the mode setting unit 27 is input to the signal control unit 26, and the mode display M is displayed on the video monitor 25. Further, at the same time as the setting of the amount of light and the setting of the optical path switching mirror 16, the switching means 24a of the recording means 24 allows the imaging means 1 to perform recording.
9 and 22 are set.

The setting of the photographing mode may be performed by detecting insertion and removal of the fluorescent filters 7, 17, and 20 to and from the optical paths O1, O2, and O3. That is, the photographing mode is identified based on the state of the visible fluorescent filter 17 or the infrared fluorescent filter 20 being inserted into and removed from the optical path, and the imaging means 19 and 22 are selected. If both filters 17 and 20 are not inserted in the optical path, the mode is recognized as the non-mydriatic color imaging mode, and the visible imaging unit 19 is selected by the switching unit 24a. Thus, by setting the switching means 24a in conjunction with the fluorescent filters 7, 17, 20 and the mode setting means 27, it is possible to record a desired image without fail.

At the time of non-mydriatic photography, the fluorescent filters 7, 1
Reference numerals 7 and 20 retreat outside the optical paths O1, O2 and O3, and the infrared filter 3 is inserted into the optical path O1.

The luminous flux from the halogen lamp light source 1 is projected onto the fundus R via the infrared filter 3, the lenses 5, 12, the perforated mirror 13, and the objective lens 2, and the reflected light is reflected on the objective lens 2, the perforated mirror. A fundus image R ′ is captured by the infrared imaging means 22 through the hole 13, the focus lens 14, the imaging lens 15, the optical path switching mirror 16, and the relay lens 21 by the infrared imaging means 22. 25 is displayed as a moving image.

Further, the small mirror 1 from the split optical system 9
The split light beam is projected on the fundus R via the lens 0, the lens 12, the perforated mirror 13, and the objective lens 2. The split light beam S projected on the fundus R by the split optical system 9 is displayed on the video monitor 25 together with the fundus image R ′.

Positioning and focusing are performed while viewing the screen of the video monitor 25. When the shutter is pressed, the switching mirror 16 jumps up and emits light from the strobe light source 6.
The luminous flux from the strobe light source 6 illuminates the fundus R through the same optical path O1 as the observation light, and the fundus image R ′ similarly passes through the optical path O2, and a still image is captured by the visible imaging means 19 through the relay lens 18. The video signal is recorded by the recording means 24.

When the infrared fluorescent photographing mode is selected by the mode setting means 27, the ICG display M and the infrared filter display F are displayed on the video monitor 25 in a blinking manner. When the infrared filter 3 is retracted from the optical path O1, the signal of the microswitch 4 that detects this is input to the signal control means 26, and the infrared filter display F on the video monitor 25 disappears.
By performing such a display, the infrared filter 3 is not forgotten to be removed from the optical path O1.

The infrared fluorescent filters 7, 20 are connected to the optical paths O1, O
3 and the insertion and removal of the infrared fluorescent filters 7 and 20 are displayed on the video monitor 25. When the infrared fluorescent filter 7 is inserted, the micro switch 8 detects this and displays the display M on the video monitor 25 via the signal control means 26. With the setting of the infrared fluorescent mode or by detecting the insertion of the infrared fluorescent filter 7, the switching mirror 16 is fixed at the time of photographing, and the switching means 24a is switched to record the image from the infrared photographing means 22. To control. At this time,
Even when photographing is performed, the optical path switching mirror 16 does not move, but is illuminated by the strobe light source 6 and photographed by the infrared imaging means 22. At the time of photographing, the small mirror 8 is retracted from the optical path O1.

Instead of displaying the infrared filter F, the infrared filter 2 may be mechanically linked with the infrared fluorescence excitation filter 7 so that when one is inserted, the other is discharged. Further, the infrared fluorescence excitation filter 7 may be driven by a solenoid (not shown) and inserted into the optical path O1 only at the moment of flash photography. In this case, the infrared filter 3 and the infrared fluorescent filter 20 may be left inserted in the optical paths O1 and O3 during photographing.

Since the observation position adjustment is performed by infrared light, the subject is not dazzling and the burden is reduced. When a photographing shutter (not shown) is pressed, the strobe light source 6 emits light, the image is recorded in the recording means 24, and the still image is immediately displayed on the monitor 25.
Will be displayed. If the shutter depressed at the time of shooting is not released and is kept pressed, the still image is displayed during that time. When the shooting shutter is released, the display returns to the original video moving image display.
When photographing one after another in a short time, the photographing shutter is pressed to display the photographed fluorescent still image, and the next photographing can be performed immediately after confirming the next photographing position while confirming the photographed video. In this manner, the fundus photographing can be efficiently performed by using the video monitor 25 for positioning for confirming the photographed fluorescent image.

[0022]

As described above, the fundus photographing apparatus according to the present invention performs evacuation display of the infrared filter on the fundus observation monitor in accordance with the setting of the photographing mode or the insertion of the infrared fluorescent filter. A desired photographing can be reliably performed without forgetting to remove the filter.

Further, the fundus photographing apparatus according to the present invention records the image of the infrared photographing means or the visible photographing means with the setting of the photographing mode or the insertion of the infrared fluorescent filter, so that the switching of the recording means is forgotten. Therefore, desired photographing can be reliably performed.

In the fundus photographing apparatus according to the present invention, since the infrared-excited fluorescent filter is inserted into the optical path only at the moment of strobe emission, the burden on the patient can be reduced.

The fundus photographing apparatus according to the present invention displays still images photographed only while the shutter is pressed, on the video monitor, and performs photographing one after another while confirming photographed images on the video monitor for positioning. be able to.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an ophthalmologic photographing apparatus according to an embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Halogen lamp light source 3 Infrared filter 6 Strobe light source 7 Infrared fluorescence excitation filter 9 Split optical system 17 Visible fluorescence filtration filter 19 Visible imaging means 20 Infrared fluorescence filtration filter 22 Infrared imaging means 24 Recording means 25 Video monitor 26 Signal control Means 27 Shooting mode setting means

Claims (4)

[Claims] 1. A fundus photographing apparatus for observing and photographing a fundus of an examinee with infrared light, with the setting of a photographing mode or the insertion of an infrared fluorescent filter, a display relating to the retraction or retreat of the infrared filter is performed on a fundus observation monitor. A fundus photographing apparatus characterized in that: 2. An infrared imaging means for imaging a fundus of an eye to be inspected with infrared light and displaying a moving image for positioning of the eye to be inspected, a visible imaging means for imaging a fundus of eye with visible light, and the infrared light A common recording unit for recording an image of the imaging unit and the visible imaging unit, and switching the recording unit in accordance with setting of a photographing mode or insertion of an infrared fluorescent filter, to set the infrared imaging unit or the visible imaging unit. A fundus photographing apparatus characterized by recording an image of the means. 3. A fundus photographing apparatus for observing and photographing a subject's fundus with infrared light, wherein an infrared fluorescence excitation filter is inserted into an optical path only at the moment of strobe light emission. 4. A fundus photographing apparatus for observing and photographing on a video monitor, wherein a still image photographed only while a shutter is pressed is displayed on the video monitor.