JPH09173298A - Ophthalmological camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable inspection of eyegrounds in a wide range by a method wherein a synthetic image arrayed based on the position of photographing eyes to be inspected is produced each time an image of the eyes to be inspected recorded in a recording means is photographed and displayed on an image display means to allow the generation of a panorama image positioned accurately. SOLUTION: At an image control section 25, a retinal image taken by CCD6 is stored into a frame memory and added to by a position data or the like of a fixation lamp 19 to be recorded into a recorder. The retinal image is displayed at coordinates corresponding to the position data of the fixation lamp 19 on a TV monitor. The image taken is displayed on the monitor by a control part 25 in duplication sequentially while a photographing area selection index is displayed. This index varies in display position interlocking the operation of the fixation lamp 19 so that eyes E to be inspected can be induced by adjusting the index to a desired part yet to be photographed. When all of the photographing ends, a panorama image of the retinal image is displayed on the monitor.

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 ophthalmology clinic, group medical examination and the like.

[0002]

2. Description of the Related Art Conventionally, in fundus examination by a fundus camera, it is general that the examination is performed by taking an image centering on the posterior pole portion of the eye to be examined. However, if you want to examine a wider area, you can adjust the fundus camera so that the examiner can take an image of the surrounding area, or use the fixation target to guide the eye to be examined, etc. The images are continuously photographed across, and the obtained images are combined and combined to create a panoramic image, which is used for inspection.

[0003]

However, in the above-mentioned conventional inspection method, the work of combining the obtained images by combining is troublesome, and there is a possibility that the combining position may be wrong, etc. It is a problem when you want to inspect.

The object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide an ophthalmologic photographing apparatus capable of creating a precisely positioned panoramic image by a simple operation and thereby inspecting the fundus in a wide range.

[0005]

According to a first aspect of the present invention to achieve the above object, there is provided an ophthalmic photographing apparatus for illuminating an eye to be examined, and photographing means for photographing the eye to be examined illuminated by the illuminating means. A position selecting means for selecting a photographing position of the eye to be inspected, a recording means for recording the photographing position of the eye to be inspected selected by the position selecting means and the eye image photographed by the photographing means, and the recording means. Provided is image control means for creating a composite image in which the recorded image of the eye to be inspected is arranged for each imaging based on the imaging position of the eye to be inspected, and image display means for displaying the composite image created by the image control means. It is characterized by that.

An ophthalmologic photographing apparatus according to a second aspect of the present invention includes an illuminating means for illuminating the eye to be examined, a photographing means for photographing the eye to be examined illuminated by the illuminating means, and a position selecting means for selecting a photographing position of the eye to be examined. Recording means for recording the imaging position of the eye to be inspected selected by the position selecting means and the image of the eye to be inspected taken by the image taking means, and imaging of the eye to be inspected every time the image of the eye to be inspected recorded in the recording means is taken Image control means for creating a composite image arranged on the basis of position, an index indicating an imageable range of the imaging means, and index control means for combining the index with the composite image based on the imaging position of the eye to be examined. An image display means for displaying the composite image and the index is provided.

An ophthalmologic image taking apparatus according to a third aspect of the present invention includes an illuminating means for illuminating an eye to be examined, an image taking means for taking an image of the eye to be inspected illuminated by the illuminating means, and a position selecting means for selecting an image taking position of the eye to be inspected. Recording means for recording the imaging position of the eye to be inspected selected by the position selecting means and the image of the eye to be inspected taken by the image taking means, and imaging of the eye to be inspected every time the image of the eye to be inspected recorded in the recording means is taken Image control means for creating a composite image arranged based on position, and image display means for switching and displaying the composite image created by the image control means and the alignment image captured by the photographing means are provided. Characterize.

[0008]

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-mydriasis fundus camera of the first embodiment. On the optical path O1 in front of the eye E to be examined, an objective lens 1, a perforated mirror 2 having a central aperture, an optical path O1.
A focusing lens 3, a taking lens 4, a half mirror 5 that descends downward when taking a picture, a CCD 6
Are sequentially arranged to form an observation and photographing optical system.
Here, the half mirror 5 has characteristics of transmitting 100% of infrared light, reflecting 50% of visible light, and transmitting 50% of visible light.

On the optical path O2 in the incident direction of the perforated mirror 2, from the side of the perforated mirror 2, the corneal baffle 7, the relay lenses 8a and 8b, the crystalline lens baffle 9, the ring slit 10 having an annular opening, the condenser lens 11, A photographing light source 12 including a xenon tube, a condenser lens 13, an infrared filter 14 that transmits infrared light, an illumination light source 15 including a halogen lamp, and a concave reflecting mirror 16 are sequentially provided to form an illumination optical system. There is.

On the optical path O3 in the incident direction of the half mirror 5, there are provided a field lens 17, a lens 18, and a fixation lamp 19 composed of a visible light source for guiding the eye E to be examined to a desired observation / photographing site. A fixation lamp projection system is formed.

Further, a function control section 20 is provided as an electric circuit, and the output of a shooting switch 21 provided in a joystick (not shown) and operated at the time of shooting is connected to the function control section 20. Is the photographing light source 12
Is connected to a light amount control unit 23 that controls the light amount of the, the fixation lamp control unit 24 that controls the projection position of the fixation lamp 19, and an image control unit 25 that processes the output of the CCD 6.

The fixation lamp control section 24 is constructed as shown in FIG. 2, and the fixation lamp 19 and the lever section 26 are rotatably supported around a fulcrum C, so that the examiner can fix the fixation lamp control section. By operating the lever portion 26 via 24, the fixation lamp 19
It is possible to change the presenting position of (1) to guide the line of sight of the eye E to a desired observation and imaging site.

FIG. 3 is a block diagram of the image control system. The image control unit 25 is connected to the outputs of the CCD 6 and the function control unit 20, and further, the television monitor 27, the frame memory 28, the keyboard 29, the recording device 30, and the mouse. 31 is connected.

When the illumination light source 15 is turned on, the illumination light source 15
The light flux reflected by the concave reflecting mirror 16 is converted into an infrared light flux by the infrared filter 14, is reflected by the perforated mirror 2 through the optical path O2, and illuminates the fundus Er of the eye E to be examined.
The reflected light beam from the fundus Er passes through the half mirror 5 through the optical path O1 and forms an image on the image pickup surface of the CCD 6.

The function controller 20 and the fixation lamp controller 24 are also provided.
Then, the fixation lamp 19 is turned on at a designated position, an image is once formed on the field lens 17, a part of the light is reflected by the half mirror 5, and is projected onto the fundus Er of the eye E through the optical path O1. Here, the fixation lamp 19 is visually recognized by the eye E to be inspected, and the fixation lamp 19 is focused on.
By changing the projection position of the fixation lamp 19, the eye E to be inspected is guided to select a desired observation and imaging region. A part of the light flux from the fixation lamp 19 reflected by the fundus Er passes through the half mirror 5 through the optical path O1 and is imaged on the image pickup surface of the CCD 6.

The output of the CCD 6 is transmitted to the image control unit 25, and the image control unit 25 displays the fundus image of the eye E to be inspected illuminated with infrared light and the image of the fixation lamp 19 on the television monitor 27.
At this time, the image control unit 25 detects the position of the fixation lamp 19 imaged on the image pickup surface of the CCD 6.

FIG. 4 shows the fundus image Er 'of the eye E and the image 19a of the fixation lamp 19 displayed on the television monitor 27. The examiner observes the fundus image displayed on the television monitor 27, and makes preparations for fundus imaging such as so-called alignment for aligning the optical axes of the eye E and the fundus camera and alignment of the working distance. When the preparation for photographing is completed, the examiner operates the photographing switch 21. The output of the photographing switch 21 is transmitted to the function control unit 20, and the function control unit 20 causes the mirror drive unit 22 to retract the half mirror 5 to the position indicated by the broken line, and the light amount control unit 23 causes the photographing light source 12 to emit light. The image control unit 25 is notified that the state has been entered. The image control unit 25 receives a signal from the function control unit 20 and prepares to capture a still image.

The luminous flux of the photographing light source 12 passes through the optical path O2, is reflected by the perforated mirror 2, and reaches the fundus Er of the eye E to be examined. The reflected light from the fundus Er passes through the optical path O1 and forms a fundus image of the eye E on the imaging surface of the CCD 6.

The image control unit 25 stores the fundus image of the eye E to be inspected captured by the CCD 6 in the frame memory 28,
The recording device 3 adds the position data of the fixation lamp 19 and the date and subject data input by the keyboard 29.
Record at 0. In addition, the image control unit 25 uses the TV monitor 2
The coordinates are set on 7 and the fundus image Er 'is displayed at the coordinates corresponding to the position data of the fixation lamp 19. That is, if the presentation position of the fixation lamp 19 changes, the display position of the fundus image Er 'on the television monitor 27 changes correspondingly.

With such a procedure, desired observation and photographing regions are sequentially photographed. At this time, as shown in FIG. 5, the image control unit 25 displays the image captured later on the television monitor 27 in an overlapping manner with the image captured previously, so that the uncaptured portion can be confirmed. It is possible to prevent forgetting to take a picture of the part or duplication. Furthermore, the TV monitor 27
A shooting area selection index A indicating a shooting range is displayed above. The display position of the shooting area selection index A changes in association with the operation of the fixation lamp 19, and the examiner adjusts the shooting area selection index A to a desired non-shooting portion to move the eye E to be inspected. It can be guided to a desired position.

When the photographing switch 21 is operated in this state, the image controller 26 controls the television monitor 27 to display an observation image as shown in FIG. 4 for alignment. In this embodiment, the photographing switch 2
Although 1 is also used as a switch for switching the display image,
A dedicated switch may be provided, or the switch may be linked to the movement of the stage for alignment.
Further, an alignment monitor and a recorded image display monitor may be separately provided.

When all photographing is completed, the television monitor 2
A panoramic image of the fundus oculi image Er 'as shown in FIG. 6 is obtained on the image 7, and the examiner can inspect a wide range of the fundus oculi Er using this panoramic image. Further, when a disease of the fundus Er is found in the examination and an image of a diseased portion is selected on the TV monitor 27 with the keyboard 29 or the mouse 31, the image of the portion selected by the image control unit 25 is displayed on the TV monitor 27. Is displayed on the entire screen of, and the examiner can precisely inspect the diseased part at high magnification.

In this embodiment, the fixation lamp is presented by the fixation lamp controller 24 as described with reference to FIG.
The position of the fixation lamp was detected by the image control unit 25 and the fixation lamp control unit 24, as shown in FIG.
A position detection sensor 32 for detecting the movement amount of 9 is added,
The projection position of the fixation lamp 19 may be known.

Further, the fixation lamp control section 24 is shown in FIGS.
A fixation lamp 33 and a liquid crystal shutter 34 as shown in FIG.
It is also possible to control the positions of the opening A of the liquid crystal shutter 34 and the plurality of light-shielding portions B by the function control unit 20 so that the fixation lamp 19 is presented and the position thereof is detected.

As the fixation lamp control unit 24, a fixation lamp 35 composed of a plurality of LEDs as shown in FIGS. 10 and 11 is provided, and the function control unit 20 controls the fixation LEDs 35a, 3a and 3b.
It is also possible to control the lighting part and the extinguishing part of 5b, 35c, ... And perform the presentation and position detection of the fixation lamp 35.

Further, in the above-mentioned embodiment, the internal fixation lamp is used, but instead of the fixation lamp control unit 24, FIG.
2, a fixation lamp 36 having a plurality of LEDs arranged in a ring shape around the optical axis of the fundus camera is provided in the vicinity of the objective lens 1 as shown in FIG. If the lighting and extinguishing units of 36b, 36c, ... Are controlled so that the fixation lamp is presented and the position is detected, it is possible to carry out the photographing with the external fixation lamp.

[0027]

As described above, the ophthalmologic imaging apparatus of the present invention can create a panoramic image whose position is accurately determined without any troublesome work, and can inspect a subject's eye in a wide range. Will be easier. Further, since the captured images are sequentially displayed in an overlapping manner on the image display means, the examiner can easily confirm the uncaptured portion, and forget to capture the images necessary for creating the panoramic image. Can be prevented. Furthermore, since it is possible to check for defective images due to poor fixation or unsuccessful photography of the subject,
Workability is improved, for example, it can be retaken immediately.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a fundus camera of an embodiment.

FIG. 2 is a configuration diagram of a fixation lamp control unit.

FIG. 3 is a configuration diagram of an image control system.

FIG. 4 is a front view on a television monitor.

FIG. 5 is an explanatory diagram of creating a panoramic image.

FIG. 6 is a front view of a television monitor displaying a panoramic image.

FIG. 7 is a configuration diagram of a fixation lamp control unit according to another embodiment.

FIG. 8 is a side view of the fixation lamp.

FIG. 9 is a front view of the fixation lamp.

FIG. 10 is a side view of the fixation lamp.

FIG. 11 is a front view of the fixation lamp.

FIG. 12 is a side view of the fixation lamp.

FIG. 13 is a front view of the fixation lamp.

[Explanation of symbols]

 1 Objective Lens 6 CCD 12 Photographing Light Source 14 Infrared Filter 15 Illuminating Light Source 19, 33, 35, 36 Fixing Light 20 Function Control Unit 21 Shooting Switch 23 Light Quantity Control Unit 24 Fixing Light Control Unit 25 Image Control Unit 27 TV Monitor 28 Frame memory 30 Recording device 32 Position detection sensor 37 Imaging area selection index

Claims (7)

[Claims] 1. An illuminating means for illuminating an eye to be inspected, a photographing means for photographing the eye to be inspected illuminated by the illuminating means, a position selecting means for selecting a photographing position of the eye to be inspected, and the position selecting means. A recording unit that records the imaging position of the eye to be inspected and the image of the eye to be inspected captured by the image capturing unit; and An ophthalmologic photographing apparatus comprising: an image control unit that creates an image; and an image display unit that displays a composite image created by the image control unit. 2. An illuminating means for illuminating an eye to be inspected, a photographing means for photographing the eye to be inspected illuminated by the illuminating means, a position selecting means for selecting a photographing position of the eye to be inspected, and the position selecting means. A recording means for recording the photographing position of the eye to be inspected and the image of the eye to be inspected photographed by the photographing means, and a composite image in which the image of the eye to be inspected recorded in the recording means is arranged based on the photographing position of the eye to be inspected for each photographing. An image control means for creating an image, an index indicating an imageable range of the image capturing means, an index control means for combining the index with the composite image based on the imaging position of the eye to be inspected, the composite image and the index An ophthalmologic photographing apparatus comprising: an image display unit for displaying. 3. An illuminating means for illuminating an eye to be examined, a photographing means for photographing the eye to be examined illuminated by the illuminating means, a position selecting means for selecting a photographing position of the eye to be inspected, and the position selecting means. A recording means for recording the photographing position of the eye to be inspected and the image of the eye to be inspected photographed by the photographing means, and a composite image in which the image of the eye to be inspected recorded in the recording means is arranged based on the photographing position of the eye to be inspected for each photographing. An ophthalmologic photographing apparatus, comprising: an image control unit that creates the image, and an image display unit that switches and displays the composite image created by the image control unit and the alignment image taken by the imaging unit. 4. The ophthalmologic imaging apparatus according to claim 1, wherein the position selection unit is a fixation target whose presentation position is variable. 5. The ophthalmologic photographing apparatus according to claim 1, wherein the position selecting unit allows the photographing unit to rotate about an eye to be examined. 6. The ophthalmologic photographing apparatus according to claim 1, wherein the photographing means is an electronic image sensor. 7. The ophthalmologic photographing apparatus according to claim 3, wherein the display switching unit is adapted to interlock with movement of the gantry.