JPS6355929B2 - - Google Patents

Description

[Detailed Description of the Invention] When observing the inside of the eyeball under magnification, the objective lens of a microscope is brought into contact with the cornea, and at that time, the area to be observed is illuminated with illumination light that travels backwards within the objective lens. . In this case, the illumination light is reflected by the tip surface of the objective lens and overlaps with the image beam, resulting in a problem that the observable field of view becomes extremely narrow.

To explain this using FIG. 1, for example, when observing endothelial cells of the cornea 1, the tip optical member 2 in the objective lens is brought into contact with the corneal surface, and illumination light having a spread as shown in A is transmitted through the objective lens. By moving the light backwards, a range D of corneal endothelial cells can be illuminated. Therefore, it should be possible to observe the range D as a field of view by using the image light beam which originally had a spread B. However, the illumination light is reflected by the distal end surface of the distal optical member 2, and the reflected light having a spread C travels in the same direction as the image ray. Since the reflectance of corneal endothelial cells is originally very low, it becomes impossible to observe the portion where the reflected light overlaps, and only the region W that is slightly free from the overlap of the reflected light can be observed.

If we use the above-mentioned microscope system to take an image with a television camera, if there was no reflected light, the area D would be displayed to fill the entire video screen as shown in Figure 2, but the image would be displayed only in a narrow area W. 3 is displayed, and the remaining screen 4 is displayed pure white due to the reflected light.

The purpose of this invention is to clearly display almost the entire illuminated area as an image, especially when an image is taken by a television camera, and this will be explained below based on the embodiment shown in the third figure.

Reference numeral 5 denotes an objective lens including the tip optical member 2 shown in FIG. 1, and a television camera 6 and a flying spot device 7 face the back side of the objective lens. The television camera 6 has an imaging lens 8 and a photoelectric conversion surface 9 like a normal camera. The flying spot device 7 also has a fluorescent screen 10 and a projection lens 11 that are scanned by an electron beam. The horizontal and vertical scanning of the television camera 6 and the flying spot device 7 are carried out synchronously due to the electrical coupling shown by line 12, and the signal obtained by the television camera 6 is transmitted to the monitor. Receiver 1
3.

In FIG. 1, when a bright line 14 as shown is projected on the phosphor screen 10 of the flying spot device 7, this bright line is focused on the endothelial cell portion 15 of the cornea 1 by the projection lens 10 and the objective lens 5. The image beam is imaged on the photoelectric conversion surface 9 of the television camera 6 at the position of the scanning line 16 that is being imaged at that moment. As is clear from the figure, the reflected light at the tip of the objective lens does not form an image at the position of the scanning line 16. Therefore, the imaging operation by the scanning line 16 of the television camera 6 is not disturbed by reflected light at all. Bright line 1
4 and the scanning line 16 move vertically in synchronization, it is possible to image a wide range without any interference from reflected light, and as shown in FIG. 3 can be displayed.

In this case, in consideration of the curvature of the cornea and minute deviations in synchronization between the television camera 6 and the flying spot device 7, the width of the bright line 14 is set to be wide enough to prevent the reflected light from being superimposed on the image beam. It is desirable to have the image drawn on the screen.

As described above, according to the present invention, an enlarged image of a wide range inside the eyeball can be displayed on a monitor television, so it is particularly effective for discussions of symptoms by a team of doctors, guidance for medical students, etc.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the mutual relationship between illumination light, reflected light, and image rays, FIG. 2 is an explanatory diagram of an observed image disturbed by reflected light, and FIG. 3 is a block diagram of an embodiment of the present invention. FIG. 4 is an explanatory diagram of an observed image according to the present invention. DESCRIPTION OF SYMBOLS 1... Cornea (sample), 5... Objective lens (common lens), 6... Television camera, 7... Flying spot device, 8... Imaging lens, 9...
...Photoelectric conversion surface, 10... Fluorescent screen, 11... Projection lens.

Claims (1)

[Claims] 1. A common lens arranged close to the specimen, and a television camera and a flying camera arranged almost symmetrically on both sides of a plane passing through the optical axis of the common lens behind the common lens when viewed from the specimen. The television camera has a lens that cooperates with the common lens to form a conjugate focus of the specimen, and a photoelectric conversion surface disposed on the conjugate focus, and the television camera has a photoelectric conversion surface disposed on the conjugate focus, and The surface is configured to perform line scanning in a direction parallel to the plane and surface scanning in a direction perpendicular to the line scanning, and the flying spot device cooperates with the common lens to focus the conjugate focus of the specimen. The light emitting surface has a lens to form and a light emitting surface arranged on the convergence focus of the light emitting surface, and the light emitting surface can perform line scanning in a direction parallel to the plane and plane scanning in a direction perpendicular to the line scanning by a light point. An eyeball imaging device characterized in that it is configured to perform scanning in synchronization with the scanning of a television camera.