JPS5875533A - Eye bottom camera for electrophysiological diagnosis - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fundus camera capable of electrophysiological diagnosis.

Although there is a physiologically significant relationship between the fundus image obtained by the fundus camera C2 and the electrogram of the eyeball, conventionally they have been measured and observed at different times using independent detection devices.

The purpose of the present invention is to simultaneously detect these two pieces of information,
Our goal is to provide a fundus camera capable of electrophysiological diagnosis, which allows accurate physiological diagnosis by making the fundus image and electroretinogram correspond to harmful birds by recording on the same recording medium. , the gist of which is an optical system that projects a fundus image by irradiation from a light source, a means for imaging a lamina electrogram caused by optical stimulation from a light source, and an optical system that projects the ms-converted lamina electrogram. and means for recording the projected fundus image and the electroretinogram on the same image recording medium.

The present invention' will be explained in detail based on two illustrated embodiments.

FIG. 1(a) shows a basic explanatory diagram of the bottom camera capable of electrophysiological diagnosis according to the present invention.
The lens device in front of l is a nine-eyed hawk camera, and sequentially along the optical axis from the side of the eye to be examined l, an objective lens 1, a perforated mirror 2, a photographic diaphragm) 3, a focusing lens 4, an imaging lens 5, and a quick release lens. A return mirror 6 is arranged. Figure 1 6 =
As shown, a condenser lens 7, an optical path folding mirror 8, and an eyepiece lens 9 are arranged on the reflective side of the quick return mirror 6, which is descending as shown in FIG. Fundus 1 in eye E to be examined! It is stored so that it can be observed. On the other hand, III light from a halogen lamp 10 serving as observation illumination or a xenon tube 11 serving as photographing illumination enters the perforated mirror 2 to illuminate the inside of the test area E. This llI hawk illumination optical system starts with a No. 10 rodan lamp, moves toward a perforated mirror 2, and sequentially goes through a condenser lens 12, a xenon tube 11, and another condenser lens 1.
3. An annular slit plate 14 and an optical path bending 5-tooth 15 are arranged, and the illumination light from the no-tagen-zump 10 or the middle upper non-tube 11 is refracted by the mirror 15 and passes through the filter 1.
6. The aperture 17 and the perforated mirror 2 via the relay lens 1B.
(Two people are illuminated. The halogen lamp 10 is designed to be able to stop emitting light as needed to create a dark-adapted state. Also, the diaphragm 17 is linked with the focusing lens 4 for adjusting the diopter. In addition to the fact that the aperture diameter can be changed from the outside of the device and that it can be moved in the plane perpendicular to the optical axis, the field of view of the fundus Ef can be changed. The slit plate 14 has a ring slit 14Jl shown in Fig. 1 (6) in order to remove the reflection of the cornea E. A reference position conjugate to the pupil of the subject @E is placed through an optical system, and a halogen lamp 10 is placed.
The emitted light from the xenon tube 11 is transmitted through the condenser lens 12.1.
5, the light is once focused onto the slit plate 14. Further, the filter 16 is inserted into the illumination optical system as necessary, and by using various color filters or bandpass filters, it is possible to apply arbitrary spectral stimulation to the subject @E.

Also, at the corner lI[E, , of the test @E, there is a first electrode 1! made of a metal shaft! The contact lens 20 with a hole on the inner surface is attached to the contact lens (2), and the skin (2) is attached to the skin (2)
The potential difference caused by the light stimulation of the middle senon tube 11 between the electrode 21 and the electrode 21 is amplified by 224 and displayed as an image on the oscilloscope 25.

Due to the action of the contact lens 20 in the nine-point position, the optical position moves as seen by the subject, so that the light source is placed on the slit plate 14 or the light source facing the ground. It moves along its optical axis in the direction of the electric lens 15. Also, the imaging position 4 of the normal section where the intermediate image of the fundus 1 is formed moves along with the optical system on the side. 7
Displace the focal point 1111 of the focusing lens 4 accordingly, or use a negative lens for position maintenance (stop) S and the focusing lens 4. After inserting and focusing, turn on the Zokinino Rogen lamp 10. Then, the light emitted from the lamp 10 passes through the ring slit 14 of the slit plate 1"4.
1 is irradiated, subjected to imaging action by the relay lens 18, reflected by the perforated mirror 2, and once the light beam of the ring slit 14M is formed. Furthermore, the illumination light is imaged onto the pupil by the objective lens 1) and illuminates the fundus B. In this case, if the contact lens 20 is present, the illumination light will illuminate a wide angle of view (=fundus B).Next, the fundus 1!

When the light beam emitted from the object @E exits from the test subject @E, it is convergently refracted by the contact lens 20, and is directed by the objective lens 1 to the intermediate point I between the objective lens 1 and the perforated mirror 2:
Image Ef1 is intermediately imaged. This intermediate image 1i1,1
The luminous flux that has formed is apertured by a second-class lens 3), and is focused by a focusing lens 4 and a relay lens 5C:. This image is visually viewed by an observer e via a quick return mirror 6, a condenser lens 7, an optical path bending mirror 8, and an eyepiece lens 9.

Also, when the loxenon tube 11 is turned on in place of the halogen lamp 10 momentarily and the quick return mirror 6 is raised and moved out of the optical path, the eye 1 image is formed behind the quick return mirror 6 as images B and 2. 1, photographic film 24
exposed to light. On the other hand, on one side of the oscilloscope 23,
The potential of the cornea due to light stimulation based on the flash light of the xenon tube 11 is detected by the first and second electrodes 19, 214-, and this potential, that is, the electroretinogram is imaged).

Fig. 2 is a configuration diagram of a fundus camera according to the present invention ζ. The same reference numerals as in Fig. 1 indicate the same parts and members, and the illumination optical system in Fig. 1 is omitted in the drawing. ing. However, 17' is a master having a desired shape, such as a semicircular shape or a plurality of openings, and is replaceable and detachable.
In the inserted state, it moves in the optical axis direction in conjunction with the focusing lens 4, and can also be displaced within a straight line along the optical axis. An instant development camera 25 is arranged behind the return mirror 6, and this camera 25 has a field lens 26, a photographing lens 27, and an instant development film 28. On the other hand, electrode 19.21 (:yo)
The nine electroretinograms obtained are converted into an image (by using the oscilloscope 2 ink shown in FIG. It has become so.

Therefore, one instant development film 28 of the camera 25 has:
Figure 6 (31), (b) t: Shown 41 Bottom 6.
2 and the electroretinogram 63 are imprinted, and are immediately converted into an image, allowing diagnosis of fundus diseases etc. to be made quickly and extremely accurately.

In the above-mentioned embodiment, the subject's eye E wearing the contact lens 20 is the subject's eye E, but the contact lens 2
It's 9 naked eyes with 0 off, so there's no problem with the 4 shooting salary. Also, a camera 25 for instant development film is used as an image recording medium.
However, there is of course no problem with using ordinary film, and you can also use a VTR.Furthermore, the projection of both images onto the camera 25 is done by refraction by a reflecting mirror off the main optical axis. It is also possible to imprint the image using an optical fiber. For electroretinogram imaging, instead of the cathode ray tube 29, it is also possible to use a thin panel type like a liquid crystal TV to create a shed, or use the objective lens 1.
A contact lens may be fixed at the end of the extended lens barrel, and a new objective lens may be constructed including this contact lens.

As can be explained above, the electrophysiological diagnostic method according to the present invention is possible with the sea camera, in which the electroretinogram and the electroretinogram, which are obtained independently, are associated with one recording medium. Since it can be recorded, it has great advantages in terms of diagnosis and organization.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figure 1II is a detailed explanatory diagram of the present invention, Figure 2 is a configuration diagram of the Kumamaro Mela according to the present invention, and Figure 11IE6 is a detailed explanatory diagram of the present invention.
This is a 7-ilm image obtained at Maro★Mera. 1 is an objective lens, 2 is a perforated mirror, 6 is an aperture, 4 is a focusing lens, 6 is a tight return two, 10
11 is a xenon tube, 14 is a slit plate, 17 is an aperture, 2o is a contact lens, 25 is a camera, 28 is an instant development film, 29 is a cathode ray tube, 3o
is the projection lens, l is the subject's temperature, and B is the fundus.

Claims (1)

[Scope of Claims] t. An optical system for projecting a fundus image based on irradiation from a light source; a means for imaging a membranous electrogram based on optical stimulation from a light source; and an imaged electroretinogram. and a means for recording the projected image and the electroretinogram in the same image recording medium. fundus camera. i. An LL hawk camera capable of electrosurvival diagnosis according to claim 1, wherein the means for recording the image is a camera having a film. & One of the electrodes of the means for imaging the membrane electrogram is attached to a nine-contatatolens having power.