SU114666A1 - Fundus imaging instrument - Google Patents

Description

Instruments commonly used for photographing the fundus are equipped with illuminators that use the visible part of the spectrum. Ophthalmoscopic devices with an electron-optical converter that are used to inspect the fundus under infrared illumination are also known. The lack of simultaneous examination of the fundus and its photographing both in the visible and in the infrared part of the spectrum limits the range of use of ophthalmoscopy and fundus photography.

The described design of the device does not have this disadvantage.

The proposed device is made using two illuminators, one of which provides illumination with visible rays, and the second - the infrared part of the spectrum. The optical system allows both illuminators to be used, for example, by targeting under infrared illumination and photographing under visible illumination or vice versa.

The drawing shows a diagram of the device.

The double illuminator / consists of a lamp 2, whose light through a condenser 5, a prism 4, aperture 5, an infrared filter 6 and a lens 7 is reflected by a mirror 8 in position a and prism 9 is thrown into the eye 10, illuminating the retina //. The second half of the illuminator has a lamp 12, which creates a beam of visible light that illuminates the mesh sheath through the optical components 13 and the prism 9 when the mirror 8 is tilted up

After focusing, which gives the image of the retina / or photocathode of the electron-optical converter to coincide with the plane of the film 23 of the cassette 24, the ocular fundus is observed, which is carried out by an optical system consisting of parts 14-21 in visible light and using electronic the optical transducer 22 in the infrared part of the controller. At the time of the exposition, the mirror: About 20 is translated into position, i.e. a. To set the examined eye in the desired position, the device has a fixation device consisting of a moving light

points 25 and a translucent mirror 26-

Subject invention

The device, for, .- |) .9 of the fundus of the fundus, composing from the lighting and photographic parts, characterized in that, in order to expand the possibilities of photographic research

the fundus of the fundus and for taking photographs without medical expansion of the pupil, it uses systems that are updated in the visible and infrared parts of the spectrum, as well as an electron-optical converter, the photocathode of which is conjugated to the plane of the emulsion of the film, and for illumination at the time of exposure uses a lamp instant action