SU1457895A1 - Apparatus for reveaing anomalies of color vision - Google Patents

Abstract

The invention relates to medical technology, in particular to devices for examining the eye. The purpose of the invention is to increase accuracy and reduce research time. The device contains a test channel with a light source 1, a composite three-color light filter 12 of the equal sectors of the red 13, green 14 and blue 15 reference colors and a test screen 17, as well as a replaceable chromaticity diagram 26 and a marking marker 28. In addition, the device has an optical a comparison channel with a composite neutral light filter 23 installed near the aperture

Description

one

The invention relates to medical technology, in particular to devices for examining the eye, and can be used to detect color vision abnormalities in ophthalmic and other medical institutions.

The aim of the invention is to improve the accuracy and reduce the research time.

The drawing shows the overall functional diagram of the described device.

The device contains two optical channels: a test and a comparison channel. The test channel includes: light source 1, photometric ball 2, condenser 3, field diaphragm 4, beam splitting mirror 5, mirrors 6-8, projection lenses 9, 10, aperture diaphragm 11, composite tricolor filter 12 made of red colored glass 13, green 14 and blue 15 colors, frame 16 of the composite three-color filter and observation screen 17 .. The comparison channel contains: mirrors 18, 19, projection lenses 20, 21, aperture diaphragm 22, composite neutral filter 23 in the frame 24, screen 25 compare.

The device also has a replaceable chromaticity diagram 26 in the frame 27, a marking marker 28, a support plate -29, guides 30 of the support plate and handles 31, 32. A composite three-color filter 12, a composite neutral filter 23, a replaceable chromaticity diagram 26 are fixed in The rims 16, 24, 27 with serrated rims, coupled to one another, are mounted on the plate 29 with

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rotating around the axes of the frames and moving the plate 29 along the guide 30 with the help of the handles 31, 32 with gear gears. The marking marker 28 is placed above the chromaticity diagram 26 and is fixed to the device body.

The colored glass of which the sectors of the composite three-color filter 12 are made, have reference colors — red, green, and blue. The spectral transmittances of these glasses are chosen in such a way that the light fluxes passing through them are in such a ratio that in the position when the center of the diaphragm 11 is located on the optical axis of the projection system, the color on the screen 17 is white.

The operation of the device is based on determining the value of the first color threshold as different from white.

The device works as follows.

The light flux from the source of light 1, passing through the condenser 3, illuminates the field diaphragm 4, then the beam-splitting mirror 5 divides it into two beams - reflected and transmitted. Using mirrors 6, 7, the reflected light beam is directed onto the first projection lens 9 of the test channel and, after being converted into a parallel light beam, illuminates the composite three-color filter 12. The light beam passing through the colored glass of the filter 12,,. the aperture diaphragm 11 and the second projection lens 10, with the help of the mirror 8, are directed to the screen 17, where, mixing, colors the screen.

in this case, the chromaticity of the screen will be determined by the ratio of the light fluxes that have passed through limited regions of colored glass.

The light beam transmitted by the light-reflecting mirror 5 is directed by the mirror 18 to the first projection

degree of color vision anomalies

the subject,

F o r mula inventions

A device for detecting color vision anomalies, containing an optical test channel with a light source that is a composite tricolor

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Lens 20 of the comparison channel and, pro-, about a filter of equal area

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A through the neutral composite filter 23, the aperture diaphragm 22 and the second projection lens 21, with the help of the mirror 19 is directed to the comparison screen 25. The color of this screen remains 15 white.

Three sectors of red, green, and blue reference colors and an observable screen, as well as a replaceable chromaticity diagram and a marking marker, which, in order to increase accuracy and shorten the study time, it is equipped with an additional optical channel of comparison with a composite neutral a light filter installed near the aperture diaphragm, projection lenses and a white screen comparing a white one, the composite neutral light filter sinking out

When the composite three-color filter 12 is moving perpendicular to its rim axis, the color of the screen 17 ° changes. When filter 12 is moving from its original position, when screen 17 is white, the observer, having first noticed the color of screen 17,

Three sectors of red, green and blue reference colors and an observational screen, as well as a replaceable chromaticity diagram and a marking marker, characterized in that, in order to increase accuracy and shorten the study time, it is equipped with an additional optical reference channel with a composite neutral filter mounted near the aperture diaphragm, projection lenses and a comparison screen of white color, moreover, the composite neutral filter is made of

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makes a mark on the diagram 26 color - 25 equal to three sectors of equal area

using a marking device-neutral glasses with integral

28. The shift of the center of the filter with 12 transmittance coefficients, respectively, in one or the other direction is equal to the integral coefficients of the plane, perpendicular to the axis, and the transmittance of the colored walls, to determine the thresholds. Difference from white color of the composite three-colored light color in the whole color range and on the chromaticity diagram 26, obtain a system of points, outlining the area of colors that are not distinguished by the data of the observation filter, while the rims of both light filters are made with the possibility of their simultaneous rotation around their axes and synchronous on linear variable - .iiixJ A jT rfiz-A IF 4. J D1C L / CMC

dated by white. By input of this communication perpendicular to the axis jointly, the region can be judged on the nature of the character and the use of this information. ,. „

with chrome frame rim,

1457895

degree of color vision anomalies in

the subject,

F o r mula inventions

A device for detecting color vision anomalies, comprising an optical test channel with a light source composed of three-color

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equal-area light filter

three sectors of red, green and blue reference colors and an observational screen, as well as a replaceable chromaticity diagram and a marking marker, characterized in that, in order to increase accuracy and shorten the study time, it is equipped with an additional optical channel of comparison with a composite neutral light filter installed near the aperture diaphragm, projection lenses and a comparison screen in white, with the composite neutral filter sinking out of

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three equal area sectors from

the count of the composite three-color filter; the rims of both filters are made with the possibility of their simultaneous rotation around their axes and synchronous linear variable - .iiixJ A jT rfiz-A IF 4. J D1C L / CMC

The perpendicular axes are jointly used. ,. „

Puzzles perpendicular to the axis of the sov n pppzpg. u, t „from o.„. ,. „

with chrome frame rim,

Claims (1)

Claim A device for detecting color vision anomalies, comprising an optical test channel with a light source, a composite three-color 10 light filter of three equal sectors of red, green and blue reference colors and an observation screen, as well as a replaceable color chart and marker, 15 characterized in that In order to increase the accuracy and reduce the study time, it is equipped with an additional optical comparison channel with a composite neutral 20 filter installed near the aperture diaphragm agma, projection lenses and a white comparison screen, and the composite neutral filter is made up of 25 three equal-sized sectors of neutral glasses with integral transmittance, respectively equal to the integral transmittance of color glass 30 glasses of a composite three-color filter, while the frames of both filters are made with the possibility their synchronous rotation around their axes and synchronous linear movement perpendicular to the axes together with the frame of the color diagram awns. Compiled by Y. Tsepelev Editor A. Makovskaya Tehred L. Serdyukova Corrector M. Demchik : Order 1272 Circulation 644 Subscription VNIIIPI State 113035, Committee for Inventions and Discoveries under the USSR SCST Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and Publishing Plant Patent ” Uzhhorod, st. Gagarina, 101