Ocular anterior segment detection and illumination system

Abstract

The invention discloses an ocular anterior segment detection and illumination system, comprising a light source as well as a light condensing mirror, a R, G and B (red, green and blue) three-color liquid crystal sheet unit or a digital light processor (DLP), a lower projecting mirror group and a reflecting mirror, which are sequentially distributed in an emerging direction of light rays of a light source, wherein the light condensing mirror and the lower projecting mirror group are coaxially arranged, and a liquid crystal sheet or a digital micromirror unit is connected with a control unit. The control unit comprises a computer system, preferentially, the computer system is also connected with at least one control device of a game control rod, a mouse and a keyboard. The ocular anterior segment illumination system is simple in structure, easy to control, has high stable property and high image quality and can achieve new functions for data measurement such as measurement of corneal topography, corneal curvature and the like.

Description

technical field [0001] The invention relates to an ophthalmic medical optical device, in particular to a novel anterior segment detection lighting system. Background technique [0002] Slit lamp microscope is the most frequently used optical equipment in ophthalmology. It is mainly used to observe eyelid, conjunctiva, sclera, cornea, anterior chamber, iris, pupil, lens and anterior 1 / 3 of vitreous body, and then determine the location, nature and size of lesions. and its depth. At present, commonly used slit lamp microscope illumination sources include upper light source and lower light source, which mainly control the width, shape, direction and color of the slit by mechanical means. This control method has the following defects: (1) due to the There is a gap between them. Therefore, when projected onto the focus stick (projected to the surface of the eyeball during actual work), the image is not on the same focal plane due to the difference in the object plane. That is, w...

AI Technical Summary

Problems solved by technology

At present, commonly used slit lamp microscope illumination sources include upper light source and lower light source, which mainly control the width, shape, direction and color of the slit by mechanical means. This control method has the following defects: (1) due to the There is a gap between them. Therefore, when projected onto the focus stick (projected to the surface of the eyeball during actual work), the image is not on the same focal plane due to the difference in the object plane. That is, when the crack is clear, the periphery of the spot is blurred. , when the clear crack image inspection is converted to the small spot inspection, the small spot is blurred and needs to be refocused

(2) The crescent platform that controls the rotation direction of the crack is often slightly tilted after being shaken during transportation, which causes the width of the crack to change in the direction of rotation, affecting the quality of observation

(3) The edge of the fissure must be polished very sharply so that the edge of the fissure image is clear without burrs. If it is thicker, diffraction may occur, causing a rainbow phenomenon to appear on the edge of the fissure image, resulting in a decline in the observation quality; The narrower the better, but due to the precision error of the mechanical structure, the minimum crack can only reach 0.1mm at present, and it cannot be made narrower

(4) Due to the purely mechanical structure, the use time is a little longer or mechanical failure occurs after transportation vibration, such as cracks stuck and unable to close, cracks automatically closed, cracks appear large and small, etc. Mechanical failures affect the use, even if there is no obvious failure, but due to The structure of the mechanical structure parts is complex, the number is large, the precision of processing and assembly is not high or the reason of transportation vibration, even the processing precision is very high, but there will be cumulative errors after the combination of many parts, and there will be poor hand feeling or poor hand feeling consistency during use.

(5) Color filters are used for color control. Since the color sintering accuracy is very high during color filter processing, color differences often occur, resulting in the failure to excite fluorescence normally or requiring some red light to pass through when completely filtering red, resulting in observation and diagnosis. mistake

(6) Due to the mechanical knife-edge mechanism, only one slit can be revealed at a time. When the patient has more than two diseases, they can only be observed separately by moving the slit lamp.

At the same time, traditional slit lamps can only be inspected in the form of slits and spots, so the function is limited to observation and has no measurement function

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