CN102499632A

CN102499632A - Ocular anterior segment detection and illumination system

Info

Publication number: CN102499632A
Application number: CN2012100014927A
Authority: CN
Inventors: 沈激
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-05
Filing date: 2012-01-05
Publication date: 2012-06-20

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

Anterior ocular segment detects illuminator

Technical field

The present invention relates to a kind of ophthalmic medical optical device, relate in particular to a kind of novel anterior ocular segment and detect illuminator.

Background technology

Slit lamp microscope is the most used a kind of optical device of ophthalmology, is mainly used in that to observe eyelid, conjunctiva, sclera, cornea, anterior chamber, iris, pupil, crystalline lens and vitreous body preceding 1/3, and then the position of definite pathological changes, character, size and the degree of depth thereof.Slit lamp microscope lighting source at present commonly used comprises two kinds of light source and following light sources, and it mainly adopts mechanical system control crack width, shape, direction and color etc., and this control mode has drawback: (1) is owing to exist the gap between the apertured plate and the crack edge of a knife; Therefore, when projecting to focusing rod (projecting to eyeball surface during real work), because the difference of object plane; Cause picture not on same focal plane, promptly when the crack was clear, the hot spot periphery was fuzzy; During real work; When slit image inspection clearly was transformed into the small light spot inspection, small light spot blured, and needed focusing again.(2) the crescent moon platform of control crack direction of rotation small skew occurs after in the transportation of being everlasting, being given a shock, thereby causes crack width when rotation direction to change, and quality is observed in influence.(3) the crack edge of a knife must be polished very sharply, thereby makes the slit image edge clear not have burr, if thicker, also diffraction possibly occur, makes the slit image edge rainbow phenomena occur, causes the observation downgrade; Require the control slit image narrow more good more during narrow crack, but because the trueness error of frame for movement, general minimum crack can only reach 0.1mm at present, and that can't do is narrower.(4) because the pure frame for movement that adopts; Causing service time, there was a mechanical failure long slightly or transportation vibrations back; Similar crack is stuck can't be closed, the crack is closed automatically, the crack big or small first-class mechanical breakdown influence occurs and uses, even obvious fault do not occur, but because the mechanical structure parts complex structure; One's name is legion; The not high or transportation vibrations cause of precision during process and assemble, but even cumulative error appears after the very high numerous parts combinations of machining accuracy, not good situation of feel or feel concordance are relatively poor in the time of also can occurring using.(5) light filter is adopted in color control, because that light filter adds color sintering precision requirement in man-hour is very high, aberration often occurs, thereby still has part HONGGUANG to see through when causing normally fluorescence excitation perhaps to require complete filter red, causes the inspections and examinations mistake.(6) owing to adopt the mechanical blades mouth mechanism, can only appear a crack at every turn, when the patient has the above sufferer in two places, can only observe respectively through moving slit lamp.Simultaneously, traditional slit lamp can only check with crack and hot spot mode, so function is confined to observe, and do not have measurement function.

Summary of the invention

The objective of the invention is to deficiency of the prior art, propose a kind of novel anterior ocular segment and detect illuminator.

For realizing the foregoing invention purpose, the present invention has adopted following technical scheme:

A kind of anterior ocular segment detects illuminator, comprises light source, and the condenser lens, LCD panel unit or the digital light treatment facility that distribute successively along the source light exit direction, projectoscope group and reflecting mirror down, and said LCD panel or digital micro-mirror unit are connected with control unit.

Said LCD panel unit comprises R, G, the trichroism LCD panel of B.

Said control unit comprises computer system.

Said control unit also with game paddle, mouse and keyboard at least a controlling equipment be connected.

Said condenser lens and the coaxial setting of following projectoscope group.

The present invention will be based on the LCD of liquid crystals transmit imaging or DLP (the digital light processor that forms images according to luminous reflectance; The digital light treatment facility) is placed on the position, crack; Duty through control LCD and DLP; Realization utilizes optical projection system will look like to project on the focal plane to the adjustment of crack shape, direction, color etc. then, reaches the effect of observing illumination.

Below in conjunction with the operation principle of LCD and DLP projector, work process of the present invention and effective effect are further described:

The LCD projection is a photoelectric effect of utilizing liquid crystal, and promptly being arranged under the effect of electric field of liquid crystal molecule changes, and influences the light transmittance and the reflectance of liquid crystal cells, thereby produces the image that different gray-levels and color are arranged.This point is similar with the principle of LCD liquid crystal display.Now general is three liquid crystal board projectors, and it is to be divided into R, G, B three-beam to high light through spectroscope by a cover optical system, sees through R, G, the trichroism liquid crystal board of B respectively; Signal is through the AD conversion; Modulation is added on the liquid crystal board, through unlatching, the closure of control liquid crystal cells, thus the break-make of control light path; R, G, B light converge in prism at last, on screen, form coloured image by projection lens projects.

And the core of DLP projector is DMD (digital micro-mirror device), i.e. digital micro-mirror device.That now more common is the DLP that is made up of a slice DMD.The light that light source sends divides colour wheel through (60 revolutions per seconds) of a high speed rotating, resolves into R, G, B three coloured light of different periods, alternately penetrates on the DMD surface.DMD is made up of a lot of small eyeglasses, and each little eyeglass all can rotate freely between+12 degree and-12 degree.Input signal acts on the dmd chip after treatment, realizes the unlatching and closure of light path through the anglec of rotation of control micromirror.The R of last different periods, G, B form complete coloured image by DMD micromirror reflection back stack.

By structural design of the present invention; Only need regulate and control LCD, DLP through setting program; And then realize the image adjustment, and can form projection different, that vary in color, make the doctor carry out all kinds of observations easily; Simultaneously can two above cracks of transmission even can throw annulus, thus make slit lamp can check that corneal topography, corneal curvature etc. are used for the new function of DATA REASONING.In a word, compared with prior art, advantage of the present invention is at least:

(1) because crack and hot spot produce by liquid crystal display screen, therefore, on the focal plane similarly is complete homogeneity.And, can not occur concentric reducer or width when rotating and change in the crack

(2) colour by control units such as computing system control, can reach 64 fully, realizes RGB, and can real-time regulated, and not only color is howed much than traditional slit lamp, can more accurately control the precision of color simultaneously.

(3) because thickness of liquid crystal is extremely thin, therefore, the definition at edge, crack and solution rainbow phenomena can be accomplished fully.Because the projection system light path is a reduction system, and minimum widith can be accomplished a pixel on liquid crystal display screen, the narrowest crack can reach 0.01mm after projecting simultaneously.

(4) owing to adopt the computer system control crack, the crack that can avoid the error in transportation or assembling process to cause can't be closed, chance failure is closed or the like in crack downgrade or crack automatically.

(5) preferred, adopt control unit with game paddle, mouse-keyboard etc., when controlling, can avoid producing the not good or inconsistent phenomenon of feel that the precision cumulative error causes in the assembling.

Description of drawings

Fig. 1 is the structural representation of the present invention's one preferred embodiment;

Wherein each assembly and Reference numeral thereof are respectively: light source 1, condenser lens 2, LCD panel unit 3, last projectoscope group 4, following projectoscope group 5, reflecting mirror 6 and eyeball position 7.

The specific embodiment

Below in conjunction with an accompanying drawing and a preferred embodiment technical scheme of the present invention is further described.

Consult Fig. 1; This anterior ocular segment detects illuminator and comprises light source 1 and the condenser lens 2 that distributes successively along the source light exit direction, LCD panel unit 3, goes up projectoscope group 4 (can select for use according to actual needs), following projectoscope group 5 and reflecting mirror 6; Said LCD panel is connected with control unit, and its duty is controlled by control unit.

Said condenser lens, upward projectoscope group and the coaxial setting of following projectoscope group.

Said LCD panel unit can be selected R, G, the trichroism LCD panel of B for use, but also can preferably adopt the above LCD panel of four colors.

Said control unit comprises computer system, this computer system also with game paddle, mouse and keyboard at least a controlling equipment be connected.

Aforementioned light source can be luminaires such as Halogen light, LED, but is not limited thereto.

The advantage that this anterior ocular segment detects illuminator is:

Although embodiment of the present invention are open as above; But it is not restricted to listed utilization in description and the embodiment; It can be applied to various suitable the field of the invention fully, for being familiar with those skilled in the art, can easily realize other modification; Therefore under the general concept that does not deviate from claim and equivalency range and limited, the legend that the present invention is not limited to specific details and illustrates here and describe.

Claims

1. an anterior ocular segment detects illuminator; Comprise light source; It is characterized in that it also comprises condenser lens, LCD panel unit or digital light treatment facility, following projectoscope group and the reflecting mirror that distributes successively along the source light exit direction, said LCD panel or digital micro-mirror unit are connected with control unit.

2. anterior ocular segment according to claim 1 detects illuminator, it is characterized in that, said LCD panel unit adopts trichroism above LCD panel.

3. anterior ocular segment according to claim 1 detects illuminator, it is characterized in that said control unit comprises computer system.

4. anterior ocular segment according to claim 1 detects illuminator, it is characterized in that, said control unit also with game paddle, mouse and keyboard at least a controlling equipment be connected.

5. anterior ocular segment according to claim 1 detects illuminator, it is characterized in that said condenser lens and the coaxial setting of following projectoscope group.