WO2012149885A1

WO2012149885A1 - A microscopic slit system and method

Info

Publication number: WO2012149885A1
Application number: PCT/CN2012/074870
Authority: WO
Inventors: 严苏峰; 魏悦; 于航; 陈文光; 孔昭松
Original assignee: 上海美沃精密仪器有限公司
Priority date: 2011-05-03
Filing date: 2012-04-28
Publication date: 2012-11-08
Also published as: CN102768403A

Abstract

Disclosed is a microscopic slit system for a slit lamp microscope in ophthalmologic examinations, comprising: a light source (1), a collimating unit (2), a polarizing unit (3), a microdisplay chip (4), a driver unit (5) for the microdisplay chip, a polarization detecting unit (6), and a projecting unit (7). The driver unit (5) for the microdisplay chip drives the microdisplay chip (4) to form a slit, replacing the slit knife in an existing slit lamp and simplifying the installation and usage thereof, and making the adjustment of the size, shape, light intensity and colour of the generated image more convenient.

Description

Micro-display crack system and method

Technical field

The present invention relates to a micro-discrete system and method, and more particularly to a micro-cracking system and method for use in a slit lamp microscope.

Background technique

At present, the slit system of the slit lamp generally adopts blade switching to adjust the width and width of the crack, and the length of the crack and the spot size are realized by the diaphragm switching system, and the color conversion is realized by the color filter switching system. These switching systems have high precision requirements and are difficult to operate during production, installation and use. The manufacturing process is difficult, the cost is relatively high, and the size, pattern, color, and brightness of the cracks and spots are small, and the color scheme is relatively primitive.

The crack system technology of the existing slit lamp has the following defects:

1. The overall structure is complex, the precision of parts is strict, the production process is difficult, and the manufacturing cost is high.

2. Adjustment is not easy to install and use.

3. The crack opening is driven by the rotation of the fixed axis. The closed position and the open position of the slit blade sometimes differ, resulting in a decrease in the spot quality of the fractured image.

4. The structure space is small, the number of switchable filters is small, and the variety of light colors that can be realized is small.

5. The structure space is small, the number of switchable diaphragm sizes is small, and the types of spot shapes and sizes that can be realized are also small.

With the development of modern digital micro-display chip technology, the use of digital micro-display chips as a crack pattern and imaging thereof is expected to achieve the same effect as the crack of the existing slit lamp and make up for the defects of the existing mechanical switching system technology.

Fracture systems and methods that overcome the above drawbacks have not yet been seen on the market, and the slit blade system, the aperture switching system, and the color filter switching system of the slit lamp source portion can be integrally replaced and simplified.

Summary of the invention

The object of the present invention is to overcome the deficiencies of the existing fracture system structure, and to provide a micro-discrete system and method, which provides a new crack design through the combination of optical and microelectronic technologies, and effectively improves the crack. The complexity, reliability and ease of use of the lamp system structure.

The working principle of the present invention is to provide illumination to the microdisplay chip 4 by using the light source 1. The microdisplay chip 4 includes a digital light processing DLP chip, a liquid crystal display LCD chip, and a liquid crystal display LCOS chip can be used. By controlling the microdisplay chip 4 to control whether light can pass, a desired crack pattern is formed, and the crack pattern of the microdisplay chip 4 is visualized by the projection unit 7. The size, shape, color, and brightness of the slit pattern can be realized by the adjustment of the microdisplay chip 4 by the microdisplay chip driving unit 5.

The technical solution of the present invention is: The system comprises a light source 1, a projection unit 7, and a microdisplay chip 4 and a microdisplay chip driving unit 5; the microdisplay chip 4 is disposed between the light source 1 and the projection unit 7. After the microdisplay chip 4 is connected to the microdisplay chip driving unit 5 and driven by the microdisplay chip 4, different fissures may be formed on the microdisplay chip 4, and the microdisplay chip 4 is inside the crack. The portion may transmit or reflect light to the projection unit 7.

A collimating unit 2 may also be provided in the system; the collimating unit 2 is disposed on the optical path between the light source 1 and the microdisplay chip 4.

The microdisplay chip 4 may be a digital light processing DLP chip; the microdisplay chip driving unit 5 controls the direction of the reflected light by controlling the reflection angle of the tiny lens array in the microdisplay chip 4 to adjust the final image. The shape, size and light intensity.

A polarizing unit 3 may be disposed in the system; the polarizing unit 3 is disposed on an optical path between the light source 1 and the microdisplay chip 4; the polarizing unit 3 may be a polarizing plate or a polarization beam splitting prism .

An optical path between the microdisplay chip 4 and the projection unit 7 may further be provided with a detecting unit 6; a detecting direction of the detecting unit 6 is perpendicular to a direction perpendicular to the polarizing unit 3, The contrast of the image formed by the light is better; the detecting unit 6 may be a polarizing plate; and the image of the light intensity of the liquid crystal molecules of the microdisplay chip unit may be controlled to finally form an image of different light intensities.

The micro display chip 4 may be a liquid crystal display LCD chip; the micro display chip driving unit 5 may be a liquid crystal display LCD chip driving unit; the micro display chip driving unit 5 controls the liquid crystal molecular array in the micro display chip 4 The direction of rotation to control the on and off of the transmitted polarized light and change the polarization vertically The direction to adjust the size, shape and intensity of the resulting image.

The microdisplay chip 4 may be a liquid crystal display LCOS chip; the micro display chip driving unit 5 may be a liquid crystal display LCOS chip driving unit; the micro display chip driving unit 5 controls the micro display chip 4 The direction of rotation of the array of liquid crystal molecules controls the on and off of the reflected polarized light and changes the direction of polarization vertically to adjust the size, shape and intensity of the resulting image.

A polarization beam splitting prism 8 may be disposed on the incident and outgoing light paths of the microdisplay chip 4 to simultaneously achieve incident polarization and emission detection for the incident light and the outgoing light.

A color filter may be disposed in the microdisplay chip 4; or a color filter may be added on the light path incident or outgoing by the microdisplay chip 4 to finally form an image of a different color.

A rotating color wheel 9 may be disposed on an optical path outside the two sides of the microdisplay chip 4, and the rotating color wheel 9 is provided with a plurality of color filters of different colors; and a rotating color wheel driving unit 10 is further connected. The rotating color wheel 9 drives the rotation thereof, and the rotating color wheel driving unit 10 can also perform signal connection with the microdisplay chip driving unit 5; by the microdisplay chip driving unit 5 and the rotating color wheel The driving unit 10 performs coordinated control. When the color filter of a certain color on the rotating color wheel 9 is directly opposite to the light source 1, the microdisplay chip driving unit 5 drives the microdisplay chip 4 to adjust to a certain transmission. And the reflectance to produce a certain corresponding value of light intensity, the color intensity of the different color filters is different and the ratio is adjustable to finally form a different and adjustable image.

Compared with the prior art, the invention has significant advantages and beneficial effects, which are embodied in the following aspects:

1. The overall structure of the slit lamp is simplified and the production cost is reduced.

2. The position of the micro-display component does not change, thus ensuring the stability and reliability of the crack image quality.

3. It can realize any pattern, not limited to the limitation of the type of diaphragm.

4. A variety of colors that can be used for stepless color adjustment, regardless of the type of color filter.

5. The brightness of the crack spot can be adjusted by controlling the micro-display chip, and it is not limited to adjusting the brightness of the crack spot by adjusting the power of the light source.

6. The adjustment operation during installation is extremely simple and very precise. DRAWINGS

1 is a schematic diagram of a micro-discrete implementation system of a digital light processing DLP chip of the present invention;

2 is a schematic diagram of a micro-display crack implementation system of a liquid crystal display LCD chip of the present invention;

3 is a schematic diagram of a micro-display crack implementation system of a liquid crystal display LCOS chip according to the present invention; FIG. 4 is a schematic diagram of a micro-display slit-color implementation system of the digital light processing DLP chip of the present invention;

The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

As shown in FIG. 1-4, reference numerals 1-10 in the figure respectively indicate: a light source 1, a collimating unit 2, a polarizing unit 3, a microdisplay chip 4, a microdisplay chip driving unit 5, a detecting unit 6, and a projection unit 7 The polarization beam splitting prism 8, the rotating color wheel 9, and the rotating color wheel driving unit 10.

1 is a schematic diagram of a digital light processing DLP chip micro-fracture implementation system. The micro-display chip 4 employs a digital light processing DLP chip, and the micro-display chip driving unit 5 controls and forms a crack on the micro-display chip 4. The light emitted by the light source 1 passes through the collimating unit 2 and reaches the microdisplay chip 4. The micro mirror array in the crack actually becomes a surface light source illuminated by parallel light, and each micro mirror on the upper side The angle of the micro-display chip driving unit 5 can be controlled by the micro-display chip driving unit 5 to control whether the reflection direction of the micro-mirror array of the micro-display chip 4 reaches the control light and how much passes through the projection unit For the purpose of 7, the micro-display chip 4 forms different crack patterns, and the micro mirror array in the crack reflects the light to the projection unit 7, and the light reflected to the projection unit 7 is bright. The reflection is small and is not bright; the micro mirror array outside the slit reflects light outside the projection unit 7 without forming an image.

2 is a schematic diagram of a micro-display crack implementation system of a liquid crystal display LCD chip. The micro-display chip 4 uses a liquid crystal display LCD chip, and the micro-display chip driving unit 5 controls and forms a crack on the micro-display chip 4. After the light emitted by the light source 1 passes through the collimating unit 2 and the polarizing unit 3, the polarized light formed by the polarizing unit 3 reaches the microdisplay chip 4, and the microdisplay chip driving unit 5 Controlling the rotation direction of the liquid crystal molecules of the microdisplay chip 4 to control the on and off of the control light, showing different crack patterns, in which the polarization direction has a 90° change; the microdisplay chip 4 If the rotation direction of the liquid crystal molecules is controlled to change, the brightness of the emitted light will also change; the portion of the microdisplay chip 4 that needs to form a crack needs to control the rotation direction of the liquid crystal molecules, so that the emitted light is bright and does not need to be formed. The part of the crack needs to control the direction of rotation of the liquid crystal molecules so that the emitted light is very dark. The light passing through the micro-display chip 4 passes through the projection unit 7 to form a crack image, and different sizes and shapes of crack images are realized according to different input control signals; and the optical path behind the micro-display chip 4 is further A level detecting unit 6 may be provided, which may increase the contrast of the formed pattern and filter out stray polarized light.

3 is a schematic diagram of a system for implementing a micro-display of a liquid crystal display LCOS chip, wherein the micro-display chip 4 uses a liquid crystal display LCOS chip, and the micro-display chip driving unit 5 controls and forms a crack on the micro-display chip 4. . A polarizing beam splitting prism 8 is further disposed. After the light emitted by the light source 1 passes through the collimating unit 2 and the polarizing unit 3, the polarized light formed by the polarizing unit 3 first reaches the polarizing beam splitting prism 8. The polarization beam splitting prism 8 transmits P light, and reflects the S light to the micro display chip 4, and the micro display chip 4 reflects and converts the S light into P light and then passes through the polarization beam splitting prism 8 again. It is then refracted to the projection unit 7.

4 is a schematic diagram of a digital light processing DLP chip micro-display slitting coloring implementation system.

After the light emitted by the light source 1 passes through the collimating unit 2, the color wheel of the rotating color wheel 9 is rotated by a high-speed rotation, and the rotating color wheel driving unit 10 is further connected to drive and rotate the rotating color wheel 9. . When the microdisplay chip 4 uses a digital light processing DLP chip, the light intensity of the light passing through the projection unit 7 is controlled by controlling the reflection direction of the micromirror array of the microdisplay chip 4. By controlling the reflection direction of the micro-mirror 4 micromirror and controlling the rotation of the color wheel, the ratio of the light of the plurality of colors through the projection unit 7 can be realized, thereby achieving the color adjustment and brightness adjustment of the slit spot.

Claims

A micro-display crack system and method, comprising a light source (1) and a projection unit (7), characterized in that: a micro-display chip (4) and a micro-display chip driving unit (5) are further provided; a chip (4) disposed on an optical path between the light source (1) and the projection unit (7); the microdisplay chip (4) is connected to and driven by the microdisplay chip driving unit (5) A different crack may be formed on the microdisplay chip (4), and a portion inside the crack on the microdisplay chip (4) may transmit or reflect light to the projection unit (7).

2. The micro-display slitting system and method according to claim 1, further comprising a collimating unit (2); the collimating unit (2) being disposed at the light source (1) and the micro The optical path between the display chips (4).

The micro-display crack system and method according to claim 1 or 2, wherein the micro-display chip (4) is a digital light processing DLP chip; the micro-display chip driving unit (5) passes through a control station The angle of reflection of the tiny lens array within the microdisplay chip (4) controls the direction of the reflected light to adjust the shape, size and intensity of the resulting image.

The micro-display crack system and method according to claim 1 or 2, further characterized in that: a polarizing unit (3) is further provided; the polarizing unit (3) is disposed at the light source (1) and the The optical path between the microdisplay chips (4); the polarizing unit (3) is a polarizing plate or a polarization beam splitting prism.

The micro-display crack system and method according to claim 4, characterized in that the optical path between the micro-display chip (4) and the projection unit (7) is further provided with a detecting unit (6) The detecting direction of the detecting unit (6) is perpendicular to the positive direction of the polarizing unit (3), so that the contrast of the image formed by the light is better; the detecting unit (6) is a polarizing plate By controlling the change in the angle of rotation of the liquid crystal molecules of the microdisplay chip unit, an image of different light intensities is finally formed.

The micro-display crack system and method according to claim 4, wherein the micro-display chip (4) is a liquid crystal display LCD chip; the micro-display chip driving unit (5) is a liquid crystal display LCD chip driver The microdisplay chip driving unit (5) controls the rotation direction of the liquid crystal molecule array in the microdisplay chip (4) to control the on and off of the transmitted polarized light, and vertically changes the polarization direction to adjust the final image. The size, shape and light intensity.

The micro-display crack system and method according to claim 4, wherein the micro-display chip (4) is a liquid crystal display LCOS chip; the micro-display chip driving unit (5) is a silicon-based liquid crystal Displaying an LCOS chip driving unit; the microdisplay chip driving unit (5) controls a rotation direction of the liquid crystal molecule array in the microdisplay chip (4) to control on and off of the reflected polarized light, and vertically changes the polarization direction, Adjust the size, shape, and intensity of the resulting image.

8. The micro-display slitting system and method according to claim 7, wherein a polarization beam splitting prism (8) is disposed on the incident and outgoing light paths of the microdisplay chip (4) to simultaneously simultaneously incident light and The outgoing light achieves incident and off-shooting.

9. The microdisplay crack system and method according to claim 1, wherein a color filter is disposed in the microdisplay chip (4); or light incident or emitted on the microdisplay chip (4) Add color filters on the road to eventually form images of different colors.

10. The microdisplay crack system and method according to claim 1, wherein a rotating color wheel (9) is further disposed on an optical path outside the two sides of the microdisplay chip (4), the rotating color wheel (9) a plurality of color filters of different colors are disposed; a rotating color wheel driving unit (10) is further provided to connect the rotating color wheel (9) and drive the rotation thereof, and the rotating color wheel driving unit (10) It is also possible to perform signal connection with the microdisplay chip driving unit (5); by performing coordinated control on the microdisplay chip driving unit (5) and the rotating color wheel driving unit (10), the rotating color wheel ( 9) when a color filter of a certain color is directly opposite to the light source (1), the microdisplay chip driving unit (5) drives the microdisplay chip (4) to adjust to a certain transmittance and reflectance to generate The light intensity of a corresponding value, the color intensity of the different color filters is different and the ratio is adjustable to finally form an image with different colors and adjustable.