CN109870874A - A kind of novel semi-conductor laser light source disappears Speckles Technique - Google Patents
A kind of novel semi-conductor laser light source disappears Speckles Technique Download PDFInfo
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- CN109870874A CN109870874A CN201910226315.0A CN201910226315A CN109870874A CN 109870874 A CN109870874 A CN 109870874A CN 201910226315 A CN201910226315 A CN 201910226315A CN 109870874 A CN109870874 A CN 109870874A
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Abstract
Disappear Speckles Technique the present invention relates to a kind of novel semi-conductor laser light source, in Projection Display illumination path of the semiconductor laser array as light source, diffusion sheet in parallel light path is moved in the convergence optical path of glass bar inlet, a piece of diffusion sheet is only set in entire optical path, and the angle of divergence of the diffusion sheet is at 5-6 °.The present invention can be effectively reduced the coherence of light source, inhibit speckle, mention high display quality while guarantee laser display wide colour gamut.
Description
Technical field
Disappear Speckles Technique the present invention relates to one kind, and in particular to a kind of laser light source dissipation spot method.
Background technique
Conventional projectors using high-pressure sodium lamp as light source, light source life is short, and projected image colour gamut is small, and saturation degree is low,
It gradually can not meet demand of the people to color.Laser light source has the service life long, can express limit color, projected image high definition
The advantages that clear degree, high contrast, in Projection Display industry using more and more extensive.
Semiconductor laser is small in size compared to other solid state lasers, and it is the perfect light source of laser display that photoelectric efficiency is high.
At present feux rouges and blue light laser diode all can volume production, single tube power has reached a watt rank；Green (light) laser is also
It makes great progress, these development are all laid a good foundation for semiconductor laser for laser display field.But laser has
High coherence results in laser projection and shows obvious disadvantage: speckle phenomena.Speckle phenomena has seriously affected perspective view
Image quality amount is that laser projection shows one of the problem for having to solve.
It is proposed in patent CN101063519A through the structure of laser array fiber coupling and eliminates the illumination of speckle
System.Array laser is coupled using multifiber in this system, although speckle can be inhibited to a certain extent, so
And to reach preferable effect, required subnumber mesh is more, will cause the increase of volume and the reduction of the efficiency of light energy utilization.These
The large-scale application for the laser display that factor all limits.
Method more common at present is that diffusion sheet is embedded in parallel light path, although this method can desalinate speckle, is improved
The uniformity of picture, but also have the shortcomings that it is one big be the increase due to laser beam divergence and make to be emitted spot diameter and increase, but
Ray machine inlet diameter be it is certain, luminous energy output just increase loss in the interface of light source and ray machine.
Summary of the invention
Goal of the invention: purpose of the invention is to overcome the shortcomings in the prior art, provide it is a kind of can guarantee laser
While showing wide colour gamut, the coherence of light source can be effectively reduced, inhibit speckle, the novel semi-conductor for mentioning high display quality swashs
Radiant disappears Speckles Technique.
Technical solution: in order to solve the above-mentioned technical problem, a kind of novel semi-conductor laser light source dissipation of the present invention
Spot technology moves the diffusion sheet in parallel light path in Projection Display illumination path of the semiconductor laser array as light source
Into the convergence optical path of glass bar inlet, a piece of diffusion sheet is only set in entire optical path, and the angle of divergence of the diffusion sheet is in 5-
6°。
The distance between the diffusion sheet and light source are within 5mm and 5mm.
Reduce hot spot by diffusion sheet.
The diffusion sheet is fixed.
By the application of optical Design, diffusion sheet influence of the position of condenser system to emergent light spot diameter very
Greatly.Traditional approach is diffusion sheet to be placed in parallel light path, but this can increase the diameter of emergent light spot, makes the energy of peripheral field
Loss is increased, the raising of energy output is unfavorable for.
It is found by calculating, diffusion sheet is placed near light-source system image space hot spot, emergent light spot diameter can be reduced, made
The luminous energy of peripheral field more enters subsequent optical system, improves the energy output of system.
The utility model has the advantages that compared with prior art, the present invention its remarkable advantage is: the present invention is by the diffusion in parallel light path
Piece moves on in the convergence optical path of glass bar inlet, and the angle of divergence of such diffusion sheet can be increased to 5-6 ° by 1-2 °, by a piece of
The diffusion sheet of the big angle of divergence replace the diffusion sheet of two panels small divergence angle and hot spot there are also 15% reduction, main function is to reduce
The emergent light spot diameter of projection lighting light source module improves the energy output of lighting system, and can guarantee laser display
While wide colour gamut, the coherence of light source can be effectively reduced, inhibits speckle, mentions high display quality, enable Solid State Laser side
Just in the projection display system application of small size, calculated by optimization, can calculate diffusion sheet from light entrance it is specific away from
From the hot spot for making light enter light inlet is minimum, to improve the efficiency of light source to the maximum extent.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated.
Embodiment 1
A kind of novel semi-conductor laser light source of the present invention disappears Speckles Technique, in semiconductor laser array as light source
In Projection Display illumination path, the diffusion sheet in parallel light path is moved in the convergence optical path of glass bar inlet, in entire light
A piece of diffusion sheet is only set in road, and the angle of divergence of the diffusion sheet is 5 °, and the distance between the diffusion sheet and light source are in 3mm, institute
It is fixed to state diffusion sheet.
Embodiment 2
A kind of novel semi-conductor laser light source of the present invention disappears Speckles Technique, in semiconductor laser array as light source
In Projection Display illumination path, the diffusion sheet in parallel light path is moved in the convergence optical path of glass bar inlet, in entire light
A piece of diffusion sheet is only set in road, and the angle of divergence of the diffusion sheet is 6 °, and the distance between the diffusion sheet and light source are in 4mm, institute
It is fixed to state diffusion sheet.
The present invention is to move on to the diffusion sheet in parallel light path in the convergence optical path of glass bar inlet, such diffusion sheet
The angle of divergence can be increased to 5-6 ° by 1-2 °, the light by the diffusion sheet of the diffusion sheet substitution two panels small divergence angle of a piece of big angle of divergence
For spot there are also 15% reduction, main function is the emergent light spot diameter for reducing projection lighting light source module, improves lighting system
Energy output, and can effectively reduce the coherence of light source while guaranteeing laser display wide colour gamut, inhibit to dissipate
Spot mentions high display quality, and Solid State Laser is enable easily in the projection display system application of small size, to calculate by optimization, can
With calculate diffusion sheet from light entrance it is specific with a distance from, the hot spot for making light enter light inlet is minimum, to mention to the maximum extent
The efficiency of high light source.
The present invention provides a kind of thinking and methods, and there are many method and the approach for implementing the technical solution, the above institute
Stating is only the preferred embodiment of the present invention, it is noted that for those skilled in the art, is not being departed from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications also should be regarded as guarantor of the invention
Range is protected, all undefined components in this embodiment can be implemented in the prior art.
Claims (4)
- The Speckles Technique 1. a kind of novel semi-conductor laser light source disappears, it is characterised in that: in semiconductor laser array as light source Projection Display illumination path in, the diffusion sheet in parallel light path is moved in the convergence optical path of glass bar inlet, entire A piece of diffusion sheet is only set in optical path, and the angle of divergence of the diffusion sheet is at 5-6 °.
- The Speckles Technique 2. novel semi-conductor laser light source according to claim 1 disappears, it is characterised in that: the diffusion sheet with The distance between light source is within 5mm and 5mm.
- The Speckles Technique 3. novel semi-conductor laser light source according to claim 1 disappears, it is characterised in that: made by diffusion sheet Hot spot reduces.
- The Speckles Technique 4. novel semi-conductor laser light source according to claim 1 disappears, it is characterised in that: the diffusion sheet is solid It is fixed motionless.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910226315.0A CN109870874A (en) | 2019-03-25 | 2019-03-25 | A kind of novel semi-conductor laser light source disappears Speckles Technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910226315.0A CN109870874A (en) | 2019-03-25 | 2019-03-25 | A kind of novel semi-conductor laser light source disappears Speckles Technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109870874A true CN109870874A (en) | 2019-06-11 |
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ID=66921142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910226315.0A Pending CN109870874A (en) | 2019-03-25 | 2019-03-25 | A kind of novel semi-conductor laser light source disappears Speckles Technique |
Country Status (1)
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102402112A (en) * | 2011-11-30 | 2012-04-04 | 海信集团有限公司 | Light source device, light source generation method and laser projector having same |
| CN106291965A (en) * | 2016-08-26 | 2017-01-04 | 湖北久之洋红外系统股份有限公司 | A kind of without speckle tricolor laser light source and laser projection system |
| CN106444245A (en) * | 2016-08-26 | 2017-02-22 | 湖北久之洋红外系统股份有限公司 | Speckle-free three-primary-color laser light source |
-
2019
- 2019-03-25 CN CN201910226315.0A patent/CN109870874A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102402112A (en) * | 2011-11-30 | 2012-04-04 | 海信集团有限公司 | Light source device, light source generation method and laser projector having same |
| CN106291965A (en) * | 2016-08-26 | 2017-01-04 | 湖北久之洋红外系统股份有限公司 | A kind of without speckle tricolor laser light source and laser projection system |
| CN106444245A (en) * | 2016-08-26 | 2017-02-22 | 湖北久之洋红外系统股份有限公司 | Speckle-free three-primary-color laser light source |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190611 |