CN102129130A - Light source device and method for reducing speckles - Google Patents
Light source device and method for reducing speckles Download PDFInfo
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- CN102129130A CN102129130A CN2010101002082A CN201010100208A CN102129130A CN 102129130 A CN102129130 A CN 102129130A CN 2010101002082 A CN2010101002082 A CN 2010101002082A CN 201010100208 A CN201010100208 A CN 201010100208A CN 102129130 A CN102129130 A CN 102129130A
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- diffusion sheet
- light source
- optical diffusion
- lens
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Abstract
The invention discloses a light source device and a method for reducing speckles. The light source device comprises a laser light source, a lens, an optical diffusion sheet and a vibrator, wherein the laser light source is used for generating a light beam; the lens is arranged on a path of the laser beam generated by the laser light source and is used for converting the laser beam generated by the laser light source into a quasi-straight light beam; the optical diffusion sheet is arranged on a path of the quasi-straight light beam projected by the lens, and is used for scattering the light from the lens to distribute the light uniformly; and the vibrator is used for supporting the optical diffusion sheet and allowing the optical diffusion sheet to vibrate up and down. In the light source device, the light can be distributed uniformly, so that the effect of reducing the speckles is achieved.
Description
Technical field
The present invention relates to a kind of optical technology, particularly a kind of method that reduces the light supply apparatus of speckle and reduce speckle.
Background technology
Because the projection quality of projection arrangement depends on projection brightness,, just shown the high brightness and the sense of reality so select the projection light source of high-level efficiency and high colour temperature; In general, projection arrangement adopts tungsten halogen lamp, metal halide lamp, one of ultrahigh pressure mercury lamp and xenon lamp are as its light source, but these bulbs are excellent except respectively having it, outside the shortcoming, common brightness decay problem is but arranged, in addition, also cause the projection arrangement volume big, Heavy Weight, and not portative shortcoming, therefore generally speaking, also incorrect with bulb as the projection light source of projection arrangement, even it is present what resolution requirement was day by day improved, light must image in high-resolution liquid crystal panel, just each pixel separation line of liquid crystal panel is thinner, obtaining than sharp image, so must use higher source luminance, so the volume of projection arrangement also just must be bigger.Therefore, for addressing the above problem, adopted the light source of laser afterwards as projection arrangement.
Yet, general existing LASER Light Source since during the laser excitation laser light in the laser semiconductor resonant cavity photon strike the surface and can form the different interference of phase place afterwards, can produce some speckles (some incandescent points and utmost point dim spot) when making laser light be radiated at a rough surface (a for example screen) imaging, influence the using character of projection arrangement.
Summary of the invention
The objective of the invention is to provides a kind of method that reduces the light supply apparatus of speckle and reduce speckle at above-mentioned the deficiencies in the prior art.
For achieving the above object, the light supply apparatus of minimizing speckle provided by the present invention comprises at least one LASER Light Source, lens, an optical diffusion sheet and a Vib..LASER Light Source is in order to produce a light beam; Lens are installed on the path of the laser beam that this LASER Light Source produces, in order to the laser beam that this LASER Light Source produced is become a collimated light beam; Optical diffusion sheet is installed on the path of the collimated light beam that these lens project, and is used for the light from lens is produced scattering, allows being evenly distributed of light; Vib. is used to support optical diffusion sheet and makes it up-down vibration.
For achieving the above object, the method for minimizing speckle provided by the present invention comprises the steps:
At first, the laser beam that LASER Light Source is produced is projected on the lens;
Secondly, through lens laser beam is become a collimated laser beam;
Moreover, collimated laser beam is projected on the optical diffusion sheet, through optical diffusion sheet with being evenly distributed of light;
At last, make Vib. drive the optical diffusion sheet vibration, to reduce speckle.
As mentioned above, the present invention reduces the light supply apparatus of speckle and the method for minimizing speckle will produce scattering from the light of lens by optical diffusion sheet, allow being evenly distributed of light, the vibration frequency of adjusting Vib. again makes optical diffusion sheet along with the Vib. up-down vibration, to reach the effect that reduces hot spot.
Description of drawings
Fig. 1 is for being the light supply apparatus figure of the minimizing speckle of the present invention's one specific embodiment.
Fig. 2 is the process flow diagram of the method for the minimizing speckle of the present invention's one specific embodiment.
The description of reference numerals of each element is as follows among the figure:
Reduce light supply apparatus 100 LASER Light Source 11 of speckle
Vib. 14
Embodiment
For describing technology contents of the present invention and purpose of being reached and effect in detail, give explanation below in conjunction with embodiment is detailed.
See also Fig. 1, the light supply apparatus 100 that the present invention reduces speckle comprises a LASER Light Source 11, lens 12, an optical diffusion sheet 13 and a Vib. 14.
Please continue to consult Fig. 1, LASER Light Source 11 is in order to produce a laser beam; Lens 12 are installed on the path of the laser beam that this LASER Light Source 11 produced, and become a collimated light beam in order to the laser beam that this LASER Light Source 11 is produced; Optical diffusion sheet 13 is installed on the path of the collimated light beam that these lens 12 are projected, and is used for the light from lens 12 is produced scattering, allows being evenly distributed of light; Vib. 14 is installed in optical diffusion sheet 13 belows, is used to support optical diffusion sheet 13 and makes it up-down vibration.
See also Fig. 2, the present invention reduces the method for speckle, comprises the steps:
At first, the laser beam that LASER Light Source 11 is produced is projected on the lens 12;
Secondly, through lens 12 laser beam is become a collimated laser beam;
Moreover, collimated laser beam is projected on the optical diffusion sheet 13, through optical diffusion sheet 13 with being evenly distributed of light;
At last, the vibration frequency of adjusting Vib. 14 makes optical diffusion sheet 13 up-down vibration thereupon, to reach the effect that reduces speckle.
As mentioned above, the present invention will produce scattering from the light of lens 12 by optical diffusion sheet 13, allow being evenly distributed of light, the vibration frequency of adjusting Vib. 14 again makes optical diffusion sheet 13 along with Vib. 14 is being done up-down vibration in certain vibration amplitude, to reach the effect that reduces hot spot.
Claims (4)
1. a light supply apparatus that reduces speckle comprises at least one LASER Light Source, in order to produce a light beam; It is characterized in that: the light supply apparatus of this minimizing speckle also comprises lens, an optical diffusion sheet and a Vib., and lens are installed on the path of the laser beam that this LASER Light Source produces, in order to the laser beam that this LASER Light Source produced is become a collimated light beam; Optical diffusion sheet is installed on the path of the collimated light beam that these lens project, and is used for the light from lens is produced scattering, allows being evenly distributed of light; Vib. is used to support optical diffusion sheet and makes it up-down vibration.
2. the light supply apparatus of minimizing speckle as claimed in claim 1 is characterized in that: described Vib. firmly is installed in the optical diffusion sheet below.
3. a method that reduces speckle comprises the steps:
At first, the laser beam that LASER Light Source is produced is projected on the lens;
Secondly, through lens light beam is become a collimated light beam;
Moreover, collimated light beam is projected on the optical diffusion sheet, through optical diffusion sheet with being evenly distributed of light;
At last, make Vib. drive the optical diffusion sheet vibration, to reduce speckle.
4. the method for minimizing speckle as claimed in claim 3 is characterized in that: described Vib. is with a frequency up-down vibration greater than 30Hz, and its Oscillation Amplitude is less than 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101002082A CN102129130A (en) | 2010-01-15 | 2010-01-15 | Light source device and method for reducing speckles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101002082A CN102129130A (en) | 2010-01-15 | 2010-01-15 | Light source device and method for reducing speckles |
Publications (1)
| Publication Number | Publication Date |
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| CN102129130A true CN102129130A (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101002082A Pending CN102129130A (en) | 2010-01-15 | 2010-01-15 | Light source device and method for reducing speckles |
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| CN (1) | CN102129130A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298215A (en) * | 2011-09-15 | 2011-12-28 | 深圳市佶达德科技有限公司 | Homogenizing method for laser illumination and laser illumination device |
| CN102495512A (en) * | 2011-12-17 | 2012-06-13 | 深圳市佶达德科技有限公司 | Laser illuminator capable of continuously regulating illumination angle in large scale and regulating method thereof |
| CN102740113A (en) * | 2012-07-06 | 2012-10-17 | 科瑞自动化技术（苏州）有限公司 | Sensitization measurement device of miniature camera |
| CN104614354A (en) * | 2015-01-29 | 2015-05-13 | 北京海维尔科技发展有限公司 | Fluorescence imaging device and method |
| CN105807546A (en) * | 2015-01-21 | 2016-07-27 | 罗伯特·博世有限公司 | Projection screen apparatus, projection apparatus, and projection method |
| CN106125314A (en) * | 2016-07-01 | 2016-11-16 | 海信集团有限公司 | A kind of light source and laser projection device |
| US9979939B2 (en) | 2016-06-30 | 2018-05-22 | Hisense Co., Ltd. | Light source assembly and laser projector |
| CN109270704A (en) * | 2018-11-21 | 2019-01-25 | 四川长虹电器股份有限公司 | A kind of dynamic light-source system for being used for laser dissipation spot |
-
2010
- 2010-01-15 CN CN2010101002082A patent/CN102129130A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298215A (en) * | 2011-09-15 | 2011-12-28 | 深圳市佶达德科技有限公司 | Homogenizing method for laser illumination and laser illumination device |
| WO2013037161A1 (en) * | 2011-09-15 | 2013-03-21 | 深圳市佶达德科技有限公司 | Homogenization method for laser lighting supplementation and laser illumination device thereof |
| CN102298215B (en) * | 2011-09-15 | 2013-06-12 | 深圳市佶达德科技有限公司 | Homogenizing method for laser illumination and laser illumination device |
| CN102495512A (en) * | 2011-12-17 | 2012-06-13 | 深圳市佶达德科技有限公司 | Laser illuminator capable of continuously regulating illumination angle in large scale and regulating method thereof |
| CN102740113A (en) * | 2012-07-06 | 2012-10-17 | 科瑞自动化技术（苏州）有限公司 | Sensitization measurement device of miniature camera |
| CN105807546A (en) * | 2015-01-21 | 2016-07-27 | 罗伯特·博世有限公司 | Projection screen apparatus, projection apparatus, and projection method |
| CN104614354A (en) * | 2015-01-29 | 2015-05-13 | 北京海维尔科技发展有限公司 | Fluorescence imaging device and method |
| US9979939B2 (en) | 2016-06-30 | 2018-05-22 | Hisense Co., Ltd. | Light source assembly and laser projector |
| CN106125314A (en) * | 2016-07-01 | 2016-11-16 | 海信集团有限公司 | A kind of light source and laser projection device |
| CN109270704A (en) * | 2018-11-21 | 2019-01-25 | 四川长虹电器股份有限公司 | A kind of dynamic light-source system for being used for laser dissipation spot |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110720 |