CN103869475B - Shimming and speckle restraining device - Google Patents
Shimming and speckle restraining device Download PDFInfo
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- CN103869475B CN103869475B CN201410132826.3A CN201410132826A CN103869475B CN 103869475 B CN103869475 B CN 103869475B CN 201410132826 A CN201410132826 A CN 201410132826A CN 103869475 B CN103869475 B CN 103869475B
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- 230000000452 restraining effect Effects 0.000 title claims abstract description 11
- 238000009792 diffusion process Methods 0.000 claims abstract description 44
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims abstract description 34
- 230000003287 optical effect Effects 0.000 claims abstract description 34
- 238000005286 illumination Methods 0.000 abstract description 4
- 230000001427 coherent effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000013307 optical fiber Substances 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
The invention provides a kind of laser beam shimming and speckle restraining device.This device includes the discoid diffusion sheet of truncated cone-shaped optical wand, motor, wedge shape and prismatic table shape light siphunculus.The present invention utilizes truncated cone-shaped optical wand to accept incident beam, incident beam is in optical wand after multiple reflections, at exit end with a ring-shaped light spot outgoing, outgoing beam is after motor-driven diffusion sheet scatters, after scattering, ring-incidence light incides prismatic table shape light siphunculus incidence end, after light siphunculus content multiple reflections, it is shaped as rectangle, in through tube exit end outgoing.The advantages such as this apparatus structure is simple, and stable, speckle eradicating efficacy is good, and light field is uniform, can be applicable to the illumination with coherent light as light source or Display Technique field.
Description
Technical field
The present invention relates to technical field of laser display, be especially applicable to laser lighting, laser explosure and the optical instrument with coherent light as light source, be specially a kind of shimming and speckle restraining device.
Background technology
Laser has that brightness is high, wavelength bandwidth is little, the features such as etendue amount is little, has broad application prospects in laser display field and field of laser illumination.But, due to laser emitting is single mode or multimode Gaussian beam, and optical field distribution is uneven, it is therefore desirable to laser beam is converted into given shape (such as rectangle or square) and the light beam of even intensity；Owing to laser is coherent light, after rough surface (such as screen) reflects, human eye is it is seen that have the image of speckle, speckle phenomena seriously reduces image displaying quality, it is thus desirable to eliminate laser speckle phenomenon, improve picture quality, the shimming of laser beam and speckle elimination and become two hang-ups in laser display and field of laser illumination.
Summary of the invention
It is an object of the invention to provide a kind of device that can play shimming and speckle suppression in laser display and laser lighting.
The present invention adopts the following technical scheme that realization:
A kind of shimming and speckle restraining device, diffusion sheet and prismatic table shape (i.e. frusta-pyramidal) light siphunculus including light-permeable, described diffusion sheet is the discoid diffusion sheet of wedge shape, and the discoid diffusion sheet of described wedge shape is driven rotation axis and the motor output shaft dead in line of rotation and the discoid diffusion sheet of wedge shape by motor；The left side of the discoid diffusion sheet of described wedge shape is provided with truncated cone-shaped (i.e. conical butt) optical wand, is provided with prismatic table shape light siphunculus on the right side of it, the large end face of described truncated cone-shaped optical fiber be light entrance face, its small end face diffusion sheet discoid with wedge shape left surface adjacent, the large end face of described prismatic table shape light siphunculus be light-emitting face, its small end face diffusion sheet discoid with wedge shape right flank adjacent；Described truncated cone-shaped optical fiber and prismatic table shape light siphunculus are positioned in same light path and the small end face diameter of described truncated cone-shaped optical wand is less than the minor face of small end face of prismatic table shape light siphunculus.
During work, the large end face of truncated cone-shaped optical wand receives multiple multi-angle laser incident beams, as in figure 2 it is shown, the first incident beam 401 becomes θ with the axis 601 of truncated cone-shaped optical wand 1011Angle is incident, in truncated cone-shaped optical fiber 101 after these reflections many, with the outgoing of first annular hot spot 501；Second incident beam 402 becomes θ with the axis 601 of truncated cone-shaped optical wand 1012Angle is incident, in truncated cone-shaped optical wand 101 after these reflections many, with the second ring-shaped light spot 502 outgoing；3rd incident beam 403 becomes θ with the axis 601 of truncated cone-shaped optical wand 1013Angle is incident, in truncated cone-shaped optical wand 101 after these reflections many, with the 3rd ring-shaped light spot 503 outgoing；Owing to different angles incident beam incides truncated cone-shaped optical wand 101, light beam in truncated cone-shaped optical wand 101 after multiple reflections, with the ring-shaped light spot of different-diameter in fiber exit end (small end face) outgoing, after wedge shape discoid diffusion sheet 202 transmission, incide in prismatic table shape light siphunculus 301, in prismatic table shape light siphunculus 301 after multiple reflections shaping, with rectangular light spot outgoing.nullDue to a light spot shape incident beam after truncated cone-shaped optical wand 101，Can be with ring-shaped light spot outgoing，So can cover more incoherent region on the discoid diffusion sheet of wedge shape 202，And due to the discoid diffusion sheet of wedge motor drive under high speed rotating (such as rotating speed is at more than 1800r/min) time，Left surface 211 or the right flank 212 of diffusion sheet rotate the angle of inclination that axis 213 becomes certain，When the incident beam discoid diffusion sheet 202 of transmission wedge，High speed rotating due to the discoid diffusion sheet of wedge 202，Outgoing beam is caused to scan in the range of certain angle，When outgoing beam carries out the scanning of certain angle in time，Add the angular diversity of outgoing beam，Can effectively suppress speckle，The light beam being made simultaneously incident to prismatic table shape light siphunculus is equivalent to surface source luminescence，It is more beneficial for the shimming of light siphunculus.
Incident beam is through the reflection of prismatic table shape light siphunculus 301 inner surface, incident beam often reflects once, outgoing beam shooting angle reduces by the taper angle of 2 times, length hence with prismatic table shape light siphunculus can adjust the shooting angle of irradiating light beam, or can also adjust the shooting angle of irradiating light beam by adjusting the scattering angle of the discoid diffusion sheet of wedge shape.Preferably, the scattering angle of the discoid diffusion sheet of described wedge shape and prismatic table shape light siphunculus 301 length ensure that each laser light incident light beam is just covered light-emitting face by the hot spot of the large end face outgoing of prismatic table shape light siphunculus after light entrance face enters, so on light siphunculus exit facet, any point all has n bundle arbitrary source equal strength to irradiate, according to " the Speckle Phenomena in of Goodman
Optics, theory and applications. " n can be realized1/2Speckle contrast reduce.
Preferably, the large end face of truncated cone-shaped optical fiber receives incident beam, owing to large end face aperture is big, and can plate anti-reflection film, and therefore light beam coupling efficiency is high.
Multiple angle incident beams converge with truncated cone-shaped optical wand incidence end surface after or front, the high power density scaling loss to the plane of incidence can be avoided.
Have the beneficial effect that:
1, shimming is effective: with a light spot shape incident beam after truncated cone-shaped optical wand, and with ring-shaped light spot outgoing, the light beam inciding prismatic table shape light siphunculus is equivalent to surface source luminescence, is more beneficial for the shimming of light siphunculus.
2, speckle eradicating efficacy is good: utilize truncated cone-shaped optical wand that point-like incident beam is changed into ring-shaped light spot outgoing, covers bigger incoherent region on diffusion sheet；The high speed rotating of the discoid diffusion sheet of wedge, it is achieved the angle scanning of outgoing beam, the diffusion sheet of high speed rotating realizes the phase-modulation of light beam simultaneously；Each incident beam all can cover light siphunculus exit facet after this device, it is achieved the superposition of multiple arbitrary sources, therefore can effectively eliminate speckle.
3, laser utilization is high: truncated cone-shaped optical wand large end face can receive multiple incident beam, and receptor area is big, and all surface is shown in all can plate anti-reflection film, and therefore light beam coupling efficiency is high.
4, simple in construction, cost is low, it is easy to processes and installs.
5, in device, each ingredient all can realize for a long time, and continuous-stable works, and stable performance is safe and reliable.
The present invention is reasonable in design, simple in construction, truncated cone-shaped optical wand large end face is utilized to receive multiple angle incident beams, the incident beam of multiple angles is after optical fiber multiple reflections, after forming the ring-shaped light spot outgoing of different-diameter, the discoid diffusion sheet transmission of rotated wedge shape and scattering, incident prismatic table shape light siphunculus, after multiple reflections, in light siphunculus exit end superposition, form uniform light spots, thus reach shimming and speckle suppression purpose.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is incident illumination schematic diagram with ring-shaped light spot outgoing after truncated cone-shaped optical fiber.
Fig. 3 is the side view of the discoid diffusion sheet of wedge shape.
In figure, 101-truncated cone-shaped optical wand, 201-motor, the discoid diffusion sheet of 202-wedge shape, 301-prismatic table shape light siphunculus, 401-the first incident beam, 402-the second incident beam, 403-the 3rd incident beam, the first annular hot spot of 501-, 502-the second ring-shaped light spot, 503-the 3rd ring-shaped light spot, the axis of 601-truncated cone-shaped optical fiber, 211-left surface, 212-right flank, 213-rotation axis.
Detailed description of the invention
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in detail.
A kind of shimming and speckle restraining device, diffusion sheet and prismatic table shape light siphunculus 301 including light-permeable, as shown in Figure 1, described diffusion sheet is the discoid diffusion sheet of wedge shape 202, and the discoid diffusion sheet of described wedge shape 202 is driven rotation axis and the motor 201 output shaft dead in line of rotation and the discoid diffusion sheet of wedge shape 202 by motor 201；The left side of the discoid diffusion sheet of described wedge shape 202 is provided with truncated cone-shaped optical wand 101, is provided with prismatic table shape light siphunculus 301 on the right side of it, the large end face of described truncated cone-shaped optical wand 101 be light entrance face, its small end face diffusion sheet discoid with wedge shape 202 left surface 211 adjacent, the large end face of described prismatic table shape light siphunculus 301 be light-emitting face, its small end face diffusion sheet discoid with wedge shape 202 right flank 212 adjacent；Described truncated cone-shaped optical wand 101 and prismatic table shape light siphunculus 301 are positioned in same light path and the small end face diameter of described truncated cone-shaped optical wand 101 is less than the minor face of small end face of prismatic table shape light siphunculus 301, make all of light all enter in prismatic table shape light siphunculus as far as possible.
The scattering angle of the discoid diffusion sheet of described wedge shape 202 and prismatic table shape light siphunculus 301 length ensure that each laser light incident light beam is just covered light-emitting face by the hot spot of the large end face outgoing of prismatic table shape light siphunculus after light entrance face enters, and so can preferably reduce speckle contrast.
When being embodied as, it is 90 degree that the left surface 211 of the discoid diffusion sheet of described wedge shape 202 rotates the angle of axis 213, it is 88 degree that the right flank 212 of the discoid diffusion sheet of wedge shape 202 rotates the angle of axis 213 so that all of light all enters in prismatic table shape light siphunculus.
The large end face of described truncated cone-shaped optical wand 101 is coated with anti-reflection film, improves coupling efficiency.
Described prismatic table shape light siphunculus 301 is truncated rectangular pyramids shape light siphunculus, such light siphunculus outgoing rectangular light spot, meets common display or lighting demand.
The rotating speed of described motor 201 is at more than 1800r/min so that eliminate speckle within the time of integration (30Hz) of human eye.
The large end face of described truncated cone-shaped optical wand 101 receives the incident beam of multiple angles, improves illuminance further and eliminates speckle.
Claims (5)
1. a shimming and speckle restraining device, diffusion sheet and prismatic table shape light siphunculus (301) including light-permeable, it is characterized in that: described diffusion sheet is the discoid diffusion sheet of wedge shape (202), the discoid diffusion sheet of described wedge shape (202) is driven rotation axis and motor (201) the output shaft dead in line of rotation and the discoid diffusion sheet of wedge shape (202) by motor (201)；The rotating speed of described motor (201) is at more than 1800r/min；The left side of the discoid diffusion sheet of described wedge shape (202) is provided with truncated cone-shaped optical wand (101), is provided with prismatic table shape light siphunculus (301) on the right side of it, the large end face of described truncated cone-shaped optical wand (101) be light entrance face, its small end face diffusion sheet discoid with wedge shape (202) left surface (211) adjacent, the large end face of described prismatic table shape light siphunculus (301) be light-emitting face, its small end face diffusion sheet discoid with wedge shape (202) right flank (212) adjacent；Described truncated cone-shaped optical wand (101) and prismatic table shape light siphunculus (301) are positioned in same light path and the small end face diameter of described truncated cone-shaped optical wand (101) is less than the minor face of small end face of prismatic table shape light siphunculus (301).
Shimming the most according to claim 1 and speckle restraining device, it is characterised in that: the scattering angle of the discoid diffusion sheet of described wedge shape (202) and prismatic table shape light siphunculus (301) length ensure that each laser light incident light beam is just covered light-emitting face by the hot spot of the large end face outgoing of prismatic table shape light siphunculus after light entrance face enters.
Shimming the most according to claim 1 and speckle restraining device, it is characterised in that: the large end face of described truncated cone-shaped optical wand (101) is coated with anti-reflection film.
Shimming the most according to claim 3 and speckle restraining device, it is characterised in that: described prismatic table shape light siphunculus (301) is truncated rectangular pyramids shape light siphunculus.
Shimming the most according to claim 1 and speckle restraining device, it is characterised in that: the large end face of described truncated cone-shaped optical wand (101) receives the incident beam of multiple angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410132826.3A CN103869475B (en) | 2014-04-03 | 2014-04-03 | Shimming and speckle restraining device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410132826.3A CN103869475B (en) | 2014-04-03 | 2014-04-03 | Shimming and speckle restraining device |
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| Publication Number | Publication Date |
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| CN103869475A CN103869475A (en) | 2014-06-18 |
| CN103869475B true CN103869475B (en) | 2016-11-23 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123419A (en) * | 2013-01-28 | 2013-05-29 | 山西傲维光视光电科技有限公司 | Shimming decoherence device based on rotation reflecting surface and scatterer |
| CN103323958A (en) * | 2013-06-22 | 2013-09-25 | 夏云 | Speckle eliminating device based on cross polarization composition |
| CN203773166U (en) * | 2014-04-03 | 2014-08-13 | 夏云 | Shimming and speckle suppressing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004354671A (en) * | 2003-05-29 | 2004-12-16 | Nikon Corp | Speckle pattern dispersing device and laser light irradiation apparatus |
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2014
- 2014-04-03 CN CN201410132826.3A patent/CN103869475B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123419A (en) * | 2013-01-28 | 2013-05-29 | 山西傲维光视光电科技有限公司 | Shimming decoherence device based on rotation reflecting surface and scatterer |
| CN103323958A (en) * | 2013-06-22 | 2013-09-25 | 夏云 | Speckle eliminating device based on cross polarization composition |
| CN203773166U (en) * | 2014-04-03 | 2014-08-13 | 夏云 | Shimming and speckle suppressing device |
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| CN103869475A (en) | 2014-06-18 |
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Owner name: SHANXI AOWEI GUANGSHI PHOTOELECTRIC TECHNOLOGY CO. Free format text: FORMER OWNER: XIA YUN Effective date: 20140912 |
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Effective date of registration: 20140912 Address after: 401, room 226, 030006 Changzhi Road, Taiyuan hi tech Zone, Shanxi, China Applicant after: Shanxi Aowei Guangshi Photoelectric Technology Co., Ltd. Address before: 030006 No. 226, Changzhi Road, Taiyuan, Shanxi Applicant before: Xia Yun |
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Effective date of registration: 20171218 Address after: No. 51, workshop No. 3, Zhengyang street, Taiyuan economic and Technological Development Zone, Shanxi Province Patentee after: JINMEI LASERTEC CORP., LTD. Address before: 401, room 226, 030006 Changzhi Road, Taiyuan hi tech Zone, Shanxi, China Patentee before: Shanxi Aowei Guangshi Photoelectric Technology Co., Ltd. |
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Address after: 030032 No. 51 Zhengyang Street, Xiaodian District, Taiyuan City, Shanxi Province Patentee after: Shanxi Hanwei laser Polytron Technologies Inc Address before: 030032 No. 51 Zhengyang Street, Taiyuan Economic and Technological Development Zone, Shanxi Province Patentee before: JINMEI LASERTEC CORP., LTD. |