CN218848559U - Laser speckle suppression optical system of double fly-eye lenses - Google Patents
Laser speckle suppression optical system of double fly-eye lenses Download PDFInfo
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- CN218848559U CN218848559U CN202223050549.0U CN202223050549U CN218848559U CN 218848559 U CN218848559 U CN 218848559U CN 202223050549 U CN202223050549 U CN 202223050549U CN 218848559 U CN218848559 U CN 218848559U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model relates to a technical field of projector discloses a laser speckle suppression optical system of two fly-eye lenses, include: the laser light source module, the spot dissipation optical component, the first fly-eye lens, the optical light source lens group, the second fly-eye lens, the illumination optical lens group and the display chip module are sequentially arranged; the utility model discloses in used one section dissipation spot optical components and parts and the kohler illumination light path of four sections, carried out the suppression of quintic spatial coherence to laser beam, good speckle suppression effect has, and owing to adopted the kohler illumination light path of four sections, especially used two sections fly eye lens, whole optical path system's length and size have obtained effective compression, promoted laser lighting's homogeneity, solved among the prior art laser projector because need solve the laser correlation, lead to laser projector's length and the too big problem of volume.
Description
Technical Field
The utility model belongs to the technical field of the technique of projector and specifically relates to a laser speckle suppression optical system of two fly's eye lenses.
Background
The projection display technology is a technology developed for decades, the projection display technology needs a light source, the light source is developed from an initial tungsten filament lamp source, a high-pressure mercury lamp source and an LED lamp source, and the projection display technology is developed to a laser lamp source so far, and compared with a projector using a tungsten filament lamp, a high-pressure mercury lamp and an LED lamp as light sources, the projection display technology has the advantages of high brightness, bright color, high picture quality, very high energy efficiency grade and obvious advantages.
However, projectors using laser as the light source also have two relatively large problems: firstly, the laser naturally has very high coherence, which causes the picture output to the screen to have obvious speckle phenomenon; secondly, the laser light sources are usually arranged in a plurality of laser arrays, which results in discontinuous and non-uniform light intensity distribution curves, so that the display picture is easy to have the phenomenon of non-uniform light intensity distribution or non-uniform color distribution.
In the prior art, in order to solve the problem of the laser projector, there are several solutions:
the scheme directly converts the laser beam with strong coherence into an incoherent light source through secondary excitation of the fluorescent powder, so that the problem of speckle caused by coherence is solved. However, the disadvantages of this solution are as follows: firstly, the structure for attaching the fluorescent powder is relatively complex, and the problems of volume, heat dissipation and the like need to be considered at the same time; secondly, the ratio of the light frequency spectrum band excited by the fluorescent powder is wider, the color purity of the picture output to the screen is reduced, and the coverage range of the color gamut is obviously reduced; and thirdly, the optical expansion of the light beam excited by the fluorescent powder is greatly increased, which is not beneficial to the shaping of a subsequent light path and the control of stray light.
Light bars (also known as integrating bars) are used to handle light homogenization and speckle. The main disadvantage of this solution is that the optical rod needs a certain optical length to achieve better effects of homogenizing and eliminating speckles, which results in a longer length of the whole optical system and a larger volume of the whole optical system, and is light, small and unfriendly for the market.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a laser speckle suppression optical system of two fly's eye lens aims at solving among the prior art laser projector because need solve the laser correlation, leads to laser projector's length and the too big problem of volume.
The utility model discloses a realize like this, the utility model provides a laser speckle suppression optical system of two fly-eye lenses, include:
the laser light source module, the spot dissipation optical component, the first fly-eye lens, the optical light source lens group, the second fly-eye lens, the illumination optical lens group and the display chip module are sequentially arranged;
the laser light source module is used for emitting laser beams of approximately parallel light;
the speckle eliminating optical component is used for diffusing the laser beam so as to inhibit the spatial coherence of the first laser on the laser beam;
the first fly-eye lens is used for performing first Koehler illumination optimization on the laser beam so as to suppress the coherence of the laser beam for the second time;
the optical light source lens group is used for performing secondary Coriolis illumination optimization on the laser beams so as to suppress the coherence of the laser beams for the third time;
the second fly-eye lens is used for performing third-time Kohler illumination optimization on the laser beams so as to suppress the coherence of the laser beams for the fourth time;
the illumination optical lens group is used for carrying out fourth kohler illumination optimization on the laser beams so as to inhibit the coherence of the laser beams for the fifth time;
the display chip module is used for receiving the laser beam.
In one embodiment, the speckle reduction optical component is a diffusion sheet, ground glass or an array lens.
In one embodiment, the optical light source lens group is a lens group whose optical path principle adopts kohler illumination principle.
In one embodiment, the illumination optical lens assembly is a lens assembly adopting kohler illumination principle as an optical path principle.
In one embodiment, the display chip module is a DLP display chip, an LCOS Liquid Crystal On Silicon (LCOS) or an LCD liquid crystal screen.
In one embodiment, the device further comprises a moving mechanical structure;
the movement mechanical structure is used for fixing the spot dissipation optical component and driving the spot dissipation optical component to reciprocate between the laser light source module and the first fly-eye lens.
In one embodiment, the moving mechanical structure comprises a driving motor, a moving track, a moving trolley and a fixed clamping groove;
the motion track is arranged between the laser light source module and the first fly-eye lens;
the moving trolley is arranged on the moving track, and the fixed clamping groove is arranged on the moving trolley and used for fixing the speckle-dissipating optical component;
the driving motor is electrically connected with the moving trolley so as to drive the moving trolley to reciprocate on the moving track.
The utility model provides a laser speckle suppression optical system of two fly-eye lenses has following beneficial effect:
1. the utility model discloses in used one section dissipation spot optical components and parts and the kohler illumination light path of four sections, carried out the suppression of quintic spatial coherence to laser beam, good speckle suppression effect has, and owing to adopted the kohler illumination light path of four sections, especially used two sections fly eye lens, whole optical path system's length and size have obtained effective compression, promoted laser lighting's homogeneity, solved among the prior art laser projector because need solve the laser correlation, lead to laser projector's length and the too big problem of volume.
2. The utility model discloses well four sections of adoption are ke li illumination light path, have especially used two sections compound eye lens, have very obvious forward effect to illumination intensity homogeneity and the colour homogeneity that promotes the projection picture.
3. The utility model discloses in increased motion mechanical structure, the dissipation spot optical components and parts that move up can further improve laser beam's spatial coherence, improve the speckle effect of projection picture.
Drawings
Fig. 1 is a schematic diagram of an optical path structure of a laser speckle suppression optical system of a double fly-eye lens provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of a kinematic mechanical structure of a laser speckle suppression optical system of a double fly-eye lens according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a fly-eye lens of a laser speckle suppression optical system of a double fly-eye lens according to an embodiment of the present invention.
Reference numerals: the system comprises a laser light source module 1, a speckle-dissipating optical component 2, a first fly eye lens 3, an optical light source lens group 4, a second fly eye lens 5, a lighting optical lens group 6, a display chip module 7, a motion mechanical structure 8, a driving motor 81, a motion track 82, a motion trolley 83 and a fixed clamping groove 84.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
Referring to fig. 1, a preferred embodiment of the present invention is provided.
The utility model provides a laser speckle suppression optical system of two fly-eye lenses, include:
the laser light source module 1, the spot-dissipating optical component 2, the first fly eye lens 3, the optical light source lens group 4, the second fly eye lens 5, the lighting optical lens group 6 and the display chip module 7 are sequentially arranged.
Specifically, laser light source module 1 is used for sending the laser beam who is close the parallel light, and what need explain is, the utility model discloses do not make the restriction to the model that laser light source module 1 used, also can form laser light source module 1 through assembling of a plurality of single lasers.
More specifically, when the laser beam emitted by the laser light source module 1 reaches the speckle reduction optical component 2, the laser beam appears as a plurality of point-like spots, and the first speckle reduction optical component 2 is used for diffusing the laser beam so as to suppress the spatial coherence of the laser beam for the first time.
The spatial coherence of the laser refers to that when light is reflected from a rough surface or is backscattered or transmitted from the interior of a medium containing scattering substances, irregular intensity distribution is formed, and randomly distributed spots appear; more specifically, this is due to the interference phenomena that occur when reflected or scattered light fluctuations meet in space, i.e. light propagates through the scattering medium and free space, creating speckle.
It can be understood that, by diffusing the laser beam, the speckle reduction optical component 2 reduces the light in the unit space and the interference between the lights after the laser beam is diffused, thereby achieving the suppression of the spatial coherence of the laser.
More specifically, the first fly-eye lens 3 is used to perform first kohler illumination optimization on the laser beam to perform second suppression of the spatial coherence of the laser light on the laser beam.
Kohler illumination is a secondary imaging method that provides uniform, sufficiently bright illumination of the sample without producing glare.
The fly-eye lens is a lens formed by combining a series of small lenses, and the fly-eye lens array is applied to an illumination system to obtain high light energy utilization rate and large-area uniform illumination; the utility model discloses in, first fly eye lens 3's effect is to carry out the space convolution with laser beam, breaks up laser beam's energy distribution from the face distribution for the angle distribution to realize the illumination optimization of kohler, with the suppression that carries out the spatial coherence of secondary laser to laser beam.
More specifically, as shown in fig. 3, the working principle of the fly-eye lens is that the focal point of the S1 surface of each single eye falls on the S2 surface, so that the light on each point on the S1 surface can be filled on the S2 surface, that is, the light beam on the S2 surface is the superposition of the light on each point on the S1 surface, which is equivalent to performing kohler illumination optimization on the light beam passing through the fly-eye lens 5, and performing an operation of suppressing laser spatial coherence on the laser beam through the kohler illumination optimization, thereby further improving the uniformity of the illumination beam, reducing the spatial coherence intensity of the laser beam, and achieving the effect of optimizing speckles.
More specifically, the optical light source lens group 4 is used to perform the second kohler illumination optimization on the laser light beam to perform the suppression of the coherence of the laser light for the third time on the laser light beam.
It should be noted that the optical light source lens assembly 4 of the present invention is a lens assembly using kohler illumination principle, and therefore can optimize kohler illumination for laser beam.
It can be understood that the utility model discloses do not make the restriction to quantity, shape, size, material, distance isoparametric of lens in optical light source lens group 4, only need optical path principle of optical light source lens group 4 adopt kohler's illumination principle can.
More specifically, the second fly-eye lens 5 is used to perform a third kohler illumination optimization on the laser light beam to perform a fourth suppression of the coherence of the laser light on the laser light beam.
It should be noted that the second fly-eye lens 5 is used for performing spatial convolution on the laser beam to scatter the energy distribution of the laser beam from the surface distribution to the angular distribution, so as to achieve kohler illumination optimization, and suppress the spatial coherence of the laser beam for the fourth time.
More specifically, the illumination optical lens group 6 is used to perform a fourth re-kohler illumination optimization on the laser light beam to perform a fifth suppression of the coherence of the laser light on the laser light beam.
It can be understood that illumination optics lens group 6 is unanimous with optical light source lens group 4, and its light path principle adopts kohler's illumination principle, consequently can carry out the suppression of spatial coherence to laser beam, and, the utility model discloses do not make the restriction to quantity, shape, size, material, distance isoparametric of lens in illumination optics lens group 6, only need illumination optics lens group 6's light path principle adopt kohler's illumination principle can.
More specifically, the illumination optics group 6 needs to shape the laser beam and adjust the laser beam to a size and an input angle suitable for the display chip module 7 to receive and display the laser beam by the display chip module 7.
The utility model provides a laser speckle suppression optical system of two fly-eye lenses has following beneficial effect:
1. the utility model discloses in used one section dissipation spot optical components and parts 2 and four sections ke le illumination light path, five times space coherence's suppression has been carried out to laser beam, good speckle suppression effect has, and owing to adopted the four sections ke le illumination light path, especially used two sections compound eye lenses, whole optical path system's length and size have obtained effective compression, the homogeneity of laser lighting has been promoted, laser projector among the prior art has been solved owing to need solve the laser correlation, the length that leads to laser projector and the too big problem of volume.
2. The utility model discloses well adoption four sections are mutually reined in illumination light path, have especially used two sections fly eye lens, have very obvious forward effect to illumination homogeneity and the colour homogeneity that promotes the projection picture.
3. The utility model discloses in increased motion mechanical structure 8, the dissipation spot optical components and parts 2 that move up can further improve laser beam's spatial coherence, improve the speckle effect of projection picture.
In some embodiments, the speckle-dissipating optical component 2 is a diffuser, ground glass, or an array lens.
Specifically, the speckle reduction optical component 2 functions to diffuse the laser beam, and therefore the speckle reduction optical component 2 needs to have a function of diffusing the laser beam.
More specifically, both the diffusion sheet and the frosted glass have the effect of diffusing the light beam.
It should be noted that, the array lens is the lens group that the array set up, in order to satisfy the diffusion effect to laser beam, the utility model discloses the monocular size of the array lens that uses needs the size of the punctiform facula of less than or equal to laser beam.
In some embodiments, the display chip module 7 is a DLP display chip, LCOS liquid crystal on silicon, or LCD liquid crystal panel.
It should be noted that the present invention is not limited to a certain display chip, and the chips other than the above-mentioned three kinds of chips are also applicable to the present invention.
In some embodiments, a moving mechanical structure 8 is also included.
Specifically, the moving mechanical structure 8 is used for fixing the speckle reduction optical component 2 and driving the speckle reduction optical component 2 to reciprocate between the laser light source module 1 and the first fly-eye lens 3.
It should be noted that, when the speckle-eliminating optical component 2 reciprocates between the laser light source module 1 and the first fly-eye lens 3, the speckle-eliminating optical component can more effectively scatter the laser beam, so as to further weaken the dot matrix effect, reduce the spatial coherence of the laser, and improve the speckle eliminating phenomenon of the projection image.
Referring to fig. 2, in some embodiments, the moving mechanism 8 includes a driving motor 81, a moving rail 82, a moving cart 83, and a fixed slot 84.
Specifically, the movement track 82 is provided between the laser light source module 1 and the first fly-eye lens 3; the moving trolley 83 is arranged on the moving track 82, and the fixed clamping groove 84 is arranged on the moving trolley 83 and used for fixing the speckle-dissipating optical component 2; the driving motor 81 is electrically connected to the moving cart 83 to drive the cart to reciprocate on the moving rail 82.
It should be noted that the utility model discloses do not make the restriction to the concrete structure of moving mechanical structure 8, except the structure that the aforesaid provided, other structures that can realize driving 2 back and forth movements of speckle reduction optical components and parts can regard as moving mechanical structure 8 equally, if the utility model discloses another utility model patent that applicant's application number is 202220755481.7 "a can realize the telecontrol equipment of simple harmonic vibration", can regard as the utility model provides a moving mechanical structure 8.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A laser speckle reduction optical system of a double fly-eye lens, comprising:
the laser light source module, the spot dissipation optical component, the first fly-eye lens, the optical light source lens group, the second fly-eye lens, the illumination optical lens group and the display chip module are sequentially arranged;
the laser light source module is used for emitting laser beams of approximately parallel light;
the speckle eliminating optical component is used for diffusing the laser beam so as to inhibit the spatial coherence of the laser beam for the first time;
the first fly-eye lens is used for performing first Kohler illumination optimization on the laser beam so as to suppress the coherence of the laser beam for the second time;
the optical light source lens group is used for performing secondary Coriolis illumination optimization on the laser beams so as to suppress the coherence of the laser beams for the third time;
the second fly-eye lens is used for performing third-time Kohler illumination optimization on the laser beams so as to suppress the coherence of the laser beams for the fourth time;
the illumination optical lens group is used for carrying out fourth kohler illumination optimization on the laser beams so as to inhibit the coherence of the laser beams for the fifth time;
the display chip module is used for receiving the laser beam.
2. The laser speckle suppression optical system of the fly-eye lens as claimed in claim 1, wherein the speckle reduction optical component is a diffuser, ground glass or an array lens.
3. The laser speckle reduction optical system of a double fly-eye lens as claimed in claim 1, wherein the optical source lens group is a lens group whose optical path principle adopts the kohler illumination principle.
4. The laser speckle suppression optical system for a double fly-eye lens of claim 1, wherein the illumination optics group is a lens group whose optical path principle adopts the kohler illumination principle.
5. The laser speckle suppression optical system of the fly-eye lens as claimed in claim 1, wherein the display chip module is a DLP display chip, LCOS liquid crystal on silicon or LCD liquid crystal panel.
6. The laser speckle suppression optical system of a fly-eye lens as claimed in claim 1, further comprising a moving mechanical structure;
the moving mechanical structure is used for fixing the spot-dissipating optical component and driving the spot-dissipating optical component to reciprocate between the laser light source module and the first fly-eye lens.
7. The laser speckle suppression optical system of the fly-eye lens as claimed in claim 6, wherein the moving mechanism comprises a driving motor, a moving track, a moving trolley and a fixed slot;
the motion track is arranged between the laser light source module and the first fly-eye lens;
the moving trolley is arranged on the moving track, and the fixed clamping groove is arranged on the moving trolley and used for fixing the speckle-dissipating optical component;
the driving motor is electrically connected with the moving trolley to drive the moving trolley to reciprocate on the moving track.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223050549.0U CN218848559U (en) | 2022-11-16 | 2022-11-16 | Laser speckle suppression optical system of double fly-eye lenses |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223050549.0U CN218848559U (en) | 2022-11-16 | 2022-11-16 | Laser speckle suppression optical system of double fly-eye lenses |
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| CN218848559U true CN218848559U (en) | 2023-04-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116540487A (en) * | 2023-05-16 | 2023-08-04 | 合肥全色光显科技有限公司 | Dodging system of double fly-eye lens system |
| CN117389106A (en) * | 2023-12-08 | 2024-01-12 | 宜宾市极米光电有限公司 | Projection light source |
-
2022
- 2022-11-16 CN CN202223050549.0U patent/CN218848559U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116540487A (en) * | 2023-05-16 | 2023-08-04 | 合肥全色光显科技有限公司 | Dodging system of double fly-eye lens system |
| CN117389106A (en) * | 2023-12-08 | 2024-01-12 | 宜宾市极米光电有限公司 | Projection light source |
| CN117389106B (en) * | 2023-12-08 | 2024-04-02 | 宜宾市极米光电有限公司 | Projection light source |
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