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Laser speckle optical path and laser projection light source system

A technology of speckle elimination and light path, which is applied in optics, optical components, instruments, etc., can solve the problems of general laser speckle dissipation effect, achieve the effect of solving speckle problem, reducing spatial coherence, and easy integration

Pending Publication Date: 2018-08-14
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technical solutions, the effect of laser speckle elimination is average, and the speckle phenomenon can still be observed on the projection screen. It is still necessary to further optimize the setting method of the diffuser to achieve the best effect of speckle dissipation.

Method used

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  • Laser speckle optical path and laser projection light source system
  • Laser speckle optical path and laser projection light source system
  • Laser speckle optical path and laser projection light source system

Examples

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Embodiment 1

[0037] Such as figure 1 As shown, in this embodiment, a laser speckle-dissipating light path and a laser projection light source system are provided, the power supply device 10 is driven to send pulse signals, and the green laser array 21, the red laser array 22 and the blue laser array 23 are respectively driven to emit The green, red, and blue lasers are synthesized into white light by the light-combining element 24. After the white light passes through the telescopic component 30, the aperture of the beam is compressed and becomes smaller, and then enters the dispersive spot optical path 40. In the laser dispersive spot, the laser beam undergoes multiple scattering and collimation. Then focus on the entrance of the light rod.

[0038] The optical path 40 of the laser speckle disappearance includes: a first diffusion part 41 and a second diffusion part 43, both of which are static diffusion sheets, and the third diffusion part 45 is a rotating diffusion wheel assembly; the f...

Embodiment 2

[0047] Such as Figure 4 As shown, Embodiment 2 of the present invention provides a laser speckle extinction optical path and a laser projection light source system. The laser speckle extinction optical path adopts the combination of two dynamic rotating diffusion wheel devices to achieve the purpose of dispersing speckles.

[0048] Specifically, the optical path 40 of the laser speckle elimination in this embodiment includes a first diffusion component 46, a lens assembly 47, and a second diffusion component 45; the first diffusion component 46 is a dynamic speckle elimination device, and the lens assembly 47 is a piece or A combination of multiple lenses is used to collimate or converge the laser beam; the second diffuser 45 is a dynamic speckle elimination device, and its technical solution and realized functions are the same as those of the third diffuser 45 in the first embodiment.

[0049] Specifically, the first diffusion member 46 is a rotating diffusion wheel structur...

Embodiment 3

[0056] Such as Figure 6 As shown, Embodiment 3 of the present invention provides a laser speckle extinction optical path and a laser projection light source system. The laser speckle extinction optical path adopts a combination of a static diffusion sheet and a dynamic rotating diffusion wheel device to achieve the purpose of dispersing speckles.

[0057] Specifically, in this embodiment, the optical path 40 of the laser speckle disappearance includes a first diffusion component 41, a first lens assembly 42, a second diffusion component 48, and a second lens assembly 44; the first diffusion component 41 is a static diffusion sheet; A lens assembly 42 is a combination of one or more lenses for collimating the divergent laser beam; the second diffusion component 48 is a dynamic speckle elimination device, including a first diffusion wheel 481, a second diffusion wheel 482 and a motor and a coaxial connection device 483; the second diffusion wheel 482 is close to the entrance po...

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Abstract

The invention discloses a laser speckle optical path and a laser projection light source system, and relates to the technical field of laser display. The system comprises a diffusion assembly and a lens assembly used for collimation and spotlight, the diffusion assembly is composed of at least two diffusion parts, wherein one of the diffusion parts is a dynamic speckle device, the other diffusionparts are static speckle devices, and the movement mode of the dynamic speckle device is cyclical rotation; and the lens assembly is arranged among the diffusion parts. The laser speckle optical pathand the laser projection light source system have the advantages that better speckle and facula homogenization functions can be achieved through the combined use of the dynamic diffusion assembly andstatic diffusion assemblies; the laser beams are diverged and collimated repeatedly to greatly reduce the spatial coherence of the laser beams, thereby effectively solving the problem of speckle; thelaser speckle optical path is simple in structure and small is size, and can be integrated easily in a laser display system to make the structure of an x ray machine more compact.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to a laser dispersing spot light path used in the light path of a laser projection lighting system and a laser projection light source system. Background technique [0002] As a newly developed projection technology, laser projection uses a diode laser as a light source, and the light is projected on the light modulation chip (DMD, LCD, LCOS, etc.) after being homogenized by the lighting system, and then imaged on the image surface through the projection lens. Among them, the high coherence of the laser causes the speckle effect in the laser projection display. Speckle refers to that when a coherent light source illuminates a rough object, the scattered light is generated in space due to the constant phase difference, the same light wave frequency, and the same vibration direction. Interference, some parts interfere constructively, and some parts interfere destructively. The f...

Claims

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Application Information

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IPC IPC(8): G02B27/48G03B21/20
CPCG02B27/48G03B21/2033G03B21/206G03B21/208Y02A90/10
Inventor 姜银磊何龙梁其鹏
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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