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A laser light path of dissipating spots, a two-color laser light source, and a three-color laser light source

A laser light source, speckle dissipation technology, applied in optics, optical components, instruments, etc., can solve problems such as speckle effect, and achieve the effect of reducing the degree of coherence, less quantity, and simple optical structure

Active Publication Date: 2018-09-21
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a laser speckle dissipation optical path, a two-color laser light source, and a three-color laser light source, which can improve the speckle dissipation effect of the laser and solve the speckle effect problem in the application of the laser light source

Method used

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  • A laser light path of dissipating spots, a two-color laser light source, and a three-color laser light source
  • A laser light path of dissipating spots, a two-color laser light source, and a three-color laser light source
  • A laser light path of dissipating spots, a two-color laser light source, and a three-color laser light source

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Embodiment 1

[0046] Embodiment 1 of the present invention provides a laser speckle dissipated optical path, such as Figure 4 As shown, including lasers 1, there can be one or more groups that emit laser light. The lasers can be blue lasers, red lasers or green lasers, and the specific color is not specifically limited.

[0047] A conical mirror 3 and a diffuser 4 placed behind the conical mirror are arranged in the optical path of the speckle elimination, and the combination of the conical mirror 3 and the diffuser 4 is the core component of the speckle dissipation. Among them, the conical mirror is used to homogenize the energy distribution of the incident laser beam and change the energy distribution type of the laser Gaussian beam. The degree of divergence of the beam enhances the diversification of the divergence angle.

[0048] Specifically, since the diameter of the laser spot emitted by the laser is about 60 mm, in order to improve the transmission efficiency and shaping efficienc...

Embodiment 2

[0062] In Embodiment 2 of the present invention, the difference from Embodiment 1 is that the beam shrinking part 2 can also use a large convex lens, and the apex of the conical mirror 3 is located at one focal length of the convex lens, as Figure 7 shown.

[0063] Depend on figure 1 It can be seen that the refraction of light at the vertex of the cone angle of the conical mirror is very obvious, and the light emitted from the vertex is in a divergent state. When the apex of the conical mirror 3 is located at the position of double the focal length of the convex lens, more rays converged by the convex lens can pass through the apex of the conical mirror 3, thereby more light beams can be scattered to a stronger degree , it is convenient to change the Gaussian laser beam into a Bessel-like beam distribution, the degree of dispersion and weakening of the beam energy at the divergence angle of 0 degrees and near the optical axis is stronger, and the degree of homogenization of ...

Embodiment 3

[0066] Embodiment 3 of the present invention provides a two-color laser light source, and applies the laser speckle light path described in Embodiment 1 to a two-color laser light source architecture. Specifically, such as Figure 9 As shown, the two-color laser light source includes a blue laser 11 and a red laser 12, which respectively emit blue laser and red laser. The blue laser and the red laser can be divided into one or more groups, and the two can be arranged side by side or vertically. The setting will be selected in consideration of the volume of combined light path and the complexity of the heat dissipation structure during specific implementation; and the fluorescent wheel 3 is set in the blue laser exit light path, including the fluorescent area (not shown in the figure) and the transmission area (not shown in the figure), the fluorescent area is provided with green fluorescent powder for being excited by blue laser light to generate green fluorescence, and the tr...

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Abstract

A laser dispersed spot optical path. By providing a conical lens (3, 23) and a diffusing member (4, 24), in a laser output path optical path the invention enables homogenization and shaping of a Gaussian laser beam, greatly weakening a beam portion having an optical axis near 0 degrees that causes high laser beam coherency, and combined with a diffusing effect of a diffusing member (4, 24), a diversity of beam divergence angles are formed, further reducing laser space coherency, resolving a problem of speckle upon using a laser light source. The invention relates to the technical field of laser display.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to a laser speckle light path and two-color and three-color laser light sources. Background technique [0002] Laser is a light source with high brightness, strong directionality, and monochromatic coherent light beam. Due to its many advantages, it has been gradually used as a light source in the field of projection display technology in recent years. The high coherence of the laser brings about the speckle effect in the laser projection display. The so-called speckle refers to the scattered light when the coherent light source irradiates a rough object. Interference occurs, some parts of the space have interference constructive, and some parts have interference destructive, the final result is granular light and dark spots on the screen, these unfocused spots appear to be in a flickering state to the human eye, for a long time Viewing is prone to dizziness and discomfort, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20G02B27/48
CPCG02B27/48G03B21/20
Inventor 田有良刘显荣李巍
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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