A Laser Speckle Dissipation Device Based on the Combination of Polarization Diversity and Angle Diversity
A variety of speckle elimination technology, applied in optics, optical components, instruments, etc., can solve the problems of low energy consumption, light loss, and little effect of eliminating speckle in the vibration drive system, and achieve improved image quality, low energy consumption, and high The effect of color saturation
Active Publication Date: 2022-01-11
ZHONGBEI UNIV
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Problems solved by technology
[0006] In order to overcome the deficiencies in the prior art, the present invention provides a laser speckle elimination device based on the combination of polarization diversity and angle diversity. , there are the following disadvantages: From the increase of operating frequency, the elimination of mechanical noise, the stability and low energy consumption of the vibration drive system to the reduction of cost and the miniaturization of the system, it has become a challenge in the process of productization; or the use of wavelength diversity combined with time averaging The principle of speckle suppression, such as control scheme, light scattering method, or the effect of eliminating speckle is little, or there is a certain light loss
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] Such as figure 1As shown, a laser speckle elimination device based on the combination of polarization diversity and angle diversity, a laser, a collimator lens, a beam combiner 107, a static speckle elimination device based on polarization diversity, and a laser speckle elimination device based on angle diversity are sequentially arranged along the optical path. Static speckle elimination device 400, scattering sheet 109, light pipe 110, relay lens grou...
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The present invention relates to the field of laser display technology, more specifically, to a laser speckle elimination device based on the combination of polarization diversity and angle diversity. Lasers, collimating lenses, beam combiners, and polarization diversity-based A static speckle elimination device, a static speckle elimination device based on angle diversity, a diffuser, a light pipe, a relay lens, a digital micromirror device, a projection lens group and an observation screen. Adding the corresponding wave plate to the light source part, without making any changes to the laser display system, the laser speckle reduction combined with various speckle suppression technologies can be realized in a non-moving way. According to the characteristics of the laser projection system, a laser speckle suppression scheme is designed, which does not affect the overall structure of the projection system and can suppress laser speckle. The structure is simple, the cost is low, and the consistency and stability of the system are high.
Description
technical field [0001] The present invention relates to the technical field of laser display, and more specifically, to a laser speckle-eliminating device based on the combination of polarization diversity and angle diversity. Background technique [0002] With its advantages of wide color gamut, high brightness, high color saturation, low energy consumption, and long life, laser is considered to be an ideal light source to replace traditional light sources (such as high-pressure mercury lamps or xenon lamps) in the field of information display, and is widely used in Rear projection TV, projector, pico projector, car display and other industries, as well as the field of modern high-end display technology. [0003] However, the laser light source is a highly coherent light, and its inherent spatial and temporal coherence makes it reflect or transmit through a rough surface (such as a screen), the optical path difference is caused by the height fluctuation of rough surface ele...
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IPC IPC(8): G02B27/48
CPCG02B27/48
Inventor徐美芳王浩全董剑龙任时磊解琨阳王志斌张敏娟张荣臻
OwnerZHONGBEI UNIV