Optical rotor and device and method for inhibiting laser speckle based on optical rotor

Abstract

The embodiment of the invention discloses an optical rotor and device and method for inhibiting laser speckle based on the optical rotor. The device comprises a linear polarized light generator, an optical rotor, a modulating power supply and an imaging display system; the linear polarized light generator is used for generating linear polarized light; the optical rotor connects the linear polarized light generator with the modulating power supply; the optical rotor can be driven by the magnetism generated by modulating pulse pressure of the modulating power supply to rotate the linear polarized light sent by the linear polarized light generator in the polarizing direction, so as to obtain output linear polarized light which is orthogonal to the inputted linear polarized light; the modulating power supply is connected with the optical rotor and used for providing the modulating pulse pressure to the optical rotor; the imaging display system is used for projecting and displaying the linear polarized light outputted by the optical rotor. According to the technical scheme, the device has the advantages of being simple in structure, flexible and convenient to modulate, and wide in applicable scope; the device can be used in match with other speckle removing technologies so as to achieve a good speckle inhibiting and dispersing effect.

Description

[0001] This application is a divisional application of the Chinese invention patent application 201080067728.6 filed on September 3, 2010 with the title of "Optical Rotator and Laser Speckle Suppression Device and Method Based on Optical Rotator". technical field [0002] The invention relates to the technical field of laser display, in particular to an optical rotator and a laser speckle suppression device and method based on the optical rotator. Background technique [0003] Laser display is considered to be the next generation of display technology and has broad market prospects. Compared with other display technologies, laser display technology has the advantages of large color gamut display, high color saturation, and low power consumption. However, due to the high coherence of laser light, when the laser beam is scattered by the projection screen in the projection display optical system, interference patterns will be generated in space, which is called speckle. Speckl...

AI Technical Summary

Problems solved by technology

The existing technology uses the diversity of polarization to suppress speckle. The solution is mainly to suppress speckle by superimposing a large number of random polarization states of light. Due to the randomness of polarization states, it is difficult to reduce the speckle contrast by 1 / 2

Moreover, the prior art scheme of using polarization diversity to suppress speckle needs to add more polarization optics, which has low optical efficiency and slightly complicated optical path

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