Speckle suppression motion device based on diffractive optical element

Abstract

The invention provides a speckle suppression motion device based on a diffractive optical element. The speckle suppression motion device comprises a flexible thin film provided with a diffractive optical microstructure, and synchronous belt pulley stand columns, wherein the flexible thin film provided with the diffractive optical microstructure comprises a flexible variable angle array diffractiveoptical microstructure and a transmission section, the transmission section is interlocked with the flexible variable angle array diffractive optical microstructure, the transmission section is of asingle-sided synchronous belt structure having trapezoidal teeth or arc teeth, the transmission section sleeves the left and right synchronous belt pulley stand columns, the transmission section is engaged with the synchronous belt pulley stand columns, one of the synchronous belt pulley stand columns is connected with a driving device for driving the synchronous belt pulley stand column to rotate, and the other synchronous belt pulley stand column is mounted on a frame. The speckle suppression motion device based on the diffractive optical element improves the transmission efficiency, reducesthe wear on the thin film by rotating the stand columns, improves the stability of the system, prolongs the service life of the flexible thin film provided with the diffractive optical microstructure, and improves the laser speckle suppression effect.

Description

technical field [0001] The invention belongs to the field of laser display projection, and in particular relates to an adaptive motion device using diffractive optical devices to suppress laser light shifts. Background technique [0002] With the development of laser, communication and computer technology, human beings have entered the information age. Due to its high brightness, low energy consumption, and good directionality, laser light sources are becoming the preferred light source in many fields. However, due to the high coherence of the laser, when it is reflected or transmitted on a rough surface, it will inevitably produce a kind of irregularly distributed spots on the surface of the scatterer, which we call speckle. The existence of speckle reduces the image quality and limits its application in display imaging and other fields. Therefore, it is very important to study the suppression technology and devices of laser speckle. [0003] In the existing research, th...

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Problems solved by technology

[0005] In order to overcome the deficiencies of the existing speckle suppression method based on crawler motion, such as low transmission efficiency, high wear, low stability, and poor laser speckle suppression effect, the present invention provides a method that improves transmission efficiency and reduces the number of rotating columns. Speckle suppression motion device based on diffractive optical elements to improve the wear of the film, improve the stability of the system, prolong the service life of the flexible film with diffractive optical microstructures, and improve the effect of laser speckle suppression

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