Spatial light modulator based on frustrated total internal reflection

Abstract

The invention discloses a spatial light modulator based on frustrated total internal reflection and belongs to the field of photoelectrons and lasers. The spatial light modulator comprises an incidentprism and an emergent prism; a first inclined plane is an incident inclined plane of the incident prism, a second inclined plane is a transmission inclined plane of the emergent prism, and the two inclined planes are oppositely distributed; incident light is subjected to frustrated total internal reflection between the incident prism and the emergent prism to generate transmission light and reflected light; the transmitted light and the reflected light are complementary in intensity and spatial distribution; the spatial light intensity distribution form of the transmitted light is modulated by adjusting the surface structure of the second inclined plane; and by adjusting the distance between the first inclined plane and the second inclined plane, the spatial light intensity of the transmitted light is modulated. The transmittance of the system is rapidly changed by changing the thickness of the air gap, continuously changing reflected light and transmitted light are obtained, and theoperation difficulty and the production cost are greatly reduced; and the spatial light modulator is made of a pure glass material, so that higher peak power and average power can be borne, and the power upper limit of the modulated light beam is improved.

Description

technical field [0001] The invention belongs to the field of optoelectronics and laser technology, and more specifically relates to a spatial light modulator based on frustrated total internal reflection. Background technique [0002] In the field of optics, the spatial distribution of beam intensity is an important technical index. In scientific research experiments and production processes, spatial intensity modulation of beams is often required. Spatial light modulation is a technology that controls the amplitude, frequency, phase, polarization state and duration of light waves to make them change according to certain rules. It has been widely used in optical communication, ranging, optical information processing, optical storage and display etc. At present, the commonly used spatial light modulation technologies are as follows: [0003] (1) Coating technology. The traditional coating technology is to coat the surface of the lens with a film layer of a specific material...

AI Technical Summary

Problems solved by technology

The deformable mirror is composed of many units, and each unit has its own independent controller. The surface structure of the deformable mirror can be changed by applying voltage or other methods. The disadvantage is that only the adjusted Reflected light cannot be used in occasions that require transmitted light, and each unit changes independently, so continuously changing modulated light cannot be obtained

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