A Spatial Light Modulator Based on Frustrated Total Internal Reflection

Abstract

The invention discloses a spatial light modulator based on frustrated total internal reflection, which belongs to the fields of optoelectronics and laser. The modulator includes an incident prism and an exit prism; the first inclined plane is the incident inclined plane of the incident prism, and the second inclined plane is the outgoing prism The two slopes are relatively distributed; the incident light undergoes frustrated total internal reflection between the incident prism and the exit prism, resulting in transmitted light and reflected light; the intensity and spatial distribution of the transmitted light and reflected light are complementary; by adjusting the second slope The surface structure modulates the spatial light intensity distribution of the transmitted light; by adjusting the distance between the first slope and the second slope, the spatial light intensity of the transmitted light is modulated. The present invention rapidly changes the transmittance of the system by changing the thickness of the air gap, obtains continuously changing reflected light and transmitted light, greatly reduces the difficulty of operation and production cost; and is made of pure glass material, which can withstand higher peak values power and average power, increasing the upper power limit of the modulated beam.

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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