High-damage-threshold liquid crystal optical panel with arbitrary depolarization compensation and exposure device thereof

Abstract

The invention relates to a high-damage-threshold liquid crystal optical panel with arbitrary depolarization compensation and an exposure device thereof. The high-damage-threshold liquid crystal optical panel with arbitrary depolarization compensation is composed of a composite layer, and a spacer frame adhesive which coats the composite layer. The composite layer comprises a first dielectric filmlayer, a first glass substrate, a second dielectric film layer, a light-operated alignment film layer, a liquid crystal layer, a friction alignment film layer, a third dielectric film layer, a secondglass substrate and a fourth dielectric film layer which are sequentially connected from top to bottom. According to the invention, any polarization distribution gray-scale pattern generated by a reflective electric addressing liquid crystal light valve is inscribed on the light-operated orientation film layer of the liquid crystal optical panel; the high-damage-threshold liquid crystal optical panel with arbitrary polarization distribution has the characteristics of erasable performance, large aperture, high damage threshold, high compensation precision and the like; and the exposure device of the high-damage-threshold liquid crystal optical panel is simple in structure, easy to expand and low in cost.

Description

technical field [0001] The invention belongs to laser beam space shaping, and in particular relates to a high damage threshold liquid crystal optical panel with arbitrary depolarization compensation and an exposure device thereof. The invention is particularly suitable for compensating the problem of thermally induced polarization degradation in a high-power laser 1053nm (but not limited to this wavelength) system and exposing and processing the liquid crystal compensation panel. Background technique [0002] In a high-power laser beam transmission system, a single-polarized laser is generally used as the injection light source. After passing through the gain medium, the polarization characteristics of the laser are difficult to maintain its intrinsic state due to thermal effects, and the polarization state degrades. At present, technologies such as optical active crystal combined laser head and electric / optical addressing liquid crystal light valve are mainly used to compen...

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Problems solved by technology

Patents CN106451054A and CN107132673A use optically active crystals to combine laser heads to compensate for laser depolarization, and their structures are complex and require high performance of laser heads; patent CN108767644A uses optical addressable liquid crystal light valves to compensate thermally induced depolarization, and its structure is relatively simple. But the damage threshold is low, not suitable for depolarization compensation of high power laser systems

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