Far-infrared sapphire window protection screen for night vision

A protective screen and sapphire technology, applied in the direction of instruments, optics, layered products, etc., can solve the problems that the far-infrared coating structure cannot be realized, and achieve the effect of good transparency and uniform coating composition
CN104536067AActive Publication Date: 2015-04-22ZHEJIANG XINGXING TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG XINGXING TECH CO LTD
Publication Date
2015-04-22

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Abstract

The invention provides a far-infrared sapphire window protection screen for night vision, and belongs to the technical field of optical equipment. The technical problems that far-infrared rays cannot permeate a coating film structure of the existing protection screen and the like are solved. The far-infrared sapphire window protection screen for night vision comprises a substrate made from sapphire, wherein the side of the substrate is coated by a multilayer film, and the multilayer film is formed by compounding a Ti3O5 coating with an SiO2 coating; high permeability is realized by the multilayer film at a visible light waveband from 420nm to 720nm, the cut-off is realized by the multilayer film at a waveband below 400nm, the cut-off is realized by the multilayer film at a near-infrared waveband from 720nm to 1100nm, and the high permeability is realized by the multilayer film at a far-infrared waveband above 1100nm. The far-infrared sapphire window protection screen for night vision provided by the invention has the advantages of stable optical properties, relatively low cost, good transparency, uniform coating components, realization of selective cut-off of light rays at different wavebands and the like.
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Description

technical field

[0001] The invention belongs to the technical field of optical equipment and relates to a far-infrared sapphire window protection screen for night vision. Background technique

[0002] With the rapid development of science and technology, the function of the window protection screen is also gradually improving, and the appearance of night vision function has also raised the technical requirements of optical coating, which needs to realize the transmission in the 8-14μm far infrared band, so as to achieve the night vision function. In addition, in terms of material, the surface hardness of sapphire is higher than that of other materials, and it is more resistant to scratches, which is more suitable for field operations of night vision products.

[0003] Related technologies such as patent CN01141694.7 discloses a protective film product capable of radiating far-infrared rays with a wavelength of 4 μm to 14 μm. Because certain ceramic materials can absorb ambie...

Claims

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