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A night vision compatible filter with high and low temperature resistance and high visible light transmission and preparation method

A night vision compatible, high and low temperature resistant technology, applied in the direction of filters, optics, optical components, etc., can solve the problems of high visible light transmittance, can not take into account the high and low temperature environment, etc., to achieve good cut-off performance, excellent performance, simple craftsmanship

Active Publication Date: 2022-07-26
上海戎科特种装备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a night vision compatible filter with high and low temperature resistance and high visible light transmission and a preparation method, which is used to overcome the inability to take into account the high and low temperature environment, near-infrared absorption and high visible light transmittance in the prior art. defect

Method used

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  • A night vision compatible filter with high and low temperature resistance and high visible light transmission and preparation method
  • A night vision compatible filter with high and low temperature resistance and high visible light transmission and preparation method
  • A night vision compatible filter with high and low temperature resistance and high visible light transmission and preparation method

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preparation example Construction

[0031] The present invention also provides a preparation method of a night vision compatible filter with high and low temperature resistance and high visible light transmission, comprising the following steps:

[0032] S1: Weigh the near-infrared absorber, the organic solvent and the transparent host resin in parts by mass of 0.1-0.5, 60-80 and 40-50, mix them evenly, and place them in a glassware for 24 hours. After the organic solvent is completely volatilized Transfer to a 100°C oven for complete drying for 1 hour, then heat treatment at 120°C and hot-press molding to obtain a near-infrared absorption layer with a thickness of 0.5-1 mm;

[0033] S2: weigh polymethyl methacrylate, dodecyltrimethoxysilane, Hexafluorobutyl methacrylate, ethyl orthosilicate, lanthanum stearate, stearic acid, and nano-titanium dioxide were mixed uniformly and added to the reaction vessel, heated to 60-100°C, and stirred for 2.0-4.0 h. Cooling to get anti-reflection protective coating;

[0034]...

Embodiment 1

[0055] This embodiment provides a night vision compatible filter that is resistant to high and low temperatures and has high visible light transmission. The night vision compatible filter is a layered structure, including a near-infrared absorption layer and an antireflection coating layer. The film layer is attached to one side of the near-infrared absorption layer; the thickness of the anti-reflection film layer is 60 μm, and the thickness of the near-infrared absorption layer is 1.0 mm; the expansion coefficients of the near-infrared absorption layer and the anti-reflection film layer are the same , the refractive index is different.

[0056] The present embodiment also provides a method for preparing a night vision compatible filter with high and low temperature resistance and high visible light transmission as described above, comprising the following steps:

[0057] (1) to (4) are the same as Comparative Example 1;

[0058] (5) adopting 120 ℃ of heat treatment for the n...

Embodiment 2

[0065] This embodiment provides a night vision compatible filter that is resistant to high and low temperatures and has high visible light transmission. The night vision compatible filter is a layered structure, including a near-infrared absorption layer and an antireflection coating layer. The film layer is attached to one side of the near-infrared absorption layer; the thickness of the anti-reflection film layer is 60 μm, and the thickness of the near-infrared absorption layer is 1 mm; the expansion coefficients of the near-infrared absorption layer and the anti-reflection film layer are the same, The refractive index is different.

[0066] The present embodiment also provides a method for preparing a night vision compatible filter with high and low temperature resistance and high visible light transmission as described above, comprising the following steps:

[0067] (1) with embodiment 1;

[0068] (2) Weigh the near-infrared absorber, chloroform and polymethyl methacrylate...

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Abstract

The invention discloses a night vision compatible filter with high and low temperature resistance and high visible light transmission and a preparation method. The night vision compatible filter has a layered structure and includes a near-infrared absorption layer and an antireflection film layer, and the antireflection film The thickness of the anti-reflection film layer is 40-90 μm, and the thickness of the near-infrared absorption layer is 0.5-1 mm; the preparation method includes the preparation of the near-infrared absorption layer, the preparation of the anti-reflection protective coating and the night vision Compatible with steps such as filter preparation. The night vision compatible filter provided by the invention has excellent high and low temperature resistance performance, and the night vision compatible filter has good cut-off performance for light in the range of 650-900 nm, and its average transmittance is only 0.2%, And the transmittance in the visible light region of 400 to 630 nm is more than 50%. The preparation method provided by the invention has a simple process, and the prepared night vision-compatible optical filter takes into account high and low temperature environment resistance, near-infrared absorption and high visible light transmittance.

Description

technical field [0001] The invention relates to the technical field of night vision compatible materials, in particular to a night vision compatible filter with high and low temperature resistance and high visible light transmission and a preparation method. Background technique [0002] Night vision compatible technology refers to eliminating the light and radiation emitted by the lighting system that interfere with the work of the night vision device through certain technical means, so as to ensure the normal operation of the night vision device. This requires night vision compatible materials to have good cut-off performance in the 660nm~900nm red light region and near-infrared red light region, and also need to ensure sufficient transmittance in the 400nm~630nm visible light region. At the same time, due to the different environments in which night vision devices are used, the material also needs to have excellent high and low temperature resistance. Traditional night v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/20G02B5/22G02B1/111C09D4/06C09D4/02C09D7/61C09D7/63
Inventor 陶益杰张朝阳袁源郑欣周建伟闫佳
Owner 上海戎科特种装备有限公司
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