Radiation hardening self-cleaning nano-optical protection film
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A nano-optical and self-cleaning technology, applied in optics, optical components, instruments, etc., can solve problems such as poor anti-radiation and dust-proof effects, film pollution, film coloring, etc.
Inactive Publication Date: 2005-03-23
HARBIN INST OF TECH
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However, after long-term exposure to the space radiation environment, these films will be colored, and the spectral transmittance will decrease significantly.
Also, these films will be quickly fouled in the presence of organic constituents in the surrounding environment
Th...
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specific Embodiment approach 1
[0004] Specific embodiment one: the composition of protective film of this embodiment comprises tetrabutyl titanate, dehydrated alcohol, dimethylformamide, hydrochloric acid, glacial acetic acid, water, also comprises Ce(NO 3 ) 3 and LaCl 3 Ingredients, the parts by weight of each component are: 1-4 parts of tetrabutyl titanate, 3-9 parts of absolute ethanol, 0.001-1 part of dimethylformamide, 0.01-1 part of hydrochloric acid, 0.1-1 part of glacial acetic acid parts, 0.02 to 1 part of water, Ce(NO 3 ) 3 0.001~0.04 parts, LaCl 3 0.003 to 0.05 parts. The preparation method of the protective film of the present invention is as follows: at room temperature, half of the required parts by weight of tetrabutyl titanate is mixed with ethanol to prepare solution A, and LaCl 3 Mix with dimethylformamide to make solution B, mix the other half of ethanol with water, hydrochloric acid, glacial acetic acid, Ce(NO 3 ) 3 The solution C is made by mixing, and the solution B and C are ad...
specific Embodiment approach 2
[0005] Specific embodiment two: The parts by weight of each component in this embodiment are: 2 parts of tetrabutyl titanate, 5 parts of absolute ethanol, 0.03 part of dimethylformamide, 0.05 part of hydrochloric acid, 0.2 part of glacial acetic acid, water 0.05 parts, Ce(NO 3 ) 3 0.008 parts, LaCl 3 0.01 part.
specific Embodiment approach 3
[0006] Specific embodiment three: the parts by weight of each component in this embodiment are: 3 parts of tetrabutyl titanate, 7 parts of absolute ethanol, 0.08 part of dimethylformamide, 0.08 part of hydrochloric acid, 0.8 part of glacial acetic acid, water 0.08 part, Ce(NO 3 ) 3 0.02 parts, LaCl 3 0.04 parts.
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Abstract
The invention discloses a radiation resistant selfpurging nanometer protective film, it relates to a protective film which can be used on surfaces of optical parts of an apparatus. The current films can be dyed, after accepting air radicalization for a long period, spectrum transmittance decreases greatly. And the films are easily polluted rapidly. The elements weight fraction of the invention are: tetrabulyl titanate 1-4 shares, absolute ethyl alcohol 3-9 shares, dimethyl formamide 0.001-1 shares, hydrochloric acid 0.01-1 shares, glacial acetic acid 0.1-1 shares, water 0.02-1 shares, Ce(NO3)3 0.001-0.04 shares, LaCl3 0.003-0.05 shares. The protective film of the invention, the size of nanometer structure can reach 20-30nm; the spectrum transmissibility of visible area can reach more than 88%, the degradation ratio of normal organic contamination of spacecraft can reach 40-60%; under charged particle irradiation of 2X10 to power 16 particles/cm2 dosage, the spectrum transmissibility can be reduced less than 10%.
Description
Technical field: [0001] The present invention relates to a protective film used on optical devices. Background technique: [0002] Optical systems are important payloads of spacecraft. Under the action of space environmental factors, the surface performance of optical devices will degrade, which will lead to a significant decline in the performance of the entire system. Therefore, active protection of optical surfaces is one of the important ways to improve the reliability and life of spacecraft. At present, SiO2 is mostly used at home and abroad 2 , MgF 2 , LiF and other crystal thin films are used as protective films for space optical surfaces. The advantages of these thin films are that they have good spectral transmission performance and play a good role in protecting optical surfaces. However, after long-term exposure to the space radiation environment, these films will be colored, and the spectral transmittance will decrease significantly. Also, these films will b...
Claims
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