High absorption coating
First Claim
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1. A multilayer coating system for the absorption of infrared energy and particularly adapted for application to a sapphire substrate which consists essentially of:
- (A) A vacuum deposited, opaque, first layer of titanium about 2000 to 3000 A in thickness;
(B) A vacuum deposited, semitransparent, third layer of titanium about 140 A in thickness;
(c) A vacuum deposited, dielectric, second layer of aluminum oxide about one quarter wave optical thickness at 2.8 micrometers positioned between and in contact with said first and third layers; and
(d) a vacuum deposited, dielectric, fourth layer superposed on said third layer.
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Abstract
A coating system characterized by a high degree of absorption of infrared energy and composed of a thin first layer of aluminum oxide, a thin, semitransparent second layer of titanium, a third dielectric layer of aluminum oxide and an opaque fourth layer of titanium.
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1 Claim
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1. A multilayer coating system for the absorption of infrared energy and particularly adapted for application to a sapphire substrate which consists essentially of:
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(A) A vacuum deposited, opaque, first layer of titanium about 2000 to 3000 A in thickness; (B) A vacuum deposited, semitransparent, third layer of titanium about 140 A in thickness; (c) A vacuum deposited, dielectric, second layer of aluminum oxide about one quarter wave optical thickness at 2.8 micrometers positioned between and in contact with said first and third layers; and (d) a vacuum deposited, dielectric, fourth layer superposed on said third layer.
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Specification
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Current AssigneeUnited States Of America As Represented By The Secretary Of The Air Force
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Original AssigneeUnited States Of America As Represented By The Secretary Of The Air Force
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InventorsPellicori, Samuel F., Monnier, Milton H.
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Primary Examiner(s)HERBERT JR, THOMAS
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Application NumberUS06/114,541Time in Patent Office559 DaysField of Search428/472, 427/35, 204/192 P, 350/164, 350/165US Class Current428/472CPC Class CodesF24S 2023/88 Multi reflective trapsF24S 70/225 for spectrally selective ab...F24S 70/25 Coatings made of metallic m...F24S 70/30 Auxiliary coatings, e.g. an...G01J 5/0853 having infrared absorbers o...G02B 5/003 Light absorbing elementsG02B 5/22 Absorbing filters G02B5/201...Y02E 10/40 Solar thermal energy, e.g. ...
