Method and apparatus to effectively eliminate optical interference structure in detector response

摘要: A method and apparatus are provided to eliminate spectral interference variation contained in optical signals transmitted an detector or array of detectors, the deriving from presence a layer deposited on having different index refraction detector. The practice invention involves optically coupling plate using adhesive, with proviso that plate, adhesive have substantially same so composite thickness refractive is formed. Given inverse relationship between period wavenumber, effective increase yields corresponding decrease period. Hence, may be selected such layer, sufficient it masked by normal shift structure over range incident angle input onto thereby effectively eliminating variation.