Coating processes – Optical element produced – Transparent base
Patent
1988-09-23
1990-06-05
Arnold, Bruce Y.
Coating processes
Optical element produced
Transparent base
427162, 427165, 427166, 350166, B05D 506
Patent
active
049313150
ABSTRACT:
A thin-film optical interference filter designed and manufactured to have high transmission of blue light and high reflectance of infrared light. The novel feature of this filter rests in the thin-film layer design at the top and bottom of a quarterwave stack and the manufacturing technique by which this thin-film design is deposited. The thin-film layer design suppresses the so called halfwave holes which occur at wide angles of incidence of the incoming light. This desirable effect is achieved by the proper layer thickness and refractive index control in the manufacturing process.
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R. Jacobsson, "Inhomogeneous & Coevaporated Homogeneous Films for Optical Application", Physics of Thin Films Advances in Research and Development, vol. 8, 1975, p. 67.
Arnold Bruce Y.
GTE Products Corporation
Romanow Joseph S.
Shafer R. D.
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