Optical element comprising a transparent substrate and an antire

Details Optical element comprising a transparent substrate and an antire Optical element comprising a transparent substrate and an antire

1983-09-12

1986-02-04

Corbin, John K.

350165, 350166, G02B 110, G02B 528

Patent

active

045681406

ABSTRACT:
An optical element comprises a transparent substrate. An antireflection coating is provided on the substrate for reducing reflections of wavelengths from approximately 700 nm to approximately 1700 nm. The coating comprises a plurality of stacked, uniform layers with refractive indices which decrease toward the top of the stack. A base coating is arranged between the layer stack and the substrate. The effective refractive index at the top of the base coating is at least 2.5, and the base coating is a graded index layer.

REFERENCES:
patent: 3804491 (1974-04-01), Morokuma et al.
Cox et al., Infrared Filters of Antireflected Si, Ge, InAs, and InSb, JOSA, Jul. 1961, vol. 51, pp. 714-718.

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