Optical coating and configuration for tailored spectral...

Optical: systems and elements – Light interference – Produced by coating or lamina

Reexamination Certificate

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C359S589000, C359S584000

Reexamination Certificate

active

10956230

ABSTRACT:
An optical system employs an optical coating on a substrate positioned relative to an optical collection system. The thickness of the coating is tailored such that light perceived by the collection system over prescribed angles of acceptance has a spectral content that is unchanged, or changed in a prescribed manner, from that entering the system when the sensor is oriented in the “look ahead” direction. The thickness of the coating is varied so that the wavelengths transmitted or reflected correspond to those required by a specific application. The invention is adaptable to system requirements that are centered about a single wavelength, or that require multiple wavelengths. The optical coating can take any of a number of forms, including stacked dielectric layers and rugate filters.

REFERENCES:
patent: 4666250 (1987-05-01), Southwell
patent: 4756602 (1988-07-01), Southwell et al.
patent: 4832448 (1989-05-01), Jones
patent: 4952025 (1990-08-01), Gunning, III
patent: 5000575 (1991-03-01), Southwell et al.
patent: 5181143 (1993-01-01), Southwell
patent: 5410431 (1995-04-01), Southwell
patent: 6984038 (2006-01-01), Ishak
patent: 2003-177319 (2006-06-01), None

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