Optical: systems and elements – Lens – Selective wavelength transmitting or blocking
Patent
1989-04-10
1992-12-22
Sugarman, Scott J.
Optical: systems and elements
Lens
Selective wavelength transmitting or blocking
359588, G02B 520
Patent
active
051738082
ABSTRACT:
A filter is provided for blocking a major portion of the light impinging thereon but transmitting three narrow spectral pass bands of light having selected wavelengths. The number of pass bands and the wavelengths included in each pass band are selected in accordance with environmental or military conditions dictating the wavelengths of light that need to be filtered. The transmitted narrow spectral pass bands preferably are spaced approximately equally about the CIE chromaticity diagram. The resulting filter enables exceptional seeing and color differentiation while positively blocking broad ranges of potentially injurious light from passing therethrough.
REFERENCES:
patent: 4933110 (1990-06-01), Tucker
patent: 4935166 (1990-06-01), Lee et al.
Auer Willem F.
Brown John A.
Thornton William A.
Casella Anthony J.
Hespos Gerald E.
Omega Optical Inc.
Sugarman Scott J.
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