Laser blocking filter with neutral transmission color

Details Laser blocking filter with neutral transmission color Laser blocking filter with neutral transmission color

1997-11-21

1999-10-12

Henry, Jon

Optical: systems and elements

Light interference

Produced by coating or lamina

359589, 359590, G02B 528

Patent

active

059662409

ABSTRACT:
A filter system for reflectively blocking laser radiation in the visible spectrum includes a multilayer interference structure arranged for reflectively blocking a continuous band of wavelengths including the laser radiation and transmitting other wavelengths in the visible spectrum. The filter system is arranged to control transmission of the other wavelengths of the visible spectrum such that the filter system has an essentially neutral transmission color and maximum photopic transmission consistent with the band of wavelengths reflectively blocked.

REFERENCES:
patent: Re33729 (1991-10-01), Perilloux
patent: 3947092 (1976-03-01), Flad
patent: 4601533 (1986-07-01), Moss
patent: 4655540 (1987-04-01), Wood et al.
patent: 4896928 (1990-01-01), Perilloux et al.
patent: 5035485 (1991-07-01), Kageyama
patent: 5194989 (1993-03-01), Ferrante et al.
patent: 5238738 (1993-08-01), Miller
patent: 5576886 (1996-11-01), Ferrante

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