Optical band-pass filter having two pass bands

Details Optical band-pass filter having two pass bands Optical band-pass filter having two pass bands

1995-06-21

1997-04-29

Epps, Georgia Y.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359589, 359629, G02B 528, G02B 2714

Patent

active

056254946

ABSTRACT:
An optical band-pass filter adapted for enabling mutually independent fine adjustments of two pass bands. The optical band-pass filter comprises a first filter having a first pass band, first and second reflective films for respectively reflecting the transmitted light and the reflected light obtained from the first filter film, and a second filter film having a second pass band different from the first pass band and serving to combine the light out of the first and second reflective films with each other.

REFERENCES:
patent: 5245449 (1993-09-01), Ooi
patent: 5363455 (1994-11-01), Nishi

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