Wavelength encoded optical switches

Details Wavelength encoded optical switches Wavelength encoded optical switches

1988-06-24

1989-11-07

Lee, John D.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350 9613, 350315, 250227, G02B 636

Patent

active

048787221

ABSTRACT:
A switch mechanism (11) comprising a red LED light source (13), a filter assembly (15) and a photodetector assembly (17) is disclosed. The photodetector assembly (17) includes two filtered photodetectors (33 and 35) that are aligned with the light source (13) either directly or via a light canal (19). The filtered photodetectors (33 and 35) are designed to detect light in different narrow wavelength bands lying within the band of energy produced by the light source (13). The filter assembly (15) includes a two-position movable element (23) located between the light source (13) and the photodetector assembly (17). The movable element (23) includes two sections (25 and 27) having different light-passing abilities. In one of the movable element positions one section (25) is located between the light source and both filtered photodetectors and in the other movable element position the other section (27) is located therebetween. Preferably, one section (25) is a thin slab of transparent material and the other section (27) is a thin slab of filter material. The transmittance of the filter dye slab (27) is such that the ratio of the energy detected by the filtered photodetectors (33 and 35) when the filter dye slab (27) is located between the light source (13) and the filtered photodetectors (33 and 35) is different than the ratio of the energy detected when the transparent slab (25) is located between the light source (13) and the filtered photodetectors (33 and 35). Thus, the difference in ratios determines the position of the movable element (23).

REFERENCES:
patent: 3459951 (1969-08-01), Howarth et al.
patent: 3489906 (1970-01-01), Dalle-Finn Beer et al.
patent: 4040741 (1977-08-01), Swift
patent: 4045667 (1977-08-01), Hanson
patent: 4284885 (1981-08-01), Swensen
patent: 4308456 (1981-12-01), Van Der Gaag et al.
patent: 4315147 (1982-02-01), Harmer
patent: 4345840 (1982-08-01), Goetz et al.
patent: 4379968 (1983-04-01), Ely et al.
patent: 4617461 (1986-10-01), Subbarao et al.
patent: 4641026 (1987-02-01), Garcia, Jr.
patent: 4692612 (1987-09-01), Havel

Affiliated with

Also associated with

Rating

Wavelength encoded optical switches does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wavelength encoded optical switches, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wavelength encoded optical switches will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-79495