Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-12-15
1994-02-22
Messinger, Michael
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
385 89, 385126, 25022728, 250226, H01J 314
Patent
active
052889920
ABSTRACT:
A filtering system is disclosed for receiving and bandpass filtering free space optical signals. The filtering system includes a plurality of optical fibers for accepting an optical signal. The fibers are implanted in an embedding material, having an index of refraction which is less than the optical fiber, for collimating the optical signal. The signal is further passed through a narrow, bandpass filter before detection by a photodetector device. In an alternative embodiment, the optical fibers are enclosed in a cladding, having a surface roughness at the interface of the cladding and the fiber, for enhancing the collimation of the optical signal.
REFERENCES:
patent: 4184749 (1980-01-01), Grossman
patent: 4225782 (1980-09-01), Kuppenheimer, Jr. et al.
patent: 4252408 (1981-02-01), Parsons et al.
patent: 4547040 (1985-10-01), Yamamoto et al.
patent: 4554447 (1985-11-01), Howard et al.
patent: 4818860 (1989-04-01), Hasegawa
patent: 4913518 (1990-04-01), Fine
patent: 4935630 (1990-06-01), Merchant
patent: 4991971 (1991-02-01), Geary et al.
patent: 5124859 (1992-06-01), Martin
patent: 5208890 (1993-05-01), Kohler et al.
Barry et al. High Speed Nondirective Optic Communication for Wireless Networks, IEEE Network Magazine, Nov. 1991, pp. 44-51.
Optical Filters and Coatings, Corion Corporation Oct. 1988.
Loss Mechanisms in Optical Light Pipes Remillard et al. Applied Optics, vol. 31, p. 7232, Dec. 1992.
High Collection Nonimaging Optics, Welford and Winston, Academic Press, 1989, pp. 57-58, 206.
Keene et al. Compact Infrared Heat Trap Optics vol. 17, No. 7, Applied Optics (1978).
GTE Laboratories Incorporated
Messinger Michael
Monks Lawrence E.
LandOfFree
Wide angle, narrow band optical filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wide angle, narrow band optical filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide angle, narrow band optical filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-173489