Optical filter

Details Optical filter Optical filter

1992-06-04

1998-02-03

Shafer, Ricky D.

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

359497, 359498, 359502, G02B 530

Patent

active

057150850

ABSTRACT:
An optical filter comprising a birefringent material which is interposed between a taking lens and an image pickup device for removing a component corresponding to a frequency multiplexing in a spacial frequency manner from a high frequency component contained in an image of an object. In the optical filter, the angle formed between its optical axis and an incident plane is smaller than an angle of 45.degree., preferably, approximately 35.degree..

REFERENCES:
patent: 3588224 (1971-06-01), Pritchard
patent: 3784734 (1974-01-01), Watanabe et al.
patent: 4575193 (1986-03-01), Greivenkamp, Jr.
patent: 4580878 (1986-04-01), Tsuji
patent: 4587553 (1986-05-01), Watanabe et al.
patent: 4624563 (1986-11-01), Johnson
patent: 4626897 (1986-12-01), Sato et al.
patent: 4743100 (1988-05-01), Nakada et al.
patent: 4807981 (1989-02-01), Takizawa et al.
patent: 4878737 (1989-11-01), Ise

Affiliated with

Also associated with

Rating

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 Optical filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-667730