Optical: systems and elements – Diffraction – From grating
Patent
1992-08-27
1994-08-09
Henry, Jon W.
Optical: systems and elements
Diffraction
From grating
359569, 359837, G02B 504, G02B 2746, H04N 572
Patent
active
053371810
ABSTRACT:
An optical filter 10 for filtering spatial frequencies from an output of an optical imaging system comprises a substantially transparent, or reflective, optical element 12 having a plurality of light refracting, or reflecting, segments 18 arranged on a surface thereof. Each of the plurality of segments 18 is provided with a predetermined angle of refraction, or reflection, distinct from adjacently located segments 18, wherein the different angles of refraction, or reflection, and the arrangement of the segments 18 on the optical element 12, are determined based on a desired spatial frequency transfer function for the filter 10. The optical spatial filter 10 reduces errors in optically formed images by accurately confining a broadened Point Spread Function (PSF) to a desired spot size.
REFERENCES:
patent: 2154360 (1939-04-01), Scheel et al.
patent: 3681519 (1972-08-01), Larsen et al.
patent: 3756695 (1973-09-01), Mino et al.
patent: 3768888 (1973-10-01), Nishino et al.
patent: 3781091 (1973-12-01), Ferguson
patent: 3821795 (1974-06-01), Okano
patent: 3851947 (1974-12-01), Montgomery
patent: 3911479 (1975-10-01), Sakurai
patent: 4477148 (1984-10-01), Tsuji et al.
patent: 4795236 (1989-01-01), Ise
patent: 5005968 (1991-04-01), Tejima et al.
patent: 5012274 (1991-04-01), Delgoff
patent: 5142413 (1992-08-01), Kelly
Henry Jon W.
Lyon Lyman R.
LandOfFree
Optical spatial 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 spatial filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical spatial filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-220494