Optical: systems and elements – Diffraction – From grating
Patent
1997-02-20
2000-11-07
Schuberg, Darren
Optical: systems and elements
Diffraction
From grating
359737, 2502019, 348335, G02B 518
Patent
active
061444936
ABSTRACT:
An optical low-pass filter comprises a phase advancing area which advances a phase of a wavefront of an incident pencil of rays with respect to a phase of a wavefront of a center of the incident pencil of rays, and a phase retarding area which retards the phase of the wavefront of the incident pencil of rays with respect to the phase of the wavefront of the center of the incident pencil of rays, the phase advancing area and the phase retarding area alternately existing in the optical low-pass filter, and an optical apparatus comprises an image forming optical system, an image pickup element, and such an optical low-pass filter.
REFERENCES:
patent: T909010 (1973-04-01), Kelch
patent: 5142413 (1992-08-01), Kelly
patent: 5471344 (1995-11-01), Sugawara
"Antialiasing--Lenses of Too High Quality", W. Kroninger, et al., Laser Und Optoelektronik, DE, Fachverlag GMBH. Stuttgart, vol. 25, No. 5, pp. 48-52, XP000395058, ISSN: 0722-9003.
Born, M., et al., Section 9.4: "The Diffraction Pattern Associated with a Single Aberration", Principles of Optics (5th Ed.), published by Pergamon Press, pp. 473-478 (1975).
Kobayashi Shuichi
Okuyama Atsushi
Wada Ken
Canon Kabushiki Kaisha
Schuberg Darren
LandOfFree
Optical low-pass filter and optical apparatus having the same 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 low-pass filter and optical apparatus having the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical low-pass filter and optical apparatus having the same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1647209