Technique to eliminate scattered light in diffractive optical el

Details Technique to eliminate scattered light in diffractive optical el Technique to eliminate scattered light in diffractive optical el

1996-04-29

1998-09-01

Epps, Georgia Y.

Optical: systems and elements

Lens

With multipart element

359520, G02B 308, G02B 512

Patent

active

058018891

ABSTRACT:
Diffractive optics using surface relief profiles, also known as blazed gratings having ramps and edges or steps (also referred to as blazed facets with discontinuities at the interfaces between adjacent facets) defining grating lines and phase delays to which light propagating through the grating are subject. Diffractive lenses which are known as phased Fresnel zone plate lenses or kinoforms, also have annular blazed facets with discontinuities, steps at the interface between adjacent facets at the steps which facets define the zones of the lens. These steps are either aligned parallel to the light incident on the grating or coated with an optically opaque material, thereby preventing the transmission of incident light which is not diffracted, but would be scattered or transmitted at the steps. The contrast and quality of an image provided by the diffractive lens at a plane spaced from the grating, which may be the focal plane of the diffractive lens, is therefore enhanced.

REFERENCES:
patent: 3237508 (1966-03-01), Keller et al.
patent: 3784282 (1974-01-01), Yamazaki et al.
patent: 4210391 (1980-07-01), Cohen
patent: 4995715 (1991-02-01), Cohen
patent: 5080465 (1992-01-01), Laude
patent: 5260828 (1993-11-01), Londono et al.
patent: 5543966 (1996-08-01), Meyers

Affiliated with

Also associated with

Rating

Technique to eliminate scattered light in diffractive optical el does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Technique to eliminate scattered light in diffractive optical el, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Technique to eliminate scattered light in diffractive optical el will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-276088