Bi-level phase grating focusing plate

Details Bi-level phase grating focusing plate Bi-level phase grating focusing plate

1981-08-25

1986-07-08

Arnold, Bruce Y.

350169, G02B 518, G02B 2710

Patent

active

045989770

ABSTRACT:
An improved phase grating focusing plate has, formed on a base surface thereof, a number of fine unit patterns, each of which has a plurality of projections and/or recessions or a plurality of sets of alternatively arranged ring-shaped concentric projections and recessions in a spaced and symmetrical configuration. The ratio .gamma. of the sum of the areas of the projections or recessions to the overall area of the unit pattern is determined to be 0.25.ltoreq..gamma.<0.5 for light having a wavelength ranging from 0.46 .mu.m to 0.64 .mu.m, and the phase difference .theta. of the light due to the level difference between the projections or the recessions and the surface of the focusing plate is determined to be .pi..

REFERENCES:
patent: 3547546 (1970-12-01), Schier

Affiliated with

Also associated with

Rating

Bi-level phase grating focusing plate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bi-level phase grating focusing plate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bi-level phase grating focusing plate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1448559