1976-12-08
1979-04-10
Stern, Ronald J.
350162R, G03H 106, G03H 132, G02B 2738
Patent
active
041485491
ABSTRACT:
A method, and apparatus for performing the method, of manufacturing a blazed diffraction grating by making a photographic record of the interference fringes produced at the intersection of two coherent secondary light beams derived from a common coherent primary light beam, in which one of the two secondary light beams is compressed or expanded in at least one dimension before it is incident on the region where intersection with the other beam takes place, the angle of intersection between the two secondary beams being such that they are perfectly in register across a certain plane in the region of intersection, the interference fringes formed at the plane being recorded photographically by exposing a photo-sensitive material, preferably an etchable photo-resist, at this plane. Expansion can be achieved by passing one of the recording beams through a prism or by effecting the separation of the primary beam into two secondary beams by means of a blazed diffraction grating.
REFERENCES:
patent: 3622220 (1971-11-01), Kogelnik
patent: 3728117 (1973-04-01), Heidenhain et al.
patent: 4054356 (1977-10-01), Noguchi
George et al., Applied Physics Letters, vol. 9, No. 5, Sep. 1966, pp. 212-215.
Stroke et al., Applied Physics Letters, vol. 7, No. 9, Nov. 1965, pp. 229-230.
Shank et al., Applied Physics Letters, vol. 23, No. 3, Aug. 1973, pp. 154-155.
Kato et al., Applied Optics, vol. 14, No. 5, May 1975, pp. 1093-1099.
Stern Ronald J.
The Rank Organisation Ltd.
LandOfFree
Diffraction gratings does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diffraction gratings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffraction gratings will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1068346