High resolution diffraction grating

Details High resolution diffraction grating High resolution diffraction grating

1982-07-27

1984-10-09

Evans, F. L.

Optics: measuring and testing

Range or remote distance finding

With photodetection

35016222, 35016223, 356305, G02B 518

Patent

active

044757921

ABSTRACT:
An optical prism, with an input surface, a reflecting surface and a base, and with a diffraction grating formed on the reflecting surface. The prism is designed so that if an input beam is incident normal to the input surface, then the efficiency of the order diffracted in the direction opposite the input beam is greater than a predetermined value. If the prism is fabricated of a material with index of refraction n, then the resolving power of the grating is increased by n.

REFERENCES:
patent: 2339053 (1944-01-01), Coleman
patent: 3034398 (1962-05-01), Barnes et al.
patent: 3658424 (1972-04-01), Elliott
patent: 3883221 (1975-05-01), Rigrod
Aoyagi et al., Optics Communications, vol. 29, No. 3, Jun., 1979, pp. 2535.
Hugh L. Garvin, E. Garmire, S. Somekh, H. Stoll and A. Yariv, "Ion Beam Micromachining of Integrated Optics Components" Applied Optics, vol. 12, No. 3; Mar., 1973; pp. 455-459.
E. G. Loewen, M. Neviere and D. Maystre "Grating Efficiency Theory as it Applies to Blazed and Holographic Gratings" Applied Optics, vol. 16, No. 10; Oct., 1977 pp. 2711-2721.

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