Semi-thick transmissive and reflective sinusoidal phase grating

Details Semi-thick transmissive and reflective sinusoidal phase grating Semi-thick transmissive and reflective sinusoidal phase grating

1981-02-19

1984-01-17

Arnold, Bruce Y.

G02B 518

Patent

active

044261306

ABSTRACT:
Markedly increased optical efficiency for a first diffraction order of incident wave energy, such as light, is derived from a layer of transparent material having effectively two serially spaced sinusoidal phase gratings of the same line spacing, each formed as a surface relief pattern thereon, by prescribing the thickness of the layer, the amplitude of the gratings, the respective indices-of-refraction of the layers and of transparent materials bounding the phase grating surfaces thereof, and the angle of incidence of the wave energy.

REFERENCES:
patent: 3293331 (1966-12-01), Doherty

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