Narrow band reflection polarizer

Details Narrow band reflection polarizer Narrow band reflection polarizer

1975-08-18

1978-05-16

Corbin, John K.

350152, G02B 514

Patent

active

040895823

ABSTRACT:
The invention discloses a wave guide structure utilizing a narrow band reflection polarizer comprising a substrate and a multiple layer dielectric for a generally incident unpolarized electromagnetic wave of wavelength .lambda..sub.1 in the ultraviolet, visible, and infrared regions. The dielectric layers comprise a medium having an index of refraction n.sub.o, and at least two layers deposited by vaporization of material having alternatively high and low indices of refraction, n.sub.2 and n.sub.1, respectively. The layers having the high and low refractive indices exhibit the same effective optic layer thickness equal to (1/4) (j+1) .lambda..sub.1, where j = even integers, for the refractive index structure n.sub.s (n.sub.1, n.sub.2).sup.k n.sub.o, or n.sub.s (n.sub.1, n.sub.2).sup.k n.sub.1 n.sub.o and n.sub.1 = index of refraction of the first layer connected to the medium, n.sub.2 = index of refraction of the second layer connected serially to the first layer, and k = 0, 1, 2, . . . The resulting reflected wave is polarized parallel or vertically to the plane of incidence.

REFERENCES:
patent: 3905676 (1975-09-01), Ulrich

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