Fresnel lens for integrated optics

Details Fresnel lens for integrated optics Fresnel lens for integrated optics

1980-06-23

1983-01-11

Nussbaum, Marvin L.

350452, G02B 5172, G02B 100

Patent

active

043679161

ABSTRACT:
Fresnel lens for integrated optics of the type having a number of overlayers deposited on the surface of a waveguide propagating a wave in accordance with a given propagation mode, the overlayer of order m starting from the axis is of width 1.sub.m =.sqroot.(m+1).lambda.f - .sqroot.m.lambda.f and is at the distance from the axis r.sub.m =.sqroot.m.lambda.f in which f is the focal distance of the lens, .lambda. the wavelength of the light in the guide and m a parameter successively assuming the different values of the natural sequence of integers from 1 to p+1, wherein the thickness and/or the length of each film is at least equal to the penetration of absorption distance of the wave guided in or beneath the overlayer for the adopted propagation mode.

REFERENCES:
Ashley et al.-"Fresnel Lens in a Thin-Film Waveguide", Appl. Phys. Lett. 33(6), Sep. 15, 1978; pp. 490-492.

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