Coating processes – Measuring – testing – or indicating
Patent
1981-04-15
1983-01-18
Hoffman, James R.
Coating processes
Measuring, testing, or indicating
427 531, 427 541, 427 55, B05D 306, G02B 300
Patent
active
043692028
ABSTRACT:
A method for forming a Luneburg lens having a predetermined focal length on an optical waveguide includes fabricating the lens on a waveguide from a photorefractive material and then exposing the lens to energy radiation, particularly ultra violet light, to thereby adjust the refractive index until the predetermined focal length is established.
REFERENCES:
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S. K. Yao and D. B. Anderson, Shadow Sputtering Diffraction-Limited Waveguide Luneburg Lenses, App. Phys. Lett. 33,307 (Aug. 1978).
S. A. Keneman, et al., Evaporated Films of Arsenic Trisulfide: Dependence of Optical Properties on Light Exposure and Heat Cycling, J. Opt. Soc. Am., 68, 32 (Jan. 1978).
J. S. Berkes, et al., Photodecomposition of Amorphous As.sub.2 Se.sub.3 and As.sub.2 S.sub.3, J. Appl. Phys., 42, 4908 (Nov. 1971).
R. G. Brandes, et al., Optically Formed Dielectric Gratings in Thick Films of Arsenic-Sulfur Glass, Applied Optics, 9, 1712 (Jul. 1970).
Y. Ohmachi and T. Igo, Laser-Induced Refractive-Index Change in As-S-Ge Glasses, App. Phys. Letter., 20, 506 (Jun. 1972).
S. K. Yao, et al., Guided-Wave Optical Thin-Film Luneburg Lenses: Fabrication Technique and Properties, Appl. Optics, 18, 4067 (1979).
Verber Carl M.
Wood Van E.
Canon Kabushiki Kaisha
Hoffman James R.
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