Method of manufacturing a transparent light conducting element o

Details Method of manufacturing a transparent light conducting element o Method of manufacturing a transparent light conducting element o

1973-10-18

1976-05-04

Smith, Ronald H.

Coating processes

Optical element produced

Polarizer, windshield, optical fiber, projection screen, or...

260879, 260885, 260886, 526314, 526322, 350 96GN, 350 96WG, 427164, 427256, 427282, 427385, 427400, G02B 514, B32B 2702

Patent

active

039550150

ABSTRACT:
A method of manufacturing a light conducting element of synthetic resin in which a continuous change takes place in refractive index from the surface of the element toward its interior, which comprises bringing a transparent solid article of a network polymer which is in the incompletely polymerized state and contains 2 to 80% of a solvent-soluble component, into contact at its surface with a monomer capable of forming a polymer having a different refractive index from the network polymer thereby to cause the diffusion and migration of the monomer into the interior of the article through the contact surface, thereby setting up a gradient in the concentration of the monomer component in the interior of the above article which gradually decreases from the contact surface toward the interior, and simultaneously with, or after, this diffusion step, polymerizing the monomer in the interior of the article and completing the polymerization of the network polymer of the article. The article may be in the form of a fiber, rod, sheet or hollow cylinder.

REFERENCES:
patent: 2331716 (1943-10-01), Nadeau
patent: 2332461 (1943-10-01), Muskat
patent: 2912418 (1959-11-01), Johnson
patent: 3083118 (1963-03-01), Bridgeford
patent: 3485556 (1969-12-01), Naujokas
patent: 3658407 (1972-04-01), Kitano
patent: 3801181 (1974-04-01), Kitano
patent: 3816160 (1974-06-01), Moore
patent: 3819782 (1974-06-01), Irie
"Cylindrical Surfaces for Guiding Optical Waves," in IBM Technical Disclosure Bulletin, Vol. 13(6), Nov. 1970, p. 1574.
Ohtsuka, "Light Focusing Plastic Rod . . . ," in Appl. Phys. Lett., Vol. 23, No. 5, pp. 247-248, Sept. 1, 1973.

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