Optical: systems and elements – Single channel simultaneously to or from plural channels – By surface composed of lenticular elements
Patent
1992-01-06
1994-04-05
Arnold, Bruce Y.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By surface composed of lenticular elements
359620, 359900, G02B 2710
Patent
active
053010639
ABSTRACT:
A method of fabricating an LED lens array which uses light of the constituent LEDs of the LED array as a light source for directly forming lenses on the LED array. This simplifies the fabrication process and decreases attenuation. The method involves depositing a mask in a desired pattern upon a substrate member bearing an n-type conductivity layer and, subsequently, forming a p-n junction therein by diffusion of an impurity into the n-type conductivity region to form a p-type conductivity region in a portion thereof. Following the application of electrodes and the deposition of a protective layer upon the resultant structure, a forward bias is applied to the electrodes. This results in the emission of light which is used to form a convex lens on the structure by optical chemical vapor deposition. Alternatively, the lens may be formed by first depositing a polymeric resin on a portion of the protective layer and upon the application of a forward bias to the electrodes light emitted at the p-n junction photoploymerizes the resin so as to cause hardening thereof in accordance with the intensity distribution profile of light emitted by the diode.
REFERENCES:
patent: 3981023 (1976-09-01), King et al.
patent: 4667092 (1987-05-01), Ishihara
Arnold Bruce Y.
Close Thomas H.
Eastman Kodak Company
Phan James
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