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Title:
DISTRIBUTED INDEX MEDIUM AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JPS60237401
Kind Code:
A
Abstract:

PURPOSE: To produce easily a distributed index medium having the refractive index changing stepwise in the optical axis direction and a low aberration by laminating plural planar media having the refractive indices different from each other in order of the refractive indices.

CONSTITUTION: Plural optical planar glass plates 1 having the refractive indices different from each other are prepd. The plates 1 are laminated in order of the refractive indices by adhesion or melt-sticking and are made thinner by heating and stretching if necessary. The intended distributed index medium 2 having the refractive indices changing stepwise in the optical axis direction is obtd. The production of the medium 2 is also possible by supplying a gaseous raw material for forming glass to a burner for synthesizing fine glass particles, forming the fine particles for forming glass consisting essentially of SiO2 and contg. a dopant to adjust the refractive indices by a flame hydrolysis method and sticking and growing the fine particles on the substrate from the direction perpendicular thereto while changing the concn. of the dopant then vitrifying the particles.


Inventors:
MOMOKITA KAZUTAKA
TOOYAMA MINORU
Application Number:
JP9354484A
Publication Date:
November 26, 1985
Filing Date:
May 10, 1984
Export Citation:
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Assignee:
NIPPON SHEET GLASS CO LTD
International Classes:
B32B7/02; G02B3/00; (IPC1-7): B32B7/02; G02B3/00
Domestic Patent References:
JPS56154707A1981-11-30
JPS5727215A1982-02-13
JPS5954631A1984-03-29



 
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