Title:
SUBSTRATE FOR PLASTIC FRESNEL LENS
Document Type and Number:
Japanese Patent JP2007248675
Kind Code:
A
Abstract:
To provide a substrate for a plastic Fresnel lens which is hard to warp even made thin without causing uneven brightness and irregular images and not degrading workability when machining the lens.
The substrate for the Fresnel lens is a sheet made of a synthetic resin 0.1-1.0 mm thick and folded at least on one side.
COPYRIGHT: (C)2007,JPO&INPIT
Inventors:
OGAWA KAZUHIRO
Application Number:
JP2006070333A
Publication Date:
September 27, 2007
Filing Date:
March 15, 2006
Export Citation:
Assignee:
TSUTSUNAKA PLASTIC KOGYO
International Classes:
G03B21/62; G02B3/08
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