Title:
OPTICAL SHEET
Document Type and Number:
WIPO Patent Application WO/2000/076742
Kind Code:
A1
Abstract:
An optical sheet produced by an injection molding method, having stresses, on the front surfaces of two opposing main planes, of up to 200 kg/cm?2¿, and being free from warp or deformation after molded. Each of stresses on the front surfaces of two opposing main planes of the optical sheet is preferably up to 200 kg/cm?2¿, and a stress difference between the two main planes up to 20%. The optical sheet is used for a Fresnel lens sheet and a lenticular lens sheet used for a screen sheet of a projection TV and projector, a condensing Fresnel lens sheet, and an emboss sheet.
Inventors:
ITO TOSHIYUKI (JP)
MATSUZAKI ICHIRO (JP)
SUZUKI MASAHIRO (JP)
WARINO KOICHI (JP)
MATSUZAKI ICHIRO (JP)
SUZUKI MASAHIRO (JP)
WARINO KOICHI (JP)
Application Number:
PCT/JP2000/003800
Publication Date:
December 21, 2000
Filing Date:
June 12, 2000
Export Citation:
Assignee:
KURARAY CO (JP)
ITO TOSHIYUKI (JP)
MATSUZAKI ICHIRO (JP)
SUZUKI MASAHIRO (JP)
WARINO KOICHI (JP)
ITO TOSHIYUKI (JP)
MATSUZAKI ICHIRO (JP)
SUZUKI MASAHIRO (JP)
WARINO KOICHI (JP)
International Classes:
B29C37/00; G02B3/00; G02B3/08; G03B21/62; (IPC1-7): B29C45/78; B29C71/02; G03B21/62; G02B3/06; G02B3/08
Foreign References:
| EP0450612A2 | 1991-10-09 | |||
| JPH08227003A | 1996-09-03 | |||
| US4793953A | 1988-12-27 | |||
| JPH0966541A | 1997-03-11 | |||
| US5399303A | 1995-03-21 |
Other References:
See also references of EP 1203651A4
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