Resin composition for production of optical element, the optical element, and projection screen
US6650471B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 2002 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Sep 16, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/625
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A resin composition for production of an optical element being adapted to form the optical element has a characteristics of which, when W1/2 (° C.) represents, regarding a crest portion in a loss factor/temperature curve obtained by measuring the loss factor of the resin composition relative to a change in the temperature, the width of the crest portion at the position of ½ of the maximum value of the loss factor in the crest portion temperature range; W0.1 (° C.) represents, regarding the crest portion, the width of the crest portion at the position of 0.1 of the maximum value of the loss factor; and &Dgr;W (° C.), the difference between the widths of the two crest portions, is set to be &Dgr;W=W0.1−W1/2, the &Dgr;W is in the range of from 16° C. to 31° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.