Lenticular lens sheet
US5724188A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Jul 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/625
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A double-faced lenticular lens sheet including at least one incident side lens formed on a first face of the double-faced lenticular lens sheet; and at least one corresponding emergent side lens formed on a second opposite face of the double-faced lenticular lens sheet; wherein light rays incident on the at least one incident side lens parallel to an optical axis thereof pass through the lenticular lens sheet and emerge from the at least one emergent side lens; an angle of refraction .theta.1 is formed by a straight line parallel to an optical axis of the at last one incident side lens and a light ray refracted by an incident plane passing through the lenticular lens sheet; an angle of refraction .theta.2 is formed by a straight line parallel to an optical axis of the at least one emergent side lens and the light ray refracted by and emitted from an emergent plane; .DELTA..theta.1 is an absolute value of the angle of refraction .theta.1 on the incident plane; .DELTA..theta.2 is an absolute value of an angle of refraction given by (.theta.2-.theta.1) on the emergent plane; a ratio between .DELTA..theta.1 and .DELTA..theta.2 given by (.DELTA..theta.2/.DELTA..theta.1) is 1.0 or more w…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.