Single aspherical plano-convex collimator lens
US5371632A · kind A · utility
3Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1993 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | Jul 28, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A collimator lens system has a single plano-convex lens and a plane parallel plate. An aspherical surface of the single plano-convex lens is convex to the magnification-larger-than-unity side. The collimator lens system fulfills the following conditions: ##EQU1## where n represents a refractive index of the single plano-convex lens, d represents an axial thickness of the single plano-convex lens, f represents a focal length of the single plano-convex lens and dg represents a thickness of the plane parallel plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.