Reflecting telescope with correcting lens
US4477156A · kind A · utility
19Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1981 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Oct 29, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A reflecting telescope is provided in which a meniscus lens corrects for coma of the primary parabolic reflecting mirror, and also for coma and spherical aberration of an eyepiece, when an eyepiece is used. The meniscus lens may be formed from a plano-concave lens and a plano-convex lens positioned with their planar sides mutually parallel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.