Modified gauss type photographic lens
US4139265A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1977 |
| Grant date | Feb 13, 1979 |
| Priority date | — |
| Expiry date | Jan 6, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A modified Gauss type photographic lens system comprises, in the order from the object side, a first lens component which is a positive meniscus lens having its convex surface facing the object side, a second lens component which is a positive meniscus lens having its convex surface facing the object side, a third lens component which is a negative meniscus lens having its convex surface facing the object side, a fourth lens component which is a negative meniscus lens having its concave surface facing the object side, a fifth lens component which is a positive meniscus lens cemented to the fourth lens component and havings its convex surface facing the image side, and a sixth lens component which is a biconvex lens having its more curved surface facing the image side, the lens system satisfying certain conditions peculiar to the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.