Objective
US4002407A · kind A · utility
8Cited by
2References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1975 |
| Grant date | Jan 11, 1977 |
| Priority date | — |
| Expiry date | Dec 4, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B21/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light-weight objective which comprises a small number of lens components, i.e., a first positive lens component, a second positive lens component and a third positive cemented lens component and can be manufactured at low cost, and wherein aberrations are favorably corrected at a wavelength of 6328 A.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.