Image exposure apparatus
US5940663A · kind A · utility
3Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1995 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Dec 19, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An error between a set value of magnification and an actual value of magnification is reduced by correcting the amounts of movement of a single-focus lens unit and a mirror in accordance with a production error in the focal length (in accordance with the lot number) of the single-focus lens unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.