Telecentric and achromatic f-theta scan lens system and method of use
US5404247A · kind A · utility
30Cited by
10References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1993 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Aug 2, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An airspaced, diffraction limited, seven element telecentric f-theta lens having a first meniscus lens concave to the incident side; a first bi-concave lens; a second meniscus lens convex to the incident side; a third meniscus lens concave to the incident side; a pair of bi-convex lenses; and a second bi-concave lens is disclosed. The second, third and fourth as well as the sixth and seventh lens elements are edge contact spaced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.