Adjustable focus technique and apparatus using a moveable weak lens
US5257279A · kind A · utility
21Cited by
10References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1992 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Jun 4, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An assembly for use in a laser instrument which produces a plane of laser light by reflection from a cone. The assembly includes a weak focusing lens which improves the control over the planarity of the plane of light produced. Because it is weak, the weak focusing lens can be positioned over a relatively large distance to produce slight changes in the focus of the beam which is reflected to produce the plane of light. Critical, time consuming, and expensive manufacturing requirements can be relaxed, while improved performance results in superior laser instruments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.