Optical scanning system
US9547171B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2015 |
| Grant date | Jan 17, 2017 |
| Priority date | — |
| Expiry date | Oct 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/124
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanning system includes a variable-focus element, an imaging lens and a deflector, wherein the reciprocal of the focal length f of the variable-focus element is changed from 1/fMIN to 1/fMAX, and for the case that the equation1/f={(1/fMAX)+(1/fMIN)}/2holds, a beam which has passed through the variable-focus element is a divergent beam, andis satisfied, where x1 represents a distance from a virtual image point of the divergent beam to the principal point on the entry side of the variable-focus element, x2 represents a distance from the principal point on the exit side of the variable-focus element to the principal point on the entry side of the imaging lens, and x3 represents a distance from the principal point on the exit side of the imaging lens to an image point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.