Compensator system and method for compensating angular dispersion
US9535309B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2012 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Aug 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a compensator system adapted to compensate for the angular dispersion of electromagnetic beams deflected by at least one acousto-optic deflector of an optical system, wherein the angular dispersion of each deflected beam is dependent on the deflection angle obtained by the deflecting acoustic frequency of the acousto-optic deflector, characterized in that the compensator system comprises: —a first lens group for spatially separating the deflected beams of different deflection angle and angular dispersion by focusing the beams substantially into the focal plane, —a compensator element having a first surface and a second surface, and being arranged such that the first surface of the compensator element lies substantially in the focal plane of the first lens group, and the first and second surfaces of the compensator element have nominal radiuses R1 and R2 that together work as prisms with tilt angles β and prism opening angles αp that vary with the distance from the optical axis so as to compensate for the angular dispersion of the spatially separated deflected beams, —a second lens group arranged so as to substantially parallelize the different wavelength co…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.