Systems and methods for scanning a beam of light across a specimen
US6775051B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2002 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Jan 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/33
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods for scanning a beam of light over a specimen are provided. A system may include a pre-scan acousto-optical deflector (AOD) configured to deflect a beam of light, a second AOD configured as a traveling lens to focus the scanning beam, a relay lens, and an objective lens. The relay lens may be centered on the scan line produced by the second AOD, while the objective lens may be substantially de-centered with respect to the relay lens to produce a telecentric scanning spot with no field tilt. The system may modulate the amplitude of the sound wave in the first AOD to compensate for attenuation in the second AOD. The system may pre-fill one chirp packet in the second AOD while another chirp packet is scanning to substantially reduce a delay between consecutive scans.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.