Optical design for laser Doppler angular encoder with sub-nanoradian sensitivity

Conference · Mon Sep 01 00:00:00 EDT 1997

OSTI ID:634124

Shu, D; Alp, E E; Barraza, J; Kuzay, T M; Mooney, T

A novel laser angular encoder system has been developed based on the principles of radar, the Doppler effect, optical heterodyning, and self aligning multiple reflection optics. Using this novel three dimensional multiple reflection optical path, a 10 to 20 times better resolution has been reached compared to commercially available laser Doppler displacement meters or laser interferometer systems. With the new angular encoder, sub-nanoradian resolution has been attained in the 8 degree measuring range in a compact setup about 60 mm (H) x 150 mm (W) x 370 mm (L) in size for high energy resolution applications at the Advanced Photon Source undulator beamline 3-ID.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 634124
• Report Number(s): ANL/XFD/CP-92961; CONF-970889-; ON: DE97054393; TRN: 98:009822
• Resource Relation: Conference: SRI `97: 6. international conference on synchrotron radiation instrumentation, Himeji (Japan), 4-8 Aug 1997; Other Information: PBD: Sep 1997
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ADVANCED PHOTON SOURCE
ACCELERATOR FACILITIES
CLOSED-LOOP CONTROL
MONOCHROMATORS
FEEDBACK
LASERS