The penta-prism LTP: A long-trace-profiler with stationary optical head and moving penta prism

Journal Article · Wed Mar 01 04:00:00 EST 1995 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1145658· OSTI ID:6558615

Qian, S; Jark, W ^[1]; Takacs, P Z ^[2]

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1. Sincrotrone Trieste, Padriciano 99, 34012 Trieste (Italy)
2. Brookhaven National Laboratory, Upton, New York 11973 (United States)

Metrology requirements for optical components for third-generation synchrotron sources are taxing the state of the art in manufacturing technology. We have investigated a number of error sources in a commercial figure measurement instrument, the Long-Trace-Profiler II, and have demonstrated that, with some simple modifications, we can significantly reduce the effect of error sources and improve the accuracy and reliability of the measurement. By keeping the optical head stationary and moving a penta prism along the translation stage, as in the original pencil-beam interferometer design of von Bieren, the stability of the optical system is greatly improved, and the remaining error signals can be corrected by a simple reference beam subtraction. We illustrate the performance of the modified system by investigating the distortion produced by gravity on a typical synchrotron mirror and demonstrate the repeatability of the instrument despite relaxed tolerances on the translation stage.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6558615
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 66:3; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

440600* -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ERRORS
INTERFEROMETERS
MEASURING INSTRUMENTS
MIRRORS
RADIATION SOURCES
SYNCHROTRON RADIATION SOURCES