Journal ArticleDOI
Long-trace profiler with cyclic optical configuration
Sanjib Chatterjee,Y. Pawan Kumar +1 more
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TLDR
The results of the development of a much simpler optical configuration for the long-trace profiler (LTP) are presented, which employs a cyclic optical configuration to achieve zero optical path difference for the closely spaced, laterally separated laser beams.Abstract:
The results of the development of a much simpler optical configuration for the long-trace profiler (LTP) are presented. The current technique employs a cyclic optical configuration to achieve zero optical path difference for the closely spaced, laterally separated laser beams. The accuracy of measurement is found to remain as good as that in the case of the widely used LTP, although the geometrical alignment problem is simplified significantly.read more
Citations
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Determining surface profile from sequential interference patterns from a long trace profiler
TL;DR: In this paper, a mathematical model of the interference pattern and methods of extracting the slope and height profile from such patterns were presented, and the Long Trace Profiler (Takacs et al., 2003) was used for slope measurement.
Journal ArticleDOI
Determination of the tangential surface profile of Toroidal beam line mirrors with polarization phase-shifting Twyman–Green interferometer
Sanjib Chatterjee,Y. Pavan Kumar +1 more
TL;DR: In this article, the tangential surface profile of Toroidal mirrors (TMs) used in synchrotron radiation beam lines is measured by adjusting a line focus on the surface of the TM, along the central tangential section.
Journal ArticleDOI
Simple technique for the accurate internal measurement of a right angle with a polarization phase-shifting, lateral-shearing, cyclic path optical configuration
Sanjib Chatterjee,Y. Pavan Kumar +1 more
TL;DR: In this article, a simple self-referenced technique for the internal measurement of a right angle is presented, where a polarization cyclic path optical configuration (CPOC) is used to superpose the mutually inclined plane wave components by duplicating the input pair of plane wave fronts and introducing appropriate lateral shear between the identical pairs.
Proceedings ArticleDOI
Edge enhancement of phase objects using a cyclic-path polarization interferometer
TL;DR: In this paper, a self compensating interferometer was employed with a polarizing beam splitter where two counter propagating orthogonally polarized mutually coherent beams were modulated by the phase shifts introduced by a phase sample.
References
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Proceedings ArticleDOI
Design Of A Long Trace Surface Profiler
TL;DR: In this paper, a long trace surface profiler for the non-contact measurement of surface profile, slope error and curvature on cylindrical synchrotron radiation (SR) mirror is pre-sented.
Journal ArticleDOI
The penta‐prism LTP: A long‐trace‐profiler with stationary optical head and moving penta prism (abstract)a)
TL;DR: In this paper, the authors investigated a number of error sources in a commercial figure measurement instrument, the Long Trace-Profiler II, and demonstrated that, with some simple modifications, they can significantly reduce the effect of errors and improve the accuracy and reliability of the measurement.
Proceedings ArticleDOI
Long Trace Profile Measurements On Cylindrical Aspheres
TL;DR: A long-trace optical profiling instrument is now in operation at Brookhaven National Laboratory measuring surface figure and macro-roughness on large optical components, principally long cylindrical mirrors for use in synchrotron radiation beam lines as discussed by the authors.
Journal ArticleDOI
Improvements in the accuracy and the repeatability of long trace profiler measurements.
TL;DR: Modifications of the long trace profiler at the Advanced Photon Source at Argonne National Laboratory have significantly improved its accuracy and repeatability for measuring the figure of large flat and long-radius mirrors.