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Instrumentation, Measurement, and Metrology

Measurement of centering error of a lens with cyclic optical configuration

[+] Author Affiliations
Sanjib Chatterjee

Raja Ramanna Centre for Advanced Technology, Department of Atomic Energy, Indore 452013, India

Y. Pavan Kumar

Raja Ramanna Centre for Advanced Technology, Department of Atomic Energy, Indore 452013, India

Opt. Eng. 49(4), 043601 (April 15, 2010). doi:10.1117/1.3386512
History: Received November 25, 2009; Revised February 22, 2010; Accepted February 23, 2010; Published April 15, 2010; Online April 15, 2010
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A new technique for the measurement of centering error (CE) of a lens using a cyclic path optical configuration (CPOC) is presented. The test lens (TL) is placed in the CPOC, adjusted for zero lateral shear. The mechanical axis (MA) of the TL holder is prealigned along the direction of the central ray (CR) of the counterpropagating collimated beams of the CPOC. A pencil beam is also set along the CR outside the CPOC. If the TL is free from CE, then its optical axis (OA) would coincide with the MA and the CR. The focal points F1 and F2, formed by the TL, and the center of the Haidinger-type fringes, due to interference of the light from F1 and F2 (which is along the line joining F1 and F2), would also lie on the CR. In the presence of CE, F1 and F2 would be laterally displaced from the CR and the fringe center (FC) suffers a deviation from the CR. Adjustments in the angular and lateral positions of the TL necessary to align the OA along the CR, as can be ensured from the coincidence of the FC with the CR, give a measure of the CE.

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© 2010 Society of Photo-Optical Instrumentation Engineers

Topics

Lenses

Citation

Sanjib Chatterjee and Y. Pavan Kumar
"Measurement of centering error of a lens with cyclic optical configuration", Opt. Eng. 49(4), 043601 (April 15, 2010). ; http://dx.doi.org/10.1117/1.3386512


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