Abstract

The long trace profiler (LTP) is proposed to measure radius of curvature (R) and surface figure of a longradius spherical surface in an optical shop. Equipped with a motorized rotary stage and a two-dimensional tilt stage, the LTP scans the full aperture and calculates the absolute radius of curvature of each scanning line based on the least square method. Nonlinear error and manufacture error difference between center and the edge are obtained by comparing R results. The R-limit is validated and expressed as D/R, where D is the aperture of the mirror under test. A full-aperture three-dimensional figure is also reconstructed based on triangle interpolation.

© 2011 Chinese Optics Letters

Improvements in the accuracy and the repeatability of long trace profiler measurements

Peter Z. Takacs, Eugene L. Church, Cynthia J. Bresloff, and Lahsen Assoufid
Appl. Opt. 38(25) 5468-5479 (1999)

Precise measuring method for detecting the in situ distortion profile of a high-heat-load mirror for synchrotron radiation by use of a pentaprism long trace profiler

Shinan Qian, Werner Jark, Giovanni Sostero, Alessandro Gambitta, Fabio Mazzolini, and Adolfo Savoia
Appl. Opt. 36(16) 3769-3775 (1997)

Long-trace profiler with cyclic optical configuration

Sanjib Chatterjee and Y. Pawan Kumar
Appl. Opt. 41(28) 5857-5859 (2002)

GRIN lens profile measurement by ray trace analysis

Toyokazu Sakamoto
Appl. Opt. 22(19) 3064-3069 (1983)

Focus retrocollimated interferometry for long-radius-of-curvature measurement

Yang Xiang
Appl. Opt. 40(34) 6210-6214 (2001)