Journal ArticleDOI
Measurement of residual wedge angle with a reversal shear interferometer
Sanjib Chatterjee,Y. Pawan Kumar +1 more
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TLDR
In this paper, a technique for determination of residual wedge angle of high optical quality transparent parallel plate using a reversal shear interferometer-based optical system has been discussed, in which the parallel plate to be tested is used to introduce angular tilt in the preset two-beam interference fringes of a reversal Shear Interferometer.Abstract:
A technique for determination of residual wedge angle of high optical quality transparent parallel plate using a reversal shear interferometer-based optical system has been discussed. In this technique the parallel plate to be tested is used to introduce angular tilt in the preset two-beam interference fringes of a reversal shear interferometer. The parallelism is calculated from the angular tilt of the fringes. The technique is more sensitive compared to techniques using Fizeau interferometer and is most suitable for highly parallel transparent plate with very low residual wedge angle.read more
Citations
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Journal ArticleDOI
Measurement of wedge angle of a transparent parallel plate using quasi-monochromatic light source and phase shifting interferometry
Sanjib Chatterjee,Y. Pavan Kumar +1 more
TL;DR: In this paper, a quasi-monochromatic light source was used for the measurement of residual wedge angle (RWA) of transparent nearly parallel plate (PP) using phase shifting interferometry (PSI).
Journal ArticleDOI
Improvement of accuracy of interferometric measurement of wedge angle of plates
A. I. But,A. M. Lyalikov +1 more
TL;DR: In this article, a method for improving the accuracy of measuring the wedge angle of transparent plates using a lateral-shear holographic interferometer is proposed, where successive processing of a pair of interferograms with doubled number of interference fringes leads to reduction of the observational error by a factor of two compared to traditional interferometric methods.
Journal ArticleDOI
Innovative measurement of parallelism for parallel transparent plate based on optical scanning holography by using a random-phase pupil
TL;DR: A potential method is proposed to measure the parallelism of parallel transparent plate with an advanced lower limit and a convenient process by optical scanning holography (OSH) using a random-phase pupil, which is largely distinct from traditional methods.
Journal ArticleDOI
Highly sensitive interferometric testing of deviation of the wedge angle of transparent plates
TL;DR: In this article, the authors used nonlinear recording of holograms of the reference and tested plates on different carriers and creating interference patterns that map the deviation of the angle, using higher orders of light diffraction on the holograms, with improved sensitivity.
Journal ArticleDOI
Improvement of the sensitivity of measurements in the formation of holographic interferograms of wedge plates
A. I. But,A. M. Lyalikov +1 more
TL;DR: In this paper, a method for improving the sensitivity of measurements in the formation of aberration-free interference images of wedge plates, which do not require a priori knowledge of the position of the wedge edge, was proposed.
References
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BookDOI
Optical Shop Testing
TL;DR: In this paper, a completely rewritten chapter was added to cover wavefront fitting and evaluation as well as holographic and Moire methods, and an appendix was added suggesting appropriate tests for typical optical surfaces.
Book
Fabrication Methods for Precision Optics
TL;DR: This chapter discusses Optical Shop Testing-Methods and Instruments, which aims to improve the quality and efficiency of optical shop testing in the developing world.
Journal ArticleDOI
Simultaneous measurement of surface shape and variation in optical thickness of a transparent parallel plate in wavelength-scanning Fizeau interferometer
TL;DR: Two 19-sample algorithms that suppress multiple-interference noise up to the second order of the reflectance of the test plate are presented and Experimental results show that the variation in surface shape and optical thickness of a glass parallel plate of 250-mm diameter was measured with a resolution of 1-2 nm rms.
Journal ArticleDOI
Interference between wavefronts rotated or reversed with respect to each other and its relation to spatial coherence
TL;DR: In this paper, the conditions under which fringes of equal thickness could be obtained were explored, related to the spatial coherence of the collimated beam incident on the beam splitter.