Phase conjugate Twyman-Green interferometer for testing spherical surfaces and lenses and for measuring refractive indices of liquids or solid transparent materials

Shukla, R. P.; Dokhanian, Mostafa; Venkateswarlu, Putcha; George, M. C.

doi:10.1016/0030-4018(90)90338-t

Cited by 9 publications

(2 citation statements)

References 21 publications

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“…Conventional interferometers such as the Fizeau and Twyman-Green interferometers have been widely used for precision surface testing [4][5]. There are many ways studied on the measurement of surface deviation [6], as knife-edge test [7] and other interference apparatus [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

New system of miniaturization online testing of spherical interferometer

et al. 2011

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With the aim to measure the radius of curvature deviation and the surface form deviation of optical elements online in the workshop, based on laser testing technique, two solutions of miniaturization without precision guider sphericity interferometer systems are described, and the principle of systems are analyzed. Compared with the traditional sphericity interferometer, the systems designed are particularly suitable for testing mirror noncontact online in workshop, advantaged in compact structure, no precision guider, high efficiency and low costs. The interferometer systems use the different radius of curvature of existing spherical test plates in the production workshop to produce reference wavefront. The systems can not only get the astigmatism and local deviation of lens, but also can reflect the radius of curvature deviation, which provides rapid and nondestructive noncontact online testing.

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Section: Introductionmentioning

confidence: 99%

New system of miniaturization online testing of spherical interferometer

et al. 2011

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“…5 The PCM was also used for removing the aberrations of a diverging beam of light introduced by a beam splitter, and a compensating plate to eliminate the aberrations was not required. 6,7 Another important application of the distortioncompensation property of a PCM lies in reducing the speckles in the light reflected diffusely by a rough surface to yield interference signals with high signalto-noise ratio. 8 -10 The spatial phase distribution of a wave incident upon a self-pumped phase-conjugate mirror ͑SPPCM͒ is reversed in sign by the SPPCM to generate a self-pumped phase-conjugate wave ͑SPPCW͒.…”

Section: Introductionmentioning

confidence: 99%

Measurement of small vibration amplitudes of a rough surface by an interferometer with a self-pumped phase-conjugate mirror

Wang¹,

Sasaki²,

Suzuki³

et al. 2000

Appl. Opt.

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The application of a Michelson interferometer with a self-pumped phase-conjugate mirror to measure small vibration amplitudes of a rough surface is described. The distorted wave front of the light that is diffusely reflected from the rough surface is restored by phase conjugation to provide an interference signal with a high signal-to-noise ratio. The vibration amplitudes of a stainless-steel sample are measured with a precision of approximately 5 nm.

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