&lt;title&gt;Radial shearing interferometer for in-process measurement of diamond turning&lt;/title&gt;

Kohno, Tsuguo; Matsumoto, Daishi; Yazawa, Takanori; Uda, Yutaka

doi:10.1117/12.294519

Cited by 11 publications

(5 citation statements)

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“…Figures 7(b) and 7(c) show the slope, the average diameter is 0.2 mm. In Figure 8, we show a thin film to test lenses and spherical surfaces (38)(39)(40)(41)(42)(43)(44)(45)(46)(47). In Figure 10, representative frame of the temporal variation of the slope calculated for this case is displayed, in the Video 3, can observe the phase variations induced by the evaporation of alcohol.…”

Section: Synthetic Structuresmentioning

confidence: 98%

4D measurements of biological and synthetic structures using a dynamic interferometer

Toto-Arellano

2017

Journal of Modern Optics

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Considering the deficiency of time elapsed for phase-stepping interferometric techniques and the need of developing non-contact and on-line measurement with high accuracy, a single-shot phase-shifting triple-interferometer (PSTI) is developed for analysis of characteristics of transparent structures and optical path difference (OPD) measurements. In the proposed PSTI, coupled three interferometers which generate four interference patterns, and a polarizer array is used as phase shifters to produce four spatially separated interferograms with π/2-phase shifts, which are recorded in a single capture by a camera. The configuration of the PSTI allows dynamic measurements (4D measurements) and does not require vibration isolation. We have applied the developed system to examine the size and OPD of cells, and the slope of thin films

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Section: Synthetic Structuresmentioning

confidence: 98%

4D measurements of biological and synthetic structures using a dynamic interferometer

Toto-Arellano

2017

Journal of Modern Optics

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“…First, by means of Fourier transform (FT) method [6,7], the phase difference(PHD)in the common area of the contracted and expanded wavefront are determined directly from the CRS fringe pattern. Then, according to the PHD data, the tested wavefront can be reconstructed precisely using the iterative algorithm [8,9,10].…”

Section: Wavefront Reconstruction Algorithmmentioning

confidence: 99%

Measuring the wavefront distortion of a phased-array laser radar by using a real-time optoelectronic measurement system

Zheng

2009

SPIE Proceedings

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A real-time optoelectronic measurement system is proposed to measure the wavefront distortions of scanning beams of a phased-array laser radar. This measurement system includes electric control rotating and translating platforms and a cyclic radial shearing interferometer(CRSI). CRSI is an effective interferometry to mesure the laser wavefront. A inversion algorithm is used to precisely reconstruct wavefront phase distribution from interferograms generated by the CRSI. An actual experiment of laser wavefront distortion measurement is implemented successfully. The experimental results show that this optoelectromic measurement system can measure laser wavefront distortion of a phased-array laser radar in accuracy and in real time.

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“…The iterative reduction calculation [3] only suits to single optical path radial sheering interferometer. For double optical path radial sheering interferometer, appropriate algorithm is discussed as follows.…”

Section: Principle Of Reconstructing the Original Wave Surfacementioning

confidence: 99%

Interference technique for laser wavefront measurement

2002

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The radial sheering interference technique is used to measure the laser wave-front. In the system, the near field and far field wave-front of the laser beam of large caliber are measured respectively. Many evaluation parameters of the laser wave-front can be obtained, such as scattering angle, M2 of the laser beam, peak-to-peak-value (PPV), strehl value et. al. The interferogram is acquired by CCD camera, pretreated by high-capability computer and then used to reconstruct the wave surface. Mathematical principle to reconstruct the wave-front is expatiated in the paper. The interference system can be adjusted easily and operate real-time during the experiment.

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<title>Radial shearing interferometer for in-process measurement of diamond turning</title>

Cited by 11 publications

References 0 publications

4D measurements of biological and synthetic structures using a dynamic interferometer

4D measurements of biological and synthetic structures using a dynamic interferometer

Measuring the wavefront distortion of a phased-array laser radar by using a real-time optoelectronic measurement system

Interference technique for laser wavefront measurement

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