Pixelated Phase-Mask Dynamic Interferometers

Millerd, James E.; Brock, Neal; Hayes, John; North-Morris, Michael; Kimbrough, Brad; Wyant, James C.

doi:10.1007/3-540-29303-5_86

Cited by 25 publications

(15 citation statements)

References 3 publications

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“…Figures 2(a)-(e) verify that phase shifting is generated with the rotation of the analyzer [12,13] . These results indicate that phase-shifting interferograms can be achieved when the polarization Fizeau interferometer is combined with the polarization phase shifter.…”

mentioning

confidence: 75%

Polarization Fizeau interferometer based on birefringent thin film

Zhu¹,

Zeng²,

Li³

et al. 2012

中国光学快报

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A polarization Fizeau interferometer based on birefringent thin film is presented. The interferometer adopts a birefringent thin film to obtain orthogonally polarized and strictly common-path reference and test beams. Advantages include ease of implementation on large-aperture interferometer, measuring test optics from long distance, and achieving high fringe visibility. The phase shift is obtained by combining a quarterwave plate and an analyzer. The concepts illustrated are verified experimentally.

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mentioning

confidence: 75%

Polarization Fizeau interferometer based on birefringent thin film

Zhu¹,

Zeng²,

Li³

et al. 2012

中国光学快报

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“…An additional concern with the use of the circular-9 algorithm relates to the issue of camera smear. 18 When using a sensor with 50% smear, the stacked algorithm outperforms the circular algorithm for low values of tilt. However, since the circular algorithm's performance is so much better than that of the stacked algorithm, it is better to simply eliminate the smear through shuttering the laser than to use the lower performing algorithm.…”

Section: Pixelated Spatial Carriermentioning

confidence: 99%

“…The results of Eqs. (18) and (19) apply to all the N-point averaging algorithms and result from the symmetrical nature of the weighting factors. Therefore the third term in Eq.…”

Section: General Error Formula Derivationmentioning

confidence: 99%

Pixelated mask spatial carrier phase shifting interferometry algorithms and associated errors

Kimbrough

2006

Appl. Opt.

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In both temporal and spatial carrier phase shifting interferometry, the primary source of phase calculation error results from an error in the relative phase shift between sample points. In spatial carrier phase shifting interferometry, this phase shifting error is caused directly by the wavefront under test and is unavoidable. In order to minimize the phase shifting error, a pixelated spatial carrier phase shifting technique has been developed by 4D technologies. This new technique allows for the grouping of phase shifted pixels together around a single point in two dimensions, minimizing the phase shift change due to the spatial variation in the test wavefront. A formula for the phase calculation error in spatial carrier phase shifting interferometry is derived. The error associated with the use of linear N-point averaging algorithms is presented and compared with those of the pixelated spatial carrier technique.

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“…Temporal phase-shifting usually involves significant hardware synchronization and incurs problems due to drift and motion [2]. Several single-shot methods have been developed, such as dynamic phase-shifting [3]. However, the phase result in these cases must still be unwrapped.…”

Section: Introductionmentioning

confidence: 99%