&lt;title&gt;Full Aperture Testing With Subaperture Test Optics&lt;/title&gt;

Thunen, J. G.; Kwon, Osuk Y.

doi:10.1117/12.933908

Cited by 44 publications

(20 citation statements)

References 4 publications

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“…It involves synthesizing a full-aperture phase map from multiple subaperture phase maps by combining an interferometer with motion capability and a stitching algorithm. The earliest stitching methods were able to determine only the loworder form of the surface by fitting polynomials to non-overlapping subapertures [3]. However, modern stitching algorithms are able to achieve high spatial resolutions as well by mathematically minimizing the mismatch within the overlapping subaperture areas.…”

Section: 2mentioning

confidence: 99%

New methods for calibrating systematic errors in interferometric measurements

et al. 2005

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Interferometers are often used to measure optical surfaces and systems. The accuracy of such measurements is often limited by the ability to calibrate systematic errors such as reference wave and image distortion. Standard techniques for calibrating reference wave include the two-sphere and randomball test. QED Technologies ® (QED) recently introduced a Subaperture Stitching Interferometer (SSI ® ) that has the integrated ability to perform reference wave calibration. By measuring an optical surface in multiple locations, the stitching algorithm has the ability to compensate for reference wave and imaging distortion. Each of the three reference wave calibration methods has its own limitations that ultimately affect the accuracy of the measurement. The merits of each technique for reference wave calibration are reviewed and analyzed. By using the SSI-computed estimate and the random-ball test in tandem, a composite method for calibrating reference wave error is shown to combine the benefits of both individual techniques. The stitching process also calibrates for distortion, and plots are shown for different transmission optics. Measurements with and without distortion compensation are shown, and the residual difference is compared to theoretical predictions.

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Section: 2mentioning

confidence: 99%

New methods for calibrating systematic errors in interferometric measurements

et al. 2005

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“…Subaperture stitching technology allows division of the wavefront into smaller pieces whose fringes can be individually resolved [2][3][4][5][6]. Such capability was introduced in 2006, enabling the testing of mild aspheres (up to 100 waves departure from best-fit sphere) without null-correcting optics [7].…”

Section: Introductionmentioning

confidence: 98%

Subaperture stitching interferometry of high-departure aspheres by incorporating a variable optical null

et al. 2010

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“…To overcome these limitations, a novel conception of subaperture test has been proposed and further developed. [3][4][5][6] However, its crucial shortcoming is the uncertainty of the relative piston and tilt among all individual subapertures, which decrease the accuracy and becomes a main impediment to its practical applications. By introducing an overlapping area in each couple of adjacent subapertures, this problem can be solved by MAOST.…”

Section: Introductionmentioning

confidence: 99%

Recent developments of multi-aperture overlap-scanning technique

Chen

Guo

et al. 2004

SPIE Proceedings

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In this paper, the multi-aperture overlap-scanning technique (MAOST) and its recent developments are presented. In the first instance, MAOST is used in interferometry, and the principle of MAOST for interferometry is that, a tested largescale plane is covered by an array of interferometric subapertures, and the relationship between each couple of adjacent subapertures is determined from their overlapping areas by a least squares method, and then the profile of tested plane is obtained by connecting all the subapertures together. Recently, to meet the requirements of advanced manufacturing, the idea of MAOST has been extended to precision three-dimensional (3-D) measurement. In practice, a whole-body 3-D shape is acquired by two steps: first measuring the 3-D shape from different views and afterwards connecting all the views together. In order to accurately determine the position and orientation of every single-view in a common coordinate system, an iterative algorithm based on MAOST concept is utilized.

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<title>Full Aperture Testing With Subaperture Test Optics</title>

Cited by 44 publications

References 4 publications

New methods for calibrating systematic errors in interferometric measurements

New methods for calibrating systematic errors in interferometric measurements

Subaperture stitching interferometry of high-departure aspheres by incorporating a variable optical null

Recent developments of multi-aperture overlap-scanning technique

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