Interferometric Optical Test And Diffraction Based Image Analysis

Korhonen, T.; Haarala, S.; Piironen, J.; Silianpaa, A. K.

doi:10.1117/12.963569

Cited by 4 publications

(1 citation statement)

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“…It has been more than 15 years since Korhonen described the development and use of an interferometric modification to the classical Hartmann optical test. [1][2][3][4] In this device, which should perhaps be called the Korhonen-Hartmann wave-front sensor, a Hartmann aperture array and a single converging camera lens replace the familiar lenslet array of the Shack-Hartmann. In regions away from the camera lens focus, an array of Young's-type interference spots are formed by the overlapping Hartmann aperture beams.…”

Section: Introductionmentioning

confidence: 99%

Interferometric Hartmann wave-front sensing for active optics at the 65-m conversion of the Multiple Mirror Telescope

West¹

2002

Appl. Opt.

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A little-used interferometric modification to the classical Hartmann optical test is being used for active optics corrections at the 6.5-m Multiple Mirror Telescope (MMT) Observatory. The technique produces compact interference spots whose positions depend on discrete wave-front phase-difference errors. A diffraction model illustrates the formation of interference spots. The limitations on wave-front sampling that are due to atmospheric seeing are estimated. Two data reduction matrix strategies are given. A single correction of collimation and primary mirror figure produces a nearly diffraction-limited telescope image. Wave-front polynomial coefficients ranging from several nanometers to several micrometers in amplitude are reliably detected.

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Section: Introductionmentioning

confidence: 99%