Recording the parallelism of optically contacted Fabry-Perots

Meaburn, J.; Anderson, Frank A.; Harrington, R. F.; Mortleman, J.; Peters, A.

doi:10.1364/ao.15.003006

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…Our test is effective over the full range of TTF spacings down to 2 mm. Alternative techniques for measuring parallelism, such as beam partitioning by insect-eye lenses (Meaburn et al 1976), were explored and found impracticable for an astronomical imager such as TTF. A novel CCD charge-shuffling technique is employed that involves multiply exposing a single CCD image during the test.…”

Section: Introductionmentioning

confidence: 99%

Parallelism of a Fabry‐Perot Cavity at Micron Spacings

Jones¹,

Bland‐Hawthorn²

1998

PUBL ASTRON SOC PAC

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We describe a method to quantify the degree of parallelism between two transparent glass mirrors spaced a few microns apart. Our technique, which permits the measurement and correction of deviations as small as l/10000 from parallelism, is fundamental to the successful operation of tunable narrowband interference filters for two reasons. First, the highest throughput is achieved when the plates are parallel at any plate spacing. Second, the lowest resolution (largest bandpass) imaging is achieved when the plates are only a few microns apart, but there is a real danger of the plates touching if parallelism is not maintained. The Taurus Tunable Filter (TTF) 3 is a Fabry-Perot cavity with an adjustable plate spacing of 2-13 mm. The parallelism measurement involves repeated imaging through a focal-plane slit and a series of pupil-plane masks. This approach is particularly efficient when the plate scanning is synchronized with the movement of the charge on the CCD. We assess the effects of wavelength-dependent phase changes within the inner surface coatings of the plates. These become important as the plates approach a spacing comparable in size to the thickness of the coatings.

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Section: Introductionmentioning

confidence: 99%

Parallelism of a Fabry‐Perot Cavity at Micron Spacings

Jones¹,

Bland‐Hawthorn²

1998

PUBL ASTRON SOC PAC

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Low-coherence phase-shifting shearing interferometer for measuring parallelism of parallel surfaces of transparent samples

Lin

Yeh

Trinh

2020

Optics & Laser Technology

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Parallelism maps for optically contacted etalons

1981

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A measurement technique is described that is capable of producing accurate numerical maps of the parallelism defect of optically contacted Fabry-Perot etalons. A photoelectric raster scan of the etalon transmission intensity distribution is performed at each of three closely spaced etalon tunings, one at maximum on-axis and two at the half-maxima on-axis positions. Simple data manipulation gives numerical or contour maps of the parallelism defect. Results demonstrating the effect of mechanical constraints on etalon parallelism are presented.

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Recording the parallelism of optically contacted Fabry-Perots

Cited by 4 publications

References 5 publications

Parallelism of a Fabry‐Perot Cavity at Micron Spacings

Parallelism of a Fabry‐Perot Cavity at Micron Spacings

Low-coherence phase-shifting shearing interferometer for measuring parallelism of parallel surfaces of transparent samples

Parallelism maps for optically contacted etalons

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