Optimizing the shaping technology and test methods for convex aspheric surfaces of large optical items

Abdulkadyrov, Magomed A.; Belousov, Sergei; Pridnya, Vitaliy V.; Polyanchikov, Andrey V.; Semenov, A. P.

doi:10.1364/jot.80.000219

Cited by 3 publications

(1 citation statement)

References 7 publications

(4 reference statements)

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“…[5][6][7] This is a wide-angle terrestrial telescope with a primary hyperbolic mirror 4100 mm in diameter and a secondary mirror 1240 mm in diameter, intended for surveying the Southern Hemisphere of the sky simultaneously in the visible and IR regions. The telescope has an altazimuth mount, and the image is formed at the Cassegrain focus.…”

Section: Testing the Primary Mirror Of The Vista Telescopementioning

confidence: 99%

Interference methods of testing the surface figure of large aspheric items, based on lens-type and holographic wave-front correctors

Semenov¹,

Abdulkadyrov²,

Patrikeev³

et al. 2013

J. Opt. Technol.

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This paper discusses the features of methods of testing aspheric primary mirrors of telescopes with lens-based, mirror-lens-based, and holographic correctors. Methods are described for simultaneously testing the same surface of an optical item with different correctors to achieve and confirm the required parameters of the aspheric (vertex radius and conic constant). Results are given for testing the correctors with a holographic mirror simulator to verify the fabrication accuracy of the correctors themselves and, if necessary, of the wave-front correction of the lens correctors.

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Section: Testing the Primary Mirror Of The Vista Telescopementioning

confidence: 99%

Interference methods of testing the surface figure of large aspheric items, based on lens-type and holographic wave-front correctors

Semenov¹,

Abdulkadyrov²,

Patrikeev³

et al. 2013

J. Opt. Technol.

Self Cite

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show abstract

Modified surface testing method for large convex aspheric surfaces based on diffraction optics

et al. 2017

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Interference Method in Controlling the Convex Hyperbolic Surfaces using the Optical Diffraction Element

2022

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Interference control methods are making it possible to evaluate with high accuracy errors in the shape of the optical part surface profile. The interference pattern processing allows obtaining a map of the surface deviations at each of its points with an accuracy of half the wavelength. An interference method is proposed for testing the convex hyperbolic surfaces, which could be introduced to control mirrors with large aperture angles in the imaginary geometric focus. The proposed auto-collimation control scheme consists of a helium-neon laser with the wavelength of 632.8 nm, a meniscus lens and a planar axisymmetric diffractive optical element to correct the meniscus spherical aberration. Numerical method is presented for calculating the optical diffraction element using a phase profile on the example of the secondary hyperbolic mirror of the Millimetron space telescope. The developed scheme was simulated in the Zemax OpticStudio program. The approximation error of the calculated phase profile was evaluated depending on the number of phase coefficients. The Fizeau interferometer optical system is proposed to implement the developed method. The influence of errors in installing a controlled mirror on the interference pattern for axial displacement, transverse displacement and tilt was determined. The residual wave aberration was evaluated in the control system

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Optimizing the shaping technology and test methods for convex aspheric surfaces of large optical items

Cited by 3 publications

References 7 publications

Interference methods of testing the surface figure of large aspheric items, based on lens-type and holographic wave-front correctors

Interference methods of testing the surface figure of large aspheric items, based on lens-type and holographic wave-front correctors

Modified surface testing method for large convex aspheric surfaces based on diffraction optics

Interference Method in Controlling the Convex Hyperbolic Surfaces using the Optical Diffraction Element

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