Design and optimization technique for three-mirror telescopes

Korsch, Dietrich

doi:10.1364/ao.19.003640

Cited by 35 publications

(15 citation statements)

References 2 publications

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“…• mirror placed at the pupil plane (Korsch 1980) concerning its aberration-free optical performance. However, the magnification factor by the third mirror, M, should be large in order to make the vignetting factor small for the Korsch system, whereas the magnification factor by the third mirror should be close to unity in the present system.…”

Section: Resultsmentioning

confidence: 99%

“…Rakich and Rumsey (2002) as well as Rakich (2002) found solutions for a flatfield three-mirror telescope with only one mirror aspherized. However, many of the three-mirror telescope designs suffer from obscurations, except for the design reported by Korsch (1980) for practical applications. A four-mirror telescope with spherical primary is another approach to achieve small obstruction (Meinel et al 1984;Wilson et al 1994;Rakich, Rumsey 2004).…”

Section: Introductionmentioning

confidence: 99%

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Three-Mirror Anastigmat Telescope with an Unvignetted Flat Focal Plane

Nariai¹,

Iye²

2005

Publications of the Astronomical Society of Japan

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A new optical design concept of telescopes to provide an aberration-free, wide field, unvignetted flat focal plane is described. The system employs three aspheric mirrors to remove aberrations, and provides a semi-circular field of view with minimum vignetting. The third mirror reimages the intermediate image made by the first two-mirror system with a magnification factor on the order of unity. The present system contrasts with the Korsch system where the magnification factor of the third mirror is usually much larger than unity. Two separate optical trains can be deployed to cover the entire circular field, if necessary.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three-Mirror Anastigmat Telescope with an Unvignetted Flat Focal Plane

Nariai¹,

Iye²

2005

Publications of the Astronomical Society of Japan

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“…The initial structure of the three-mirror optical system is attained by the mathematical derivation which has been presented in a variety of contexts [10][11][12]. Here, we focus on the optimization procedure of the integrated system.…”

Section: Optical System Designmentioning

confidence: 99%

A Coaxial and Off-axial Integrated Three-mirror Optical System with High Resolution and Large Field of View

Chen

Zhu

Peng

et al. 2016

Journal of the Optical Society of Korea

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A novel optical design for high resolution, large field of view (FOV) and multispectral remote sensing is presented. An f/7.3 Korsch and two f/17.9 Cook three-mirror optical systems are integrated by sharing the primary and secondary mirrors, bias of the FOV, decentering of the apertures and reasonable structure arrangement. The aperture stop of the Korsch system is located on the primary mirror, while those of the Cook systems are on the exit pupils. High resolution image with spectral coverage from visible to near-infrared (NIR) can be acquired through the Korsch system with a focal length of 14 m, while wide-field imaging is accomplished by the two Cook systems whose focal lengths are both 13.24 m. The full FOV is 4°×0.13°, a coverage width of 34.9 km at the altitude of 500 km can then be acquired by push-broom imaging. To facilitate controlling the stray light, the intermediate images and the real exit pupils are spatially available. After optimization, a near diffraction-limited performance and a compact optical package are achieved. The sharing of the on-axis primary and secondary mirrors reduces the cost of fabrication, test, and manufacture effectively. Besides, the two tertiary mirrors of the Cook systems possess the same parameters, further cutting down the cost.

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“…Proceeding from a general investigation of the thirdorder aberrations of an axially-symmetric three-mirror system, Dietrich Korsch (Korsch 1972(Korsch , 1977(Korsch , 1980 derived formulae that give a whole set of parameters for such telescope, corrected for spherical aberration, coma, astigmatism, and field curvature (see also Wyman & Korsch 1974a,b). Thus, he has come to a family of systems, anastigmatic in third order of aberrations (Korsch 1991).…”

Section: Korsch Three-mirror Anastigmatmentioning

confidence: 99%