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2007•Infrared and Laser EngineeringRequires access

Optical design of diffractive telescope

Fengyou Li

Open publisher page 2 citations

Abstract

The current requirements on space telescope are wide spectral coverage,high resolution,light weight,and the diffractive telescope can satisfy these requirements.With the help of flat diffractive lens,lighter weight,lower cost system is obtained based on Schupmann′s achromatic theory,and such a system that has wide spectral coverage is designed.A design example of diffractive telescope is presented and the aperture of objective lens is 1 000 mm,f/#=100,off-axis three mirrors are used as eyepiece.It is shown that the system is achromatic and approximately attains diffraction limit at 0.65-0.75 μm,over the view field of 0.02°×0.035°.

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What this paper is about

The current requirements on space telescope are wide spectral coverage,high resolution,light weight,and the diffractive telescope can satisfy these requirements.With the help of flat diffractive lens,lighter weight,lower cost system is obtained based on Schupmann′s achromatic theory,and such a system that has wide spectral coverage is designed.A design example of diffractive telescope is presented and the aperture of objective lens is 1 000 mm,f/#=100,off-axis three mirrors are used as eyepiece.It is shown that the system is achromatic and approximately attains diffraction limit at 0.65-0.75 μm,over the view field of 0.02°×0.035°.

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Available abstract

The current requirements on space telescope are wide spectral coverage,high resolution,light weight,and the diffractive telescope can satisfy these requirements.With the help of flat diffractive lens,lighter weight,lower cost system is obtained based on Schupmann′s achromatic theory,and such a system that has wide spectral coverage is designed.A design example of diffractive telescope is presented and the aperture of objective lens is 1 000 mm,f/#=100,off-axis three mirrors are used as eyepiece.It is shown that the system is achromatic and approximately attains diffraction limit at 0.65-0.75 μm,over the view field of 0.02°×0.035°.

Key concepts: Achromatic lens, Eyepiece, Telescope, Optics, Aperture (computer memory), Physics, Lens (geology), Diffraction

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