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Proceedings Paper

Design of a continual zoom system with high speed for hyperspectral imagers
Author(s): Qiang Lu; Yiqun Ji; Weimin Shen
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Paper Abstract

A continual zoom system with high speed and visible wavelength range is designed. The lens has the advantages of high etendue and telecentricity in image space. It can be used properly as the fore objective of imaging spectrometers with high resolution since its image size doesn't change with the defocus of detector plane and its illumination in the plane is rather uniform. According to the characteristics and performance of the optical system of our hyperspectral imager, the structural selection and the initial parameter calculation are introduced in detail. The designed optical system with mechanical compensation is presented. The zoom ratio of the lens is 4 and the relative aperture 1:2. Its effective focal length is 55mm at short focus end and 220mm at long focus end. Its field angle is from 2 degrees to 8 degrees. Its distortion is lower than 0.6 per cent. The MTF value at the spatial frequency of 35lp/mm is higher than 0.77. The evaluation of its image quality shows that the designed zoom system can meet the requirements of our hyperspectral imager as its fore objective.

Paper Details

Date Published: 25 November 2009
PDF: 9 pages
Proc. SPIE 7506, 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 75060B (25 November 2009); doi: 10.1117/12.838166
Show Author Affiliations
Qiang Lu, Soochow Univ. (China)
Yiqun Ji, Soochow Univ. (China)
Weimin Shen, Soochow Univ. (China)


Published in SPIE Proceedings Vol. 7506:
2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments
Yongtian Wang; Yunlong Sheng; Kimio Tatsuno, Editor(s)

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