56 mm lens system for mapping displacement of centroids of stars.

Details 56 mm lens system for mapping displacement of centroids of stars. 56 mm lens system for mapping displacement of centroids of stars.

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aphos..26..657l&link_type=abstract

Acta Photonica Sin., Vol. 26, No. 7, p. 657 - 660

Computer Science

Optical Systems

Scientific paper

A lens system configuration having six uncemented elements is discussed. The lens system is a 56 mm EFL with 11.3° field and a complicated Petzval configuration. It is different from the common lens used in imaging systems as this lens system is required to have a high resolving power. It was designed to determine the attitude of a space platform by detecting and mapping the geometric pattern of stars. Aberrations were controlled over a 0.46 ≡ 0.75 μm spectral region. It is required to deliver the geometric spot dispersion in the specific range at its focal surface and to lower the difference of displacements of centroids from the chief ray in the spectral range of interest. Only two kinds of common glass materials with low absorption and good properties were utilized in the lens system.

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