Athermal lens systems

Details Athermal lens systems Athermal lens systems

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975aoes.nasa...21k&link_type=abstract

In its Athermal Opt. Elem. and Systems p 21-55 (SEE N76-25009 15-74)

Computer Science

Glass, Lenses, Telescopes, Temperature Effects, Focusing, Lens Design, Light Beams, Optical Equipment, Radial Distribution, Ray Tracing, Temperature Gradients

Scientific paper

The theory of thermal defocussing of lens systems is discussed and conditions relating to athermal objectives are derived. New telescope objectives were designed which are insensitive to radial temperature gradients using athermal optical glasses, and three prototypes were manufactured. The objectives were tested by ray tracing and by experiments. The improvement in the temperature behavior compared to conventional objectives is remarkable.

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