Two-stage optics - High-acuity performance from low-acuity optical systems

Details Two-stage optics - High-acuity performance from low-acuity optical systems Two-stage optics - High-acuity performance from low-acuity optical systems

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992opten..31.2271m&link_type=abstract

Optical Engineering (ISSN 0091-3286), vol. 31, no. 11, p. 2271-2281.

Physics

Optics

4

Acuity, Adaptive Optics, Large Deployable Reflector, Optical Properties, Wave Front Reconstruction, Aberration, Active Control, Cost Reduction, Hubble Space Telescope, Magnification, Space Erectable Structures, Wave Diffraction

Scientific paper

The concept of two-stage optics, developed under a program to enhance the performance, lower the cost, and increase the reliability of the 20-m Large Deployable Telescope, is examined. The concept permits the large primary mirror to remain as deployed or as space-assembled, with phasing and subsequent control of the system done by a small fully assembled optical active element placed at an exit pupil. The technique is being applied to correction of the fabrication/testing error in the Hubble Space Telescope primary mirror. The advantages offered by this concept for very large space telescopes are discussed.

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