Compensated telescope system with programmable diffractive optic

Details Compensated telescope system with programmable diffractive optic Compensated telescope system with programmable diffractive optic

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005opten..44b3201g&link_type=abstract

Optical Engineering, Volume 44, pp. (2005).

Computer Science

Performance

3

Scientific paper

Diffractive wavefront control with programmable optically efficient modulo gratings has been successfully demonstrated as a means of compensating large optical aberrations and steering an outgoing beam over small angles without mechanical motion. This work builds on past work to demonstrate the integrated performance of a programmable diffractive element of large pixel count with a telescope system. More specifically, a liquid-crystal-based spatial light modulator is used as a reconfigurable diffractive optical element in a telescope system to compensate for large aberrations associated with variations in object range and field angle within the telescope's field of regard. The telescope consists of a conventional primary mirror that gimbals relative to the other components of the system and a programmable diffractive optic that compensates for more than 40 waves of aberration associated with defocus and off-axis aberrations. In this setup, aberration compensation via the programmable diffractive optic allows the object range to be varied by 160 times the depth of focus and increases the diffraction-limited field of regard by a factor of 70 while maintaining near-diffraction-limited performance.

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