Real-time compensated imaging system and method using a double-p

Details Real-time compensated imaging system and method using a double-p Real-time compensated imaging system and method using a double-p

1993-12-16

1996-09-17

Dzierzynski, Paul M.

Optical: systems and elements

Holographic system or element

Using modulated or plural reference beams

359 7, 359 16, 359299, 359300, G03H 110

Patent

active

055574319

ABSTRACT:
An adaptive optics imaging system uses a double pumped phase conjugate mirror (DPCM) to compensate for phase, amplitude or polarization aberrations imposed upon a multi-pixel object beam. A remote reference beam is used to sample an aberrating medium through which the object beam is transmitted, and forms a shared hologram in a two-beam coupling medium with a local reference beam having known phase characteristics, generally plane-wave. An output beam is produced in the phase conjugate direction of the local reference beam, with the pixelized difference in phase characteristics between the output and local reference beams corresponding to the pixelized difference in phase characteristics between the object and remote reference beams; the remote reference beam is also preferably planar. The two reference beams have powers substantially greater than the object beam, and the reference beams also preferably have known intensity characteristics that allow aberrations in the object beam's intensity to be compensated. The various beams can be either pulsed or continuous wave, and can be mutually incoherent. Several different filters are described to segregate the object beam component of the output beam from the remote reference beam component.

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