Wavefront sensor having a lenslet array as a null corrector

Details Wavefront sensor having a lenslet array as a null corrector Wavefront sensor having a lenslet array as a null corrector

1992-03-11

1993-08-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356121, G01J 120

Patent

active

052331741

ABSTRACT:
A wavefront sensor (10) includes a radiation sensor (2) and an array (12) of lenslets (12A) that are optically coupled to the radiation sensor. The array of lenslets has a radiation receiving surface for receiving an incident wavefront and for focussing the wavefront at a plurality of focal positions upon the radiation sensor. Each of the lenslets comprises a diffractive optical element having an optical center that is located at a predetermined point for inducing an equal and opposite tilt to a portion of the wavefront incident on the lenslet. As a result, an aberration within that portion of the wavefront is cancelled. The predetermined point is determined to be equal to and opposite a focal spot shift of the lenslet.

REFERENCES:
patent: H615 (1989-04-01), Feinleib et al.
patent: 3547546 (1970-12-01), Schier
patent: 4141652 (1979-02-01), Feinleib
patent: 4518854 (1985-05-01), Hutchin
patent: 4530736 (1985-07-01), Mutter

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