Algorithm for expanding the dynamic range of a Shack-Hartmann sensor by using a spatial light modulator

Norbert Lindlein; Johannes Pfund; Johannes Schwider

doi:10.1117/1.1357193

1 May 2001 Algorithm for expanding the dynamic range of a Shack-Hartmann sensor by using a spatial light modulator

Norbert Lindlein, Johannes Pfund, Johannes Schwider

Optical Engineering, Vol. 40, Issue 5, (May 2001). https://doi.org/10.1117/1.1357193

Normally, the dynamic range of a Shack-Hartmann sensor is limited by the foci leaving their respective subapertures, thus a definite attachment of the foci to their subapertures is difficult. By using an array of spatial light modulators in front of the microlenses of the sensor to switch on and off the subapertures, a definite assignment of the spots to their subapertures is possible. We present a coding algorithm that needs only log2N+1 frames to assign N spots unequivocal to their subapertures.

©(2001) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Norbert Lindlein, Johannes Pfund, and Johannes Schwider "Algorithm for expanding the dynamic range of a Shack-Hartmann sensor by using a spatial light modulator," Optical Engineering 40(5), (1 May 2001). https://doi.org/10.1117/1.1357193

Published: 1 May 2001

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