20/10 Perfect Vision Optische Geraete Gmbh

Dirk Droste

A device for detecting a wavefront that is defined by a plurality of contiguous light beams includes an array of lenslets for isolating the individual light beams and focusing each individual light beam to a focal point in an x-y plane. The device also has a plurality of clusters which are positioned in the x-y plane, and each cluster includes a plurality of pixels that are arranged in rows aligned in an x-direction, and columns aligned in a y-direction. Additionally, each pixel of a cluster includes both a first photocell for generating an x-signal and a second photocell for generating a y-signal, respectively, in response to an illumination of the pixel by a light beam. Further, the device includes circuitry for converting the x and y signals to digital signals and then using the digital signals to determine an x-y position for the focal point of the particular light beam that is incident on the cluster. A computer then compares the respective x-y positions of the various focal points to detect the wavefront. Depending on the particular application of the device, either photodiodes or phototransistors may be selected for use as the photocells in the pixels.

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Edingen, Germany

Dirk Droste