Wavefront Sensor SH-CMOS
A wavefront sensor measures wavefront distortion. A microlens array divides the wavefront into small regions, and the average local slope is calculated for each microlens element. Combining these results reconstructs the complete wavefront. The information becomes adaptive optics control signals for real-time control of imaging properties and correction of incident wavefront deformation, compensating atmospheric turbulence to obtain near-diffraction-limited images. Following its deformable mirrors, ALPAO of France introduced wavefront sensors for complete adaptive optics solutions. These Shack-Hartmann sensors are designed specifically for adaptive optics. Short transmission time improves closed-loop bandwidth. Visible-series response covers 350-1000 nm, with CMOS- and EMCCD-based versions for different applications.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Number of Subapertures | 50×50 |
| Subaperture Size | 96.6 µm |
| Standard Acquisition Rate | 118 Hz |
| Maximum Acquisition Rate in ROI Mode [Source Superscript 1 Has No Explanation] | 477 Hz |
| Maximum Detector Quantum Efficiency | 67 % |
| Readout Noise [RMS] | 2.1 e⁻ |
| Repeatability [RMS] | 2 nm |
Key Features
Datasheet
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