Ultra-sensitive wavefront sensors
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ALPAO markets Shack-Hartmann wavefront sensors dedicated to adaptive optics applications in which the light flux is extremely low: astronomy, biology, etc. Thanks to its unique software architecture, the users benefit from all the potential of the camera while working in an extremely flexible environment such as Matlab®. Although the sensor is provided with its own control software, the user can thus efficiently develop specific applications. |
These wavefront sensors are optimised for closed-loop applications. In order to maximise the flux in each sub-pupil, the number of sub-pupils is tailored to the number of actuators in the deformable mirror (Fried/standard configurations).
If you are unable to find a wavefront sensor that fulfils your requirements, contact us by clicking here or calling us on +33 4 76 63 55 05.
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ALPAO sh49 |
ALPAO sh81 |
ALPAO sh100 |
ALPAO sh256 |
| Lenslet array |
7x7 |
9x9 |
10x10 |
16x16 |
| Dynamic (tip/tilt) |
125λ |
90λ |
72λ |
23λ |
| Accuracy |
λ/50 |
λ/75 |
λ/75 |
λ/100 |
| Frame rate from Matlab® |
> 495 fps |
>495 fps |
> 495 fps |
> 495 fps |
| Recommended deformable mirror |
HiSpeed DM52-15 ou Hi-Speed DM52-25 |
HiSpeed DM88-25 |
HiSpeed DM97-15 |
HiSpeed DM241-25 |
These models are based on an ultra-sensitive EMCCD camera manufactured by Andor Technology (link).
The principal characteristics of the EMCCD detector are summarised in the table below.
| Active Pixels |
128x128 |
| Pixel Size (µm) |
24 |
| Image Area (mm x mm) |
3.1 x 3.1 |
| Active Area Pixel Well Depth (e-, typical) |
Typical: 160 000
Maximum: 220 000 |
| Gain Register Pixel Well Depth (e-, typical) |
800 000 |
| Max Readout Rate |
10 MHz |
| Frame Rate (Frames Per Second from Matlab®) |
> 495 |
| Read Noise (e-, typical) |
< 1 to 48 @ 10 MHz |
Special designs based on these models are available on request.
> Click here to contact us and get more information on the wavefront sensor. |
