ALPAO: Deformable mirror and adaptive optics systems.

  
ALPAO Hi-Speed DMs are based on continuous reflective surface motioned by magnetics actuators. They feature large strokes, linearity and fast settling time to meet and exceed your requirements for fast, accurate wavefront correction.
  

KEY FEATURES:

• Large deformation:
Up to 80 μm optical deformation (peak to valley): to correct large amplitude aberrations.  
Up to 5.0 μm optical deformation (inter actuator): to correct high spatial-frequency aberrations.  
 
High dynamic motion: 
Settling time as low as 500 µs within +/-10%.  
 
Excellent linearity and low hysteresis: 
Non linearity error < 3%

DEFORMABLE MIRRORS (DM)

Hi-Speed deformable mirror
DM
69

DM
88

DM
97-08

DM
97-15

DM
241

DM
277

DM
468*

DM
820*

Number of actuators
69
88
97
97
241
277
468
820
Pupil diameter (mm)
10.5
20.0
7.2
13.5
37.5
24.5
33.0
45.0
Pitch (mm)
1.5
2.5
0.8
1.5
2.5
1.5
Mirror best flat in close loop
7.0 nm RMS (no print through)
Wavefront tip/tilt stroke (PtV)
60 µm
40 µm
80 µm
60 µm
40 µm
15 µm
Wavefront focus/astig. stroke
40 µm
30 µm
40 µm
40 µm
30 µm
10 µm
Wavefront 3x3 stroke (µm PtV)
> 25
> 10
Settling time (at +/-10%)
800 µs
1.6 ms
800µs
1.6 ms
500µs
Bandwidth (Hz) (1)
> 750
> 400
> 750
> 400
> 2000
Deformable mirror logo
Frequency at 45° phase lag (Hz)
> 500
> 300
> 500
> 300
> 1500
Hysteresis error
< 2%
Non-linearity error
< 3%
Coating (2)
Protected Silver
Operating temperature (3)
-10 to 35 °C
*  Preliminary specifications 
(1)  first resonance of the membrane (higher bandwidth available upon request)
(2)  other coating available
(3)  compatible with cryogenics environment