|
|
| |
AT26, AT261/7, AT2611/7
Multychannel Deformable Mirrors
The Mirror AT26 is intended for improvement of the quality a different optical system with the aim of Multychannel dynamical control of:
- wavefront shape,
- divergence of a laser beam,
- correction of atmospheric turbulence distortions, thermal and other nonstabilities in optical path.
Application regions:
- astronomy and other high resolution vision devices,
- correction of wavefront distortions in active laser media,
- etc.
|
The mirror AT26 appearance.
AT26 Segmentation layout intended for Zernike mode wavefront correction.
Other variants of segmentation...
|
|
| |
| |
| |
Technical Specification of AT26 variant
| Substrate Material |
Optical fused silica |
| Reflecting Coating |
Multylayer dielectric, others – by the Customer order |
| Optical Aperture, mm |
66 |
| Protecting Coating |
by the Customer order |
| Number of Control Channels |
20; may be changed by the Customer order |
| Control Voltage, V |
-300 ... +300 |
| Sensitivity, microns/kV, |
no less 15 |
| Hysteresis, %, |
no more 20 |
| Frequency band, Hz, |
0 - 500 |
Overall dimensions, mm
diameter
Height |
91
52 |
 |
 |
 |
 |
|
Interferograms of the mirror AT26 under control voltage.
|
AT261/7
Cooled Multichannel
Deformable Mirror,
available for use in vacuum
Cooled Multichannel Deformable Mirror AT261/7 is intended for to control CO2 laser radiation wavefront shape.
The mirror body is made of Molybdenum. The Mirror driving performs with multichannel segmented piezostack. The Mirror substrate has a system of cooling channels implemented. The design and the enclosure permit to use the Mirror inside an evacuated volume under vacuum down to 10 Pa (10-4 bar).
The mirror enclosure variant AT2611/7 can be used as a part of an evacuated volume.
|
|
| Mirror AT261/7 back side |
 |
| Mirror AT261/7 appearance |
Mirror AT2611/7 back side |
Specification
| Parameter name, unit |
Normal |
Comments |
Clear aperture diameter, mm,
- total
- cooled
- controlled part
|
60
44
25 |
Controlled diameter can be enlarged according the customer request up to cooled one |
| Reflectance of the coating under wavelength 10.6 micron and angle of incidence 00, %, no less |
99 |
Coating can be changed according the customer request |
| Permissible laser radiation density load, kW/sm2 |
1 |
Expected value |
| Control channels Quantity |
7 |
|
| Maximum stroke , micron, no less
appropriate curvature range, 1/m |
-4...+6
-1/28...1/17 |
|
| Specified initial surface shape |
plane |
|
| Class of cleanness of the surface (GOST 11141-84) |
IV |
|
| Local error of the initial surface shape, interference fringes at wavelength 0.63 µm, no more |
0.5 |
|
| Temperature dependence of initial surface shape, interference fringes at wavelength 0.63 µm/C0, no more |
0.1 |
|
| Control voltages range, V |
-200...+300 |
|
| Capacitance of a channel, nF, no more |
25 |
|
Resistance of a channel, G , no less |
1 |
|
| First resonance frequency, Hz, no less |
4000 |
|
| Hysteresis, %, no more |
20 |
|
| Nominal pressure of a coolant, bar |
2.0 |
|
| Nominal flow rate of a coolant, l/min, no less |
1.0 |
|
Upper limit (test value) of control voltages
difference, V
- under atmosphere pressure of an air
- in vacuum 104...10 Pa
|
500
410 |
|
| Upper limit (test value) of coolant pressure, bar |
3.0 |
|
| Overall dimensions, mm, no more |
 70x45 |
|
| Weight, kg, no more |
0.32 |
|
| |
| |
|
