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ShaH
WAVEFRONT SENSORS |
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The ShaH family of industrial Shack-Hartman wavefront sensors is
intended for a wide range of applications including fast and
precise quality control of optical elements, airflow analysis,
measurement of laser beam parameters, etc. The flexible design
of the ShaH system allows optimizing the sensor parameters for a
particular application. An advantageous feature of the device is
the use of high-quality telescopes. This allows minimizing the
influence of the angle of incidence of the analyzed beam on the
instrumental function of the sensor. A special high-precision
algorithm for locating hartmann image spots centers provides
high accuracy of measurements even in difficult viewing
conditions. The SDK (C++) allows to operate all functions of the
sensor and to achieve easy integration with user software. |
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STANDARD SENSORS
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Aperture
diameter
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Spatial
resolution
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Minimum/maximum
measured
curvature
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Processing
frequency
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Maximal
exposure
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Dimensions
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mm
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μm
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m/km
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Hz
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nJ/cm2
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mm
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ShaH-0620(A):
photo
PDF |
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6
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150
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0.12/5.8
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60
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13
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80×60×40
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ShaH-0620(B):
photo
PDF |
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6
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500
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0.06/3
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60
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0.3
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80×60×40
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ShaH-1127:
photo
PDF |
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11
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150
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0.22/12
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27
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0.6
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50×50×65
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ShaH-1515:
photo
PDF |
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15
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150
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0.3/30
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15
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1.3
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51×51×85
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ShaH-3020:
photo
PDF |
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30
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750
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3/150
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60
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0.5
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342×128×93
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ShaH-6060:
photo
PDF |
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60
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1500
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12/580
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60
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0.13
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300×160×100
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ShaH-10020:
photo
PDF |
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100
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2500
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35/1600
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60
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0.05
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400×170×255
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The parameters may be changed if requested by the customer
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SPECIALIZED SENSORS
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Special technical and
scientific tasks may require the use of wavefront sensors with
advanced features. Our company has developed a series of
specialized wavefront sensors: for use in low light conditions;
for use with UV or IR; for high frequency measurements. |
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Aperture
diameter
|
|
Spatial
resolution
|
|
Minimum/maximum
measured
curvature
|
|
Processing
frequency
|
|
Maximal
exposure
|
|
Dimensions
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mm
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μm
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m/km
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Hz
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nJ/cm2
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mm
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ShaH-021300:
photo
PDF
high-speed |
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2.5
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250
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0.02/0.28
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1300
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0.08
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75×75×52
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ShaH-03500:
photo
PDF
high-speed,
for use in low light
conditions |
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3
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150
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0.06/1.1
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515
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0.4
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250×140×175
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ShaH-04130:
photo
PDF
high-speed,
for use in low light
conditions |
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4.5
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300
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0.06/1.2
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130
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0.03
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50×50×80
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ShaH-1035:
photo
PDF
for
use in low light conditions |
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10
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300
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0.13/6
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35
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0.03
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80×60×40
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ShaH-1220:
photo
PDF
for
use in low light conditions |
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12
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480
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0.3/17
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20
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0.02
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232×83×93
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ShaH-1001000:
photo
PDF
for use in low light conditions |
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100
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5000
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32/370
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1000
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0.002
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305×230×625
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ShaH-6060-UV:
photo
PDF
for use in 200-450
nm |
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60
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3000
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10/450
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60
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0.05
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400×160×100
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ShaH-10025-IR:
photo
PDF
for use in 3-10
μm |
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100
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8300
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42/300
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25
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0.04
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600×230×625
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ACCESSORIES
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The set of accessories allows
customers to compose various schemes for optical inspection.
BS-6-32
- beamsplitter and collimation module is utilized for
collimating irradiation of single mode diode laser and splitting
it for illumination of the element under test. The module
provides also an imaging of input pupil of the WFS onto the
element under test.
NAC-6
– the family of numerical aperture correctors are required for
inspection of spherical and aspherical surfaces and components.
Please, refer the schematic drawings for specification.
Technical specification:
PDF |
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SOFTWARE
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ShaH program package is
intended for measuring a wavefront by means of ShaH wavefront
sensors. Measurement data are both represented in a realtime and
stored for further post-processing and analysis.
Output:
• Raw Hartmann images
• Spot shift map
• Wavefront aberration map (3D plot, 2D projection,
synthesized interferogram, up to 66 Zernike polynomials)
• Measurement error map
• PSF (point spread function)
• MTF (modulation transfer function)
• Strehl ratio, M2 factor, Gauss-Hermite modes
• Turbulence parameter estimation (for free space measurements)
Statistical analysis can be carried out during post-processing.
If the system is equipped with a wavefront corrector, the ShaH
software allows calculating control signals for the corrector in
the closed-loop mode.
The program package Shah is
distributed as a self-installing executable file and/or a C++
SDK, which grants access to all functionality of the sensor and
allows complete customization useful to the user’s software.
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The optional program module “M2-sensor” is intended both for
measurements of intensity and phase profiles and for estimation
of the M2 factor of a single-mode laser beam on the basis of the wavefront measurement data. M2 calculations are carried on
according to ISO 11146-2 standard. The module also permits
expansion of the multimode beam into Gauss-Hermite modes in both
automatic and manual regimes.
The optional program module “Beam propagation” is intended for
simulation of the beam propagation starting from the wavefront
sensor input plane to the plane located at a doubled distance to
the plane of the beam waist. |
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