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Variable
Attenuator |
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Variable
Attenuator |
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CNI
provides 4 kinds of variable attenuators for
different application. The circular variable
attenuator can make the
optical density linearly varies around a 0°-270°
circle for measuring laser energy farthest.
As for the square one, the optical density
linearly varies across the length for measuring
laser energy. Also the high power variable
attenuator is available for customization. |
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◆Circular
variable
attenuator |
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Applications:
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Detector
of photon |
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Electronic
image |
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Optical
instrumentation |
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Specifications |
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Model |
VA-C |
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Material |
BK7grade A optical glass, Fused
silica |
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Optical Density Range |
OD0-OD3 |
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Outside Diameter |
Φ54mm±0.25 |
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Dimension |
54*42*67mm |
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Linearity of Density |
±5%@632.8nm |
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Coating |
S1:Ni-Cr-Fe; S2:Boardband AR
coating; incidence angle:0°-15° |
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Clear aperture |
>80% diameter |
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Damage threshold |
30W/cm2 CW |
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Active wavelength |
400-1100 nm |
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Applicable power |
<1000 mW |
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Note: Dimension, wavelength range, OD or other
request are available upon request. |
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◆Square
variable attenuator |
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Applications:
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Electronic
image |
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Detector of
photon |
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Optical
instrumentation |
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Specifications |
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Model |
VA-S |
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Material |
BK7grade A optical glass, Fused
silica |
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Optical Density Range |
OD0-OD2 |
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Dimension |
76.2*25.4*2.0mm |
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Linearity of Density |
OD±5% |
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Coating |
S1:Ni-Cr-Fe; S2:Boardband AR
coating; incidence angle:0°-15° |
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Clear aperture |
>80% diameter |
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Damage threshold |
30W/cm2 CW |
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Active wavelength |
400-1100 nm |
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Note: Dimension, wavelength range, OD or other request are
available upon request. |
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◆Portable
variable
attenuator |
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Specifications:
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Model |
VA-P |
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Dimensions |
Φ33
mm ×65 (L) mm |
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Wavelength |
400-1100 nm
(Other wavelengths can be customized) |
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Note: Dimension, wavelength range, OD or other request are
available upon request. |
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◆Electric
attenuator |
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Electric attenuator is
polarization attenuation,
with the advantages of large
attenuation range, high
damage resistance threshold,
high attenuation accuracy,
etc. It can be controlled by
the software of the host
computer to adjust the laser
energy at the final output,
to achieve 0dB to tens of dB
attenuation range,
continuous and dynamic
attenuation of laser energy. |
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Model |
ATT-45 |
ATT-20 |
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Attenuation
wavelength |
1.064μm |
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Limiting aperture |
≤5mm |
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Polarization state |
Suitable for P
polarization |
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Dynamic adjustment
range |
0~45dB
(customizable) |
0~20dB
(customizable) |
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Step width |
≤1dB |
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Control precision |
better than 0.5dB |
better than 1dB |
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Damage threshold |
≥2J/cm2 |
≥2J/cm2@20ns |
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Fastest adjustment
speed |
≥3dB/s |
≥1dB/s |
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Insertion
loss |
10% |
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Communication
interface |
RS232/422/485 |
RS232 |
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Power supply |
DC 24V |
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Note:
Other wavelength, attenuation ratio
and other parameters are customized. |
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ATT-45
(0~45dB) |
ATT-20
(0~20dB) |
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