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Variable Attenuator
CNI offers two types of variable attenuators to meet different application needs. The circular variable attenuator features a linearly varying optical density across a 0°–270° sector, enabling maximum adjustment of light energy. Meanwhile, the square variable attenuator provides a linearly adjustable optical density along its extended edge direction, also allowing for optimal control of light intensity.
Circular Variable Attenuator
Application
Light detector
Electronic Imaging System
Optical instruments
Materials |
A Level BK7 Optical glass, UV-fused silica |
| Outer circle diameter | Φ 54mm ± 0.25 |
| Dimensions | 54 x 42 x 67 mm |
| Wavelength range | 400 nm to 1100 nm |
Graduated Optical Density Range |
OD0-OD3 |
Density Variation Error |
± 5% @ 632.8 nm |
Membrane layer |
Page 1: Ni–Cr–Fe; Page 2: Broadband anti-reflective coating R(ave) < 0.5%; 0°–15° Incidence |
| Aperture for Light Transmission | >80 % diameter |
Damage resistance threshold |
30W/cm2 CW |
Applicable Energy |
<1000 mW |
Square Variable Attenuator
Application
Light detector
Electronics Imaging System
Optical instruments
Materials |
A Level BK7 Optical glass, UV-fused silica |
| Dimensions | 76.2 x 25.4 x 2.0 mm |
| Wavelength range | 400 nm to 1100 nm |
Graduated Optical Density Range |
OD0-OD2 |
| Density Variation Error | OD ± 5% |
Membrane layer |
Page 1: Ni–Cr–Fe; Page 2: Broadband anti-reflective coating R(ave) < 0.5%; 0°–15° Incidence |
Aperture for Light Transmission |
>80 % diameter |
| Damage resistance threshold | 30W/cm2 CW |
Note: Dimensions, band ranges, optical density values, and other specifications can be customized according to customer requirements.
Portable Variable Attenuator
| Wavelength | 400 - 1100 nm (other wavelengths available upon request) |
Dimensions |
Φ33 mm × 65 (L) mm |
Electrically Adjustable Attenuator
The electrical attenuator provides polarization-dependent attenuation and boasts advantages such as a wide attenuation range, high damage threshold, and excellent attenuation accuracy. It can be controlled via host computer software, allowing precise adjustment of the final laser output energy—enabling continuous, dynamic attenuation from 0 dB up to several dozen dB.
Model |
ATT-45 |
ATT-20 |
Wavelength range |
1.064 μm |
|
Aperture for Light Transmission |
≤5mm |
|
Polarization state |
Suitable for P-polarization |
|
Adjustment range |
0–45 dB (customizable) |
0–20 dB (customizable) |
| Step length | ≤1 dB |
|
| Control precision | 0.5 dB |
1 dB |
| Damage threshold | ≥2 J/cm² |
≥2 J/cm² @ 20 ns |
| Fastest speed adjustment | ≥3dB/s |
≥1 dB/s |
| Insertion Loss | 10% |
|
| Communication interface | RS232/422/485 |
RS232 |
| Power supply | DC 24V |
|
Note: Other parameters such as wavelength and attenuation ratio can be customized.
Size Specifications
|
|
ATT-45 (0–45 dB) |
ATT-20 (0~20dB) |
Changchun New Industries Optoelectronics Technology Co., Ltd.
Address: No. 888 Jinhu Road, High-Tech Zone, Changchun, 130103, P.R.China
International Tel:+86-431-85603799
Email: sales@cnilaser.com
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