The circular variable neutral density filters can linearly attenuate light as the filter is rotated. These filers can be used for white light as well as for lasers. A large finite aperture can be attenuated by counter rotating two filters in series
Substrate: BK7 \Fused silica
Outside diameter: 25mm-150mm
Inside diameter: 7.5mm\8.0mm\8.3mm
Outside diameter tolerance: +0/-0.15mm
Inside diameter tolerance: +0.15/-0mm
Thickness tolerance: ± 0.1mm
Parallelism: 3 arc minutes
Standard linearity: ± 5%
Standard deviation of density end point: ± 5%
Surface quality: 80-50
Coated area: 0 - 270°
Calibrated wavelength: 550nm
Design wavelength: 380nm-2000nm(BK7)
250nm-2500nm(Fused silica)
|
Model |
Outside diameter |
Inside diameter |
Optical density |
substrate |
|
CVND10-B25C |
25 |
8.3 |
1 |
BK7 |
|
CVND20-B25C |
25 |
8.3 |
2 |
BK7 |
|
CVND30-B25C |
25 |
8.3 |
3 |
BK7 |
|
CVND40-B25C |
25 |
8.3 |
4 |
BK7 |
|
CVND10-B50B |
50 |
8 |
1 |
BK7 |
|
CVND20-B50B |
50 |
8 |
2 |
BK7 |
|
CVND30-B50B |
50 |
8 |
3 |
BK7 |
|
CVND40-B50B |
50 |
8 |
4 |
BK7 |
|
CVND10-B60C |
60 |
8.3 |
1 |
BK7 |
|
CVND20-B60C |
60 |
8.3 |
2 |
BK7 |
|
CVND30-B60C |
60 |
8.3 |
3 |
BK7 |
|
CVND40-B60C |
60 |
8.3 |
4 |
BK7 |
|
CVND10-B100A |
100 |
7.5 |
1 |
BK7 |
|
CVND20-B100A |
100 |
7.5 |
2 |
BK7 |
|
CVND30-B100A |
100 |
7.5 |
3 |
BK7 |
|
CVND40-B100A |
100 |
7.5 |
4 |
BK7 |
Shenyang Academy of Instrumentation Science Co., Ltd. Was derectly belonging to Ministry of Machinery Industry as a large comprehensive scientific research academyt, now is subject to China National Machinery Industry Corporation (SINOMACH). Name listed in national comprehensive technology ability 100 research academies & institutes, AAA class credit enterprise in Liaoning province. One of the national high-tech enterprises, focus on sensor and instrument' S research, develop and manufacture.
After 40 years' Development, we have accomplished 626 scientific research items and 159 awards in state, province, ministry and city, of which there are 20 National Invention Awards and Science and Technology Progress Awards, 56 various awards in province and ministry and 80 patents and know-hows.
The main products are including:
- Pressure sensor die/wafer
- Pressure sensor & transmitter
- Dew-point transmitter
- Wafer dicing machine
- Metal bellows(Hydroformed & Electroformed)
- Optical filter & optical reflector
- Current sensor & gauss meter
We are the only manufacturer for silicon piezoresistive pressure wafer/die, and the only national research center in China.
We are the only manufacturer for electroformed metal bellows in China.
We are the largest manufacture for optical filter in China
We has passed the GB/T19001-2000. Elastic components and transducers has passed GJB9001A-2001.
We gain class AAA in both enterprise credit and banking credit.
SAIS has established a nationwide marketing network, and the products are widely employed in such military and civil industries as spaceflight, aviation, navigation, petrochemistry, Metallurgy, Heat Supply, Thermoelectricity, Hydroelectricity, Coal, Light Industry, Architecture and Pharmacy. Some of the products are exported to overseas market.
We would like to creat HB name brand, collect time elite, introduce others' Merits. It is our responsibilities to constantly increase more advanced techniques to HB products. We also strictly abide by the marketing ideology of faithfulness, carry through quality policy, innovating in products by science and technology, guarantee quality by strict administration, reduce cost by elaborated accounting, reassure clients by gualified services. We seriously complete the sales management mode of Whole Course Credit Administration, repay our clients with profound enterprise cultures, outstanding management, strong core competition abilities and qualified credit.
