Circular Variable Neutral Density Filter IR
Description
The Circular Variable Neutral Density optical filters (IR) are filter wheels to linearly attenuate light as the filter is rotated. The CVND (IR) can be used for white light as well as for lasers. A large finite aperture can be attenuated by counter rotating to filters in series. Sizes are available from 25mm to over 200mm in diameter.
Custom sizes and densities are available upon request.
ISO 9001:2015 certified and ITAR registered
Circular Variable Neutral Density Filter IR
Specifications |
|
|---|---|
| Attenuator Type: | Absorptive |
| Shape: | Round, Custom |
| Size: | 25 - 200 mm |
| Optical Density: | 0 to 1, 2, 3, 4 or 5 |
| Type Of Attenuator: | Filter Wheel |
| Substrate Material: | Zinc Selenide |
| Coating Type: | Metallic |
| Optical Density Range: | Specify: 0 to 1, 2, 3, 4 or 5 |
| Outside Diameter (OD): | 25mm - 200mm ± 0.2mm |
| OD Tolerance: | ± 5% Absolute |
| Inside Diameter: | 7.5mm - 25.4mm ± 0.2mm |
| Thickness: | 2.0mm ± 0.2mm |
| Wavelength Range: | 2.0µm - 5.0µm |
| Wavelength Calibration: | 2.5µm |
| Gradient Range: | 270° Typical |
| Parallelism: | < 3 Arc Minutes |
| TWE: | < 2 Waves per 25mm |
| Centration: | ± 0.2mm |
| Surface Quality: | 80/50 Scratch & Dig |
| Clear Aperture: | 80% of Diameter |
| Anti-Reflection Coating: | Available |
Features
- Better Performance
- Custom Wavelengths
- Density Range Options
- Various Substrate Materials
- Wide Aperture
- Dimensions
Applications
- Attenuation of white light and laser sources
- Maintain light intensity consistency and calibration
- Large aperture attenuation
- Can be used as a variable beamsplitter
For pricing, technical or any other questions please contact the supplier
- No registration required
- No markups, no fees
- Direct contact with supplier
Contact Supplier
How to order?
-
Ships from:
United States
-
Sold by:
-
On FindLight:
since 2015
Frequently Asked Questions
In imaging systems, large aperture neutrality with constant density can be achieved by configuring two filters of equal design back-to-back. Counter-rotating the two filters allows for a variable setting of the density or transmission requirement in both the rotational and radial directions.
Yes, CVND filters are fully customizable in optical density gradient function, transmission gradient function, substrate type, coating materials, and size to match your application requirements.
CVND filters can be used for attenuation of white light and laser sources, maintaining light intensity consistency and calibration, large aperture attenuation, and as a variable beamsplitter.
A CVND is a filter wheel that can be rotated to linearly attenuate light, and can be used for both white light and lasers.
Sizes are available from 25mm to over 200mm in diameter, and custom sizes and densities are available upon request.