Radial Graduated Neutral Density Filter | UltraOpto
Product Overview
UltraOpto Radial Graduated Neutral Density Filter is specially designed for light field homogenization. It can precisely adjust the beam energy distribution and serves as a core optical component for laser beam shaping and imaging system optimization.
The optical density of the filter varies with the radius, supporting various customized curves such as linear and nonlinear (e.g., apodization function). It can achieve smooth attenuation transition from the center to the edge, perfectly adapting to application scenarios like Gaussian beam flattening, stray light suppression, and central energy adjustment.
Core Advantages
Flexible Customization of Optical Density Distribution:
Supports multiple variation curves including linear and nonlinear (apodization type), and can customize the variation trend of optical density with radius according to requirements.
Dual Morphologies for Different Scenarios:
Two typical morphologies (bright center/dark edge and dark center/bright edge) are suitable for different optical systems such as laser homogenization and background suppression respectively.
Excellent Optical Performance:
Low parallelism error and high optical density control accuracy ensure the consistency and stability of beam shaping.
Wide Bandwidth Coverage:
BK7/K9 substrate covers 380~2000nm, and quartz substrate extends to 250~2500nm, adapting to wide-spectrum applications from ultraviolet to near-infrared.
Balance Between Standardization and Customization:
Provides standard sizes such as Φ25mm and Φ50mm, as well as standard specifications like OD1/OD2/OD3, while supporting the development of special sizes and customized curves.
Technical Parameters
| Parameter Item | Specification |
|---|---|
| Base Material | BK7/K9、quartz |
| Parallelism | 3′ |
| Optical Density Deviation | ±5% |
| Wavelength Range | 380~2000nm（BK7/K9）；250~2500nm（quartz） |
Standard Product Specifications
| Model | Base Material | Size | Optical Density |
|---|---|---|---|
| SBDF10-B25 | BK7/K9 | Φ25mm | OD1 |
| SBDF20-B25 | BK7/K9 | Φ25mm | OD2 |
| SBDF30-B25 | BK7/K9 | Φ25mm | OD3 |
| SBDF10-B50 | BK7/K9 | Φ50mm | OD1 |
| SBDF20-B50 | BK7/K9 | Φ50mm | OD2 |
| SBDF30-B50 | BK7/K9 | Φ50mm | OD3 |
Application Scenarios
Laser Light Source System: Gaussian beam homogenization and energy distribution shaping to achieve flat-top beam output, improving the uniformity of laser processing and measurement.
Imaging System Optimization:
Suppressing central glare and reducing background stray light, improving the dynamic range and contrast of large-field imaging.
Photometric and Colorimetric Calibration:
Serving as a standard attenuation component for the non-uniform response calibration of light sources and camera sensors.
Scientific Research Experiments:
Spectral analysis, beam diagnosis, and light intensity homogenization control, adapting to the optical requirements of different experiments.
Customization Services
UltraOpto can provide personalized customization of substrate materials, size specifications, optical density variation curves, wavelength ranges, and coating schemes according to your specific needs, helping your optical system achieve optimal performance.
For more technical details or customized solutions, please feel free to contact our technical team.
