Linear Graduated Neutral Density Filter | UltraOpto
Product Overview
UltraOpto Linear Graduated Neutral Density Filter is specially designed for linear translation-based light intensity control scenarios. It enables precise and smooth light attenuation adjustment through direct translation, making it an ideal choice for industrial optical systems, optical communications, and photometric calibration.
The product offers a wide range of dimensions, with the minimum size reaching 6×3mm, which can be directly used as a Variable Optical Attenuator (VOA) in optical communications; the maximum size supports 150mm, adapting to the uniform adjustment needs of large beam spots. When two filters are used in reverse combination, uniform light intensity control of larger beam spots can be achieved, and the bidirectional gradient curve can also be customized according to application scenarios.
Core Advantages
Linear Translation Control:
Continuous light intensity adjustment can be achieved through translation, featuring simple control logic and smooth response.
Miniaturization Customization Capability:
With a minimum size of 6×3mm, it is specially designed for optical communications and miniaturized optical devices.
Wide Size Adaptability:
Covering sizes from 6mm to 150mm, it supports the requirements of different beam spots and system scales.
Excellent Optical Performance:
Low parallelism error, high linearity and low optical density deviation ensure attenuation consistency.
Flexible Customization Solutions:
Supports bidirectional gradient curves, special sizes and customized optical performance requirements.
Technical Parameters

Application Scenarios
Optical Communication Systems:
Miniaturized strip filters can be directly used as VOAs to realize dynamic adjustment of optical power in fiber links.
Industrial Imaging and Machine Vision:
Exposure control is achieved through translation to optimize the imaging quality of high dynamic range scenarios.
Luminance and Chrominance Calibration:
Linear attenuation of standard light sources for linear response calibration of cameras and sensors.
Laser Systems and Scientific Research Experiments:
Wide-band and high-precision light intensity adjustment to adapt to different experimental conditions and testing requirements.
Customization Services
UltraOpto can provide personalized customization of substrate materials, size specifications, gradient 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.