AND-20S-25 20 x 20 mm Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm
- Type
- Filter
- Subtype
- Neutral Density Filter
- Brand
- OptoSigma
Properties
- Shape
- Rectangular
- A
- 20 mm
- B
- 20 mm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4599108862211283
- λ
- 550 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
AND-20S-25 20 x 20 mm Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm
OptoSigma's AND-20S-25 is a high-quality Neutral Density Filter, designed to minimize the intensity of light passing through the optical path without altering its color composition. This filter is specifically intended for use in the visible spectrum, with a wavelength of 550nm.
The filter is rectangular in shape, measuring 20 x 20 mm, and has a thickness of 2mm, making it compatible with various optical systems. It is made of UVFS Mal-1965 optical glass, a material known for its excellent optical properties and durability.
The filter features absorptive coatings on both the front and back surfaces, denoted as 'opt and-25'. This coating is designed to provide a uniform attenuation of light, ensuring a consistent optical density across the entire spectrum. The coating also enhances the filter's longevity and resistance to environmental factors.
The filter is unmounted, providing users with the flexibility to integrate it into their existing optical setup. It is designed with a thin lens shape, minimizing the potential for vignetting and ensuring a clear, undistorted image.
The AND-20S-25 is currently in stock and available for purchase through the OptoSigma website. For more information, please refer to the provided weblink.
