Optical Filters
Neutral Density Filters (ND filters) are optical filters that transmit light with even attenuation. A neutral density filter reduces the intensities of a portion of the spectrum, introducing no changes in the hue of color rendition. This attenuation behavior of density filters is achieved through absorption, reflection, or a combination of both. The optical properties of an ND filter depend on in main the Optical Density (OD) of the filter. Neutral density filters provide users with the freedom to manipulate the intensities of light without changing the spectral characteristics and serve as a useful component to prevent excessive light exposure. The applications of neutral density (ND) filters include industrial imaging, machine vision, spectroscopes, lasers, etc., where overexposure of light is harmful to camera sensors or other optical components, or when excessive light will cause inaccurate results in photometers.
Hangzhou Shalom EO offers a wide selection of stock and custom Neutral Density Filters. Regarding the homogeneous neutral density filters, the standard operation spectra options include Ultraviolet (UV) (250-380nm), Visible spectra (400-700nm), or Visible and Near Infrared (V&NIR) (400-1100nm), Infrared (IR) (2200-15000nm), while other coatings, dimensions, and shapes can be tailored upon request. The substrate materials include BK7, colored filtering glass, UV fused Silica or Silicon, Germanium, or custom. Crafted with precision engineering and superior materials, our ND Filters offer unparalleled control over light intensities without compromising spectral integrities. Besides, we also provide Continuously Variable ND filters that come in two kinds, the Circular Variable Neutral Density Filters offer flexible adjustment of the optical density through rotation about the center axis, and the Rectangular Variable Neutral Density Filters allow linear change of the optical density across the length of the filter. Crafted with precision engineering and superior materials, our ND Filters offer unparalleled control over light intensities without compromising spectral integrities.
