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Neutral Density Filters

In photography and optics, a neutral-density filter, or ND filter, is a filter that reduces or modifies the intensity of all wavelengths, or colors, of light equally, giving no changes in hue of color rendition. It can be a colorless (clear) or grey filter. The purpose of a standard photographic neutral-density filter is to reduce the amount of light entering the lens.

Yutai optics are good at producing ND filter.Neutral density filter, generally divided into absorption type and reflection type.Reflective neutral density filter adopts the principle of thin-film interference to pass some light through and reflect the other light (usually no longer using these reflected light). These reflected light tend to form stray light and reduce the accuracy of the experiment. At this time, please use the ABC series ray collector to collect the reflected light.Absorption neutral density filter, generally refers to the material itself or some elements in the material, to some specific wavelength of light absorption, and other wavelengths of light do not occur or have little effect.Generally, the damage threshold of absorption neutral density filter is lower, and after a long time of use, there may be fever, which needs to be paid attention to when using.

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