Assertion: optical filter | /r/HasProperty | inserted in optical path
Facets:
Source sentences:
text: Optical filter, selectively transmits light of different wavelengths Interference filter, reflects one or more spectral bands or lines and transmits others, while maintaining a nearly zero coefficient of absorption for all wavelengths of interest Dichroic filter, a very accurate color filter used to selectively pass light of a small range of colors while reflecting other colors Hydrogen-alpha filter, an optical filter that transmits a narrow bandwidth of light centred on the H-alpha wavelength Photographic filter, a camera accessory consisting of an optical filter that can be inserted in the optical path Infrared cut-off filter, designed to reflect or block mid-infrared wavelengths while passing visible light Chelsea filter, a dichromatic optical filter used for identifying coloured stones Astronomical filter, a telescope accessory used to enhance the details of celestial objects