Optical Filters 2013 - SCHOTT North America

SCHOTT optical filter glassesSCHOTT has been offering optical filter glasses since 1886. “Color glass withcharacteristic absorption,” as it was called in the catalogue of 1886, includeddidymium-phosphate glass, ceroxid-phosphate glass, and uranium oxide-phosphateglass. Over its long history, SCHOTT has further developed and optimizedits optical filter glass portfolio and now offers:• Longpass filters like GG, OG, or RG glass types• Shortpass filters like KG glass types• Bandpass filters like UG, BG, or VG glass types• Neutral density filters like NG glass types• Multi-band filters (BG36)Internal Transmittance of SCHOTT Optical Filter GlassNGNG11NG5NG4Neutral density filterN-WGGGOGRGN-WG280N-WG295N-WG305N-WG320GG395GG400GG420GG435GG455GG475GG495OG515OG530NG3 NG9 NG1OG550OG570OG590RG610RG630RG645RG665RG695RG715RG9RG780RG830RG850Longpass filterRG1000BG36BG36Multi bandpass filterKGKG5KG3KG1KG2Shortpass filterVGS8023S8022VG9Bandpass filterBGBG3BG25BG7Bandpass filterBGBG61BG60BG62Bandpass filterBGS8612BG50BG39BG18 BG42BG55BG38BG40Bandpass filterUGUG5 UG11 UG1UV bandpass filterUVvisibleIR200 300 400 500 600 700 800 900 1000Wavelength [nm]SCHOTT optical filters as acombination of filter glassesand interference filtersA combination of both filter types enables a broad range of special filters, e.g.:• Linear variable filters (VERIL) use filter glass and an additional interference filtercoating• Tristimulus filters use a combination of different types of filter glass• Bandpass filters with broadband rejection are achieved by using filter glasstogether with an interference filter• Optical filter glasses with a protective coating or additional interference coating