KOPP NARROW BAND PASS FILTERS from Bes Optics, Inc. - Kopp narrow band pass filters are made by combining two or more color filter elements either in standard or special thicknesses.


Narrow Bandpass Filters

The large variety of Kopp filter glass permits great flexibility in the design of narrow bandpass filter suitable for analytic photoelectric colorimetry. These filters are made by combining two or more color filter elements either in standard or in special thicknesses. The resulting combination filters transmit radiation falling in narrow spectral regions.

Narrow bandpass filters, when used for isolating lines of brightline emission sources, such as mercury vapor lamps, may be called monochromatic filters. For isolating the emission lines of mercury vapor spectrum, the filters shown with an (*) will be found useful.

Other combinations can be designed for specific applications.

Approximate Wavelength for Maximum Transmittance	CS Number	Approximate Thickness of Set
365 nm*	7-83	7 mm
405 nm*	5-62	11 mm
430-436 nm*	5-74	7 mm
460 nm	5-75	5 mm
485 nm	4-104	8 mm
515 nm	4-105	11 mm
546-550 nm*	4-102	12 mm
578-580 nm*	3-110	7 mm
610 nm	2-77	7 mm
640 nm	2-78	5 mm
720 nm	2-113	9 mm
750 nm	7-84	12 mm
950 nm	7-85	6 mm
2200 nm	7-86	7 mm
2400 nm	7-87	7 mm

* Mercury Spectrum Lines


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