Bandpass Interference Filters are used extensively in a variety of biotech, biomedical, and quantitative chemical applications to selectively transmit a narrow range of wavelengths while blocking all others. Interference filters are widely used in instrumentation for clinical chemistry, environmental testing, colorimetry, elemental and laser line separation, flame photometry, fluorescence, immunoassays, etc. In addition, interference filters are used to select discrete spectral lines from arc or gas discharge lamps (Hg, Xe, Cd, etc.) and to isolate a particular line from Ar, Kr, Nd:YAG, and other lasers. Interference filters are often used in conjunction with laser diodes and LEDs.
Note: Interference filters will function with either side facing the source. We recommend, however, orienting the “mirror-like” side toward the source to minimize any thermal effects. If the source overfills the actual filter area, beam vignetting may be necessary.