Colored Bandpass Filters DTB500
Bandpass filter glass, abbreviated as bandpass glass, has a relatively narrow passband with short- and long-wavelength cutoffs, as shown in the figure. Its spectral properties are described by transmittance (TM), its wavelength position (λM), short- and long-wavelength cutoffs, and half-width. The difference (λ1-λ1)nm between wavelengths λ1 and λ2 at half the bandpass-glass transmittance is called the half-width. The short-wavelength cutoff is the wavelength on the short-wavelength side of the peak where transmittance is zero. The long-wavelength cutoff is the wavelength on the long-wavelength side where transmittance is zero. For some types, transmittance does not reach zero on the long-wavelength side, so transmittance at a specified wavelength is used. Bandpass glass is named DTB from Chinese pinyin initials, with the wavelength position of its transmittance value used as the identifying number.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Main Peak TM/λM [Table header TM/λMnm; combined value retained verbatim] | >48/500+/-2 |
| Short-Wavelength Cutoff T/λ [Table header T/λnm; combined value retained verbatim] | 0/380+/-5 |
| Long-Wavelength Cutoff T/λ [Table header T/λnm; combined value retained verbatim] | 0/630+/-5 |
| Half-bandwidth λ2-λ1 | <100 nm |
| Thickness | 4mm |
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