Bandpass Filter Glass DBT600
Bandpass filter glass, or bandpass glass, has a relatively narrow bandwidth and distinct short- and long-wavelength cutoffs, as shown in the figure. Its spectral properties are described by maximum transmittance (TM), its wavelength position (λM), short-wavelength cutoff, long-wavelength cutoff, and half-width. The source defines the half-width as the difference between wavelengths λ1 and λ2 at half the maximum transmittance, written as (λ1-λ1) nm. 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 corresponding wavelength on the long-wavelength side. For some varieties whose long-wavelength transmittance does not reach zero, transmittance at a specified wavelength is used instead. Bandpass glass is named DTB, from the initials of its Chinese pinyin name, and numbered by the wavelength position of maximum transmittance.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Main Peak | ≥36/600±2 |
| Short-Wavelength Cutoff | 0/470±5 |
| Long-Wavelength Cutoff | ≤1.0/800±5 |
| Half Bandwidth | ≤95 |
| Thickness | 4 |
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