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带通滤光玻璃简称带通玻璃是一种带宽比较窄,短波和长波有明显截止的玻璃,
如图所示。它们的光谱特性由透射比的最大值(TM）及其波长(λM)位置,短波截止波长,长波截止波长和半宽度来表示。
带通玻璃最大透射比的一半所对应的波长λ1和λ2之差值(λ2－λ1)nm称为半宽度。短波截止波长是在峰值短波侧,透射比等于零的波长。长波截止波长是在峰值长波侧,透射比等于零的波长,有些品种,在长波侧玻璃透射比达不到零,
则以某一波长的透射比表示。带通玻璃以汉语拼音第一个字母ＤＴＢ来命名,把透射比最大值的波长位置值作为它们的序号。
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带通玻璃的光谱特性图
Spectrum Characteristic Curve
Of Band-Pass Filter Glass
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This kind of
glass only transmits the light within
a narrow wavelengh range as shown
in figure. Its
spectral characteristic is composed
of
maximum transmissivity (TM), wavelength
of the peak (λM ) , front-cut-off
wavelength,behind-cut-off wavelenght,and half-peak width.
The wavelenght
corresponding to the half of the maximum transmissivity are
(λ2) and (λ1). And the half-peak
width is determined by (λ2-λ1). Front(behind)-cut-off
wavelength is corresponding to the
wavelength of＇zero＇transmissivity.But there are a few types
which transmissivities of the behind-cut-off wavelengthes
can't approach to zero,then they are determined by
the tranmissivity of the certain wavelength.
Band-pass filter
glass is named DTB in this catalogue,And wavelength of the
peak is used as its serial number.
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