The band gap, linear refractive indices and absorption coefficients fundamental optical constants of the film were obtained through optical transmittance measurements.
用光学透射测量方法得到了该薄膜材料的基本光学常数（带隙、线性折射率、线性吸收系数）。
The ultraviolet absorption peak narrows, absorption intensity increases, the absorption margin becomes steep and moves to longer wavelength, the optical band gap decreases as well.
紫外吸收峰变窄，强度增加，吸收边变得陡峭并向长波方向移动，光学带隙降低。
It also showed that the optical absorption edge of the annealed film appeared shifted towards the longer wavelength side and the band gap decreased by 0.
光学性质显示退火处理的薄膜吸收边缘明显的向长波的方向移动，发生红移现象，而且禁带宽度减少了0。
This paper reviews the research progress in both theoretical and experimental aspects of band-to-band optical absorption transition effect in narrow gap semiconductor HgCdTe.
本文主要论述窄禁带半导体碲镉汞的带间光吸收跃迁的理论和实验。
The results show that C, P, N, S doped anatase TiO2 all can cause the absorption band of optical catalysis to red-shift, the absorpotion coefficient in the visible light r.
计算结果表明，C、P、N、S掺杂锐钛矿TiO2都能使TiO2的光催化吸收带在一定程度上红移，并在可见光区有一定的吸收系数。
Differential optical absorption spectroscopy (DOAS) makes use of the flue gas pollutant different optical absorption characteristic at the UV-VIS wave band to measure their average concentration.
差分吸收光谱法是利用气体污染物在UV - VIS波段对光有不同的吸收特性来测量其平均浓度。
We also calculated the model of doping cr, which can change the energy band structure of CdGeAs2, the result is valuable for decreasing optical absorption.
同时计算了铬离子掺杂模型的能带结构，推断出铬掺杂砷化锗镉晶体能改变晶体的能带结构，降低红外吸收。
We also calculated the model of doping cr, which can change the energy band structure of CdGeAs2, the result is valuable for decreasing optical absorption.
同时计算了铬离子掺杂模型的能带结构，推断出铬掺杂砷化锗镉晶体能改变晶体的能带结构，降低红外吸收。
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