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）。

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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。

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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。

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