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在波长比对装置光学系统中,有一个重要的光学元件,即对波长6328埃和3.39微米均为半透的分光镜。由于要工作在可见区和近红外的两个不同波长上,在材料的选择和镀制工艺上需要稍加注意。该分光镜(平板型)的技术要求和使用条件如下: 用6328埃、3.39微米的P偏振光以布儒斯特角从空气入射,要求反射与透射光强之比1:1,误差
In the optical system of the wavelength matching device, there is an important optical element, that is, a dichroic mirror that is semi-transparent to wavelengths of 6328 angstroms and 3.39 microns. Due to work in the visible region and near infrared two different wavelengths, the material selection and plating process need a little attention. The technical requirements and operating conditions of this spectroscope (plate type) are as follows: incident from air at Brewster’s angle with P-polarized light of 6328 angstroms and 3.39 microns, requiring a 1: 1 ratio of reflected to transmitted light intensity, error