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答读者1.光源对光圈计算有影响吗? 光圈是用来度量光学零件面形误差的一种计量单位。光学零件的面形误差,主要指平面的平面度偏差、球面的半径误差和两者的局部误差。这些误差,在生产中一般用比较法进行检验,也就是用一标准面与零件受检面作比较,求其两者在规定范围内(一般为零件直径D)的最大偏离量,图(a)、(6)中的△h,此标准面就是样板工作面。检验原理是利用光的干涉,观察其干涉图样的条纹数和规则程度。最大偏离量△h不用一般的长度单位来计量,而用λ/2作为度量单位,λ为光波波长。将此干涉图样称光圈,其条纹数称光圈数,用N表示,
A reader 1. Does the light source affect the aperture calculation? Aperture is a measurement unit used to measure the error of a surface shape of an optical component. Optical parts of the shape error, mainly refers to the flatness of the plane deviation, the radius of the spherical error and the two local errors. These errors, in the production of the general comparison method to test, that is, with a standard surface and parts of the tested surface for comparison, both in the specified range (usually part diameter D) of the maximum deviation, Figure (a ), (6) △ h, this standard surface is the model face. The test principle is to use light interference to observe the number of fringes and the degree of regularity of the interference pattern. The maximum deviation Δh is not measured in the usual unit of length, but λ / 2 is used as the unit of measurement and λ is the wavelength of the light. The interference pattern called the aperture, the number of fringes called aperture, with N said,