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七十年代开始应用的一种新的、全面而客观的像质评价方法——光学传递函数法(简称OTF),目前已在国内外得到了较为普遍的应用。尤其是把它作为评价照像物镜成像质量的重要指标,能为光学设计和加工提供十分有用的信息。光学传递函数的方法,就是把一个成像系统看作为一个线性不变系统,该系统的像分布的付立叶变换与物分布的付立叶变换之比,就叫作光学传递函数。传统的评价成像系统质量的方法有星点法和鉴别率法。我们知道,一个点物经过系统之后,成为一个像斑,所谓星点法的实质就是用目视的方法观察像斑的形状和能量分
A new, comprehensive and objective evaluation method of image quality - Optics Transfer Function (OTF), which has been applied in the seventies, has been widely applied at home and abroad. In particular, it is an important indicator for evaluating the imaging quality of a photographic objective lens, which can provide very useful information for optical design and processing. The method of optical transfer function is to regard an imaging system as a linear invariant system. The ratio of the Fourier transform of the image distribution to the Fourier transform of the object distribution is called the optical transfer function. The traditional methods of evaluating the quality of the imaging system are the star point method and the discriminating rate method. We know that after a system of things through the system, as a spot, the so-called star point of the essence is to visually observe the shape of the spot and energy points