Optics and photonics. Optical transfer function. Principles of measurement of modulation transfer function (MTF) of sampled imaging systems

2010 ◽  
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Imaging Systems ◽  
Optical Transfer Function ◽  
Modulation Transfer ◽  
Optical Transfer

Imaging

2019 ◽  
pp. 382-434
Author(s):  
B. D. Guenther
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Noise Intensity ◽  
Imaging System ◽  
Optical Transfer Function ◽  
Modulation Transfer ◽  
Optical Aperture ◽  
System Properties ◽  
Incoherent Imaging ◽  
Optical Transfer

Treating an imaging system as a linear system and use llinear system properties to d iscuss both coherent and incoherent imaging. Use a one dimensional pin hole camera to study the theory of incoherent imaging. Two different criteria, Rayleigh and Sparrow, are used to define the resolution limits of the camera. From the simple theory define the optical transfer function and the modulation transfer function as appropriate characterizations of complex imaging systems. A review of the human imaging system emphasizes tits idfferences with man made cameras. Coherent imaging is based on Abbe’s theory of microscopy. A simple 4f imaging system can be used to understand how spatial resolution is limited by the optical aperture and by controlling the aperture, we can enhance the edges of an image or remove noise intensity noise on a plane wave. Apodizing the aperture allows astronomers to locate planents orbiting distant stars.

Wavefront Aberration Detection: A New Perspective

2014 ◽  
Vol 496-500 ◽  
pp. 1164-1168
Author(s):  
Ji Qiang Kang ◽  
Xue Min Cheng ◽  
Qun Hao
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Wavefront Aberration ◽  
Optical Transfer Function ◽  
Modulation Transfer ◽  
Aberration Detection ◽  
New Perspective ◽  
Optical Transfer ◽  
The Relationship ◽  
Detection Technologies

A variety of specialized wavefront detection technologies have been widely used, generally need specialized sensor or device. In this contribution, we proposed an algorithm to calculate the wavefront aberration with two-dimensional modulation transfer function data. The relationship between the wavefront aberration and the modulation transfer function is built based on the optical transfer function and simplified by applying the Newton-cotes quadrature. Thus the wavefront aberration can be numerically calculated by use of the results of the system performance in frequency domain. Numerical calculation result is provided for validating the proposed algorithm.

Error of the slanted edge method for measuring the modulation transfer function of imaging systems

2018 ◽  
Vol 57 (7) ◽  
pp. B83 ◽  
Author(s):  
Xufen Xie ◽  
Hongda Fan ◽  
Hongyuan Wang ◽  
Zebin Wang ◽  
Nianyu Zou
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Imaging Systems ◽  
Modulation Transfer ◽  
Edge Method

Optical “Seeing” over Level Terrain

1967 ◽  
Vol 1 (1) ◽  
pp. 34-35
Author(s):  
C. E. Coulman
Keyword(s):  
Transfer Function ◽  
Basic Research ◽  
Horizontal Line ◽  
Optical Transfer Function ◽  
Modulation Transfer ◽  
Unit Distance ◽  
Optical Images ◽  
Image Movement ◽  
Optical Transfer ◽  
Solar Astronomy

This work is aimed at understanding the phenomena which affect the sharpness and stability of optical images transmitted through the atmosphere. A brief description is given of the results obtained to date from an experimental field-study directed at establishing a connection between optics and meteorology. Most of the work has, so far, been conducted in daytime because our main application is to solar astronomy; other fields such as surveying, aerial reconnaissance and so on can also benefit from basic research in atmospheric optics.A horizontal line of sight over uniform, level terrain presents the simplest case for study. The optical transfer function (OTF) of the system comprising an air-path and telescope objective has been measured with an image analyser which is a modified form of stellar seeing-monitor. The outputs of this analyser are proportional to the modulus and argument of the OTF. The modulus, or modulation transfer function (MTF), is a measure of image contrast; the fluctuations of the argument measure image movement, or “dancing”. The OTF is a function of spatial frequency f (cycles per unit distance) which may be altered by radial movement of the scanning graticule of the image-analvser.

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