Modulation transfer function degradation due to segmenting of the wavefront at the entrance pupil of imaging systems

1993 ◽  
Author(s):  
Yuval Gronau ◽  
Dov Freiman
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Imaging Systems ◽  
Modulation Transfer ◽  
Entrance Pupil

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

scholarly journals Evaluation of Geometrical Modulation Transfer Function in Optical Lens System

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Cheng-Mu Tsai
Keyword(s):  
Transfer Function ◽  
Ray Tracing ◽  
Modulation Transfer Function ◽  
Focal Length ◽  
Image Plane ◽  
Modulation Transfer ◽  
Lens System ◽  
Entrance Pupil ◽  
Optical Lens ◽  
Spread Function

This paper presents ray tracing algorithms to evaluate the geometrical modulation transfer function (GMTF) of optical lens system. There are two kinds of ray tracings methods that can be applied to help simulate the point spread function (PSF) in the image plane, for example, paraxial optics and real ray tracings. The paraxial optics ray tracing is used to calculate the first-order properties such as the effective focal length (EFL) and the entrance pupil position through less cost of computation. However, the PSF could have a large tolerance by only using paraxial optics ray tracing for simulation. Some formulas for real ray tracing are applied in the sagittal and tangential line spread function (LSF). The algorithms are developed to demonstrate the simulation of LSF. Finally, the GMTF is evaluated after the fast Fourier transform (FFT) of the LSF.

Sign in / Sign up

Export Citation Format

Share Document