Analytical optimal solution of the extension of the depth of field using cubic-phase wavefront coding Part I Reduced-complexity approximate representation of the modulation transfer function

2008 ◽  
Vol 25 (5) ◽  
pp. 1051 ◽  
Author(s):  
Saeed Bagheri ◽  
Paulo E. X. Silveira ◽  
Daniela Pucci de Farias
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Optimal Solution ◽  
Depth Of Field ◽  
Cubic Phase ◽  
Modulation Transfer ◽  
Approximate Representation ◽  
Wavefront Coding ◽  
Reduced Complexity

scholarly journals Investigation of extended depth-of-field f/8 camera with optimized cubic phase mask and digital restoration

2020 ◽  
Vol 238 ◽  
pp. 03008
Author(s):  
Po-Sheng Chiu ◽  
Kurt Vonmetz ◽  
Federico Canini ◽  
H. Paul Urbach
Keyword(s):  
Mean Squared Error ◽  
Imaging System ◽  
Optimal Solution ◽  
Phase Mask ◽  
Depth Of Field ◽  
Cubic Phase ◽  
Modulation Transfer ◽  
Original Design ◽  
Digital Restoration ◽  
Extended Depth Of Field

An investigation of extended depth-of-field camera with optimized phase mask and digital restoration is presented. The goal of this paper is to implement the wavefront coding technique without affecting much of the original design, and the design has taken the complexity of imaging system into consideration. The optimized strength of cubic phase mask (CPM) is based on the analytical optimal solution for the task-based imaging system [J. Opt. Soc. Am. A 25, 1064 (2008)]. The noisy intermediate images of CPM system with highest spatial frequency of interest can be effectively restored by vector-based Richardson-Lucy algorithm. Restoration from the system with generalized CPM produces precise image position than the system with CPM does. In general, the CPM system procures modulation transfer function higher than 0.195 in the whole depth-of-field, and the mean squared error of the restored images are less than 5 %.

A Binary Phase only Pupil Masks for Extending the Depth of Field of a Microscopy

2013 ◽  
Vol 333-335 ◽  
pp. 1591-1596
Author(s):  
Xin Yi Wang ◽  
Zhong Bao Xu ◽  
Zou Shuang
Keyword(s):  
Transfer Function ◽  
Wave Front ◽  
Modulation Transfer Function ◽  
Imaging System ◽  
Depth Of Field ◽  
Modulation Transfer ◽  
Field Range ◽  
Microscopic Imaging ◽  
Annular Ring ◽  
Binary Phase

A binary phase only pupil mask with phase rings is placed on the plane of the aperture to modulate the wave front of the traditional microscopic imaging system, the modulation transfer function curves, obtained by the annular ring aperture applied to the pupil of the imaging system, do not change much within the required depth of field range, therefore, the loss of systems imaging information is avoided,meanwhile the depth of the field is enlarged. The Zemax simulated result shows that it is able to make the depth of field of microscopic imaging system extend 10 times to adopt this method.

Analyzing wavelength behavior of a cubic phase mask imaging system based on modulation transfer function

2012 ◽  
Vol 285 (6) ◽  
pp. 1082-1086 ◽  
Author(s):  
Rongfu Zhang ◽  
Min Zhang ◽  
Kang Lu ◽  
Tao Wang ◽  
Liangliang Wang ◽  
...  
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Imaging System ◽  
Phase Mask ◽  
Cubic Phase ◽  
Modulation Transfer

Modulation transfer function of infrared focal plane arrays

2015 ◽  
Author(s):  
S. D. Gunapala ◽  
S. B. Rafol ◽  
D. Z. Ting ◽  
A. Soibel ◽  
C. J. Hill ◽  
...  
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Focal Plane ◽  
Focal Plane Arrays ◽  
Modulation Transfer ◽  
Infrared Focal Plane Arrays
Sign in / Sign up

Export Citation Format

Share Document