Optical digital mixed imaging system and method

An optical imaging and imaging system technology, applied in optics, optical components, image enhancement, etc., can solve problems such as difficult and limited range, and achieve the effect of expanding focal depth and large defocus invariance

Inactive Publication Date: 2009-07-08
TSINGHUA UNIV +1
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the superiority of these wavefront encoders needs to be considered. It is advisable to regard the phase distribution function introduced by the selected wavefront encoder as an approximation of the ideal phase distribution function to be obtained. The existing functions are simple in form, which limits range of feasible solutions, so they are hardly optimal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical digital mixed imaging system and method
  • Optical digital mixed imaging system and method
  • Optical digital mixed imaging system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The optical digital imaging system using a rational wavefront encoder of the present invention will be described in further detail below in conjunction with the accompanying drawings and a specific embodiment:

[0044] figure 1 It is an embodiment of the optical number imaging system adopting a rational wavefront encoder, the system includes an optical imaging objective lens 4, a photodetector 6 and a digital image decoding processing unit 7, between the optical imaging objective lens 4 and the photodetector 6 A rational wavefront encoder 5 is additionally installed, and the optical axis of the optical imaging objective lens 4 passes through the coordinate origin of the rational wavefront encoder 5 . The optical number imaging method using this system is carried out as follows:

[0045] a) aiming the optical imaging objective lens 4 at the target 1 to be photographed;

[0046] b) Encode the wavefront phase of the incident light wave between the target 1 and the photod...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a system and a method for optical and digital mixed imaging. The system comprises an optical imaging object lens, a rational form wavefront coder, a photoelectrical detector and a digital image decoding and processing unit. The method adopts the rational form wavefront coder to code a wavefront phase of an incident light wave. Phi RPM(x) as an introduced phase distribution function is equal to sigma sign(x)an|x|(1+ sigma bm|x|), wherein x is a normalized radial coordinate; N and M are the highest power of a fraction and denominator polynomial respectively; {an} and {bm} are undetermined coefficients; and sign is a signum function. An intermediate blurred image which is not sensitive to defocusing is acquired on the photoelectrical detector after coding, and the digital image decoding and processing unit carries out deconvolution wave filtration on the intermediate blurred image to acquire the final clear image.

Description

technical field [0001] The invention relates to an optical-digital hybrid imaging (hereinafter referred to as "optical-digital imaging") system and method using a rational wavefront encoder, which is used for extending the focal depth of imaging and belongs to the technical field of photoelectric imaging. Background technique [0002] Usually, people hope that the optoelectronic imaging system has a large depth of focus to obtain larger imaging space and more object information, but due to the limitation of luminous flux, focal length, diffraction effect and other factors, the focal depth of optoelectronic imaging system is often insufficient. The optical digital imaging system using wavefront encoding technology encodes the wavefront phase of the incident light wave by adding a wavefront encoder to the optical system to obtain a blurred image that is not sensitive to defocus, and then uses digital image processing technology to correct the blurred image. Image decoding to g...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/46G02B27/00G06T5/00
Inventor 周峰李光伟王东生张海涛叶然闫海李静才长帅曹蕾高其嘉
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap