Unlock instant, AI-driven research and patent intelligence for your innovation.

Phase recovery algorithm based on reflective overlapping diffraction imaging

A phase recovery and reflective technology, applied in the field of optical detection, can solve the problems of no longer applicable and achieve the effect of large field of view

Inactive Publication Date: 2018-06-26
NANJING UNIV OF SCI & TECH
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional angle-spectrum diffraction is derived based on the parallel object plane and observation plane. However, in the reflective lighting system, when the object plane and the observation plane are not parallel, these diffraction formulas are no longer applicable. Therefore, the original Coordinate projection transformation based on diffraction

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
  • Phase recovery algorithm based on reflective overlapping diffraction imaging
  • Phase recovery algorithm based on reflective overlapping diffraction imaging
  • Phase recovery algorithm based on reflective overlapping diffraction imaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] combine Figure 1 to Figure 3 , a phase recovery algorithm based on reflective overlapping diffraction imaging, the algorithm steps are as follows:

[0052] Step 1. Build a reflective overlapping diffraction imaging device:

[0053] combine figure 1 The reflective overlapping diffraction imaging device includes a light source 1, an X-Y translation stage 2, a sample to be tested 3, a mirror 4, and a CCD5. The light source 1, the X-Y translation stage 2, and the CCD5 are arranged in sequence along the horizontal direction of the optical path. The light source 1 and the CCD5 are in the the same level.

[0054] Step 2. Turn on the light source 1, place the sample 3 to be tested on the X-Y translation stage 2, and use the X-Y translation stage 2 to adjust the position of the sample 3 to be tested, so that the light source is incident on the sample 3 to be tested at an incident angle θ, and the light is reflected It is located on the same level as the corresponding inciden...

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 discloses a phase recovery algorithm based on reflective overlapping diffraction imaging. Based on the construction of a reflective overlapping diffraction imaging device, an object to be measured is placed at a reflection position, and the object to be measured is moved relative to illumination light row by row and column by column. A diffraction pattern of a sample is collected ona CCD target surface, the object to be measured is taken off, a mirror is placed at the reflection position, the reflected diffraction pattern of the illumination light is collected on the CCD targetsurface, and an PIE algorithm is used twice to finally obtain the phase information of the sample to be measured. The phase recovery algorithm has the advantages of lensless imaging, wide field of view, fast convergence and capability of detecting reflective samples.

Description

technical field [0001] The invention belongs to the field of optical detection, in particular to a phase recovery algorithm based on reflective overlapping diffraction imaging. Background technique [0002] Coherent Diffraction Imaging (CDI) has developed rapidly in the past few decades, but it has been stagnant for a long time due to the influence of algorithms. In 2004, Professor Rodenburg of the University of Sheffield in the United Kingdom proposed a phase recovery imaging method based on transverse scanning in 2004, and named it ptycholographic iterative engine, or PIE for short. This method scans the object to be tested with localized illumination light in space and uses a charge-coupled device (CCD) to simultaneously record multiple diffraction spots generated during scanning. The amplitude and phase information of the measured object can be recovered quickly and accurately, so the imaging of large-sized objects can be obtained quickly. [0003] The PIE algorithm pr...

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): G01N21/01G01N21/47
CPCG01N21/01G01N21/4788
Inventor 高志山黄嘉铃窦健泰袁群陈铭殷慧敏倪瑞沪
Owner NANJING UNIV OF SCI & TECH