Application of polarization in high speed, high contrast inspection

2017 ◽  
Author(s):  
Matthew J. Novak
Keyword(s):  
High Speed ◽  
High Contrast

scholarly journals High speed optical phased array using high contrast grating all-pass filters

2014 ◽  
Vol 22 (17) ◽  
pp. 20038 ◽  
Author(s):  
Weijian Yang ◽  
Tianbo Sun ◽  
Yi Rao ◽  
Mischa Megens ◽  
Trevor Chan ◽  
...  
Keyword(s):  
High Speed ◽  
Phased Array ◽  
High Contrast ◽  
High Contrast Grating ◽  
Optical Phased Array

Automated High-Dynamic-Range Three-Dimensional Optical Metrology Technique

2014 ◽  
Author(s):  
Laura Ekstrand ◽  
Song Zhang
Keyword(s):  
Exposure Time ◽  
Measurement System ◽  
High Speed ◽  
Manufacturing Industry ◽  
Dynamic Range ◽  
Three Dimensional ◽  
Optical Metrology ◽  
High Contrast ◽  
Accuracy Measurement ◽  
3D Surfaces

Measuring three-dimensional (3D) surfaces with extremely high contrast (e.g., partially shiny surfaces) is extremely difficult with optical metrology methods. Conventional techniques, which involve measurement from multiple angles or camera aperture adjustments, pose issues for high accuracy measurement in the manufacturing industry because they are difficult to automate and often induce undesirable vibrations in the calibrated measurement system. This paper presents a framework for optically capturing high-contrast 3D surfaces via flexible exposure time variation. This technique leverages the binary defocusing technique that was recently developed at Iowa State University to allow digital fringe projection with a camera exposure time far shorter than the projector’s projection period. Since the camera exposure time can be rapidly adjusted in software, the proposed technique could be automated without mechanical adjustments to the measurement system. Moreover, the exposure times are sufficiently short as to be efficiently packed into a projection period, giving this technique the potential for high speed applications. Experimental results will be presented to demonstrate the success of the proposed method.

High Contrast High Speed Normal Incidence Optical Modulator

1994 ◽  
Vol 5 (12) ◽  
pp. 29_1
Author(s):  
M. Dutta ◽  
H. Shen ◽  
J. Pamulapati ◽  
M. Wraback ◽  
M. Toysing-Lara ◽  
...  
Keyword(s):  
High Speed ◽  
Normal Incidence ◽  
Optical Modulator ◽  
High Contrast

scholarly journals Asymmetric-detection time-stretch optical microscopy (ATOM) for high-contrast and high-speed microfluidic cellular imaging

2014 ◽  
Author(s):  
Terence T. W. Wong ◽  
Andy K. S. Lau ◽  
Matthew Y. H. Tang ◽  
Kenneth K. Y. Ho ◽  
Kenneth K. Y. Wong ◽  
...  
Keyword(s):  
Optical Microscopy ◽  
High Speed ◽  
Cellular Imaging ◽  
High Contrast ◽  
Detection Time

High Contrast High Speed Normal Incidence Optical Modulator

1994 ◽  
Vol 5 (12) ◽  
pp. 29
Author(s):  
M. Dutta ◽  
H. Shen ◽  
J. Pamulapati ◽  
M. Wraback ◽  
M. Toysing-Lara ◽  
...  
Keyword(s):  
High Speed ◽  
Normal Incidence ◽  
Optical Modulator ◽  
High Contrast
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