scholarly journals Large Gradient Micro-Structure Topography Measurement with Multi-Angle Stitching Digital Holographic Microscope

2020 ◽  
Vol 10 (17) ◽  
pp. 6110
Author(s):  
Chuan Jin ◽  
Yu He ◽  
Yan Tang ◽  
Zhongye Xie ◽  
Lixin Zhao ◽  
...  
Keyword(s):  
Tilt Angle ◽  
High Frequency ◽  
Imaging System ◽  
Numerical Aperture ◽  
Experimental Results ◽  
Micro Structure ◽  
Complete Collection ◽  
Frequency Information ◽  
Large Gradient

We present an effective method for the topography characterization of large gradient micro-structure based on digital holographic microscope (DHM). Due to the limitation of numerical aperture of DHM system, high frequency information corresponding to large gradient regions of specimen is prohibited from entering the imaging system and the complete collection of specimen features cannot be implemented. To solve this problem, we use a common configuration of off-axis DHM system to capture the holograms from multiple angles of the sample, and the various object waves coming from the sample of different tilt angle is corrected and spliced into a fully topography by multi-angle stitching process. In this way, the measurement of large gradient topography of specimen can be realized. Experimental results of large gradient microlens demonstrate the practicability and precision of the presented method.

scholarly journals Fusion of IR and Visual Images Based on Gaussian and Laplacian Decomposition Using Histogram Distributions and Edge Selection

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Seohyung Lee ◽  
Daeho Lee
Keyword(s):  
High Frequency ◽  
Low Frequency ◽  
Experimental Results ◽  
Visual Images ◽  
Fusion Method ◽  
Large Magnitude ◽  
Frequency Information ◽  
Frequency Components

We propose a novel fusion method of IR (infrared) and visual images to combine distinct information from two sources. To decompose an image into its low and high frequency components, we use Gaussian and Laplacian decomposition. The strong high frequency information in the two sources can be easily fused by selecting the large magnitude of Laplacian images. The distinct low frequency information, however, is not as easily determined. As such, we use histogram distributions of the two sources. Therefore, experimental results show that the fused images can contain the dominant characteristics of both sources.

Characterization of Ni/γ-Al2O3 Catalyst Prepared by Atmospheric High Frequency Cold Plasma Jet for CO2 Reforming of CH4

2010 ◽  
Vol 31 (3) ◽  
pp. 353-359
Author(s):  
Xiaoyan CHAI ◽  
Shuyong SHANG ◽  
Gaihuan LIU ◽  
Xumei TAO ◽  
Xiang LI ◽  
...  
Keyword(s):  
High Frequency ◽  
Cold Plasma ◽  
Plasma Jet

scholarly journals Morpho-molecular ex vivo detection and grading of non-muscle-invasive bladder cancer using forward imaging probe based multimodal optical coherence tomography and Raman spectroscopy

The Analyst ◽  
2020 ◽  
Vol 145 (4) ◽  
pp. 1445-1456 ◽  
Author(s):  
Fabian Placzek ◽  
Eliana Cordero Bautista ◽  
Simon Kretschmer ◽  
Lara M. Wurster ◽  
Florian Knorr ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Optical Coherence Tomography ◽  
Imaging System ◽  
Ex Vivo ◽  
Large Field ◽  
Optical Coherence ◽  
Fiber Optic Probe ◽  
Optic Probe ◽  
Muscle Invasive

Characterization of bladder biopsies, using a combined fiber optic probe-based optical coherence tomography and Raman spectroscopy imaging system that allows a large field-of-view imaging and detection and grading of cancerous bladder lesions.

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