scholarly journals A Pulsed Thermographic Imaging System for Detection and Identification of Cotton Foreign Matter

Sensors ◽  
2017 ◽  
Vol 17 (3) ◽  
pp. 518 ◽  
Author(s):  
Jesse Kuzy ◽  
Changying Li
Keyword(s):  
Imaging System ◽  
Foreign Matter ◽  
Detection And Identification ◽  
Thermographic Imaging

Pickled and dried mustard foreign matter detection using multispectral imaging system based on single shot method

2020 ◽  
Vol 285 ◽  
pp. 110106
Author(s):  
Mingze Li ◽  
Min Huang ◽  
Qibing Zhu ◽  
Min Zhang ◽  
Ya Guo ◽  
...  
Keyword(s):  
Multispectral Imaging ◽  
Imaging System ◽  
Single Shot ◽  
Foreign Matter ◽  
Matter Detection

scholarly journals A Parasitic Array Receiver for ISAR Imaging of Ship Targets Using a Coastal Radar

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Fabrizio Santi ◽  
Debora Pastina
Keyword(s):  
Ad Hoc ◽  
Imaging System ◽  
Range Resolution ◽  
Bounded Number ◽  
Detection And Identification ◽  
Isar Imaging ◽  
Illegal Activities ◽  
Simulated Analysis ◽  
Parasitic Array ◽  
Array Receiver

The detection and identification of ship targets navigating in coastal areas are essential in order to prevent maritime accidents and to take countermeasures against illegal activities. Usually, coastal radar systems are employed for the detection of vessels, whereas noncooperative ship targets as well as ships not equipped with AIS transponders can be identified by means of dedicated active radar imaging system by means of ISAR processing. In this work, we define a parasitic array receiver for ISAR imaging purposes based on the signal transmitted by an opportunistic coastal radar over its successive scans. In order to obtain the proper cross-range resolution, the physical aperture provided by the array is combined with the synthetic aperture provided by the target motion. By properly designing the array of passive devices, the system is able to correctly observe the signal reflected from the ships over successive scans of the coastal radar. Specifically, the upper bounded interelement spacing provides a correct angular sampling accordingly to the Nyquist theorem and the lower bounded number of elements of the array ensures the continuity of the observation during multiple scans. Anad hocfocusing technique has been then proposed to provide the ISAR images of the ships. Simulated analysis proved the effectiveness of the proposed system to provide top-view images of ship targets suitable for ATR procedures.

A Customizable Thermographic Imaging System for Medical Image Acquisition and Processing

2021 ◽  
pp. 1-1
Author(s):  
Juan A. Lenero-Bardallo ◽  
Rafael De la Rosa-Vidal ◽  
Ruben Padial-Allue ◽  
Joaquin Ceballos-Caceres ◽  
Angel Rodriguez-Vazquez ◽  
...  
Keyword(s):  
Medical Image ◽  
Imaging System ◽  
Image Acquisition ◽  
Thermographic Imaging

scholarly journals Design of thermal imaging continuous-zoom optical system

2021 ◽  
Vol 2127 (1) ◽  
pp. 012070
Author(s):  
A V Kryukov ◽  
Yu Yu Kachurin ◽  
Yu S Datiy
Keyword(s):  
Optical System ◽  
Thermal Imaging ◽  
Imaging System ◽  
Focal Length ◽  
Optical Parameters ◽  
Secondary System ◽  
System A ◽  
Detection And Identification ◽  
Objective System ◽  
Analytical Expressions

Abstract The report tells about the design of a middle wave infrared continuous-zoom imaging optical system. To capture the image in an «eye-type» infrared optical system a multi-element sensor is used. To increase the contrast of the thermal image the sensor is equipped with a cold aperture. The use of an optical system based on the continuous-zoom lens makes it possible to solve the problems of object detection and identification more effectively but requires taking into account some features of varifocal lenses. The optical system being analyzed in the report includes front zoom objective system and secondary imaging system. The front zoom optical system is composed of four groups and provides the focal length that is continuously changed with a large zoom ratio (15–20X) under the condition of a constant total length of the system. The secondary imaging system is designed for zoom system exit stop and sensor cold stop conjugation. The design technique represents analytical expressions and equations to obtain optical parameters of the front and secondary system components and the motion curves for movable groups.

Microbulldozing and Microchiseling

1969 ◽  
Vol 27 ◽  
pp. 134-135
Author(s):  
J.N. Ramsey ◽  
D.P. Cameron ◽  
F.W. Schneider
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Material Handling ◽  
Microprobe Analysis ◽  
Foreign Matter ◽  
Specific Location ◽  
Potential Problems ◽  
Knoop Indenter ◽  
Scanning Electron ◽  
Microhardness Tester

As computer components become smaller the analytical methods used to examine them and the material handling techniques must become more sensitive, and more sophisticated. We have used microbulldozing and microchiseling in conjunction with scanning electron microscopy, replica electron microscopy, and microprobe analysis for studying actual and potential problems with developmental and pilot line devices. Foreign matter, corrosion, etc, in specific locations are mechanically loosened from their substrates and removed by “extraction replication,” and examined in the appropriate instrument. The mechanical loosening is done in a controlled manner by using a microhardness tester—we use the attachment designed for our Reichert metallograph. The working tool is a pyramid shaped diamond (a Knoop indenter) which can be pushed into the specimen with a controlled pressure and in a specific location.

New Aspects in the Design of Electron Optical Magnification Systems

1972 ◽  
Vol 30 ◽  
pp. 606-607
Author(s):  
Willem H.J. Andersen
Keyword(s):  
Electron Microscope ◽  
Imaging System ◽  
Chromatic Aberration ◽  
Research Tool ◽  
Energy Losses ◽  
Objective Lens ◽  
Theoretical Limit ◽  
Optical Magnification ◽  
Chromatic Aberrations ◽  
High Degree

Electron microscope design, and particularly the design of the imaging system, has reached a high degree of perfection. Present objective lenses perform up to their theoretical limit, while the whole imaging system, consisting of three or four lenses, provides very wide ranges of magnification and diffraction camera length with virtually no distortion of the image. Evolution of the electron microscope in to a routine research tool in which objects of steadily increasing thickness are investigated, has made it necessary for the designer to pay special attention to the chromatic aberrations of the magnification system (as distinct from the chromatic aberration of the objective lens). These chromatic aberrations cause edge un-sharpness of the image due to electrons which have suffered energy losses in the object.There exist two kinds of chromatic aberration of the magnification system; the chromatic change of magnification, characterized by the coefficient Cm, and the chromatic change of rotation given by Cp.

Identification of hepatitis a virus in cell cultures by solid phase immune electron microscopy

1986 ◽  
Vol 44 ◽  
pp. 238-239
Author(s):  
C.D. Humphrey ◽  
T.L. Cromeans ◽  
E.H. Cook ◽  
D.W. Bradley
Keyword(s):  
Electron Microscopy ◽  
Liquid Phase ◽  
Cell Cultures ◽  
Rapid Detection ◽  
Hepatitis A ◽  
Hepatitis A Virus ◽  
Solid Phase ◽  
Immune Electron Microscopy ◽  
Detection And Identification

There is a variety of methods available for the rapid detection and identification of viruses by electron microscopy as described in several reviews. The predominant techniques are classified as direct electron microscopy (DEM), immune electron microscopy (IEM), liquid phase immune electron microscopy (LPIEM) and solid phase immune electron microscopy (SPIEM). Each technique has inherent strengths and weaknesses. However, in recent years, the most progress for identifying viruses has been realized by the utilization of SPIEM.

Sign in / Sign up

Export Citation Format

Share Document