how swir imaging contributes to the optimization of ... · what is infrared imaging? visionlink...
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How SWIR Imaging contributes to the
optimization of automatic quality control in the
food industry 2013 |
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2013 | Visionlink Infrared Seminar 2
Overview
• Xenics in Short
• New Architecture
• Products Line Overview
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Module 1: Xenics in Short
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Mission Statement
Our mission is
• to be a leading provider of infrared cameras and detectors,
• based on a strong knowledge background of
infrared detector technology,
• achieved via continuous innovation,
• application and market driven, and
• combined with a flexibility towards our customers
to find a solution to their specific infrared problem.
Visionlink Infrared Seminar 4
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Company History
• Independent supplier of infrared cameras and detectors
• Europe’s leading supplier of SWIR InGaAs imaging detectors
• Founded October 16th, 2000
• Spin-off of IMEC
• Share capital - Start-up capital 3.75 million Euro
- 2nd round investment July 2003 1.50 million Euro
- Warrants Dec 2009 1.92 million Euro
• R&D Funding - R&D funding IWT 4.00 million Euro
- R&D funding EU 4.00 million Euro
- R&D loan A380 program 13.00 million Euro
• Profitable since 2004
• Number of personnel worldwide 80
• Headquarters in Leuven, Belgium www.xenics.com
Copyright 2013 | Xenics corporate presentation 5
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Core Competences
Detector technology
ROIC design
Electronics
Mechanics
Embedded software
User software
Radiometry
Image enhancement
Visionlink Infrared Seminar 6
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Module 2: What is Infrared Radiation
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Radiation • Basically we know now that :
- There is radiation all around us
- It comes with nature (it is natural)
• Each type of radiation leads to
different applications
Visionlink Infrared Seminar 8 2013 |
• Different domains can be
distinguished :
- Gamma, X-Rays, UV, IR, Radio, …
IR wavelength range
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Transmission
• Not all radiation can “travel” free in space
- Different molecules “absorp” specific wavelengths
▪ Due to molecular interaction
- This creates so called “transmission windows”
▪ Only radiation from these zones is perceivable
Visionlink Infrared Seminar 9 2013 |
Visible
LWIR SWIR MWIR
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What is Infrared Imaging?
2013 | Visionlink Infrared Seminar 10
X-Ray UV VIS NIR SWIR MWIR LWIR
X-Ray Ultra
Violet Visible
Near
IR
Short
Wave Mid Wave
Long
Wave
0.01-10
nm
10-400
nm
400–750
nm
750-1100
nm
1.1-2.5
um
3.0-5.0
um
7.0-14
um
Pictures used with permission of Dr. Austin Richards
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Imaging in the SWIR
• SWIR images are similar to visible ones
- Persons and objects can be recognized
• However : - No Blue/Green/Red (gray)
- Imaging at night it possible
- Images depend on material behaviour at SWIR wavelengths
Visionlink Infrared Seminar 11 2013 |
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Module 3: New Architecture
2013 |
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Origin of the Architecture
• New Generation of Sensors
- More dynamic range
- Lower noise
- More compact
• Modularity
- Platform for variation on video output
- Platform for variation on sensor type
- Platform for variation on on-board processing
• Compactness
• Manufacturing
• Market price
2013 | Visionlink Infrared Seminar 13
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Sensor Boards
• First step in camera development :
- Sensor interface
• This PCB contains :
- Signal conditioning
▪ Receive sensor signals
▪ Guarantee signal integrity
- Circuit bias elements
▪ Provide required electrical signals
Visionlink Infrared Seminar 14 2013 |
Bolometer
Interface
Line Array
Interface
2D Array
Interface
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Processing Board
• FPGA board - Provides digital interface
▪ Based on user settings
- Collects digitized signal
- Implements required algorithms
▪ NUC (Non-Uniformity Correction)
▪ Shutter and cooler control
▪ Thermography
- Provides output signal
▪ In correct data format
▪ GigE/CL/Avid/BT.656/…
Visionlink Infrared Seminar 15 2013 |
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Final Assembly
• All these components are compatible
• Allow construction of different configurations
- Cold finger (cooled devices)
- Shutter (if required)
• Basic version is an OEM Module
Visionlink Infrared Seminar 16 2013 |
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Final Assembly with Housing • To obtain a camera, the stack is combined with
- Housing
- Front (for lens mount)
Visionlink Infrared Seminar 17 2013 |
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Module 4: SWIR Imaging for Food Industry
2013 |
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Art Inspection
• Advantage using SWIR camera for refloctography
- Portability (complete system with laptop fits in hand luggage)
- Real time imaging at 25 Hz
- No special illumination required
- On site inspection (no need to remove the paintings)
Visionlink Infrared Seminar 2013 | 19
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Art Inspection
• More examples
- Underlying scetch
2013 | Visionlink Infrared Seminar 20
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Industrial Applications
Food Industry
21 Visionlink Infrared Seminar
Classification
Greenish:
Higher moisture,
Softer
Reddish:
Lower moisture,
higher protein,
Harder
Heterogenous
sample sets
2013 |
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Industrial Applications
Food Industry
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Industrial Applications
Food Industry
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Industrial Applications
Food Industry
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Industrial Applications
Food Industry
25 Visionlink Infrared Seminar
Courtesy of ITRES, published in Photonics Spectra
2013 |
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Hyperspectral imaging
• Identical to Spectroscopy
- But for each individual pixel
- On one line
• Very usefull
- It delivers an image
- Tells us what is on the image
- Delivers us a “cube”
▪ 2D : image
▪ 3D : spectral information
l x
Incoming light
Spectrum
Grating
2013 | 26 Visionlink Infrared Seminar
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Industrial Applications
Using a spectral filter
1x16 pixels
2013 | 27 Visionlink Infrared Seminar
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Industrial Applications
Food Sorting - Line Scan Imaging
2013 | Visionlink Infrared Seminar 28 Courtesy of EVK
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Industrial Applications
Waste Sorting - Line Scan Imaging
2013 | Visionlink Infrared Seminar 29
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Hyperspectral imaging
• Very interesting for material observation or identification
True Color Minerals I Minerals II 2013 | 30 Visionlink Infrared Seminar
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Bobcat 640
• Smallest SWIR camera for machine vision applications
• GigE, CameraLink or CoaXpress interface
• Spectral response: 0.9 µm up to 1.7 µm
• VisNIR option: 0.5 µm up to 1.7 µm
• Resolution: 640 x 512; Pitch: 20 µm
• AD conversion: 14-bit
• TE-1 cooled
• Frame rate: 100 fps
• ROI
• Various C-mount lenses
2013 | Visionlink Infrared Seminar 31
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• GigE vision for ease of integration
• Compliant with any software that supports GenICam
• Power over Ethernet
• CameraLink
• Easy to export
• Exchangeable C-mount lenses
• On-board Image processing
• Variable integration time
• ITR and IWR mode
• VisNIR option
• Industrial components to increase operating temperature range
Bobcat 640
2013 | Visionlink Infrared Seminar 32
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Lynx Series
• Smallest SWIR line scan camera for machine vision
• GigE, CameraLink or CoaXpress interface
• Spectral response: 0.9 µm up to 1.7 µm
• Resolution: 512; Pitch: 25 µm, 1024; Pitch: 25 µm and 2048; Pitch: 12,5 µm
• AD conversion: 14-bit
• Un-cooled
• Frame rate: 40 kHz or 10 kHz
• Various Gain modes
• Uncooled
• Various C-mount lenses, optional U-mount
2013 | Visionlink Infrared Seminar 33
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Lynx Series
• GigE vision for ease of integration
• Compliant with any software that supports GenICam
• Power over Ethernet
• CameraLink
• Easy to export
• Exchangeable C-mount lenses
• On-board Image processing
• Variable integration time
• ITR and IWR mode
• Industrial components to increase operating temperature range
2013 | Visionlink Infrared Seminar 34
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Thanks!
2013 |