flir lunch & learn seminar at phoenix, az - presentation
TRANSCRIPT
Ross OverstreetSenior Sales Engineer
R&D/Science Segment
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Agenda
• Quick intro to FLIR
• ResearchIR Software & FLIR Camera Demo
• Types of IR cameras and how they work
***LUNCH***
• Microscope Optics, Extender Rings & Spot Size
• PCB Inspection demo
• Emissivity & Accuracy
• High Speed Infrared Demo
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FLIR Science Segment Engineers
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FLIR ResearchIR Software & Camera Demo
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Types of Infrared Cameras
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SWIR MWIR LWIR
1.7µm 2.5µm 3.0µm 5.0µm 14.0µm8.0µm
NIR
1.0µm
UV Visible
0.4µm
Silicon CCD
Thermal or Power Detectors – Lower Cost
Photon Detectors – Higher Performance
InSb
IR Detector Technologies
InGaAs
µBolometer
QWIP
LW MCTMW MCTSWIR MCT
Thermal Bands
BB InSb
SLS
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• Thermal or Power detectors -Pixels are directly heated by Infrared Radiation
• Change in Resistance in response to Δtemperature
• Vanadium Oxide (VOx )
• Amorphous silicon (AS)
Microbolometer Basics
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Microbolometer TrendsYEAR Camera NEdT Pkg Price
2003 SC2000 100mK $70K
2004 A40 80mK $39K
2009 A325A320
50mK50mK
$23K $13K
2010 SC660SC620
30mK45mK
$43K$33K
2014 T650scA655scT450scA325sc
<30mK
<50mK
$28K$20K$15K$10K
2015 T1000 series <30mK $43K
32
0x2
40
64
0x4
80
10
24
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Features:• Low Cost• Rugged & OK for 24x7 use• 6 deg telescope to 25um micro optics• Low Power, Light Weight, Portable
Microbolometer Review
Limitations:• Slow (30 fps)• Long time constant (6-12ms)• No control over timing/triggering• No access to raw data• Limited support for custom optics• Less optics options than cooled cams
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300K
InSb FPA
Window (1-12um)
Cold Filter 3-5um
Vacuum
Cold Stop (defines f#)
baffle<77K
Compressor Piston
Photon Detectors
• Photons are converted into electrons and stored in an integration capacitor
• InSb cameras have quantum efficiency ~90%
• Major detector types
•InGaAs (0.4-1.7um)
•InSb (1-5um)
•SLS (7.5-9.5 um)
Photon Counting Detector Basics
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Focal Plane Array
Typical Cooled Camera DDCA
Linear Stirling Cycle Cryocooler
Cold Finger
Cold Shield
Cold Stop
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Assets:• Most sensitivity (18-35mK)• Very fast! Both frame rate & integration time• Most flexible optics• Lowest level access to raw data• Tremendous control over timing/triggering
Photon Counting Camera Review
Limitations:• Expensive ($50K-$140K)• 8-12K hour MTBF• Less portable
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Microbolometer Cooled Camera
Sensitivity (NEdT) 30-50mK 18-35mK
Frame Rate 30 fps 120-2000+ fps
Shutter Speed 8ms TC = 40ms response time 1-4ms typical
Triggering NA extensive
Optics 7 deg to 25um 1 deg to 3.5um
Costs $10K - $30K $50K - $140K
Microbolometer / Cooled Comparison
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Sensitivity
A6700sc <20mK T650sc/A655sc <30mK
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Cooled cams originally designed for Military Test Range
Near IR (NIR): SC6200 InGaAsMidwave IR (MWIR): SC8313 InSbLongwave IR (LWIR): SC6700 SLS
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New A-series Cooled Cameras
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Most common FLIR R&D/Science CamerasPe
rfo
rman
ce
T630scT650sc
A655sc
T430scT450sc
A325sc
SC6800
SC6700
SC8300SC8200
A6700sc/A6750sc
A8300sc
Call for current pricing
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LUNCH BREAK!
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Spatial Resolution is becoming more important!
21
Surface Mount Technology (SMT)
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Close-Up Optics & Extender Rings
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Common Spatial Resolution / FOVs
Spatial Res. um/pixel 320x240 FOV (mm) 640x480 FOV (mm)
100 32x24 64x48
50 16x12 32x24
25 8x6 16x12
Mag Factor 640x512 1280x720
1X = 14um/pix 9.6 x 7.7 17.9 x 10.1
4X = 3.5 um/pix 2.4 x 1.9 4.5 x 2.5
Un
coo
led
Co
ole
d
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Spatial Accuracy – Spot Size Concerns
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Sizes of Surface Mount Components
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A325sc, 45 deg lens, min focus
• 168mm x 128mm @ 200mm (WD)• 525um IFOV• 2x1 pixels “on target”• Bad Data!
Do the math…Assume 0402 R (1.0 x 0.5mm)
A325sc, 45 deg lens, “micro trick”
• “push” in to 1.5” working distance• 125um IFOV, 40mm x 30mm FOV • 8x4 pixels “on target”• Decent Data!
A325sc, 50um lens
• 12mm x 16mm @ 33mm (WD)• 50um IFOV• 20x10 pixels on target• Great Data!
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Spatial Resolution
25 um/pixel lens, 16x12mm overall FOV
4 um/pixel lens 5.1mm x 2.9mm overall FOV
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Spatial Resolution
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Mixed Signal Device – GaAsA8303sc + 4X micro (3.5um/pixel)
2.5
mm
4.5 mm
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Mixed Signal Device – GaAs - Subtracted
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Cell Phone Amplifier – A8303 4X micro
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Cell Phone Amplifier – A8303 4X micro
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Demo
• PCB Inspection
• Image subtraction
• Microscope lenses
• Extender rings
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Wabs
% transmission
% emission
% reflection
TOTAL
≠ Actual Temperature
Total Energy = e + t + r
Reflected Apparent Temperature
Apparent Temperature
Introduction to Emissivity
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EMISSIVITY VARIES WITH
SURFACE FINISHANGLE
SPECTRUM
TEMPERATURE
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Typical PCB emissivity issueShiny metal package, reports 27.5C
Kapton Tape coupon, reports 43.9C
Surface with poor emissivity under-reported by 16.4C!
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If ε is poor, coatings are your friend!
ε = 0.82-0.88 (black anodize)ε = 0.07-0.21(bare to sandblasted)
ε = 0.95 ε = 0.95 ε = 0.95 ε = varies(can be as good as tape)
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Knowledge of emissivity is critical!
Kap
ton
Stai
nle
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Flat
Bla
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Elec
tric
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Tap
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Ligh
t P
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Hea
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Po
wd
er
70C
34C
70C
17C
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HIGH SPEED & WRAP UP
[email protected], 800.905.9557 (m)
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X6900sc - World’s Fastest Full Resolution IR Camera
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High Speed Thermography
• Fast Frame rates - 640x512 @ 1000fps
• Stop Motion for Accurate Measurements
• Thermally Characterize your object
Airbag Deployment Combustion Engine Research Ballistics & Muzzle Dynamics
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On Camera Recording
• Record for 26s at full frame rate to RAM
• Fast download to Removable SSD Drive
• Quick De-Classification with removable SSD Drive