Thermal Imaging using Temperature Sensitive Paint

T. Tsukamoto, M. Esashi and S. Tanaka

Tohoku University

Thermal Imaging methods using TSPThermal imaging

High speed thermal imaging using TSP Low cost TSP + CCD camera + UV illumination → important for real applicationsHigh magnification … microscope for visible lightHigh speed thermal imaging … using UV flash method

TSPEu(TTA)3 + PVB

Excitation(355 nm)

Luminescence(610 nm)

Intensity of luminescencefrom the TSPCCD

camera

Measure the temperature distribution Health care Military Evaluation of microdevices.

TSP = Temperature Sensitive PaintIR-to-visible converter array

TSPIR absorber

CCD camera

Incident IR is converted to the temperaturerise of TSP microstructures.Read out by the CCD camera.

High speed thermal imaging using UV flashing method

Heating power

Temperature

UV illumination

Intensity of the luminescence

time∆t

Shutter

Filter (610 nm)

CCD camera

Microscope

PC

pulse generator

Heating signal

Shuttertrigger

Image data

TriggerUV-LED

Device under test

(355nm)

Thermal images0.0 ms 40.0 ms10.0 ms

50.0 ms 70.0 ms

500µm

Heater

Temporal resolution : 0.2 msSpatial resolution : 39 µm

Thermal imaging using IR-to-visible convertor

IR absorber

TSP Glass

Pixel

UV

Luminescence

IR

Thermal image

Projected image of a heater

Self-suspende microstructuresare heated by an incident IR.

Temperature of the microstructuresare read by an optical way using TSP

Easy to fabricate.Thermal resistance of each pixel is higher than that of conventional bolometers. → Sensitivity can be increased.

Experimental setup

CCDcamera

Filter

Vacuum chamber

Ge lens

Heater(observationobject)

UV-LED

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