Lecture 10: Bolometers - Leiden Observatory

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Physical Layout of Semiconductor Bolometer Detection of Light: Lecture 10 A chip of doped silicon or germanium acts BOTH as bolometer detector AND thermometer High input impedance amplifier measures the voltage Voltage depends on resistance Resistance depends on temperature
Temperature Coefficient of Resistance Detection of Light: Lecture 10 We want to talk about how the temperature of the bolometer changes its electrical resistance, so we talk about the temperature coefficient of resistance: So, R depends on the temperature: ↵ = ↵(T )= 1 R dR dT The sign of the Temperature Coefficient leads to very different behaviour for a bolometer. ...where and are constants R0 Units of K 1 B
Page 1 and 2: Detection of Light: Lecture 10 Dete
Page 3 and 4: Three Basic Types of Detectors •
Page 5 and 6: A milestone in the history of bolom
Page 7 and 8: Detection of Light: Lecture 10 Stat
Page 9 and 10: Basic Operation of a Bolometer T0 W
Page 11 and 12: Steady State Operation of a Bolomet
Page 13: Bolometer Thermal Time constant The
Page 17 and 18: R vs T for intrinsic semiconductor
Page 19 and 20: Detection of Light: Lecture 10 Appr
Page 21 and 22: Detection of Light: Lecture 10 Elec
Page 23 and 24: etermining responsivity at V0 The r
Page 25 and 26: Detector responsivity from electric
Page 27 and 28: Two sources of Bolometer Heating T0
Page 29 and 30: Detection of Light: Lecture 10 Nois

Lecture 10: Bolometers - Leiden Observatory

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