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Contributions from the aperture and the background

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Reference no: EM132490553

A particular mercury-cadmium-telluride infrared detector has a diameter of 100 µm and is sensitive to light with wavelengths from 9 to 11 µm. It collects light over a solid angle of π steradians. How many Watts does it receive from a 300 K background?

Now suppose it is protected by an aperture that acts like a blackbody at 77 K so that only 0.1 steradian sees the 300 K background. What are the power contributions from the aperture and the background?

Reference no: EM132490553

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