Before detecting light, one must quantify it. Radiometry is the measurement of electromagnetic radiation, including visible light.
Boyd dedicates significant space to the blackbody source. Why? Because it is the only source whose emission is calculable from first principles (Planck’s law).
If you are calibrating a detector (a photodiode or thermopile), you cannot trust the source unless it behaves like a blackbody. Understanding the shift in peak wavelength with temperature (Wien’s law) and the total power emitted (Stefan-Boltzmann law) allows you to design systems that can detect heat signatures against cold backgrounds. radiometry and the detection of optical radiation boyd pdf
Before you can detect light, you need to speak its language. Boyd emphasizes that confusion between these terms is the #1 source of error in optical labs. Here is the hierarchy:
The "Boyd Takeaway": Photometry weights everything by the eye’s response (the photopic curve). Radiometry does not. When detecting optical radiation for scientific purposes, you must think in Watts, not Lumens. Before detecting light, one must quantify it
For those seeking the Boyd PDF, it helps to know what gold lies inside. The book is typically structured to walk the reader from pure definitions to advanced detection limits.
Based on the methodologies in Radiometry and the Detection of Optical Radiation (Boyd) The "Boyd Takeaway": Photometry weights everything by the
This document outlines the functional requirements for designing an optical detection system, derived from Boyd's treatment of geometric optics and signal detection.
To implement a detection feature, the system must calculate the following: