To compare detectors, Boyd defines specific metrics that every engineer must know:
One of the central theorems in Boyd’s text is the Conservation of Radiance (or Brightness).
Based on the fundamental principles from R.W. Boyd
This text is a staple in optical engineering because it bridges the gap between theoretical physics and practical engineering. Below is a breakdown of the essential knowledge areas covered in the book. radiometry and the detection of optical radiation boyd pdf
Boyd, a pioneer in nonlinear optics, reminds us that lasers break the rules of traditional radiometry. Incoherent light (like an LED or a bulb) spreads out. Coherent light (laser) can be focused to a diffraction-limited spot, achieving enormous irradiance.
When detecting a laser, the spatial coherence changes the statistics of the photons (from Poissonian to Bose-Einstein in some cases), which affects how you calculate the noise floor.
Based on the methodologies in Radiometry and the Detection of Optical Radiation (Boyd) To compare detectors, Boyd defines specific metrics that
This document outlines the functional requirements for designing an optical detection system, derived from Boyd's treatment of geometric optics and signal detection.
Radiometry and the Detection of Optical Radiation is not a flashy textbook. It contains no color plates or interactive simulations. But for the practitioner who needs to know whether a thermopile or a photodiode is right for a given experiment—or why the signal-to-noise ratio improves with the square root of integration time—Boyd’s clarity is unmatched.
The search for a PDF copy is a testament to the book’s enduring utility. Until a modern revision appears (or Wiley reprints the original), those serious about optical detection would do well to hunt down a legitimate copy through interlibrary loan or a used bookseller. Boyd’s lessons on the fundamental limits of light measurement remain as relevant today as when they were first written. Detectivity ($D$): The reciprocal of NEP
Reference: Boyd, R. W. (1983). Radiometry and the Detection of Optical Radiation. Wiley. ISBN 0-471-86188-X
Robert W. Boyd's 1983 textbook, "Radiometry and the Detection of Optical Radiation," offers a foundational, 14-chapter overview of electromagnetic radiation, blackbody theory, and sensor noise analysis, bridging radiative transfer with modern detection systems. Widely used in optical engineering, it provides comprehensive, mathematically rigorous content on topics ranging from the Radiance Theorem to specific photoemissive and thermal detector mechanisms. A preview of the content is available through the NASA ADS link
Radiometry and the Detection of Optical Radiation - Wiley-VCH
Robert W. Boyd's "Radiometry and the Detection of Optical Radiation" is a foundational graduate-level text offering a unified treatment of the generation, transfer, and measurement of optical and infrared radiation. The book provides a detailed framework for understanding key radiometric quantities, blackbody radiation, and the physical mechanisms of various detectors, including thermal and photoemissive sensors. You can access a copy of the book through Internet Archive or find purchasing options at Harvard University
Radiometry and the detection of optical radiation - NASA ADS