An "Average Eye" For Heterochromatic Photometry, and a Comparison of a Flicker and an Equality-of-Brightness Photometer (Classic Reprint) - Softcover

Inhaltsangabe

Direct comparison of flicker and equality-of-brightness photometers, using many observers to define an average eye

This study examines how two common photometry methods compare when measuring color differences and lamp intensities. The author records readings from a large group of observers to establish average values and investigate how individual differences affect results. The work combines careful apparatus setup with practical tests on incandescent lamps and blue color solutions, aiming to improve accuracy in color-difference measurements. In accessible terms, the book shows how measurements shift with observer variation and method choice. It also discusses reproducibility, field sizes in the photometers, and how to interpret differences between flicker-based readings and brightness-match readings in real-world lighting work.

• How two photometers differ in practice for color-difference measurements
• How observer variability influences reported transmissions and lamp comparisons
• Details on setup, calibration, and data interpretation to improve measurement reliability
• Guidance on applying correction curves to align results across observers

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