An "Average Eye" For Heterochromatic Photometry (Classic Reprint)
Language: English
Published by Forgotten Books, 2018
- Softcover
- New
Seller: Forgotten Books, London, United KingdomForgotten Books
AbeBooks seller since June 2, 2021
Condition: New
£ 13.08
Quantity: Over 20 available
Add to basketItem description from seller
Print on Demand. This book investigates the human eye's capacity for distinguishing between colors, especially yellow and blue, and how the differences in human perception can lead to different photometric measurements. The author explores both icker and Lummer-Brodhun photometers and determines which is best suited to take accurate photometric measurements. The author discusses the characteristics of a "normal" observer and how to select observers for accurate measurements. The author concludes that the icker photometer, used under specific conditions, provides the most certainty and reduces the labor needed to attain accurate results. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book.
Seller Inventory # 9781333935078_0
- Title
- An "Average Eye" For Heterochromatic Photometry (Classic Reprint)
- Author
- E. C. Crittenden, F. K. Richtmyer
- Publisher
- Forgotten Books
- Publication year
- 2018
- Condition
- New
- Book Type
- print-on-demand item
- Binding
- Paperback
- Language
- English
- ISBN 10
- 1333935072
- ISBN 13
- 9781333935078
- Seller catalogs
- Electronics
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
"Synopsis" may belong to another edition of this title.
Forgotten Books
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Forgotten Books’ Classic Reprint Series utilizes the latest technology to regenerate facsimiles of historically important writings. Careful attention has been made to accurately preserve the original format of each page whilst digitally enhancing the quality of the aged text.
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FB &c Ltd
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Forgotten Books publishes hundreds of thousands of rare and classic books.
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
This text has been digitally restored from a historical edition. Some errors may persist, however we consider it worth publishing due to the work's historical value.
The digital edition of all books may be viewed before purchase if you request a sample.
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