Illumination And Photometry

 
9781408613771: Illumination And Photometry

ILLUMINATION AND PHOTOMETRY - 1910 - PREFACE - THE preparation of this volum w as undertaken with a view to providing an adequate test-book of the suhject for the use of colleges of engineering. It isnot intended to be a handbook of technical data nor a nlanual of practical instructions. Emphasis is therefore given to the scientific basis of the subject and to methods of rational analysis rather than to the description of processes of manufacture, structural details and prevailing practice. A condensed form of trentnlent has been sought throughout. In the work of instruction nuch of the su1, jectm t t e r may profitably be amplified by lectures, supplementary reading ancl the 1-orking out of problems. Familiarity IT-ith the technique of photometry should be sought in the laboratory in connection n-ith such a course. The material herein contained to a large extent represents the basis of a course in Illun ination and Photometry given by the University of Wisconsin, and the author ackno ledgesn ith pleasure much helpful encouragement and many suggestions from Prof. RIurray C. Beebe of that institution - CONTENTS - CHAPTER - I. TEE PRODUCT A I N O D N P ROPAGAT O IO F N LI GHT . .................... CHAPTER 11. CONCEPTS, U NITS AND TERMINOLOGY . . . . .......................... CHAPTER 111. STANDARDLU MINOUSS OURCES. . . ................................. CHAPTER IV. TEE PRINCIPLE OF S VISION.. .................................... CHAPTER V. THE REPRESENTATIO A N N D CALCULATIO O N F PHOTOJIET Q R U I A C N TITIES CHAPTER VI. PHOTO UEDTERVIICC ES AND THEIR IANIPULAT . I . O . N .. . . . .......... CHAPTER VII. PORTABL PH E OTOMET A E N R D S I LLUYINOJIE . T . E .. R .. S .. . ........... CHAPTER VIII. INTEGRATPIHNOGT OJIET . E .. R .. S . ................................ CHAPTER IX. INCANDESCELEENCTT RILCA MPS .. ................................ CHAPTER X. TEE ELECTRI A C R C AND THE VACUUJIT UBE . ...................... CHAPTER XI. ILLUJ INA B T Y I G O A N S. . . ........................................ vii CONTENTS CHAPTER XII. ACCESSORDYE VICE F S O R ILLU INA . N . T .. S . ....................... P l A 4 G 1 E CHAPTER XIII. THE CALCULATIO AN N D REPRESENTATI O O F NI LI, U MINAT . I . O . N . . . . . . 150 CHAPTER XIV. ENGINEERIN AN G D ECONOMPICR INCIPLE IN S IXTERIOIRL LUMINATION1.0 1 CHAPTER XV. EXTERIOLRI GHTIN . G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l70 APPENDIX. TABLES A ND CHART T S O FACILITATIEL LUMINATI A O N N D PHOTOMETRIC CALCULATIO . . N . S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177 ILLUMINATION AND PHOTOMETRY CHAPTER I. THE PRODUCTION AND PROPAGATION OF LIGHT. Light defined.-The term Eight is employed in two senses, viz., subjectively, to denote the sensation characteristic of the retina of the eye, and objectively, to denote the physical cause of that sensation. These two uses are to be regarded as supplementary rather than contradictory. For the purposes of this work light may be considered as a physical phenomenon of the ether, measured in terms of the visual sensation which it is capable of exciting. Radiation.-A body may dissipate its molecular energy by three processes, conduction, convection and radiation. The two former result from intimate contact with some other body at a lower temperature...

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