Page:Harold Dennis Taylor - A System of Applied Optics.djvu/9

CONTENTS WITH INDEX TO THE MOST IMPORTANT FORMULÆ
		PAGE
Introduction		1
SECTION I Formulæ of the First Order of Approximation
FORMULA
I.	Reflector. Conjugate Focal Distances	6
II.	Single Surface Refraction. Conjugate Focal Distances	7
III.	Refraction by Thin Lens. Conjugate Focal Distances	10
IV.	Position of First Principal Point of a Thick Lens	14
V.	Position of Second Principal Point of a Thick Lens	17
Va.	Back Focal Length of a Thick Lens	17
VI.	Equivalent Focal Length of a Thick Lens	10
VII.	⁠⁠„⁠⁠„⁠⁠„	17
VIII.	Percentage Variation in Power of a Lens due to Thickness	18
SECTION II
	The Theorem of Elements	20
SECTION III Equivalent Focal Lengths and Principal Points of Thick Lenses and of Lens Systems
IXa.	Position of First Principal Point of a Thick Lens or Pair of Elements, equivalent to Formula IV	26
IXb.	Position of Second Principal Point of a Thick Lens or Pair of Elements, equivalent to Formula V	26