A Treatise on Optics |
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Page v
... 51 ; after reflexion at a spherical surface , 52 ; after refraction at a spherical surface , 53 ; Least circle of aberration , its formation , position and dimensions , 55 , 56 . 337 CHAPTER IV . Focal Lines of small oblique pencils ,
... 51 ; after reflexion at a spherical surface , 52 ; after refraction at a spherical surface , 53 ; Least circle of aberration , its formation , position and dimensions , 55 , 56 . 337 CHAPTER IV . Focal Lines of small oblique pencils ,
Page vi
... least con- fusion , 62-64 ; Illustration of geometrical and visible image , 65 ; Posi- tion of the Foci of a small oblique pencil after reflexion at a spherical surface , 66 ; the same after refraction at a plane or spherical surface ...
... least con- fusion , 62-64 ; Illustration of geometrical and visible image , 65 ; Posi- tion of the Foci of a small oblique pencil after reflexion at a spherical surface , 66 ; the same after refraction at a plane or spherical surface ...
Page 44
... Least Circle of Aberration . 55. Let AF be the axis of a pencil of rays reflected or refracted directly at a spherical surface ; Hr , hr the extreme rays in any plane section of the pencil through the axis , k M which meet in the point ...
... Least Circle of Aberration . 55. Let AF be the axis of a pencil of rays reflected or refracted directly at a spherical surface ; Hr , hr the extreme rays in any plane section of the pencil through the axis , k M which meet in the point ...
Page 45
... Least Circle of Aberration of the directly reflected or refracted pencil . Obs . In the preceding figure , the aberration is supposed to be towards the surface ; the student will have little difficulty in drawing a corresponding figure ...
... Least Circle of Aberration of the directly reflected or refracted pencil . Obs . In the preceding figure , the aberration is supposed to be towards the surface ; the student will have little difficulty in drawing a corresponding figure ...
Page 46
... least of the order y " , - therefore y'.mt and y.mt may be neglected . Also the difference between Ar and As being the difference of the aberrations of the two rays Hr , Ks , is of the order y " : and therefore when multiplied by mt we ...
... least of the order y " , - therefore y'.mt and y.mt may be neglected . Also the difference between Ar and As being the difference of the aberrations of the two rays Hr , Ks , is of the order y " : and therefore when multiplied by mt we ...
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Common terms and phrases
aberration achromatism angle of incidence axis QA bright centre circle of least coincides colours concave conical surfaces convex lens cos² Crown 8vo cuts the axis deviation diameter direct pencil distance emergent equation excentrical eye-glass eye-piece Fcap field of view fixed lines focal length geometrical focus Hence illumination image formed incident directly incident pencil index of refraction intersection lenses luminous point magnifying power medium object object-glass parallel rays passes pencil of parallel pencil of rays pencil whose axis perpendicular plane surface point of incidence point q position primary plane principal focus principal plane prism radius rays incident reflected or refracted reflected pencil reflexion or refraction refracted rays refracting angle refracting surface refractive index shew small oblique pencil small pencil spectrum sphere spherical reflector spherical surface subtends supposed telescope thin lens v₁ v₂ αμ
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