Sight: An Exposition of the Principles of Monocular and Binocular Vision |
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Página 32
... also , the images made by such a lens will be edged with color . Thus the light
from the radiant a ( Fig . 10 ) , being white light , is dispersed ; the violet rays ,
being more bent , reach a focus at a ' , same as for the central rays , but nearer .
... also , the images made by such a lens will be edged with color . Thus the light
from the radiant a ( Fig . 10 ) , being white light , is dispersed ; the violet rays ,
being more bent , reach a focus at a ' , same as for the central rays , but nearer .
Página 35
... with the central portions ; an excess increasing with the distance from the
center ; therefore the focal point for marginal rays is not the FIG . 12 . r a r a
common focal point for all the rays , and therefore. same as for the central rays ,
but nearer .
... with the central portions ; an excess increasing with the distance from the
center ; therefore the focal point for marginal rays is not the FIG . 12 . r a r a
common focal point for all the rays , and therefore. same as for the central rays ,
but nearer .
Página 41
In the camera , for example , when the object comes nearer , we draw out the
tube so as to carry the ground - glass plate a little farther back ; when the object
recedes , we slide up the tube so as to bring the receiving plate nearer the lens .
In the camera , for example , when the object comes nearer , we draw out the
tube so as to carry the ground - glass plate a little farther back ; when the object
recedes , we slide up the tube so as to bring the receiving plate nearer the lens .
Página 47
It has but one limit , viz . , the nearer limit of five inches . Now in the passive state
of the eye , as for instance in gazing on vacancy , or when the eye is taken out of
the socket as a dead instrument , it is prearranged for perfect imageof objects at ...
It has but one limit , viz . , the nearer limit of five inches . Now in the passive state
of the eye , as for instance in gazing on vacancy , or when the eye is taken out of
the socket as a dead instrument , it is prearranged for perfect imageof objects at ...
Página 48
The eye then adjusts itself to all nearer distances , and becomes in all respects a
normal eye . From the nature of the defect ( structural defect ) , it is evident that
the glasses must be worn habitually . Presbyopy , or Old - Sightedness .
The eye then adjusts itself to all nearer distances , and becomes in all respects a
normal eye . From the nature of the defect ( structural defect ) , it is evident that
the glasses must be worn habitually . Presbyopy , or Old - Sightedness .
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adjustment already angle appear becomes binocular called central spot circle Cloth colors combined complete condition cones convergence corresponding points cross Demy 8vo diagram direction distance distinct double images evident exactly Experiment explained external fact fall farther Fcap field of view figures front hand horizontal horopter Illustrations impression inches inclination increasing Large layer left eye lens less light look median middle motion move muscles natural nearer necessary nerve nose object observer opposite optic optic axes outward parallel passing perception perfect perfectly perspective phenomena plane Poems point of sight position post 8vo price 35 primary produced projection rays referred represent result retina retinal images right eye rotation screen Second Edition seen shown side single Small crown 8vo space stereoscope surface Third tion Translated true turn unite vertical vision visual lines vols wall whole
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Información bibliográfica
| Título | Sight: An Exposition of the Principles of Monocular and Binocular Vision Volumen33 de Internat. sci. series International scientific series |
| Autor | Joseph LeConte |
| Editor | D. Appleton, 1881 |
| Procedencia del original | Universidad de Oxford |
| Digitalizado | 7 Sep. 2006 |
| Largo | 275 páginas |
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