Sight: An Exposition of the Principles of Monocular and Binocular VisionKegan Paul, 1881 - 275 páginas |
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Página 26
... becomes smaller , the circles of dispersion , a ' b ' c ' , become smaller in the same proportion ; and , therefore , the light from different points of the object is more and more separated on the receiving screen , and the image becomes ...
... becomes smaller , the circles of dispersion , a ' b ' c ' , become smaller in the same proportion ; and , therefore , the light from different points of the object is more and more separated on the receiving screen , and the image becomes ...
Página 32
... become a cd ; this is called refraction . But also the different colors are unequally bent ; red is bent least and violet most , the other colors lying between these extremes ; thus they are spread out over a considerable colored space ...
... become a cd ; this is called refraction . But also the different colors are unequally bent ; red is bent least and violet most , the other colors lying between these extremes ; thus they are spread out over a considerable colored space ...
Página 39
... becomes small , and a large portion of the light is shut out . When the light diminishes , as in twilight , the circular fibers relax , the previously stretched radi- ating fibers contract by elasticity , and enlarge the pupil . At ...
... becomes small , and a large portion of the light is shut out . When the light diminishes , as in twilight , the circular fibers relax , the previously stretched radi- ating fibers contract by elasticity , and enlarge the pupil . At ...
Página 43
... becomes smaller , shows that this anterior surface becomes more convex . By careful ex- amination the iris , too , may be seen to protrude a little FIG . 19 . This b а F N F , lens adjusted to distant objects ; N , to near objects ; a ...
... becomes smaller , shows that this anterior surface becomes more convex . By careful ex- amination the iris , too , may be seen to protrude a little FIG . 19 . This b а F N F , lens adjusted to distant objects ; N , to near objects ; a ...
Página 44
... becomes more convex . But the question , " How is this done ? " is more difficult to answer . Helmholtz thinks it is done in the following manner : * It will be remembered that the lens is invested by a thin , transparent membrane ...
... becomes more convex . But the question , " How is this done ? " is more difficult to answer . Helmholtz thinks it is done in the following manner : * It will be remembered that the lens is invested by a thin , transparent membrane ...
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Términos y frases comunes
angle axis bacillary layer binocular eye binocular perspective binocular vision camera central spot Cheaper Edition ciliary muscle Cloth colors combined images cones corresponding points cross Demy 8vo diagram direction distance distant objects distinct divergence double images evident Experiment external images farther Fcap fibers field of view Frontispiece Helmholtz heteronymous horizontal horopter horopteric line Illustrations impression inches inclination interocular space jects Large post 8vo left eye left-eye image lens light line of sight look median line monocular motion muscles nearer nose observer ocular optic axes optic centers optic chiasm optic nerve outward parallel perception perfectly phenomena plane Poems point of sight Portrait position price 75 Prof projection rays refractive represent retina retinal images right eye rotation sclerotic screen Second Edition seen single Small crown 8vo stereoscope surface T. H. HUXLEY Third Edition tion torsion Translated vertical meridian vibrations visual lines visual result vols
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