Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 8
... screen , 248 ; to see through a book or a deal board , 250 . PAGE 192 213 CHAPTER IV . VISUAL PHENOMENA IN OCULAR DIVERGENCE 1. In drowsiness , 252 ; 2. In other modes of producing diver- gence , 255 ; 3. Prevalence of law of ...
... screen , 248 ; to see through a book or a deal board , 250 . PAGE 192 213 CHAPTER IV . VISUAL PHENOMENA IN OCULAR DIVERGENCE 1. In drowsiness , 252 ; 2. In other modes of producing diver- gence , 255 ; 3. Prevalence of law of ...
Página 25
... the hole h of diaphragm d d , will form a diverging pencil , and spread out over the whole circle b ' , on the screen s s . Similarly , the rays from a will с spread out and form the circle a ' , FORMATION OF THE IMAGE . 25.
... the hole h of diaphragm d d , will form a diverging pencil , and spread out over the whole circle b ' , on the screen s s . Similarly , the rays from a will с spread out and form the circle a ' , FORMATION OF THE IMAGE . 25.
Página 26
... screen ; much more , then , would rays from contigu- ous points of the object mix . In such a case , the mixing is so great that no recognizable image is formed at all . FIG . 6 . a b d d B d b As the hole becomes smaller , the circles ...
... screen ; much more , then , would rays from contigu- ous points of the object mix . In such a case , the mixing is so great that no recognizable image is formed at all . FIG . 6 . a b d d B d b As the hole becomes smaller , the circles ...
Página 27
... screen . In the shade of a very thick tree - top the sun - flecks are circular like the sun ; but during an eclipse they are crescentic , or even annu- lar , according to the degree of obscuration . They are always images of the sun ...
... screen . In the shade of a very thick tree - top the sun - flecks are circular like the sun ; but during an eclipse they are crescentic , or even annu- lar , according to the degree of obscuration . They are always images of the sun ...
Página 28
... screen is suitably placed , i . e . , at the exact place where the rays meet . The billions of rays from millions of points of the surface of the object are , as it were , sifted out by the law of refraction , and each safely conveyed ...
... screen is suitably placed , i . e . , at the exact place where the rays meet . The billions of rays from millions of points of the surface of the object are , as it were , sifted out by the law of refraction , and each safely conveyed ...
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Términos y frases comunes
angle axis bacillary layer binocular eye binocular perspective binocular vision camera central spot ciliary muscle circle colors combined images cones corresponding points cross depth of space distant objects distinct double images evident exactly Experiment external images eyes by squinting farther fibers field of view figures finger focal adjustment foreground forms of perspective gaze heteronymously homonymously horizontal horopter identical points impression inches inclination interocular space inverted jects left eye lens less convergence light line of sight look median plane monocular images motion muscles naked eyes nearer nose object or scene oblique observer ocular optic axes optic chiasm optic convergence optic nerve outward parallel perceived perception of depth perfect image perfectly point of sight position projection rays refractive represent retina retinal images right and left right eye rotation sclerotic screen seen single side stereoscope stereoscopic pictures surface tion torsion turn the eyes unite visual lines visual result