Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1881 - 275 páginas |
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Página 28
... angle of divergence , so that they all meet at the same point , b ' . Similarly all the rays proceeding from a , and falling on the lens , are brought to the same point , a ' , and from c to the point c ' , and so also for every ...
... angle of divergence , so that they all meet at the same point , b ' . Similarly all the rays proceeding from a , and falling on the lens , are brought to the same point , a ' , and from c to the point c ' , and so also for every ...
Página 67
... angle to the point impressed , and therefore to the opposite side of the field of view . These colored spectra have been called phos- phenes . Experiment 3. Musca Volitantes . — If we gaze on a white wall or ceiling , or , still better ...
... angle to the point impressed , and therefore to the opposite side of the field of view . These colored spectra have been called phos- phenes . Experiment 3. Musca Volitantes . — If we gaze on a white wall or ceiling , or , still better ...
Página 84
... angles , or nearly at right angles , to the impressed surface , and therefore upward ; and radiants below the horizon , on the ground , impress the upper half of the retina and are referred downward . Comparison with Other Senses ...
... angles , or nearly at right angles , to the impressed surface , and therefore upward ; and radiants below the horizon , on the ground , impress the upper half of the retina and are referred downward . Comparison with Other Senses ...
Página 169
... at right angles to the line of sight , and therefore is free from any suspicion of error from projection . Standing in the open air before a vertical flag - staff , I gaze upon it steadily until LAWS OF PARALLEL MOTION . 169.
... at right angles to the line of sight , and therefore is free from any suspicion of error from projection . Standing in the open air before a vertical flag - staff , I gaze upon it steadily until LAWS OF PARALLEL MOTION . 169.
Página 170
... sky , is the proper surface of projection . Evidently , also , the meridians and parallels everywhere at right angles to each other are the true coördinates wherewith to com- pare 170 DISPUTED POINTS IN BINOCULAR VISION .
... sky , is the proper surface of projection . Evidently , also , the meridians and parallels everywhere at right angles to each other are the true coördinates wherewith to com- pare 170 DISPUTED POINTS IN BINOCULAR VISION .
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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