Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
Dentro del libro
Resultados 1-5 de 33
Página 47
... horizontal lines are not equally distinct at every distance . At a certain . distance the vertical , and at another the horizontal , line is most distinct . Explanation . - The cause of this defect is difficult to explain in popular ...
... horizontal lines are not equally distinct at every distance . At a certain . distance the vertical , and at another the horizontal , line is most distinct . Explanation . - The cause of this defect is difficult to explain in popular ...
Página 48
... horizontal . Supposing the vertical curvature the greatest ( the most usual case ) , the vertical plane of rays a b will meet and cross at f ( Fig . 21 , A ) , while those of the horizontal plane c d will meet at some more distant point ...
... horizontal . Supposing the vertical curvature the greatest ( the most usual case ) , the vertical plane of rays a b will meet and cross at f ( Fig . 21 , A ) , while those of the horizontal plane c d will meet at some more distant point ...
Página 49
... horizontal plane at f ; then it becomes more and more elliptical until its section is a small circle at ƒ " ; then ... horizontal line of the cross would be seen perfectly distinctly at f , because there is there no ver- tical blurring ...
... horizontal plane at f ; then it becomes more and more elliptical until its section is a small circle at ƒ " ; then ... horizontal line of the cross would be seen perfectly distinctly at f , because there is there no ver- tical blurring ...
Página 95
... horizontal line n n represents the extent of the visible spectrum . The places of the spectral colors are represented by the vertical lines from the letters R , Or , Y , Gr , Bl , V. The vertically lined space represents the affections ...
... horizontal line n n represents the extent of the visible spectrum . The places of the spectral colors are represented by the vertical lines from the letters R , Or , Y , Gr , Bl , V. The vertically lined space represents the affections ...
Página 107
... horizontal direction the field of view of both eyes is more than 180 ° . Now , there being two retina , there are of course two retinal images of every external object ; and since retinal images are projected outward into space as ex ...
... horizontal direction the field of view of both eyes is more than 180 ° . Now , there being two retina , there are of course two retinal images of every external object ; and since retinal images are projected outward into space as ex ...
Otras ediciones - Ver todas
Términos y frases comunes
adjustment angle axis bacillary layer becomes binocular eye binocular perspective binocular vision blind spot camera central spot ciliary muscle circle colors combined image concave corresponding points cross defect depth of space distance distant objects distinct divergence double images evident exactly Experiment explained external images farther fibers field of view focal fore fovea Helmholtz heteronymous homonymous horizontal horopter horopteric line Illustrations impression inches inclined interocular space left eye left-eye image lens light line of sight look median plane middle monocular motion muscles nearer normal eye nose oblique observer ocular optic axes optic chiasm optic nerve optic vesicle outward parallel perceived perception perfectly phantom phenomena point of sight position primary projection pupil ray-line rays refractive represent retina retinal images right and left right eye right-eye image rotation sclerotic screen seen single sensation side stereoscope surface tion torsion turn the eyes vergence vibrations visual lines visual result