Sight: An Exposition of the Principles of Monocular and Binocular VisionD. Appleton, 1897 - 318 páginas |
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Página 21
... cross at a cer- tain point in the lens . This is called the nodal point . 2. The place of the receiving screen must be exactly at the focal point . 3. The size of the image will be to the size of the object as their relative distances ...
... cross at a cer- tain point in the lens . This is called the nodal point . 2. The place of the receiving screen must be exactly at the focal point . 3. The size of the image will be to the size of the object as their relative distances ...
Página 23
... cross each other in the lens . This point of ray - crossing is called the nodal point . It is a little behind the center of the lens , and about 06 inch ( 15 mm . ) in front of the retina . The size of the retinal image is as much ...
... cross each other in the lens . This point of ray - crossing is called the nodal point . It is a little behind the center of the lens , and about 06 inch ( 15 mm . ) in front of the retina . The size of the retinal image is as much ...
Página 47
... cross of considerable size If the eye is astigmatic , the vertical and horizontal lines are not equally distinct at every distance . At a certain . distance the vertical , and at another the horizontal , line is most distinct ...
... cross of considerable size If the eye is astigmatic , the vertical and horizontal lines are not equally distinct at every distance . At a certain . distance the vertical , and at another the horizontal , line is most distinct ...
Página 48
... cross at f ( Fig . 21 , A ) , while those of the horizontal plane c d will meet at some more distant point , f ' . Now , since the rays of the vertical plane will meet and cross at f , while those of the horizontal plane have not yet ...
... cross at f ( Fig . 21 , A ) , while those of the horizontal plane c d will meet at some more distant point , f ' . Now , since the rays of the vertical plane will meet and cross at f , while those of the horizontal plane have not yet ...
Página 49
... cross , the horizontal line of the cross would be seen perfectly distinctly at f , because there is there no ver- tical blurring , but only horizontal . This would not affect visibly the horizontal , but would render the ver- tical line ...
... cross , the horizontal line of the cross would be seen perfectly distinctly at f , because there is there no ver- tical blurring , but only horizontal . This would not affect visibly the horizontal , but would render the ver- tical line ...
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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