Scientific American, Volum 235Munn & Company, 1976 |
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Side 72
... lens can be compared DR to playing chess . In chess a play- er tries to trap his opponent's king in a series of moves . In creating a lens a lens designer attempts to " trap " light by forcing all the rays arising from creations more ...
... lens can be compared DR to playing chess . In chess a play- er tries to trap his opponent's king in a series of moves . In creating a lens a lens designer attempts to " trap " light by forcing all the rays arising from creations more ...
Side 77
... lens to the point where a ray enters the lens , traveling parallel to the axis , is equal to the focal length of the lens times the sine of the angle the ray makes with the axis at the point of focus [ see illustration at bottom right ...
... lens to the point where a ray enters the lens , traveling parallel to the axis , is equal to the focal length of the lens times the sine of the angle the ray makes with the axis at the point of focus [ see illustration at bottom right ...
Side 80
... lens configurations shown here are both f / 1.9 and yield images of equivalent quality . In the six - element Gaussian lens the re- fractive index of the elements ranges from 1.6 to 1.75 . In the four - element Tessar lens the re ...
... lens configurations shown here are both f / 1.9 and yield images of equivalent quality . In the six - element Gaussian lens the re- fractive index of the elements ranges from 1.6 to 1.75 . In the four - element Tessar lens the re ...
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