Two methods of lighting have been employed—the Catoptric and the dioptric systems.
In order to complete the dioptric apparatus a lens is necessary.
We have (with the consent of the author) altered these to the dioptric system.
In fishes and reptiles, as Owen has remarked, "The range of gradation of dioptric structures is very great."
A new lantern and dioptric apparatus were erected on the tower in 1902.
The unit of power employed by spectacle-makers is termed the diopter or dioptric (see Spectacles).
A dioptric apparatus for the purpose of forming an image on the sensory cells.
Another classification divides the instruments themselves into three classes: (a) catoptric, (b) dioptric and (c) catadioptric.
This optic embodied the first combination of dioptric and catoptric elements in one design (fig. 34).
Mercury rotation; univalve 164 in azimuth, with 164 dioptric mirror in rear.
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dioptric Relating to the refraction of light, especially by a lens. Dioptric lenses are used in Fresnel lenses and camera viewfinders. Compare catadioptric, catoptric. |
