Convex Lens
A lens in which the principal optical surface bulges outwards.
Conversion lens ...
Convex lens
Simple lens, or lens shape within a compound lens, whose surfaces curve outward. Such a lens causes rays of light passing through it to converge.
(see Compound lens) ...
Convex lens
A simple lens which causes rays of light from a subject to converge and form an image.
Cool colours
Blue, purple, and brown.
-Bi-convex lens - simple lens shape whose surfaces curve outward, away from the optical center. Such a lens causes light rays to converge.
Plano-convex Lens
A lens used to focus light rays. It is flat one side, convex (curved outward) on the other. Also see: Fresnel.
This means rays of light passing through will bend toward the center of the lens on entry. In a double convex lens, such as a magnifying glass, the light will bend when it exits as well as when it enters.
The meniscus lens, superior to the bi-convex lens, improved the quality of the the projected images.
Positive numbers are convex lenses, concave lenses have negative dioptric values.
The camera obscura is an instrument consisting of a darkened chamber or box, into which light is admitted through a convex lens, forming an image of external objects on a surface of paper or glass, etc., placed at the focus of the lens.
Converging lens
see Convex lens.
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More Photographic Terms ...
 See also: Lens, Focus, Camera, Photograph, Photography
  
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