plano-convex


Also found in: Dictionary, Wikipedia.

plano-convex

A shape of sun-dried brick, flat on one side, convex on the other, typical of early Mesopotamian construction.
References in periodicals archive ?
b A pair of plano-convex lenses with plano surfaces bonded together
d A plano-concave lens bonded to a plano-convex lens
The simple plano-convex lens can easily be made from a piece of green float glass where it is only necessary to grind a very shallow front curve and a rear surface reasonably flat; the lens does not have to be test plated or figured as a good polish and careful grinding is all that is necessary.
Total quantity or scope: Lot 1 large spherical lens diameter plano-convex (Qty 3).
Later research into this effect revealed a surprising result, that is, the high reduction of the chromatic aberration of a single plano-convex objective lens by placing an achromatic doublet lens at some position along the focal length, and inside the prime focus itself.
The same trend is seen in the following Early Dynastic period with plano-convex bricks.
Lenses used in collimators include GRIN, C-lenses, aspheric, achromatic, plano-convex, ball and biconvex lenses.
Those in room XXIX, a long narrow room in the east corner of the temple, revealed three earlier building phases which followed the uppermost (Kassite period) walls, while in the lowest level a plano-convex mud brick wall crossed the room on a diagonal, suggesting a different plan in the third millennium.