double-convex lens

double-convex lens

[¦dəb·əl ¦kän‚veks ′lenz]
(optics)
A lens having surfaces that are adjacent portions of intersecting spheres whose centers lie on opposite sides of the plane of the lens. Also known as biconvex lens.
References in periodicals archive ?
My 10-inch reflector at 299x reveals a dozen stars gathered into a shape that resembles a double-convex lens.
NGC 1386 isn't in either of the drawn fields, but in the 10-inch scope it's a nicely elongated galaxy, shaped much like a double-convex lens about 2 1/2' long.
Through my 10-inch scope at 187x, the halo is shaped much like a double-convex lens.