Fr.: lentille biconvexe
A → spherical lens with two convex faces. The radii of curvature for the two surfaces may or may not be the same.
adasi-ye kâv-kuž (#)
Fr.: lentille concavo-convexe
A type of → convergent lens that is concave on one surface and convex on the opposite surface. Also called → meniscus lens. Meniscus lenses are used most often in conjunction with another lens to produce an optical system of a longer or shorter → focal length than the original lens.
adasi-ye kuž (#)
Fr.: lentille convexe
A lens that converges an incident beam of light to a focus.
→ convex; → lens.
adasi-ye taxt-kuž (#)
Fr.: lentille plano-convexe
A → convergent lens that has one flat side and one convex side. Plano-convex lenses focus parallel rays of light to a positive point, thus forming → real images.