A combining form meaning "flat, plane," used in the formation of compound terms. Also plani- and plan- before a vowel, → plane.
adasi-ye taxt-kâv (#)
Fr.: lentille plano-concave
A → divergent lens composed of one concave surface and one plane surface. This type of lens has a negative focal point and produces a → virtual image.
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.