In his workshop in Padua, Italy, he discovered that plano-convex and plano-concave lenses worked best—that is, lenses with a plane on one side and curved surfaces on the other. Then, drawing on ...
The two types of concave lenses — biconcave and plano-concave — are negative. Meniscus lenses — a third broad type also referred to as convex-concave — can be either positive or negative, depending on ...
The SPC501RAR.S Fused Silica Plano-Concave Lens is made of high purity UV Grade Fused Silica Corning 7980 0A material. It is 12.7 mm diameter plano-concave lens with an effective focal length of -100 ...
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