Lenses are used in all optical instruments, like microscopes, telescopes, cameras, projectors etc. It is also of two type’s concave and convex lens.

Parallel rays entering a convex lens converge on a point on the other side of the lens. However, when parallel rays enter a concave lens, they diverge, or spread out, on the other side of the lens.

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Drawing upon its uniquely stable manufacturing environment - Optical Surfaces Ltd. routinely produces the highest quality concave spherical mirrors for Schlieren Imaging systems in a range of ...