Beam expanding lens

Details Beam expanding lens Beam expanding lens

G - Physics

02

B

G02B 27/09 (2006.01) G02B 3/08 (2006.01) G02B 13/16 (2006.01)

Patent

CA 2162627

A new type of optical element for diverging a laser beam in several directions, for example to produce a relatively uniform cross, has a number of cylindrical segments. Each segment has at least two surfaces, a primary and a secondary surface. The primary surface has a relatively sharp apex and is shaped to conform to a curve defined in a (x,y,z) cartesian coordinate system by the equation Z = Image where z and y are independent of x, c is the curvature at the apex and Q is the conic constant which is less than -1. The element is useful e.g. for precision alignment.

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