Linear deiverging lens
First Claim
Patent Images
1. An optical lens having at least two surfaces, the primary surface and the secondary surface, the primary surface having a relatively sharp apex and being shaped to conform to a curve defined in a (x,y,z) cartesian coordinate system by the following equation ##EQU3## where y and z are independent of x, c is the curvature at the apex and Q is the conic constant in that the magnitude of the product, Q·
- c, lies between 0.25 and 50 mm-1 and Q is less than -1.
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Abstract
A new type of lens is described. The lens has the appearance of a prism with a relatively sharp radius at the apex. This lens finds an application in expanding a laser beam in one direction only.
190 Citations
12 Claims
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1. An optical lens having at least two surfaces, the primary surface and the secondary surface, the primary surface having a relatively sharp apex and being shaped to conform to a curve defined in a (x,y,z) cartesian coordinate system by the following equation ##EQU3## where y and z are independent of x, c is the curvature at the apex and Q is the conic constant in that the magnitude of the product, Q·
- c, lies between 0.25 and 50 mm-1 and Q is less than -1.
- View Dependent Claims (2, 3, 4)
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5. A laser beam expander for expanding a laser beam in one direction, comprising:
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a source of the said laser beam; and an optical lens having an apex and located relative to the source so that the apex is in the laser beam;
in thatthe optical lens has at least two surfaces, the primary and the second surfaces; the said primary surface containing the said apex and being shaped to conform to a curve defined in a (x,y,z) cartesian coordinate system by the following equation;
##EQU4## where y and z are independent of x, c is the curvature at the apex and Q is the conic constant in that the magnitude of the product Q·
c, lies between 0.25 and 50 mm-1 and Q is less than -1. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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Specification