Rod lens 6.50 x 50.60
Rod lenses, also called lens rods or cylindrical lenses, are precision optical cylinders. Their one-dimensional function differs from spherical or aspheric lenses: radial curvature converges or diverges light, while the length axis has no optical power and preserves straight propagation. This suits line beams, astigmatism correction, and complex shaping. They are cylindrical refractive lenses with curvature in a two-dimensional plane, following geometrical refraction. Parameters: materials include K9 or BK7 glass, heat-resistant fused silica, and low-cost plastics for volume production; diameter and length determine performance and application; cylindrical surface figure, measured by fringe count N and local error ΔN, affects imaging; Scratch-Dig quality controls scatter and laser damage threshold; visible or NIR AR coatings minimize reflection. Precision grinding or die casting and flexible designs support applications from industry to consumer optoelectronics and ongoing innovation. Tables show selected sizes; custom dimensions and coatings are available.
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