Cylinders

JML has become recognized as a leader in the cylinder business thanks to our acquisition of Harold Johnson Optical Labs and the subsequent capital expansion adding state of the art equipment. With some of the best capabilities in the industry JML has leveraged it’s speed to market and engineering talent to address several rapid turn prototype requests from customers in addition to it’s existing portfolio of traditional cylinder business.

Why Cylinders?

A cylindrical lens differs from other lenses in the fact that it focuses light into a line and not a point. This is due to the lens having a curved face, or faces, that resemble a section of a cylinder. This means the lens has a radius of curvature in one axis but is flat in the other, which results in image magnification in only one single axis. Cylindrical lenses can be used in medical, defense and other market spaces. They have the benefit of correcting for astigmatism or adjusting the image height of the image.

Manufacturing Our Cylinders

With it’s new equipment through expansion, as well as the legacy equipment, JML uses traditional fabrication techniques combined with more advanced metrology and CNC machines to fabricate highly engineered cylinders.

There are many different types of cylinder shapes including, anamorphic, plano-concave, plano-convex, sphero-cylindrical and bi-cylinder.

Cylindrical Optics

  • Types of Cylinders: singlets, doublets, triplets, anamorphic, plano-concave, plano-convex, sphero-cylinderical, symmetric-convex, symmetric concave
  • Sizes: 3mm-635mm
  • Material Types: all the optical glass, fused silica, and quartz
  • Volumes: Prototype to Production Quantities
ParameterIndustry Precision ToleranceJML Precision
Surface Flatness (waves)1/21/10
Dimensional (mm)+0.00/-0.025+/-0.010
Thickness (mm)+/-0.05+/-0.025
Centration (Total Included Angle in ARC Minutes)1.00.5
Wedge (ARC Minutes)10.5
Axial Twist (Arc Minutes)21
Scratch-Dig40-2020-10

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