Production Path

Preferred Dimension Cylinders

Through CNC manufacturing and innovative tooling, Kreischer Optics can produce any plano-convex cylindrical lens within the ranges listed here.

Turn-around time in as little as 1 week!

Click for a list of preferred dimension Plano-Convex Cylinders

Custom Cylinders

Any Shape
  • Plano-convex or concave
  • Bi-convex or concave
  • Meniscus
  • Crossed cylindrical axis
  • Cemented cylindrical doublets & triplets
  • Precision rods and semi-rods
  • Radii from 3mm to infinity
  • Lengths (axial) to 650mm (25.6")
  • Widths (or diameters) to 10"
  • Surface accuracies to 1/10-wave irregularity
Quality Control
  • Interferometrically tested
  • Surface qualities to 10-5
  • Prototype to production quantity

Standard Tolerances

Length (axial direction): +/- 0.10mm
Width (power direction): +- / -0.10mm
Center thickness: +/- 0.15mm
Radius: +/- 0.20%
Focal length: +/- 0.25%
Surface figure: (max. irr. @ 633nm)
  • 4-wave per 10mm
  • 2-wave
Surface quality: 60/40
Wedge: 0.025mm maximum edge thickness difference

Note: Tighter tolerances can be achieved at an increased cost.

Precision Rods and Semi-Rods

Ideal for shorter focal length lenses are the use of precision polished rods, which can be cut down to form plano-convex sections (semi-rods). BK-7 rod blanks are kept in stock, per the table below, but other glass types and dimensions are available.

Click to view Precision Rods & Semi-Rods Specifications
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