Laser Beam Expander
The off-axis Beam Expander with three tremendous advantages...
  • Off-axis design produces no centre obscuration and efficient transmission is obtained, limited only by the reflectivity of the mirrors. Alignment aids are provided to ensure correct beam pointing.

  • The reflective design is achromatic and with aluminium coatings can operate from UV to far IR without adjustment. The wavelength of the operation is unaffected by the mirror substrate materials. Mirrors are OS Ltd precision quality with lambda/10 surface accuracy.
  • The off-axis design is housed in a convenient box assembly with provision for fixing to an optical table. Primary mirrors are interchangeable but should be interferometrically aligned. An interferogram and OPD map is supplied with every expander manufactured by Optical Surfaces Limited.




















Magnification available:x5, x10, x15, x20
Output Aperture:100mm, 120mm, 150mm, 200mm
Standard coatings:Protected Aluminium
Focus and Collimation:Factory interferometrically pre-set but may be adjusted by technician
Mirrors:Secondary : Aspheric from zero expansion glass.
Primary: Matching spheric from zero expansion glass.
Lambda/10 surface accuracy.
Transmitted Wave front Distortion:lambda/4 p-v at 633nm.
Overall Dimensions:approx. 850x310x250 dependent on model chosen.

DATA SHEETS pdf
• Laser Beam Expander

Other Options Available:
  • Ultra-hard laser coatings.
  • Protected silver and gold coatings.
  • Concave/concave design with off-axis paraboloids and internal focus.
  • Larger apertures built to order.
  • Expansion up to x 100 if required.
  • Variable expansion and interchangeable expansion units can be supplied.
  • Temperature compensation using Invar.
  • Vertical or Horizontal beam separation.
  • Vacuum compatible.