Lens Array Homogenisers

Lens Array Homogenizers

Description

PowerPhotonic’s lens array homogenizing beamshapers use a unique freeform direct-write process to fabricate customized lens array surfaces in fused silica. 

These lens array homogenizers are carefully designed to produce flat-top spots at the focus of a lens; simultaneously maximizing performance and efficiency.  The lens can be made concave to eliminate inter-system focal planes or even toroidal to produce rectangles while maximizing efficiency.

Lens array homogenizers can be used to create line, square, rectangular and hexagonal intensity distributions specific to an application, while remaining highly insensitive to beam alignment and input distribution.  The lens arrays can either be used in a single array or dual “fly’s eye” configuration to balance the performance and cost of any application.

Product Data Sheet

Key Features

  • All fused silica optics
  • Customizable spot size
  • Customizable spatial distributions
  • Variable edge steepness
  • Low divergences achievable
  • Suitable for multi-mode lasers (M2 >10)
  • Toroidal design available for rectangular spots
  • Concave design available for high power

Benefits

  • Highest system efficiency possible >98%
  • Dramatic increase in beam uniformity
  • High power handling, >20kW CW
  • High laser damage threshold, >100J/cm2
  • No focal plane shift
  • Good through-focus performance
  • Insensitive to input beam properties

Target Applications

  • Materials processing: high power
    • Laser welding, brazing and cladding
    • Laser peening and annealing
    • Laser cutting
    • Metal polishing
  • Pump beam homogenization

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