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Beam power attenuators

Various attenuator designs for reducing the beam intensity

VARIABLER BREWSTER ATTENUATOR, MOUNTED ON A SYSTEM RAIL

Brief description

  • continuously variable transmission
  • no beam displacement
  • input power up to 100 W

Principle of operation

  • λ/2 plate
  • Brewster polarizer
  • Brewster plate to compensate beam displacement
dimensions (l × w × h) 131 × 95 × 85 mm 
mount dove tail for system rails
beam height 40 mm (when mounted on system rail)
aperture 14 mm
weight 1.8 kg
transmission
  • 95% to 5% for 1064 or 355 nm 
  • 90% to 60% for 1064, 532, 355 or 266 nm 
settling time 100 ms (typically for the transition min. to max. transmission)
beam dump cooling
  • water 
  • air (passive)
Operation
  • with galvanometers integrated in an Elephant scan head 
  • with galvanometers driven via a E-Box
  • with stepper motor and driver

Variable dielectric attenuator

Brief description

  • continuously variable transmission
  • no beam displacement
  • input power up to 100 W

Principle of operation

  • 2 dielectrically coated plates


dimensions (l × w × h) 132 × 80 × 78 mm 
mount dove tail for system rails
beam height 40 mm (when mounted on system rail)
aperture 14 mm
weight 2.2 kg
transmission
  • 90% to 10% for 355 or 266 nm 
    (other wavelengths on request)
settling time 20 ms (typically for the transition min. to max. transmission)
beam dump cooling
  • water 
  • air (passive)
operation
  • with galvanometers integrated in an ELEPHANT scan head 
  • with galvanometers driven via a E-BOX with analog interface 
  • with stepper motor and driver