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Main features

    • Highest beam pointing stability (< 0,1 mrad)
    • All-in-one design with integrated controller
    • Two lenses simultaneous movement assuring no misfocus
    • Absolute encoder (both lenses)
    • Adjustment time <1s (all magnifications)
    • Fused silica optical elements
    • No homing after switching on/off
    • Diffraction limited performance for all magnifications


Application examples

  • Precise laser micromachining
  • Life sciences
  • Research




Motorized laser beam expanders MEX series are used to increase the laser beam diameter and adjust divergence. Standard or custom-made beam expanders feature a unique mechanical closed-loop sliding-lens design ensuring high pointing stability and minimal dimensions.

These variable magnification (zoom) beam expanders and reducers are designed for the required wavelength and each type of our beam expanders has motorized divergence adjustability.

What’s in the box?


  Motorised laser beam expander MEX

  USB key with software and manual

  Power supply DC 12V

  USB (1.5 m) cable



Motorized laser beam expander specifications
OPTICAL Magnification ranges MEX18 – 1,0x – 8,0x, MEX13 – 1,0x – 3,0x
Clear input aperture ⌀11,5 mm
Clear output aperture MEX13 – ⌀23 mm, MEX18 – ⌀38 mm, MEX18-ACH – ⌀23 mm
Optical element number 3 (MEX18, MEX13), 4 (MEX18-ACH)
LIDT coating >10 [J/cm2] (10 ns @ 1064 nm)
Pointing stability during lens movement  
Adjustment time MIN to MAX magnification and divergence  
Available coatings 1064 nm, 1030 nm, 532 nm, 515nm, 355 nm, 343 nm, custom
MECHANICAL MEX13 mechanical dimensions 140 x 45 x 45 mm
MEX18 mechanical dimensions 237 x 45 x 45 mm
MEX18-ACH mechanical dimensions 226 x 45 x 45 mm
Housing material Anodized aluminum
ELECTRONIC Communication Using ASCII commands described in manual
Software interface BDS software
Input voltage DC 12 V
Control interface USB, RS232, Ethernet (using an additional adapter)
CONDITIONS Operating temperature, Celsius 10 to 40
Mounting holes M4 on the bottom side

For more information