Variable Zoom Beam Expander

For applications where the exact expansion ratio required is not known, Special Optics offers both manual and motorized zoom beam expanders. Our proprietary diffraction limited 5-element design, allows for continuous expansion selection from 1X to 4X and from 2X to 8X.  Fused silica lenses are used on the two input groups to allow for high damage thresholds.  Both expansion ratio and focus can be controlled independently so that diffraction limited performance can be maintained at any single wavelength from 488-1300nm.

Special Optics Variable Zoom Beam Expanders are ideal to compensate for varying optical path lengths. They allow you to match the beam diameter of the laser to the aperture of the optical system. They typically employ a proprietary 5 lens-element design with 3 lens groups to reduce the internal focus and use fused silica lenses on the two input groups.  As a result, our zoom beam expanders tolerate a very high damage threshold.

With Special Optics zoom laser beam expanders, variable magnification levels can easily be set ranging from 2X-8X, 2X-10X, 1X-4X, and 1X-5X.  This variability makes Special Optics Beam Expanders ideal for easier set ups on OEM machines, provides flexibility to equipment and are ideal for general laboratory research. 

Choose from VIS, IR, or UV variable beam expanders.

Features
  • Diffraction-limited design
  • 5 element design reduces internal focus
  • Continuous zoom and focus adjustments
  • Mechanicals specifically designed to minimize beam wander
  • Reduce machine setup times
SPECS
  • Coating Damage Threshold
    100 MW/cm2
  • Transmission
    > 97%
  • Useable Spectral Range
    450 - 1100 nm
  • Wavefront Distortion
    < 1/4 Wave
Model Description
56-30-1-4X-λ 4X Diffraction Limited, High Transmission Variable Zoom Beam Expander
Specs & Docs
Specifications
Expansion Range 1-4X
Max. Input Aperture (mm) 10
Max. Output Aperture (mm) 30
Outside Diameter (mm) 37.6
Max. Length (mm) 180
Documents
56-30-2-8X-λ 8X Diffraction Limited, High Transmission Variable Zoom Beam Expander
Specs & Docs
Specifications
Expansion Range 2-8X
Max. Input Aperture (mm) 10
Max. Output Aperture (mm) 30
Outside Diameter (mm) 37.6
Max. Length (mm) 167
Documents
56-45-2-8X-λ 8X Diffraction Limited, High Transmission Variable Zoom Beam Expander
Specs & Docs
Specifications
Expansion Range 2-8X
Max. Input Aperture (mm) 10
Max. Output Aperture (mm) 45
Outside Diameter (mm) 66.7
Max. Length (mm) 163
Documents
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