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Laser Beam Expanders

Special Optics Inc have been manufacturing and designing the highest quality lens systems since 1965. Their range of beam expanders is extensive and includes low power, high power, large aperture, manual zoom and motorized variable zoom beam expanders, covering wavelengths from the UV to the IR

Special Optics catalogue

Request your FREE 60-page Special Optics Catalogue today . This informative guide includes:

  • Detailed specifications on all Special Optics Laser Beam Expanders
  • Laser Beam Expander theory section
  • Custom lens specification request form
  • Coating curves

Low Power

Low Power Beam Expanders
Low power beam expanders
  • Adjustable focus for collimation at various wavelengths
  • Diffraction limited design
  • < 1/8 Wavefront distortion
  • > 97% transmission
  • 500 MW/cm2 coating damage threshold
  • 248 - 1550 nm useable spectral range
    •
Model No. Expansion Ratio Input Aperture (mm) Output Aperture (mm) Length @ 1064nm (mm)
50-25-2X-λ 2X 7.3 22 89
50-25-3X-λ 3X 5.5 22 108
50-25-4X-λ 4X 4.8 22 118
50-25-4.5X-λ 5X 4.4 22 126
50-25-5X-λ 5X 3.6 22 122
50-25-6X-λ 6X 3.1 22 128
50-25-7X-λ 7X 2.7 22 131
50-25-8X-λ 8X 2.2 22 138
50-25-10X-λ 10X 2.2 22 140
50-25-12X-λ 12X 1.8 22 141
50-25-18X-λ 18X 1.3 22 145
50-51-4X-λ 3.9X 11.7 47 203
50-51-7X-λ 6.8X 6.7 47 239
50-51-10X-λ 10.2X 4.7 47 253
50-51-20X-λ 20.6X 2.3 47 267

High Power

High Power Beam Expanders
High power beam expanders
  • Adjustable focus for collimation
  • Diffraction limited design
  • < 1/4 Wavefront distortion
  • > 97% transmission
  • 500 MW/cm2 coating damage threshold
  • 248 - 1550 nm useable spectral range
    •
Model No. Expansion Ratio Input Aperture (mm) Output Aperture (mm) O.D. x Length @ 1064nm (mm)
52-25-2X-λ 2X 7 15.0 34.9 x 72
52-25-4X-λ 4X 7 30.0 44.5 x 127
52-51-7X-λ 7X 7 51.6 66.7 x 172
52-71-5X-λ 5X 14 71.6 85.7 x 248
52-71-10X-λ 10X 7 71.6 85.7 x 248
52-71-20X-λ 20X 3.5 71.6 85.7 x 248

IR

IR Beam Expanders
IR beam expanders
  • Adjustable lens spacing
  • Low insertion loss
  • Zinc Selenide lens elements
  • 9.0 - 10.6μm wavelength range
    •
Model No. Expansion Ratio Input Aperture (mm) Output Aperture (mm) O.D. x Length (mm)
53-25-2X-λ 2X 12.5 25.0 38.1 x 83
53-25-3X-λ 3X 4.0 15.0 31.75 x 83
53-25-5X-λ 5X 5.0 25.0 44.5 x 109
53-25-10X-λ 10X 2.5 25.0 38.1 x 147
53-50-2X-λ 2X 25.0 50.0 69.9 x 147
53-50-5X-λ 5X 10.0 50.0 69.9 x 147
53-50-10X-λ 10X 5.0 50.0 69.9 x 147
53-76-5X-λ 5X 14.4 72.0 85.7 x 230
53-76-10X-λ 10X 7.2 72.0 85.7 x 230

UV

UV Beam Expanders
UV beam expanders
  • No focused retro-reflections
  • Adjustable lens spacing
  • Low insertion loss
  • < 1/4 Wavefront distortion
  • > 97% transmission
  • 248 - 351nm wavelength range
    •
Model No. Expansion Ratio Input Aperture (mm) Output Aperture (mm) O.D. x Length (mm)
61-25-4X-λ 4X 6.25 25.0 31.75 x 120
61-25-7X-λ 7X 3.50 25.0 31.75 x 134
61-25-10X-λ 10X 2.50 25.0 31.75 x 141

Variable

Variable Beam Expanders
Variable beam expanders
  • Compatable with standard computer controlled actuators
  • Replaces several fixed wavelength devices
  • Low insertion loss
  • < 1/4 Wavefront distortion
  • > 95% transmission
  • 248 - 351nm wavelength range
    •
Model No. Expansion Range Input Aperture (mm) Output Aperture (mm) Wavelength range
61-30-2-8X-λ 2-8X 10.0 30.0 248 – 355nm
56-30-2-8X-λ 2-8X 10.0 30.0 450 - 1100nm
56-45-2-8X-λ 2-8X 10.0 45.0 450 - 1100nm
53-26-2-10X-λ 2-10X 10.0 26.5 9.3 or 10.6μm

Motorised

Motorised Beam Expanders
Motorised beam expanders
  • Diffraction-limited design
  • 5 element design reduces internal focus
  • Continuous zoom and focus adjustments
  • Mechanicals specifically designed to minimize beam wander
    •
Expansion Range 2x-8x Continuous or 1x-4x continuous
Input Aperture 10mm Max
Output Aperture 30mm
Beam Wander 0.15 mRad for 1-4X Beam Expander 0.3 mRad for 2-8X Beam Expander
Wavefront Distortion <1/4 Wave @ 633 nm
Beam Wander 0.15 mRad for 1-4X Beam Expander 0.3 mRad for 2-8X Beam Expander
Usable Wavelength Range 450-675nm
600-900nm
800-1200
1100-1600nm
248-425 nm
9.3 or 10.6um
Field of View +/-0.5 degrees
Transmission >95%
Expansion Change Time < 10 seconds
Usable Temperature Rang -10 to +50 Celsius