Beam expanders

Variable manual laser beam expanders

Beagle Optics introduces variable manual beam expanders used to increase laser beam diameter. Standard or custom-made laser beam expanders for the UV, visible, and NIR spectral ranges feature a unique mechanical sliding-lens design, ensuring high pointing stability and minimal dimensions

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

All-optical elements of beam expanders are made of fused silica with high LIDT coatings and provide stable and reliable performance even when using them with high power lasers. Large input and output apertures allow the optical beam expanders to produce diffraction-limited expanded beams for a wide range of input beams.

Main features

  • Highest beam pointing stability (<0,5 mrad)
  • Fused silica optical elements
  • Grease free mechanical design
  • Sliding lens design
  • Diffraction limited performance for all magnifications


Adjustment Manual

Divergence Adjustable

Pointing stability <0,5 mrad

Lens material UVFS

Transmission >97%

LIDT   3 J/cm2 (10 ns @ 355nm);

5 J/cm2 (10 ns @ 532 nm);

10 J/cm2 (10 ns @ 1064 nm)

Expansion 1.0x -3x continuous

Clear input aperture 11 mm

Clear output aperture 23,5 mm

Recommended max input beam diameter (1/e^2) ⌀7 mm (1x) – ⌀5 mm (3x)

Dimensions ⌀42 x 110 mm

Mounting options M30x1 external, SM1 internal, ⌀38.1 mm [1.5”], T-mount (M42x0.75)

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