• Ideal for Reducing Beam Divergence
• Diffraction-Limited Performance with <λ/4 Wavefront Error Introduced
• Input Aperture is Threaded to Work with our SM05- and SM1-Threaded Adapters
• Easy to Mount and Align using our Standard Posts and Mounts

The BE10M-B 10X Galilean Beam Expander provides an ideal solution for expanding or reducing beam diameters. This beam expander has been designed to minimize the telescope length, minimize the introduced wavefront error (<λ/4), and provide diffraction-limited performance (for <Ø1 mm input). The design incorporates a plano-concave singlet to provide the desired divergence and a doublet, which has been computer optimized to balance aberrations and re-collimate the beam. The rotary barrel controls adjustment of the diverging lens with graduations in 50 µm increments. This product is offered with a B (650-1050 nm) broadband antireflection coating.

• Expansion: 10X
• Input Aperture: Ø4.5 mm
• Input Beam Diameter: 2.25 mm
• Output Beam Diameter: 21.41 mm
• Wavelength: 840 nm
• AR Coating: 650 - 1050 nm
• AR Coating Reflectivity: <0.5% Over Coating Range
• Peak-to-Valley Wavefront Distortion: 0.0685λ
• RMS Wavefront Distortion: 0.0197λ
• Wavefront Error:
• Scratch-Dig: 20 – 10
• Lens Substrates: N-BK7, SF2
• Input Housing Dimension: Ø32.0 mm
• Output Housing Dimension: Ø56.0 mm
• Length of Housing: 116 - 136 mm
• Recommended Mount: KS2, TR2