Item #	Expansion	Input Aperture	AR Coating
BE-3X	3X	Ø5 mm	350-13400 nm
BE-5X	5X	Ø4 mm	350-1340 nm
BE-10X	10X	Ø3 mm	350-1340 nm

※High Performance Optical Design

Fine adjustment of Focus with Knob

99% High Transmission Coating

3x, 5x, 10x Options of Expansion Power

Interchangable Adapter Rings For Laser Pens and Portable Lasers - FREE!

A laser beam expander is designed to increase the diameter of a collimated input beam to a larger collimated output beam. Beam expanders are used in applications such as laser scanning, interferometry, and remote sensing. Contemporary laser beam expander designs are afocal systems that developed from well-established optical telescope fundamentals. In such systems, the object rays, located at infinity, enter parallel to the optical axis of the internal optics and exit parallel to them as well. This means that there is no focal length to the entire system.

Laser beam expanders feature diffraction limited optical designs with large output clear apertures of 1.3 mm to over 100mm, expansion ratios from 2X to 10X and input apertures of 1.3 mm to 20mm. The beam expanders have high transmission, low wavefront distortion and can be specified at single and dual wavelengths from 248nm to 1550nm. Damage thresholds are typically 500MW/cm2.

Featuring standard clear entrance apertures of up to 20mm, Special Optics beam expanders transmit the entire beam with excellent wavefront quality. Beam truncation could produce significant energy loss as well as thermal effects.

※Freaklasers laser safety goggles employs the absorptive tech and Suitable over prescription spectacles and low cost, these are ideal general purpose laser safety protection. Indirect lateral ventilation prevents formation of condensed moisture inside the goggles.