Introduction: CNI Beam Expander

By Yang Li
About: Changchun New Industries Optoelectronics Tech. Co., Ltd. (CNI), founded in 1996, is the largest manufacturer and supplier of diode pumped all-solid-state lasers (DPSSL) in China. CNI produces CW, modulated a…

A beam expander is any optical system designed to increase the diameter of a laser beam. In most cases, the term is taken to mean a telescope designed to take a small-diameter collimated beam input beam and produce a larger diameter collimated output beam, thus reducing the divergence of the beam. The beam expander consists of a negative input lens and a positive objective. The expansion factor is the ratio of the focal length of the two lenses.

Features:

Low power loss

Good output collimation

Able to withstand laser power of more than 1000 W

Adjustable divergence angle of 18 to 32 mrad with the variable beam expanders

Applications

Precision laser machining: capable to provide a high power density focal spot

Laser range finder: capable to provide a highly collimated beam

Combining with a spatial filter, able to modify laser power distribution

Step 1: BE Series Beam Expander for Beam Size of ≤2mm Diameter

Specifications

Part No. Expansion ratio Dimensions (mm)

BE-2x 2X Φ25*50

BE-3x 3X Φ25*50

BE-5x 5X Φ25*50

BE-10x 10X Φ30*65

Step 2: BEW Series Beam Expander for Beam Size of 4-10mm Diameter

Specifications

Part No. Expansion ratio Dimensions (mm)

BEW-2x 2X Φ29*51

BEW-3x 3X Φ36*74

BEW-5x 5X Φ46*109

BEW-10x 10X Φ86*197