Fixed Power HeNe Beam Expanders

Our family of laser beam expanders offer high performance optical designs packaged in a precise opto-mechanical platform. Two full rotations of the focus knurl provide smooth movement for the optics in order to vary the output from collimated to the minimum focus distance of 1.2 meters. The precise focusing mechanism keeps optics from rotating, which helps maintain bore sight accuracy and a minimally aberrated focused beam. Focus lock secures position. The beam expanders are easily secured to both metric and English threaded mounts. Four tapped holes (two M6 on 25mm centers and two 1/4-20 on 1" centers) are located near the middle of the assembly for mounting.

Rear accessory attachments are an effortless, cost-effective way to change beam expander magnification. Simply disassemble the back portion of the beam expander (unscrew three socket head cap screws) and replace it with the desired magnification attachment listed below. For instance, the 20x Beam Expander (#55-579) can be changed to a 5x Beam Expander by utilizing the 5x Rear Attachment (#55-580) in place of the 20x attachment that was originally included. Note: Rear Accessory Attachments cannot be used in series to increase the magnification. Other features included in the design are: focus locking set screw, C-Mount interface (1"-32TPI) for mounting onto our HeNe lasers, and 1/4 wave MgF₂ (@ 632.8nm) anti-reflection coated optics.

Note: Rear Accessory Attachments cannot be used in series to increase magnification.