The 9071 Four-Axis Tilt Aligner allows you to intuitively align optical tubes that comprise an input and an output (e. g., electro-optic or acousto-optic modulators or lenses). Center one end to the laser beam, then adjust the other until the beam emerges. All motions are independent and connected to a single base, so you won't induce coupled motion while making adjustments. These stages are great for aligning New Focus® modulators. 8-32 and 1/4-20 Threads. Patent Number 5,303,035