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with Ø1" Optic
Cage Turret Mount
Thorlabs offers a series of gimbal mounts that provide rotation without translation; in each case, rotation occurs about the center of optic's front surface. These mounts are designed to eliminate angular or positional crosstalk when steering a beam of light and utilize hardened steel inserts to reinforce all key wear points. The GMB1(/M) features fully lockable adjusters to maintain the desired optical alignment. The KC45D can also be locked down through the inclusion of our locking collars. These mounts feature the highly stable design consistent throughout our entire line of kinematic and gimbal mounts.
GMB1 optic mount, which is designed to hold Ø1" (Ø25.4 mm) optics up to 0.25" (6.4 mm) thick, features true gimbal motion in order to eliminate crosstalk when steering a beam of light. The point of rotation for both axes is located at the center of the mounted optic’s surface. Utilizing locking thumbscrews and fine pitch adjusters, the GMB1 offers both coarse adjustment and fine tuning.The coarse adjustment allows 360° of manual positioning for both angular degrees of freedom. The fine adjustment allows for ±15° of control, with rotation of the control knob yielding 1° of angular displacement per revolution. The yaw can be adjusted in a similar fashion using the thumbscrew and setscrew closest to the post. After the desired pitch and yaw position is established, the entire mount can be easily locked into place by tightening both thumbscrews and both setscrews. The minimal profile of this mount is ideal for tight beam paths.
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The photo above shows the front (left) and back (right) of the GM200 Gimbal mirror mount.
Thorlabs' Gimbal Mirror Mounts are designed for intra-cavity use, and incorporate a true gimbal design that locates the optical surface directly on the axis of rotation. The design provides pure rotational motion without angular or positional crosstalk.
Please Note: Due to the internal drive mechanism, the adjustment knobs on these mounts do not provide perfectly linear motion. For specific measurements, please click here.
The photos above show the KC45D Gimbal mount in different 30 mm cage system configurations.
The KC45D Turret Mount is designed to allow a Ø1" optic to be rotated about a point in the center of a 30 mm cage assembly with true gimbal motion. The optic holder is free to rotate through 360º. Once its coarse angular orientation is set, the fine adjustment mechanism (i.e., two 100 TPI adjusters offering an adjustment per revolution of 13 mrad/rev) can be used for precise alignment, using the HKTS-5/64 hex key thumbscrew or any other 5/64" hex key or balldriver. The second angular degree of freedom is achieved by rotation of an intermediate saddle. This saddle connects the optic holder to the cage assembly and is free to rotate ±30º.The optic is secured against the back lip of the SM1 (1.035"-40) center tapped region using the included SM1RR Retaining Ring.