The U50-G21 ULTIMA® Gimbal Optical Mount has a radically simple way of tilting an optic without translating its surface. Conventional gimbal mounts tend to be large and complex to allow high precision true gimbal motion at the optic surface. As a result, they are usually expensive. The ULTIMA-G has a simple patented design, allowing cost-effective, true gimbal mounts without the usual complexity. Like all ULTIMA mounts, thick front and rear plates and optimized, stiff springs improve the long-term stability and provide greater protection against vibrations.
This 1/2 inch (12.7 mm) mount is provided with two high precision locking, 100 TPI, hex adjustment screws providing a ±5° range. What makes the ULTIMA-G unique? The optic surface is mounted at the center of a sphere. Rotation of the sphere results in pure tilt at the center, without the translation found in all kinematic optical mounts. That means your beam will go exactly where you expect, without having to make iterative adjustments of the axes. The optic mounts from the rear so that the optical surface is at the plane of rotation, regardless of the optic thickness. Slotted mounting holes on two sides are compatible with either 8-32 or M4 screws for convenient mounting.
A gimbal mount has axes of rotation which intersect at the center front surface of the optic. When the mount is adjusted only the beam's angle changes, not its length. In contrast, a non-gimbal mount will shorten or lengthen a beam path as angle is adjusted.
ULTIMA Gimbal mounts feature an aperture designed for beam splitting. Because of the hollow-hemisphere design, beams are allowed to pass through the aperture allowing beam reflection and transmission. The aperture entrance is also designed with a deep 45-degree chamfer to accept beams at wide angles.
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