With a corner mount, the center of the mirror is intentionally located at the xy intersection of the pitch and yaw adjusters, i.e., at the virtual fourth point of the square formed by the ball points of the three actuators. To achieve gimbal movement, two adjacent adjustment screws must be actuated the exact same distance. For gimbal pitch adjustment, the adjuster normally used for yaw adjustment must be actuated along with the corner adjuster the exact same distance. For gimbal yaw adjustment, the adjuster normally used for pitch adjustment must be actuated along with the corner adjuster the exact same distance. In this way, the mirror is being rotated about two virtual axes that intersect at the center of the optic, aka gimbal movement. Adjust one actuator at a time and the mount acts as a standard kinematic optical mount. Adjust all three actuators to translate the optic in Z-axis.
 

Sapphire kinematic pads create contact surfaces for the adjustment screws that have very low friction and will not will not dent under normal use. Sapphire ensures excellent 
adjustability and stability.
 

Another benefit of the corner mount design is the additional space between the optic and the adjustment knobs. This allows for sharper beam splitting angles and easier access to the adjustment screws.
 

All of Newport's Industrial mounts have Allen-key adjustments to save space and prevent unintended adjustment.

Since grease can migrate, causing long-term creep, these mounts are exclusively fitted with thread-matched adjustment screws which need almost no grease.  The result is actuators that have very smooth movement, and mounts with exceptional long-term and thermal stability.

To address the needs of our OEM customers, we offer commercial versions of our most popular mounts, 9762-K and 9888-K. Ideal for laboratory use, as well as for building into your products, these mounts feature sapphire pads for excellent adjustability and durability, extra-stiff springs and actuator locks for long-term stability, and two mounting holes per side, minimizing rotation when you secure the mounts. The optic can be secured either by a nylon-tip setscrew or by a retainer plate for reduced wavefront distortion.