Optic Rotation Mount, 25.4 mm, 2° Graduations, OpticsCage+

The RM25B Polarizer Rotation Mount has special cutouts in its frame making it compatible with Newport's OpticsCage+™ Optical Cage system but can also be used as a stand alone polarizer rotator. This mount  allows 1 in. (25.4 mm) diameter linear polarizers, wave plates, Glan-laser calcite polarizers, and polarizing cube beamsplitters to be continuously rotated 360 °. The extra deep mounting barrel holds polarizers up to 0.5-inch thick. A graduated scale marked in 2° increments indicates angular position. Rotation can be locked to prevent accidental adjustment and reduce drift. The 1-inch diameter rear flange on RM25B can be mounted to U100-A ULTIMA^® optical mounts for precision tip/tilt and rotation. Three tapped holes per side permit secure mounting in industrial OEM optical systems. The mount comes with two 1 inch (25.4 mm) retaining rings <a href="https://www.newport.com/p/A-1.25-1RR">A-1.25-1RR</a>. A 1/2-in diameter polarizer or waveplate can be mounted to the RM25B rotator mount using the PRA-05 Adaptor, which screws into the rotator's 1.063-20 thread.