With an overall size of 1" tall by 0.45" thick, the RSP05 Ø1/2" rotation mount is an ideal solution for compact optical assemblies. The center aperture accepts Ø1/2" (Ø12.7 mm) optics up to 0.23" thick (5.8 mm), held in place with a SM05RR retaining ring (one included with RSP05). The knurled edge of the RSP05 and the 360° laser engraved scale marked at 2° increments allows for precise, repeatable positioning and fine angular adjustment. A convenient top-located setscrew secures the rotational position of the stage.

Our Ø1" RSP1 and RSP1C rotation mounts utilize two precision bearings for smooth, backlash-free rotation. The apertures are threaded with our internal SM1 threading to accept Ø1" (Ø25.4 mm) optics. One SM1RR threaded retaining ring is included with each mount, which is used to hold an optic up to 0.47" (12 mm) thick for the RSP1 and 0.51" (12.8 mm) thick with the RSP1C mount. The SM1 threading also provides a means to connect SM1 lens tubes and other Thorlabs components to the mount.

Both mounts feature a knurled edge for adjusting rotation and a 360° laser-engraved scale marked at 2° increments allows for precise, repeatable positioning and fine angular adjustment. For calibration purposes, the scale on the RSP1C can be unlocked and rotated so that it can be aligned to the axis of an optic (i.e., fast axis of a waveplate). A top-located setscrew can be tightened to lock the rotation of the mount. The RSP1's scale cannot be adjusted like the RSP1C's.

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• Ideal for Ø1" Cylindrical Lenses
• Rotationally Align Optics Within a Lens Tube System
• Post Mountable via 8-32 (M4) Tapped Hole
• Features SM1 Quick Release Adapter on Back of Mount
• Holds Optics up to 0.27" (6.8 mm) Thick
• Lockable via Setscrew

The CLR1 (/M) is a rotation mount designed for use with Ø1" round cylindrical lenses and other rotationally sensitive optics within a lens tube system. As round cylindrical lenses only focus or expand light in one dimension, they are not easily aligned within a standard lens mount or lens tube. This rotation mount can be sandwiched between two lens tubes to provide rotation of the mounted optic without disturbing the attached lens tubes. The back side of this mount utilizes an SM1 quick release adapter, which allows the mount to be quickly disconnected and reconnected to a lens tube setup. Please note that this adapter must be removed while inserting an optic in the mount, but once the optic is mounted, the adapter can be reattached.

• Directly Mounts Ø1" (Ø25.4 mm) Optics up to 0.50" (12.7 mm) Thick
• Scale can be Rotated Independent of Mounted Optic for Alignment
• Switch Between Continuous Rotation and Discrete Rotation in 15° Increments
• 2° Gradation Marks, Numbered Every 20°
• 5 Arcmin Vernier Scale
• Ideal for Polarization Optics
• Post Mountable via 8-32 (M4) Tap

The RSP1X15 rotation mount features both continuous 360° rotation and 15° stepped rotation for Ø1" (Ø25.4 mm) optics. The optic is retained in the central SM1-threaded bore using the included SM1RR retaining ring. The top of the mount has a setscrew that, when loosened, allows for smooth, continuous, 360° rotation. Tightening the setscrew engages a detent mechanism that forces the mount to rotate in discrete 15° increments. In addition, the engraved scale can be unlocked and rotated independently of the optic so that the markings can be aligned with respect to the mounted optic. For example, the zero of the engraved scale can be aligned with the fast axis of a wave plate or the polarization axis of a linear polarizer. To help with the alignment, an engraved arrow extends the zero mark all the way to the outside edge of the SM1-threaded bore used to mount the optic. The animation to the right shows the moveable scale of the RSP1X15 being rotated to align with the fast axis of a wave plate; it also shows the engagement of the indexing mechanism.

Our Ø2" RSP2 and RSP2C rotation mounts utilize two precision bearings for smooth, backlash-free rotation. The apertures are threaded with our internal SM2 threading to accept Ø2" (Ø50.8 mm) optics. One SM2RR threaded retaining ring is included with each mount, which is used to hold an optic up to 0.51" (13 mm) thick for the RSP2 and 0.54" (13.7 mm) thick with the RSP2C mount. The SM2 threading also provides a means to connect SM2 lens tubes and other Thorlabs components to the mount.

Both mounts feature a knurled edge for adjusting rotation and a 360° laser-engraved scale marked at 2° increments allows for precise, repeatable positioning and fine angular adjustment. For calibration purposes, the scale on the RSP2C can be unlocked and rotated so that it can be aligned to the axis of an optic (i.e., fast axis of a waveplate). A top-located setscrew can be tightened to lock the rotation of the mount. The RSP2's scale cannot be adjusted like the RSP2C's.