SM1-Compatible Rotation Mounts


SM1 Compatible Rotation Mounts

  • Mount SM1 (Ø1.035"-40) Lens Tubes or Ø1" (Ø25.4 mm) Optics
  • Ø1/2" Optic Rotation Mount with External SM1 Threads

This page is a compilation of all of the SM1(1.035"-40) threaded rotation mounts. Thorlabs also has a similar compilations of SM threaded rotation mounts for Ø1/2" (12.7 mm) and Ø2" (50 mm) optics. If SM threading is not a primary requirement for the rotation mount, please see our complete line of manual and motorized rotation mounts.

Continuous Rotation Mount for Ø1" Optics

* Mount Ø1" Optics up to 0.47" (12 mm) Thick
* Compatible with SM1 Lens Tubes
* One SM1RR Retaining Ring Included
* Post Mountable via an 8-32 (M4) Tapped Hole

The RSP1(/M) Continuous Rotation Mount utilizes two precision bearings for smooth, backlash-free rotation. The aperture is threaded with our internal SM1 threading (1.035"-40) and accepts Ø1" optics up to 0.47" (12 mm) thick. Secure the optic with the included SM1RR retaining ring. The SM1 threading also provides a means to connect SM1 lens tubes and other Thorlabs components to the mount.

This mount has a knurled edge for adjusting rotation. A 360° laser-engraved scale marked at 2° increments allows for precise, repeatable positioning and fine angular adjustment. A top-located setscrew can be tightened to lock the rotation of the mount.


High-Precision Rotation Mount for Ø1.00" Optics

  • Accepts Ø1" (Ø25.4 mm) Optics up to 0.50" (12.7 mm) Thick
  • 360° Continuous Coarse Rotation
  • Direct Read 1° Graduations Engraved on Rotation Dial Face
  • When Locked, Micrometer Driven ±7° of Fine Rotation
  • Vernier Resolution: 5 arcmin
  • Compatible with our SM1 Lens Tubes and 30 mm Cage System
  • One SM1RR Retaining Ring Included
  • Bottom-Located 8-32 (M4) Tapped Hole for Post Mounting

The PRM1(/M) high-precision rotation mount for Ø1" optics combines 360° of continuous manual rotation with precise, backlash-free micrometer adjustment. The SM1 (1.035"-40) threaded inner bore accepts Ø1" optics up to 0.50" (12.7 mm) thick as well as any of our SM1-threaded components. Optics are secured with one SM1RR retaining ring, which is included with each mount.

The rotation dial face features a laser-engraved scale marked at 1° increments and can be rotated manually using the knurled outer surface (see drawing to the right). The thumbscrew, located on the lower right side of the mount, locks the dial face and engages the micrometer for fine adjustment. When locked, the micrometer provides ±7° of rotation at approximately 2.4 arcmin per micrometer division.

The PRM1(/M) is ideal for mounting either our SM1PM10 or SM1PM15 Polarizing Prism Mounts, both of which feature compatible SM1 threading. It can be purchased bundled with our SM1PM10 (Item# PRM1GL10(/M) below). Together they provide 360° of high precision rotation for either our 10 mm Glan-Laser or Glan-Taylor Polarizer (sold separately).

The PRM1(/M) is also compatible with our 30 mm cage system. The cage system can be mounted to the unit using ER cage assembly rods attached to the four 4-40 tapped holes located on the rotation dial face.


Indexing Rotation Mount for Ø1" Optics

  • Directly Mounts Ø1" 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" optics. The optic is retained in the central SM1-threaded (1.035"-40) 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.


Lens Tube Continuous Rotation Mount for Ø1" Optics

  • 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 (1.035"-40) 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.


Ø1" Optic Holder

* Interchangeable Mounting Carriage
* Holds Ø1" (Ø25.4 mm) Optics up to 0.35" (8.9 mm) Thick
* Laser Engraved Graduation Marks Every 2° Labeled Every 20°

The LM1-A is an SM1 threaded mounting carriage for Ø1" (Ø25 mm) optics that can be nested inside of an LM1-B (LM1-B/M) post mountable ring. The engraved angular scale on the outside edge of the LM1-A mounting carriage makes it easy to orient the carriage inside of the mounting ring.


30 mm Cage Rotation Mount, SM1 Threaded

* 360° of Continuous Rotation, Lockable
* 2° Graduations on Dial, Labeled Every 20°
* 30 mm Cage System Compatible

The CRM1 (CRM1/M) is designed to mount Ø1" (Ø25 mm) optics up to 10 mm thick in an SM1 threaded rotation carriage. The optic is secured using the included SM1RR retaining ring (the SPW602 spanner wrench is ideal for tightening this retaining ring). For thicker optics, any of our SM1 series of lens tubes can be threaded into the carriage or the CRM1L can be used instead. The smooth rotation mechanism allows for precise positioning of the rotation carriage. The CRM1 is designed to be mounted in a 30 mm cage structure.


SM1-Threaded Continuous Rotation Mount for Ø1/2" Optics

  • Mount Ø1/2" Optics up to 0.26" (6.5 mm) Thick
  • Compatible with SM05 Lens Tubes
  • One SM05RR Retaining Ring Included
  • Mountable via External SM1 Threads

The CRM05 Ø1/2" Rotation Mount is designed with an external SM1 thread (Ø1.035"-40), allowing the mount to be threaded directly onto any internally SM1-threaded device such as SM1 lens tubes or 30 mm cage cubes. The center aperture is SM05-threaded (Ø0.535"-40) and accepts Ø1/2" (Ø12.7 mm) optics up to 0.26" (6.5 mm) thick. Optics are held in the mount with a SM05RR retaining ring (one included). Two notches along the mount’s circumference accommodate the SPW801 adjustable spanner wrench to aid in securing the mount into place. The knurled edge of the CRM05 and the 360° laser-engraved scale marked at 2° increments allow for precise, repeatable positioning and fine angular adjustment. Four equally spaced witness lines are engraved into the mount’s perimeter, ensuring there is always a witness line in a convenient and easily readable position. Tighten the 2-56 setscrew to lock the mount into position, preventing further rotation.


Precision Cage Rotation Mount, Ø1" (Ø25.4 mm) or Ø25 mm Optics

  • 360° Coarse Rotation, Lockable
  • 2° Graduations on Dial, Labeled Every 20°
  • ±7° Precision Micrometer Adjustment
  • Vernier Scale Provides 5 arcmin Resolution
  • Accepts Ø1" (Ø25.4 mm) or Ø25.0 mm Optics up to 0.37" (9.4 mm) Thick
  • 8-32 (M4) Tapped Mounting Hole to Mount on TR Series Posts

The CRM1P(/M) is designed to mount Ø1" (Ø25.4 mm) optics up to 9.4 mm thick in an SM1 threaded rotation carriage. The optic is secured using the included SM1RR retaining ring (the SPW602 spanner wrench is ideal for tightening this retaining ring). For thicker optics, any of our SM1 series of lens tubes can be threaded into the carriage. The smooth rotation mechanism on the CRM1P(/M) can be manually rotated to any position. When the rotation carriage is locked, the high-precision, backlash-free micrometer can then be used to fine tune the position of the rotation carriage over a range ±7°. The animation to the right illustrates how the CRM1P is used. The Vernier scale provides a resolution of 5 arcmin between consecutive marks. As the mount is rotated across the entire Vernier scale, there is a cumulative error of up to ±12.28 arcmin. The CRM1P(/M) is compatible with the 30 mm cage system and the 8-32 (M4) tapped mounting hole allows the rotation mount to be put on a TR series post.

This mount is also mechanically compatible with Ø25.0 mm optics, but we only recommend this for applications in which the centration of the optics is not critical.


High Precision Rotation Mount

* 360° Coarse Rotation
* 1° Graduations on Main Dial
* Vernier Scale Provides 5 arcmin Resolution
* 2.4 arcmin per Micrometer Division
* When Locked, Micrometer-Driven ±5° of Fine Rotation
* Load Capacity for Coarse Adjustment: 25 lbs (11.25 kg)
* Load Capacity for Fine Adjustment: 3.75 lbs (1.7 kg)
* Accepts Ø1" Optics up to 0.70" Thick

The PR01 Precision Rotation Platform combines easy-to-use manual rotation with high-precision, backlash-free micrometer adjustment. While the platform dial is in an unlocked state, continuous smooth rotation can be measured using the 1º graduation marks. When locked via the steel thumbscrew (visible in image above), the dial is adjusted by a ±5º micrometer drive system, offering 5 arcmin. resolution from the side vernier. For even higher angular resolution, the vernier can be used to calibrate the micrometer head graduations to as low as 1 arcmin. across a ±5º range with an accuracy of better than 1%. The PR01 has a load capacity of 25 pounds.

The SM1 (1.035"-40) tapped hole provides a Ø0.94" (24 mm) clear aperture at the base and 0.75" (19 mm) of usable thread. An array of 1/4"-20 (M6), #6-32 (M4), and #4-40 tapped holes offer a range of mounting options. While the 1/4"-20 (M6) tapped holes are for general purpose mounting, the #6-32 (M4) tapped holes provide compatibility with our PM1/PM2 series of clamping arms for applications including prism mounting. The #4-40 tapped holes are spaced for direct compatibility with our 30 mm Cage System rod spacing.

For optomechanical applications requiring a solid center rather than the SM1 tapped hole, the PR01A adapter plate is available.

Four 1/4" (M6) clearance slots are spaced for direct fastening to an optical table. An additional 1/4"-20 (M6) tapped hole on the edge opposite the micrometer drive allows for vertical mounting.


XY Translation Plus Z Axis Rotation Stage

  • 1/2" Linear Travel along X and Y Axes
  • 360° of Continuous Rotation
  • Low-Profile Stage for Imaging Applications

The XYR1 is a low profile XY axis translation stage with continuous rotation about the Z axis. The central SM1-threaded through-hole allows the stage to be used in an imaging application that requires illumination from underneath the sample. The stage contains an array of 1/4"-20 (M6) and #8-32 (M4) tapped holes for mounting samples and components. In addition, the stage has eight #4-40 tapped holes around the central through-hole so that it can be used with Thorlabs' 30 mm or 60 mm cage system without the use of adapters.

The X and Y axis micrometers on the translation stage have a travel range of 1/2" (13 mm). An engraved angular scale along the outer edge of the stage's mounting surface allows the user to set the angular orientation of the stage, which can then be fixed using a locking setscrew. Locking the rotation axis does not prevent translation along the X and Y axes. To prevent attached components from interfering with the stage’s rotation or translation, the top surface of the rotation platform is above the frame of the XYR1.


Motorized Rotation Stage/Mount

 The central aperture of the PRM1Z8 rotation mount has a standard SM1 internal thread, for compatibility with a range of optics. Two SM1RR retaining rings are included to secure optical components in this aperture. Four #4-40 holes are provided so that the PRM1Z8 can be incorporated into a cage system. Additional threaded mounting holes allow for the addition of accessories or post mounting (See Mounting tab).

The PRM1Z8 is supplied with 19.6" (0.5 m) of cable. An 8 ft (2.5 m) extension cable (PAA632) is available separately.


Motorized Rotation Stage/Mount and Controller

 The PRM1Z8E (PRM1/MZ8E) bundles the PRM1Z8 (PRM1/MZ8) Motorized Rotation Mount with our TDC001 T-Cube DC Servo Motor Controller, an ideal companion for smooth, continuous motion that can be automated via the software interface. The bundle ships complete with a TPS001 universal power supply, which includes a location-specific adapter.

The PRM1Z8E (PRM1/MZ8E) are supplied with 19.6" (0.5 m) of cable. An 8 ft (2.5 m) extension cable (PAA632) is available separately.


 Motorized Precision Rotation Mount

 The rotating platform features several accessories. The central aperture has a standard SM1 internal thread, for compatibility with a range of optics. Four #4-40 holes are provided


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