SM2-Compatible Rotation Mounts
![](https://punchout.webdev02.thorlabs.com/Images/GuideImages/4119_SM2RotationMounts_3.jpg)
- Mount Ø2" (Ø50.8 mm) Optics or SM2 (Ø2.035"-40) Lens Tubes
- 360° Continuous Rotation
LC1A
Swivel Mount for
60 mm Cage Systems
RSP2
Ø2" Rotation Mount
LCRM2
Ø2" Rotation Mount for
60 mm Cage Systems
KS2RS
Ø2" Kinematic Rotation Mount
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Features
- Rotation Mounts with Internal SM2 (2.035"-40) Threads
- Compatible with SM2-Threaded Components
- Engraved Scale
This page has a compilation of rotation mounts that feature internal SM2 (2.035"-40) threads and can mount Ø2" (Ø50.8 mm) optics, SM2 lens tubes, or other SM2-threaded components. Each mount allows for 360° rotation of an optic, SM2-threaded component, or platform.
Thorlabs introduced the SM Thread Standards to ensure compatibility over a broad range of product lines. SM-threaded components offer a simple and efficient solution for building optomechanical structures. Our SM-threaded products, including lens tubes and cage system components, fixed and kinematic mounts, irises and diaphragms, provide flexibility when constructing complex optical systems. Please see the Threading Specs tab for more information on Thorlabs' SM thread standards.
Thorlabs also has similar compilations of SM-threaded rotation mounts for Ø1/2" (Ø12.7 mm) and Ø1" (Ø25.4 mm) optics. For our entire selection of rotation mounts, please see the Rotation Mounts and Stages tab.
Thorlabs' Threading Specifications
Thorlabs' lens tubes utilize a series of non-standard threadings. Threading specifications are given below for our SM threadings utilized in our lens tube and cage system components so that you can machine mating components to suit your application. We also offer products with C-Mount and RMS threadings, and the specifications for these threadings are also given below. Please note that other manufacturers may have different tolerances for these threads. For other thread specifications that are not listed here, please contact Tech Support.
SM05 Threading: Ø1/2" Lens Tubes, 16 mm Cage Systems | |||
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External Thread, 0.535"-40.0, UNS-2A | Internal Thread, 0.535"-40.0, UNS-2B | ||
Max Major Diameter | 0.5340" | Min Major Diameter | 0.5350" |
Min Major Diameter | 0.5289" | Min Pitch Diameter | 0.5188" |
Max Pitch Diameter | 0.5178" | Max Pitch Diameter | 0.5230" |
Min Pitch Diameter | 0.5146" | Min Minor Diameter (and 83.3% of thread) | 0.508" |
Max Minor Diameter | 0.5069" | Max Minor Diameter (and 64.9% of thread) | 0.514" |
RMS Threading: Objective, Scan, and Tube Lenses | |||
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External Thread, 0.800"-36.0, UNS-2A | Internal Thread, 0.800"-36.0, UNS-2B | ||
Max Major Diameter | 0.7989" | Min Major Diameter | 0.8000" |
Min Major Diameter | 0.7934" | Min Pitch Diameter | 0.7820" |
Max Pitch Diameter | 0.7809" | Max Pitch Diameter | 0.7866" |
Min Pitch Diameter | 0.7774" | Min Minor Diameter (and 83.3% of thread) | 0.770" |
Max Minor Diameter | 0.7688" | Max Minor Diameter (and 64.9% of thread) | 0.777" |
C-Mount Threading: Machine Vision Lenses, CCD/CMOS Cameras | |||
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External Thread, 1.000"-32.0, UN-2A | Internal Thread, 1.000"-32.0, UN-2B | ||
Max Major Diameter | 0.9989" | Min Major Diameter | 1.0000" |
Min Major Diameter | 0.9929" | Min Pitch Diameter | 0.9797" |
Max Pitch Diameter | 0.9786" | Max Pitch Diameter | 0.9846" |
Min Pitch Diameter | 0.9748" | Min Minor Diameter (and 83.3% of thread) | 0.966" |
Max Minor Diameter | 0.9651" | Max Minor Diameter (and 64.9% of thread) | 0.974" |
SM1 Threading: Ø1" Lens Tubes, 30 mm Cage Systems | |||
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External Thread, 1.035"-40.0, UNS-2A | Internal Thread, 1.035"-40.0, UNS-2B | ||
Max Major Diameter | 1.0339" | Min Major Diameter | 1.0350" |
Min Major Diameter | 1.0288" | Min Pitch Diameter | 1.0188" |
Max Pitch Diameter | 1.0177" | Max Pitch Diameter | 1.0234" |
Min Pitch Diameter | 1.0142" | Min Minor Diameter (and 83.3% of thread) | 1.008" |
Max Minor Diameter | 1.0068" | Max Minor Diameter (and 64.9% of thread) | 1.014" |
SM30 Threading: Ø30 mm Lens Tubes | |||
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External Thread, M30.5x0.5 | Internal Thread, M30.5x0.5 | ||
Max Major Diameter | 30.480 mm | Min Major Diameter | 30.500 mm |
Min Major Diameter | 30.371 mm | Min Pitch Diameter | 30.175 mm |
Max Pitch Diameter | 30.155 mm | Max Pitch Diameter | 30.302 mm |
Min Pitch Diameter | 30.059 mm | Min Minor Diameter (and 83.3% of thread) | 29.959 mm |
Max Minor Diameter | 29.938 mm | Max Minor Diameter (and 64.9% of thread) | 30.094 mm |
SM1.5 Threading: Ø1.5" Lens Tubes | |||
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External Thread, 1.535"-40, UNS-2A | Internal Thread, 1.535"-40, UNS-2B | ||
Max Major Diameter | 1.5339" | Min Major Diameter | 1.535" |
Min Major Diameter | 1.5288" | Min Pitch Diameter | 1.5188" |
Max Pitch Diameter | 1.5177" | Max Pitch Diameter | 1.5236" |
Min Pitch Diameter | 1.5140" | Min Minor Diameter (and 83.3% of thread) | 1.508" |
Max Minor Diameter | 1.5068" | Max Minor Diameter (and 64.9% of thread) | 1.514" |
SM2 Threading: Ø2" Lens Tubes, 60 mm Cage Systems | |||
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External Thread, 2.035"-40.0, UNS-2A | Internal Thread, 2.035"-40.0, UNS-2B | ||
Max Major Diameter | 2.0338" | Min Major Diameter | 2.0350" |
Min Major Diameter | 2.0287" | Min Pitch Diameter | 2.0188" |
Max Pitch Diameter | 2.0176" | Max Pitch Diameter | 2.0239" |
Min Pitch Diameter | 2.0137" | Min Minor Diameter (and 83.3% of thread) | 2.008" |
Max Minor Diameter | 2.0067" | Max Minor Diameter (and 64.9% of thread) | 2.014" |
SM3 Threading: Ø3" Lens Tubes | |||
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External Thread, 3.035"-40.0, UNS-2A | Internal Thread, 3.035"-40.0, UNS-2B | ||
Max Major Diameter | 3.0337" | Min Major Diameter | 3.0350" |
Min Major Diameter | 3.0286" | Min Pitch Diameter | 3.0188" |
Max Pitch Diameter | 3.0175" | Max Pitch Diameter | 3.0242" |
Min Pitch Diameter | 3.0133" | Min Minor Diameter (and 83.3% of thread) | 3.008" |
Max Minor Diameter | 3.0066" | Max Minor Diameter (and 64.9% of thread) | 3.014" |
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Rotation Mount and Stage Selection Guide
Thorlabs offers a wide variety of manual and motorized rotation mounts and stages. Rotation mounts are designed with an inner bore to mount a Ø1/2", Ø1", or Ø2" optic, while rotation stages are designed with mounting taps to attach a variety of components or systems. Motorized options are powered by a DC Servo motor, 2 phase stepper motor, piezo inertia motor, or an Elliptec™ resonant piezo motor. Each offers 360° of continuous rotation.
Manual Rotation Mounts
Rotation Mounts for Ø1/2" Optics | |||||||
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Item # | MRM05(/M) | RSP05(/M) | CRM05 | PRM05(/M)a | SRM05 | KS05RS | CT104 |
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Features | Mini Series | Standard | External SM1 (1.035"-40) Threads |
Micrometer | 16 mm Cage-Compatible | ±4° Kinematic Tip/Tilt Adjustment Plus Rotation | Compatible with CT1 Cage Translator Stage and 1/4" Translation Stagesb |
Additional Details |
Rotation Mounts for Ø1" Optics | ||||||||
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Item # | RSP1(/M) | LRM1 | RSP1D(/M) | DLM1(/M) | CLR1(/M) | RSP1X15(/M) | RSP1X225(/M) | PRM1(/M)a |
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Features | Standard | External SM1 (1.035"-40) Threads |
Adjustable Zero | Two Independently Rotating Carriages | Rotates Optic Within Fixed Lens Tube System |
Continuous 360° Rotation or 15° Increments |
Continuous 360° Rotation or 22.5° Increments |
Micrometer |
Additional Details |
Rotation Mounts for Ø1" Optics | ||||||
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Item # | LM1-A & LM1-B(/M) |
CRM1(/M) | CRM1L(/M) | CRM1P | KS1RS | K6XS |
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Features | Optic Carriage Rotates Within Mounting Ring | 30 mm Cage-Compatiblea | 30 mm Cage-Compatible for Thick Opticsa |
30 mm Cage-Compatible with Micrometera |
±4° Kinematic Tip/Tilt Adjustment Plus Rotation | Six-Axis Kinematic Mounta |
Additional Details |
Rotation Mounts for Ø2" Optics | |||||||
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Item # | RSP2(/M) | RSP2D(/M) | PRM2(/M) | LM2-A & LM2-B(/M) |
LCRM2(/M) | KS2RS | K6X2 |
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Features | Standard | Adjustable Zero |
Micrometer | Optic Carriage Rotates Within Mounting Ring | 60 mm Cage-Compatible | ±4° Kinematic Tip/Tilt Adjustment Plus Rotation | Six-Axis Kinematic Mount |
Additional Details |
Manual Rotation Stages
Manual Rotation Stages | ||||||
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Item # | RP005(/M) | PR005(/M) | MSRP01(/M) | RP01(/M) | RP03(/M) | QRP02(/M) |
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Features | Standard | Two Hard Stops | ||||
Additional Details |
Manual Rotation Stages | ||||||
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Item # | XRNR1(/M) | XRR1(/M) | PR01(/M) | CR1(/M) | XYR1(/M) | OCT-XYR1(/M) |
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Features | Fine Rotation Adjuster and 2" Wide Dovetail Quick Connect |
Fine Rotation Adjuster and 3" Wide Dovetail Quick Connect |
Fine Rotation Adjuster and SM1-Threaded Central Aperture |
Fine Pitch Worm Gear | Rotation and 1/2" Linear XY Translation | |
Additional Details |
Motorized Rotation Mounts and Stages
Motorized Rotation Mounts and Stages with Central Clear Apertures | |||||||
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Item # | DDR25(/M) | PDR1(/M) | K10CR1(/M) | PRM1Z8(/M)a | DDR100(/M) | ELL14 | HDR50(/M) |
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Features | Compatible with SM05 Lens Tubes, 16 mm Cage System, 30 mm Cage System |
Compatible with SM05 Lens Tubes, 30 mm Cage System, PD1(/M) Linear Stages |
Compatible with SM1 Lens Tubes & 30 mm Cage System |
Compatible with SM1 Lens Tubes, 16 mm Cage System, 30 mm Cage System |
Compatible with SM1 Lens Tubes, Open Frame Design for OEM Applications |
Compatible with SM2 Lens Tubes |
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Additional Details |
Motorized Rotation Mounts and Stages with Tapped Platforms | ||
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Item # | PRMTZ8(/M)a | ELL18(/M)b |
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Features | Tapped Mounting Platform for Mounting Prisms or Other Optics | Tapped Mounting Platform, Open Frame Design for OEM Applications |
Additional Details |
![](https://punchout.webdev02.thorlabs.com/images/arrow_Vert.gif)
- Accepts Ø2" (Ø50.8 mm) Optics up to 0.48" (12.2 mm) Thick
- 360° Continuous Coarse Rotation
- Direct Read 1° Graduations Engraved on Rotation Dial Face
- ±7° of Micrometer-Driven Fine Rotation when Locked
- Vernier Scale with 5 arcmin Resolution
- Compatible with our SM2 Lens Tubes and 60 mm Cage System
- One SM2RR Retaining Ring Included
- Bottom-Located 8-32 (M4) Tapped Hole for Post Mounting
The PRM2(/M) high-precision rotation mount for Ø2" optics combines 360° of continuous coarse manual rotation with precise, backlash-free micrometer adjustment. The SM2-threaded (2.035"-40) inner bore accepts Ø2" optics up to 0.48" (12.2 mm) thick as well as any of our SM2-threaded components. Optics are secured with one SM2RR retaining ring (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. This rotation mount also features a 0.05" hex setscrew on both sides that can lock both the fine and coarse rotational movement.
The PRM2(/M) is also compatible with our 60 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 or the four 4-40 tapped holes located on the back side of the mount. The cage system attached to the back of the mount does not rotate.
![](https://punchout.webdev02.thorlabs.com/images/arrow_Vert.gif)
- Mount Ø2" Optics up to 0.51" (13 mm) Thick
- Compatible with SM2 Lens Tubes
- One SM2RR Retaining Ring Included
- Bottom-Located 8-32 (M4) Tapped Hole for Post Mounting
The RSP2(/M) Continuous Rotation Mount utilizes two precision bearings for smooth rotation. The aperture features internal SM2 (2.035"-40) threading and accepts Ø2" optics up to 0.51" (13 mm) thick as well as any SM2-threaded component. Secure the optic using the included SM2RR retaining ring.
The mount has a knurled edge for 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 with a 5/64" (2.0 mm) hex key or balldriver to lock the rotation of the mount.
![](https://punchout.webdev02.thorlabs.com/images/arrow_Vert.gif)
This animation shows the movable scale of the RSP2D Mount being rotated to align with the fast axis of a wave plate.
- Mount Ø2" Optics up to 0.54" (13.7 mm) Thick
- Dial Face can be Rotated Independently of Mounted Optics
- 5 arcmin Vernier Scale
- Compatible with SM2 Lens Tubes
- One SM2RR Retaining Ring Included
- Bottom-Located 8-32 (M4) Tapped Hole for Post Mounting
The RSP2D(/M) Ø2" Continuous Rotation Mount offers the same features as the RSP2 featured above but also incorporates a rotatable dial that can be used, for example, to align a wave plate's optical axis after mounting. Like the RSP2(/M) above, this mount utilizes two precision bearings for smooth, backlash-free rotation. The aperture is threaded with our internal SM2 threading (2.035"-40) and accepts Ø2" optics up to 0.54" (13.7 mm) thick. Secure the optic's position using the included SM2RR retaining ring. The SM2 threading also provides a means to connect SM2 lens tubes and other Thorlabs components to the mount.
This mount has a 360° laser-engraved scale marked at 2° increments to allow for precise, repeatable positioning and fine angular adjustment. The front dial scale can be unlocked and rotated using a 5/64" (2.0 mm) hex key so that the scale can be aligned to the axis of an optic for calibration purposes. A top-located setscrew can be tightened with a 5/64" (2.0 mm) hex key or balldriver to lock the rotation of the mount.
![](https://punchout.webdev02.thorlabs.com/images/arrow_Vert.gif)
- Mount Ø2" Optics Up to 0.46" (11.7 mm) Thick
- Optic Carriage (LM2-A) and Mounting Ring (LM2-B or LM2-B/M) Sold Separately
- Rotating Optic Carriage is Interchangeable for Quick Swapping
- SM2-Threaded Optic Bore in Rotating Optic Carriage
- Post Mountable via 8-32 (M4) Tap
- Laser Engraved Scale with Graduations Every 2°, Labeled Every 20°
The LM2-A optic carriage can be nested inside of the LM2-B (LM2-B/M) mounting ring and offers 360° of continuous rotation for Ø2" optics. The optic bore of each carriage features internal SM2 (2.035"-40) threading and can hold an optic up to 0.46" (11.7 mm) thick with the included SM2RR retaining ring an optic in an SM2-threaded housing. The carriage attaches to the main body of the mount using a thumbscrew. To remove the carriage from the mount, simply loosen the thumbscrew. Extra LM2-A interchangeable rotating carriages are available to allow optics to be swapped out quickly at easily.
Each carriage has a 360° laser-engraved scale marked at 2° increments for precise, repeatable positioning. The top-located thumbscrew can be tightened to lock the rotation of the optic carriage and, along with the double bore on the mount, maintains a stable, three-point contact to hold the optic carriage. When the LM2-A is properly fastened in the LM2-B by the thumbscrew, the optic axis is 1.45" (36.8 mm for the LM2-B/M) above the top of the post.
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- Combines Kinematic Angular Adjustment with Rotation in One Mount
- Two 1/4"-80 Lockable Stainless Steel Adjusters with Removable Knobs and Brass Bushings for Smooth Adjustments
- Four #8 (M4) Counterbored Mounting Holes Allow Left-Handed or Right-Handed Orientations
- Engraved Rotation Scale with 2° Graduations Provides 360° Rotation
- SM2-Threaded (2.035"-40) Rotation Ring with Locking Screw
The KS2RS is designed to hold Ø2" (50.8 mm) optics in situations where it is necessary to control the tip/tilt position as well as the rotation of the optic. This mount is ideal for polarization optics such as linear polarizers or wave plates. In addition, our mounted dove prisms with SM2 threading may also be mounted in the KS2RS to change the orientation of the rotated image. The KS2RS features an SM2-threaded bore capable of mounting Ø2" optics up to 0.47" (12.0 mm) thick using the included SM2RR retaining ring. Additionally, SM2 lens tubes may be threaded onto the mount to accomodate thicker optics.
Thorlabs' Kinematic Rotation Mounts combine the features of our Precision Kinematic Mirror Mounts and Manual Rotation Mounts, providing continuous 360° rotational adjustment and ±4° kinematic tip/tilt adjustment. These mounts are therefore ideal for holding optics with rotational
The rotation of the mount may be locked in position with a locking screw. The locking screw is activated using a 5/64" (2 mm) hex key. The kinematic adjustment is provided by two 1/4"-80 adjusters with brass bushings to provide smooth adjustment. Each adjuster may be locked with a locking screw using a 5/64" (2 mm) hex key.
Please note that while this mount is designed to hold Ø2" optics, the mount uses the same form factor as the KS3 Ø3" mirror mount in order to incorporate the rotation ring.
If higher adjustment resolution or control is desired, the 1/4"-80 adjusters used in these mounts can be switched with DAS110 or DM22 Differential Adjusters.
![](https://punchout.webdev02.thorlabs.com/images/arrow_Vert.gif)
6-Axis Kinematic Mount Usage
- Six Adjustment Axes with Locks
- Kinematic Pitch/Yaw: ±4° at 3.6 mrad/rev
- X and Y Translation: ±2 mm at 254 µm/rev
- Z Translationa: ±0.13" (±3.2 mm) at 318 µm/rev
- Continuous 360° Roll Control with 1° Graduations
- Independent X, Y, and Roll Adjustment
- SM2-Threaded Bore for Ø2" (50 mm) Optics up to 0.53" (13.4 mm) Thick
- Six #8 (M4) Counterbores for Post Mounting
The K6X2 6-Axis Kinematic Optic Mount is designed as a general-purpose, high-precision positioner. The optic cell can be translated along or rotated about 6 axes, and each axis has a locking screw for stability. The mount uses 1/4"-80 adjuster screws for pitch, yaw, and z-axis adjustment, and 3/16"-100 adjuster screws for x- and y-axis adjustment.
The translating cell has SM2 (2.035"-40) threading for attaching Ø2" lens tubes or mounting Ø2" (50 mm) optics up to 0.53" (13.4 mm) thick using the included SM2RR Retaining Ring, which can be tightened using an SPW604 Spanner Wrench (sold separately). In testing, the X and Y axes of the K6X2 caused less than ±35 µm of crosstalk.
If higher adjustment resolution is desired, the three 1/4"-80 adjusters used for tip/tilt translation can be switched with DAS110 or DM22 Differential Adjusters.
![](https://punchout.webdev02.thorlabs.com/images/arrow_Vert.gif)
- Mounts Ø2" (Ø50.8 mm) Optics up to 13 mm (0.51") Thick
- Ø48 mm Clear Aperture
- 360° of Continuous Rotation
- 1° Engraved Graduations on Dial, Labeled Every 10°
- Setscrew Locking Mechanism
- Compatible with 60 mm Cage System
- 8-32 (M4) Tapped Hole for Post Mounting
The LCRM2 rotation mount is designed to mount Ø2" (Ø50.8 mm) optics up to 13 mm (0.51") thick in a 60 mm cage system. The optic is secured using the included SM2RR retaining ring (the SPW604 spanner wrench is ideal for tightening this retaining ring). For thicker optics, any of our SM2 lens tubes can be threaded into the carriage. The smooth rotation mechanism allows for precise positioning of the rotation carriage. The mount features a bottom-located 8-32 (M4) tapped mounting hole for post mounting, making it compatible with our Ø1/2" posts.
![](https://punchout.webdev02.thorlabs.com/images/arrow_Vert.gif)
![Camera Rotation Mount](https://punchout.webdev02.thorlabs.com/images/tabimages/LCP16R_SeriesMount_A13-250.jpg)
Click to Enlarge
This mount offers 360° of coarse rotation via the rotation ring and ±8° of fine rotation via the threaded adjuster. The coarse and fine rotation are independent of each other and both positions can be locked using the respective 5/64" (2 mm) hex locking screws.
The LCP16R2 mount includes an LCP16RP2 SM2-threaded rotation ring that can be removed (left) and replaced with an LCP16RP1 SM1-threaded rotation ring (right).
- Mount Ø2" (Ø50.8 mm) Optics or SM2-Threaded Components
- Ø1.90" (Ø48.3 mm) Clear Aperture
- ±8° of Fine Rotation; 360° of Manual Coarse Rotation
- 1° Engraved Graduations, Labeled Every 2° up to ±8°
- Setscrew Locking Mechanism
- Suitable for Cantilevered Loads up to 0.5 ft-lbs (0.68 N•m) Torque
- Included LCP16RP2 Removable Rotation Ring
- One 8-32 (M4 x 0.7) Hole for Post Mounting
Thorlabs' LCP16R2(/M) 60 mm Cage System Rotation Mount with SM2 Threads provides ±8° of fine and 360° of coarse rotation angle adjustment for SM2-threaded components integrated with a 60 mm cage system. A nylon-tipped setscrew secures the included LCP16RP2 rotation ring; this setscrew can be loosened using a 5/64" (2 mm) hex key to allow for 360° of manual rotation (see the image to the right). Once this screw is tightened, fine rotation adjustment is achieved via a 3/16"-100 threaded adjuster. A fine adjustment scale engraved on the top of the mount has graduations every 1° with a range of ±8°.
This mount features four through holes for ER cage rods that are compatible with Thorlabs' 60 mm cage system or cameras that use this hole pattern, such as our scientific CCD cameras. The removable rotation ring on the front of the mount has 0.40" (10.1 mm) deep internal SM2 (2.035"-40) threads, allowing Ø2" (Ø50.8 mm) optics, Ø2" lens tubes, or other externally SM2-threaded components to be integrated with the rotation mount. Internally C-mount threaded components, such as Thorlabs' USB C-Mount CCD, Quantalux® sCMOS, or Kiralux™ CMOS cameras, can be attached to the rotation ring using an SM2A55 adapter.
Users can switch out the included SM2-threaded LCP16RP2 rotation ring with the SM1-threaded LCP16RP1 rotation ring to integrate SM1-threaded components into the LCP16R2(/M) mount; see the image to the right. We also offer the LCP16RP2 rotation ring separately in case a replacement is needed. To switch the rotation ring in a mount, loosen the side-located setscrew using a 5/64" (2 mm) hex key and replace the rotation ring with the desired one.
We also have available an SM1-threaded 60 mm cage system rotation mount.
![](https://punchout.webdev02.thorlabs.com/images/arrow_Vert.gif)
- ±90° Angular Displacement Between Two 60 mm Cage Plates
- Platform with 0.93" (23.6 mm) Vertical Height Adjustment
- Independently Lockable Plates and Mounting Platform
- Generous Array of Mounting Holes on Platform
The LC1A(/M) Swivel Mount is ideal for building spectrometers or other prism- and grating-based systems that require arbitrary angular alignment. The swivel plates are internally threaded for compatibility with our SM2 (2.035"-40) Series of Lens Tubes. In addition, the plates and mounting platform of the LC1A(/M) are independently lockable.
The pedestal can rotate through a full 360° and provides 0.93" (23.6 mm) of vertical height adjustment. To aid in alignment, there is an engraved scale with 2° increments below the pedestal. The platform has an array of threaded holes, making it easy to mount a variety of optical elements, such as prisms and gratings, using our PM3(/M) or PM4(/M) clamping arms. See the drawing to the right for more details.