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Nested Rotation Mounts


  • Optic Carriage Rotates Within Mounting Ring
  • Models Available for Ø1" and Ø2" Optics
  • 8-32 (M4) Tap for Post Mounting

LM1-B

Mounting Ring with Thumbscrew Retention

LM1-A

Optic Carriage

DLM1

Mounting Ring with
Magnetic Retention
(Includes Two DLM1-A
Carriages)

DLM1-A

Optic Carriage

DLM1-A

Optic Carriage

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Features

  • Optic Mounts with Interchangeable Rotating Optic Carriage
  • SM1- (1.035"-40) or SM2-Threaded (2.035"-40) Optic Carriage
  • Retaining Ring(s) Included for Secure Optic Mounting
  • Laser Engraved Scale with Graduations Every 2°, Labeled Every 20°
  • 8-32 (M4) Tap for Post Mounting

These nested lens mounts systems consist of an inner optic carriage that rotates within the outer mounting ring. Single (LM1-B and LM2-B) and dual (DLM1) rotational optic versions are available. The optic carriages are radially laser engraved to allow for precise rotational changes. The optic carriages are retained within the mounting ring by either a thumbscrew or magnetic attachment. Additional optic carriages can be purchased and used for easy exchange of optics. 

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
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
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 LensesCCD/CMOS Cameras
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
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
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
SM2 Threading: Ø2" Lens Tubes, 60 mm Cage Systems
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
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"

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, or an Elliptec resonant piezo motor. Each offers 360° of continuous rotation.

Manual Rotation Mounts

Rotation Mounts for Ø1/2" Optics
Item # RSP05(/M) CRM05 PRM05(/M)a SRM05 KS05RS CT104
Click Photo
to Enlarge
Features 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
  • This mount is available in the PRM05GL5 bundle, which includes the PRM05 rotation mount with the SM05PM5 polarizing prism mount.
  • The CT104 is complatible with the 1/4" translation stages using our MS103(/M) adapter plate.
  • The CT104 is compatible with the CT1 cage translation stage, which is designed for use with 30 mm cage systems.

Rotation Mounts for Ø1" Optics
Item # RSP1(/M) LRM1 RSP1D(/M) DLM1(/M) CLR1(/M) RSP1X15(/M) RSP1X225(/M) PRM1(/M)a
Click Photo
to Enlarge
LRM1
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
  • This mount is available in the PRM1GL10 bundle, which includes the PRM1 rotation mount with the SM1PM10 polarizing prism mount.

Rotation Mounts for Ø1" Optics
Item # LM1-A &
LM1-B(/M)
CRM1(/M) CRM1L(/M) CRM1P KS1RS K6XS
Click Photo
to Enlarge
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
  • This mount also features four 4-40 (M3) holes on the rotation dial for use with the K6A1(/M) prism platform.

Rotation Mounts for Ø2" Optics
Item # RSP2(/M) RSP2D(/M) PRM2(/M) LM2-A &
LM2-B(/M)
LCRM2(/M) KS2RS
Click Photo to Enlarge
Features Standard Adjustable
Zero
Micrometer Optic Carriage Rotates Within Mounting Ring 60 mm Cage-Compatible ±4° Kinematic Tip/Tilt Adjustment Plus Rotation
Additional Details

Manual Rotation Stages

Manual Rotation Stages
Item # RP005(/M) MSRP01(/M) RP01(/M) RP03(/M) QRP02(/M) PR01(/M) CR1(/M) XYR1(/M)a
Click Photo
to Enlarge
Continuous Rotation Mount
Features Standard Two Hard Stops SM1-Threaded
Central Aperture
Fine Pitch
Worm Gear
Rotation Plus 1/2" Linear XY Translation
Additional Details
  • This stage is available in the OCT-XYR1(/M), which includes the XYR1(/M) stage with the XYR1A solid plate platform adapter.

Motorized Rotation Mounts and Stages

Motorized Rotation Mounts and Stages
Item # DDR25(/M) K10CR1(/M) PRM1Z8(/M)a PRMTZ8(/M)b NR360S(/M)
Click Photo
to Enlarge
Features Compatible with
SM05 Lens Tubes,
16 mm Cage System,
30 mm Cage System
Compatible with SM1 Lens Tubes and
30 mm Cage System
Tapped Mounting Platform for Mounting Prisms or Other Optics SM2-Threaded Central Aperture
Additional Details
  • This stage is available in the KPRMTE(/M), which includes the PRMTZ8(/M) Motorized Rotation Stage with the KDC101 K-Cube DC Servo Motor Controller.
  • This stage is available in the KPRM1E(/M), which includes the PRMT1Z8(/M) Motorized Rotation Stage with the KDC101 K-Cube DC Servo Motor Controller.

Posted Comments:
jjurado  (posted 2011-09-02 14:06:00.0)
Response from Javier at Thorlabs to wjlentz: Thank you very much for your feedback. We will look into offering a version for 3" diameter optics of our LM1 and LM2 mounts. I will contact you directly for further discussion.
wjlentz  (posted 2011-09-01 14:38:13.0)
I need the 3" version of the rotating optical mount.

Nested Rotation Mount for Ø1" Optics


Click to Enlarge

The optic carriage is locked in place by a thumbscrew and can be easily removed from the main body of the mount.
  • Mount Ø1" Optics up to 0.37" (9.4 mm) Thick
  • Optic Carriage (LM1-A) and Mounting Ring (LM1-B or LM1-B/M) Sold Separately
  • Rotating Optic Carriage is Interchangeable for Quick Swapping
  • SM1-Threaded Optic Bore in Rotating Optic Carriage
  • Post Mountable via 8-32 (M4) Tap
  • Laser Engraved Graduation Marks Every 2° Labeled Every 20°

The LM1-A optic carriage can be nested inside of the LM1-B (LM1-B/M) mounting ring and offers 360° of continuous rotation for Ø1" optics. The optic bore of the LM1-A carriage features internal SM1 (1.035"-40) threading and can hold an optic up to 0.37" (9.4 mm) thick with the included SM1RR retaining ring or an optic in an SM1-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 LM1-A interchangeable rotating carriages are available to allow optics to be swapped out quickly and 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 LM1-A is properly fastened in the LM1-B by the thumbscrew, the optic axis is 1.04" (26.3 mm for the LM1/B) above the top of the post.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
LM1-B Support Documentation
LM1-BRotation Mounting Ring for LM1-A Ø1" Optic Carriage, 8-32 Tap
$24.17
Today
+1 Qty Docs Part Number - Universal Price Available / Ships
LM1-A Support Documentation
LM1-ARotating Inner Carriage for Ø1" Optics, One SM1RR Retaining Ring
$20.81
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
LM1-B/M Support Documentation
LM1-B/MRotation Mounting Ring for LM1-A Ø1" Optic Carriage, M4 Tap
$24.17
Today

Dual Nested Rotation Mount for Ø1" Optics


Click to Enlarge

The rotating optic carriages can be easily removed from the main body of the mount.
  • Mount Two Ø1" Optics up to 0.25" (6.4 mm) Thick
  • Two Optic Carriages (DLM1-A) Included with DLM1
  • Each Optic Carriage Rotates Independently
  • Rotating Optic Carriages are Interchangeable for Quick Swapping
  • SM1-Threaded Optic Bore in Each Rotating Optic Carriage
  • Two SM1RR Retaining Rings Included
  • Post Mountable via 8-32 (M4) Tap

The DLM1(/M) Dual Rotation Mount includes two independently rotating carriages (item # DLM1-A) for Ø1" optics that offer 360° of continuous rotation. The optic bore of the DLM1-A carriage features internal SM1 (1.035"-40) threading and can hold an optic up to 0.25" (6.4 mm) thick with the included SM1RR retaining ring or an optic in an SM1-threaded housing. The carriages magnetically attach to the main body of the mount. To remove a carriage from the mount, simply pull the carriage off the main body. Another carriage can then be snapped on in its place. Extra DLM1-A interchangeable rotating carriages are available to allow optics to be swapped out quickly and easily.

Each carriage has a knurled edge for adjusting rotation and a 360° laser-engraved scale marked at 2° increments for precise, repeatable positioning. Two top-located setscrews can be tightened with a 5/64" (2.0 mm) hex key or balldriver to lock the rotation of the optic carriages independently. When the rotation is locked, the double bore on the mount maintains a stable, three-point contact to hold the optic carriage.

The DLM1 mount is designed to put the optic axis 1.00" (25.0 mm for the DLM1/M) above the top of the post When two optics are mounted, the separation between them is 0.30" (7.6 mm). The dual rotation mount is ideal for creating variable polarizers and attenuators by mounting linear polarizers and wave plates in close proximity without having to align the optic axes of two separate rotation mounts. We do not recommend using this mount with lens tubes, as the torque applied to the optic bore may overcome the magnetic attachment.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
DLM1 Support Documentation
DLM1Dual Rotation Mount for Ø1" Optics, Two Interchangeable Rotating Carriages, 8-32 Tap
$125.00
Today
+1 Qty Docs Part Number - Universal Price Available / Ships
DLM1-A Support Documentation
DLM1-AInterchangeable Rotating Carriage for DLM1(/M), One SM1RR Retaining Ring
$30.00
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
DLM1/M Support Documentation
DLM1/MDual Rotation Mount for Ø1" Optics, Two Interchangeable Rotating Carriages, M4 Tap
$125.00
Today

Nested Rotation Mount for Ø2" Optics

  • 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.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
LM2-B Support Documentation
LM2-BRotation Mounting Ring for LM2-A Ø2" Optic Carriage, 8-32 Tap
$30.60
Today
+1 Qty Docs Part Number - Universal Price Available / Ships
LM2-A Support Documentation
LM2-ARotating Inner Carriage for Ø2" Optics, One SM2RR Retaining Ring
$27.54
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
LM2-B/M Support Documentation
LM2-B/MRotation Mounting Ring for LM2-A Ø2" Optic Carriage, M4 Tap
$30.60
Today
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