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Ø2" Rotating Adjustable-Length Lens Tube


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Ø2 Rotating Adjustable-Length Lens Tube

Features

Item #TravelOptic Accommodated Rotates
SM2NR11.16" (29 mm)Ø1"No
SM2V100.81" (20.7 mm)Ø2"Yes
  • Precise Positioning of Optics within SM2 Lens Tube Systems
  • Up to 1.16" (29 mm) of Travel Along the Optical Axis
  • Internally and Externally SM2 (2.035" -40) Threaded
  • Rotating and Non-Rotating Designs Available

Adjustable length lens tubes allow for the adjustment of an optic's position along the optical axis within a lens tube system. The SM2NR1 provides 1.16" (29 mm) of non-rotating adjustment at 17 mm per revolution for a Ø1" optic; it can be mounted between two fixed lens tubes. The SM2V10 is designed to house a Ø2" optic; the rotating design offers 0.81" (20.7 mm) of travel.

AlternativesØ1/2", Ø1", and Ø3" Adjustable Length Lens TubesØ1" Non-Rotating Adjustable Focus Lens Tube

SM Series 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. For threading specifications other than what is listed here, please contact Tech Support.

SM05 Threading: Ø1/2" Lens Tubes, 16 mm Cage Systems
External Thread, 0.535"-40.0, UNS-2AInternal Thread, 0.535"-40.0, UNS-2B
Max Major Diameter0.5340"Min Major Diameter0.5350"
Min Major Diameter0.5289"Min Pitch Diameter0.5188"
Max Pitch Diameter0.5178"Max Pitch Diameter0.5230"
Min Pitch Diameter0.5146"Min Minor Diameter (and 83.3% of thread)0.508"
Max Minor Diameter0.5069"Max Minor Diameter (and 64.9% of thread)0.514"
SM1 Threading: Ø1" Lens Tubes, 30 mm Cage Systems
External Thread, 1.035"-40.0, UNS-2AInternal Thread, 1.035"-40.0, UNS-2B
Max Major Diameter1.0339"Min Major Diameter1.0350"
Min Major Diameter1.0288"Min Pitch Diameter1.0188"
Max Pitch Diameter1.0177"Max Pitch Diameter1.0234"
Min Pitch Diameter1.0142"Min Minor Diameter (and 83.3% of thread)1.008"
Max Minor Diameter1.0068"Max Minor Diameter (and 64.9% of thread)1.014"
SM30 Threading: Ø30 mm Lens Tubes
External Thread, M30.5x0.5Internal Thread, M30.5x0.5
Max Major Diameter30.480 mmMin Major Diameter30.500 mm
Min Major Diameter30.371 mmMin Pitch Diameter30.175 mm
Max Pitch Diameter30.155 mmMax Pitch Diameter30.302 mm
Min Pitch Diameter30.059 mmMin Minor Diameter (and 83.3% of thread)29.959 mm
Max Minor Diameter29.938 mmMax 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-2AInternal Thread, 2.035"-40.0, UNS-2B
Max Major Diameter2.0338"Min Major Diameter2.0350"
Min Major Diameter2.0287"Min Pitch Diameter2.0188"
Max Pitch Diameter2.0176"Max Pitch Diameter2.0239"
Min Pitch Diameter2.0137"Min Minor Diameter (and 83.3% of thread)2.008"
Max Minor Diameter2.0067"Max Minor Diameter (and 64.9% of thread)2.014"
SM3 Threading: Ø3" Lens Tubes
External Thread, 3.035"-40.0, UNS-2AInternal Thread, 3.035"-40.0, UNS-2B
Max Major Diameter3.0337"Min Major Diameter3.0350"
Min Major Diameter3.0286"Min Pitch Diameter3.0188"
Max Pitch Diameter3.0175"Max Pitch Diameter3.0242"
Min Pitch Diameter3.0133"Min Minor Diameter (and 83.3% of thread)3.008"
Max Minor Diameter3.0066"Max Minor Diameter (and 64.9% of thread)3.014"
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Non-Rotating Adjustable Lens Tube
SM2NR1
Click to Enlarge
SM2NR1 can be mounted between two fixed lens tubes.
  • Precise Positioning of Optics within Lens Tube Systems without Rotation
  • 1.16" (29 mm) of Non-Rotating Adjustment at 17 mm Per Revolution
  • Mounts Ø1" Optics with Included SM1RR Retaining Ring
  • Mounts Between Two Fixed SM2 Lens Tubes

Thorlabs' SM2NR1 provides 1.16" (29 mm) of non-rotating adjustment for Ø1" optics in a lens tube system. The SM2NR1 is SM2-threaded (2.035"-40) and can be mounted between two fixed lens tubes. It contains an internal SM1 Threaded cell where optics are installed using the included SM1RR retaining ring. A double helical mechanism moves the optic back and forth while restricting any rotational movement.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SM1RR Support Documentation
SM1RR SM1 Retaining Ring for Ø1" Lens Tubes and Mounts
$4.50
Today
SM2NR1 Support Documentation
SM2NR1 Ø2" SM2 Non-Rotating Zoom Housing for Ø1" Optics, 1.56" Travel
$204.00
Today
Rotating Adjustable Length Lens Tube
SM2V10
Click to Enlarge
Simplified Mechanical Drawing of SM2V10
  • Precise Positioning of Optics within Lens Tube Systems
  • 0.81" of Rotating Adjustment Along the Optical Axis
  • Internally and Externally SM2 Threaded
  • Mounts Ø2" Optics with included SM2RR Retaining Ring
This SM2-threaded (2.035"-40) adjustable-length lens tube provides 0.81" of adjustment for Ø2" optics in a lens tube system. Optics are mounted using an included SM2RR retaining ring, and the adjustable-length lens tube is threaded into a compatible lens tube or mount to adjust the position of the optic. The included locking ring can be used to fix the position of the optic. Although a lens tube can be attached to the front of the adjustable-length lens tubes, it should only be done after the position of the optic has been fixed since this lens tube will need to be free to rotate and translate if the position of the optic is changed.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SM2RR Support Documentation
SM2RR SM2 Retaining Ring for Ø2" Lens Tubes and Mounts
$6.75
Today
SM2V10 Support Documentation
SM2V10 Ø2" SM2 Rotating Adjustable Focusing Element, 0.81" Travel
$47.00
Today
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