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Vacuum-Compatible, Stackable Lens Tubes


  • Lens Tubes Mount Either Ø1/2" (12.7 mm) or Ø1" (25.4 mm) Optics
  • SM05 or SM1 Thread Standard Used Throughout Thorlabs' Product Line
  • Vented Design to Reduce Air Pockets Under Vacuum

SM05L03V

0.30" Thread Depth

SM1L03V

0.30" Thread Depth

SM1L05V

0.50" Thread Depth

SM1L10V

1.00" Thread Depth

Vents along the lens tube threading allow for air to easily pass mounted optics.

Item # Engraved Above External Threading

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Additional Vacuum-Compatible Components

Many of our other optomechanical components can be special ordered for vacuum use. Contact techsupport@thorlabs.com for details.

Vacuum Specifications
Vacuum Compatibility
as Packageda
>10-6 Torr
Materials 6061-T6 Aluminum
Preparation and
Packaging
Chemically Cleaned and
Double Vacuum-Bagged
Aluminum Outgassing
Rate at 20 °C
7.6 x 10-9 Torr-Liters/s/cm2
  • This is the pressure at which these components can be used with no additional processing. They can be used at even lower pressures with additional cleaning and processing.
Vent in Vacuum Lens Tubes
Click to Enlarge

Vents along the threading and at the ends of these tubes provide a free path for air to escape when under vacuum.

Features

  • Ø1/2" Lens Tube, 0.30" (7.6 mm) Long
  • Ø1" Lens Tubes, 0.30" (7.6 mm), 0.50" (12.7 mm), or 1.00" (25.4 mm) Long
  • Compatible with SM05- or SM1-Threaded Vacuum Components
  • Lens Tubes Directly Accept Ø1/2" (Ø12.7 mm) or Ø1" (Ø25.4 mm) Optics

Lens Tubes are ideal for creating compact optical subassemblies with light-tight beam paths. The lens tubes sold here can be used to house one or several optical elements. The SM05-threaded lens tube is designed for Ø1/2" optics, while our SM1-threaded lens tubes fit Ø1" optics. These vacuum-compatible lens tubes feature venting channels along their threading and at the ends of each tube. These channels allow air trapped between mounted optics an easy means of escape during pumpdown.

Optics are separated and secured by vacuum-compatible retaining rings that are positioned along the length of the lens tube using a compatible spanner wrench, sold below. Each of the lens tubes on this page come with a compatible SM-threaded retaining ring. SM1RRV retaining rings can be purchased below as replacements for use with SM1-threaded lens tubes. SM05 retaining ring replacements can be ordered by contacting techsupport@thorlabs.com.

In addition to the lens tubes featured on this page, Thorlabs also offers Ø1/2", Ø1", Ø30 mm, Ø1.5", Ø2", and Ø3" versions for non-vacuum applications, each of which is equipped with an SM series thread standard that depends on the tube diameter (see the Threading Specs tab). Those lens tubes can be ordered as a vacuum-compablitble, vented version through techsupport@thorlabs.com.

Vacuum Compatibility Information
Our vacuum-compatible optomechanics are chemically cleaned and prepared for vacuum applications before packaging. They are compatible directly out of the packaging with vacuum environments down to 10-6 Torr. With additional cleaning and processing, they can be used at even lower pressures, only limited by the outgassing rate of the aluminum (see the table below). The material properties of the aluminum and the cleaning methods completed by the end user should be used to determine the appropriateness of these products and materials in a specific vacuum system.

Non-Vacuum-Compatible Alternatives Ø1/2", Ø1", Ø30 mm, Ø1.5", Ø2", and Ø3" Stackable Lens Tubes

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
SM1.5 Threading: Ø1.5" Lens Tubes
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
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"

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SM05-Threaded Vacuum-Compatible Stackable Lens Tube

SM05Lxx Lens Tube Diagram
  • Stackable Design Enables Multi-Element Optical Systems
  • Accepts Ø1/2" (12.7 mm) Optics
  • SM05-Threaded (0.535"-40) Bore
  • 0.30" Internal Thread Depth

This Ø1/2" lens tube, with its stackable design and ability to interface with other SM05-threaded components, can be used to house compact optical assemblies or as a building block in complex optomechanical systems. Made from 6061-T6 aluminum, this vented lens tube is vacuum compatible down to 10-6 Torr. One vacuum-compatible SM05-threaded retaining ring is included with each lens tube purchased; please contact Tech Support for replacement rings.

Item # L Internal Thread Depth
SM05L03V 0.33" (8.4 mm) 0.30" (7.6 mm)
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SM05L03V Support Documentation
SM05L03VNEW!Vacuum-Compatible SM05 Lens Tube, 0.30" Thread Depth, One Retaining Ring Included
$34.89
Today

SM1-Threaded Vacuum-Compatible Stackable Lens Tubes

SM1Lxx Lens Tube Diagram
  • Stackable Design Enables Multi-Element Optical Systems
  • Accepts Ø1" (Ø25.4 mm) Optics
  • SM1-Threaded (1.035"-40) Bore
  • 0.30", 0.50", and 1.00" Internal Thread Depths Available

These Ø1" lens tubes, with their stackable design and ability to interface with other SM1-threaded components, can be used to house compact optical assemblies or as a building block in complex optomechanical systems. Made from 6061-T6 aluminum, these vented lens tubes are vacuum compatible down to 10-6 Torr. One SM1RRV vacuum-compatible retaining ring is included with each lens tube.

Item # L Internal Thread Depth
SM1L03 0.33" (8.4 mm) 0.30" (7.6 mm)
SM1L05 0.53" (13.5 mm) 0.50" (12.7 mm)
SM1L10 1.03" (26.2 mm) 1.00" (25.4 mm)
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SM1L03V Support Documentation
SM1L03VNEW!Vacuum-Compatible SM1 Lens Tube, 0.30" Thread Depth, One Retaining Ring Included
$39.14
Today
SM1L05V Support Documentation
SM1L05VNEW!Vacuum-Compatible SM1 Lens Tube, 0.50" Thread Depth, One Retaining Ring Included
$39.67
5-8 Days
SM1L10V Support Documentation
SM1L10VNEW!Vacuum-Compatible SM1 Lens Tube, 1.00" Thread Depth, One Retaining Ring Included
$44.54
5-8 Days

Spanner Wrenches and Vacuum-Compatible Retaining Ring

  • Vacuum-Compatible Retaining Ring for Securing Ø1" Optics
  • Spanner Wrenches Provide One-Handed Adjustment of Retaining Rings
  • SPW801 Adjustable Spanner Wrench can Accommodate Diameters from 0.12" (3.0 mm) to 2.89" (73.4 mm)

Thorlabs offers the SM1RRV vacuum-compatible retaining ring for securing Ø1" optics in SM1-threaded (1.035"-40) components. Each 6061-T6 aluminum ring is shipped double-vacuum bagged and is vacuum compatible to 10-6 Torr.

To secure these retaining rings, we offer several spanner wrenchs. The SPW603 and SPW606 spanner wrenches are 1" long and can adjust SM05- and SM1-threaded retaining rings, respectively. The SPW602 spanner wrench is built for SM1-threaded retaining rings, and its 3.88" long body includes a graduated scale to help seat rings at a repeatable depth in a lens tube. The SPW801 adjustable spanner wrench can be resized for retaining rings as large as the SM3RR for Ø3" components. We also offer the SPB05 SM05 and SPB1 SM1 Spanner Bits, which can be used with a standard 1/4" hex driver (sold separately). The both bits are included as part of the SPB600 Spanner Wrench Bit Kit. Note that our spanner wrenches are neither rated for vacuum compatibility nor prepared for cleanroom use.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
SM1RRV Support Documentation
SM1RRVNEW!Vacuum-Compatible SM1 Retaining Ring for Ø1" Lens Tubes and Mounts
$10.94
Today
SPW603 Support Documentation
SPW603Spanner Wrench for SM05-Threaded Retaining Rings, Length = 1.00"
$26.00
Today
SPW606 Support Documentation
SPW606Customer Inspired! Spanner Wrench for SM1-Threaded Retaining Rings, Length = 1.00"
$28.38
Today
SPW602 Support Documentation
SPW602Spanner Wrench for SM1-Threaded Retaining Rings, Graduated Scale with 0.1"
(2.5 mm) Increments, Length = 3.88"
$28.38
Today
SPW801 Support Documentation
SPW801Adjustable Spanner Wrench
$103.97
Today
SPW102 Support Documentation
SPW102Adjustable Spanner Wrench, Replacement Blade Set
$30.24
Today
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