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Vacuum-Compatible, Stackable Lens Tubes
0.30" Thread Depth
0.30" Thread Depth
0.50" Thread Depth
1.00" Thread Depth
Vents along the lens tube threading allow for air to easily pass mounted optics.
Item # Engraved Above External Threading
Additional Vacuum-Compatible Components
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Vents along the threading and at the ends of these tubes provide a free path for air to escape when under vacuum.
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.
Vacuum Compatibility Information
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.
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.
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.
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.