HeNe SM2 Lens Tube Adapter


HeNe to 60 mm Cage System Adapter Plate

  • Mount Ø1.75" HeNe Laser in 60mm Cage Systems
  • SM2 (2.035"-40) Lens Tube and Ø1/2" and Ø1" Post Compatible
  • ±1.0 mm of X and Y Translation for Alignment


  • 60 mm Cage and SM2 (2.035"-40) Lens Tube System Compatible
  • Ø1/2" and Ø1" Post Mountable
  • Double-Bore Mounting Design
  • Compatible with All Lengths of Ø1.75" HeNe Laser Sources
  • ±1.0 mm of Manual X and Y Translation
  • 4.5" Overall Length

The HCM2 Adapter Plate is designed to enable integration of a standard Ø1.75" cylindrical HeNe laser into a 60 mm cage system or SM2 (2.035"-40) lens tube system. The HCM2 allows ±1.0 mm of coarse X & Y manual translation for positioning of the laser source. Four horizontally opposed 5/64" (2 mm) hex screws (two per side) ensure easy locking from any orientation, while the slip-plate design provides smooth, easy adjustments. Two 8-32 (M4 x 0.7) tapped mounting holes allow the HCM2 to be mounted on our standard Ø1" (Ø25 mm) or Ø1/2" posts. A pair of double-bored mounting plates ensures a true 3-point contact for stable mounting of the HeNe laser.


Cage System Overview

The Cage Assembly System provides a convenient way to construct large optomechanical systems with an established line of precision-machined building blocks designed for high flexibility and accurate alignment.

16 mm, 30 mm, and 60 mm Cage System Standards

Thorlabs offers three standards defined by the center-to-center spacing of the cage assembly rods (see image to right). The 16 mm cage, 30 mm cage, and 60 mm cage standards are designed to accomodate Ø1/2", Ø1", and Ø2" optics, respectively. Specialized cage plates that allow smaller optics to be directly inserted into our larger cage systems are also available. All locking setscrews used in these cage plates are standard 4-40 setscrews, which use a 0.05" hex key.

Standard Threads

The flexibility of our Cage Assembly System stems from well-defined mounting and thread standards designed to directly interface with a wide range of specialized products. The three most prevalent thread standards are our SM05 Series (0.535"-40 thread), SM1 Series (1.035"-40 thread), and SM2 Series (2.035"-40 thread), all of which were defined to house the industry's most common optic sizes. Essential building blocks, such as our popular lens tubes, directly interface to these standards.


Standard Cage System Measurements
Cage System 16 mm 30 mm 60 mm
Thread Series SM05 SM1 SM2
Rod to Rod Spacing 16 mm (0.63") 30 mm (1.18") 60 mm (2.36")
Total Length 25 mm (0.98") 41 mm (1.60") 71.1 mm (2.8")
Cage Components
Cage Rods 16 mm These rods are used to connect cage plates, optic mounts, and other components in the cage system. The SR Series Cage Rods are compatible with our 16 mm cage systems, while the 30 mm and 60 mm cage systems use ER Series Cage Rods.
30 mm
60 mm
Cage Plates 16 mm These serve as the basic building blocks for a cage system. They may have SM-threaded central bores, smooth bores sized for industry standard optics or to accommodate the outer profile of our SM Series Lens Tubes, or specialized bores for other components such as our FiberPorts.
30 mm
60 mm
Optic Mounts 16 mm Thorlabs offers fixed, kinematic, rotation, and translation mounts specifically designed for our Cage Systems.
30 mm
60 mm
Cage Cubes 16 mm These cubes are useful for housing larger optical components, such as prisms or mirrors, or optics that need to sit at an angle to the beam path, such as beamsplitters. Our cage cubes are available empty or with pre-mounted optics.
30 mm
60 mm
Post and Breadboard Mounts and Adapters Mounting options for cage systems can be found on our Cage System Construction pages. Cage Systems can be mounted either parallel or perpendicular to the table surface.
Size Adapters Cage System Size Adapters can be used to integrate components from different cage system and threading standards.
Specialized Components Thorlabs also produces specialized cage components, such as Filter Wheels, a HeNe Laser Mount, and a FiberPort Cage Plate Adapter, allowing a wide range of our products to be integrated into cage-mounted optical systems. Explore our Cage Systems Visual Navigation Guide to see the full range of Thorlabs' cage components.


Our Mission is to accelerate the advancement of optical technology for precision measurements and their applications from the table tops of research laboratories to standard use in communication and high technology industries. Our aim is to serve our customers. Our hope is to create a place for highly skilled people in an open environment

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