Adjustable Lens Mount for 60 mm Cage Systems

  • Mounts Optics from Ø1/2" (Ø12.7 mm) to Ø2" (Ø50.8 mm)
  • Non-Marring Delrin®* Mounting Fingers
  • SM2 Threaded and Post Mountable

Engraved Lines at
1 mm Spacings


60 mm Cage Compatible
Adjustable Lens Mount

Application Idea

LH160C Holding a Lens
in a 60 mm Cage System

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LH160C(/M) Features


  • Mounts Optics from Ø0.50" (Ø12.7 mm) to Ø2.00" (Ø50.8 mm)
  • 4 Through Holes on 60 mm Centers for Our Cage Rods
  • SM2-Threaded (2.035"-40) for Compatibility with SM2 Lens Tubes
  • Laser-Engraved Millimeter Scale Helps Center Optics
  • Reversible Delrin®* Fingers Have a Flat Side and a V-Shaped Side
  • 8-32 (M4) Tapped Hole for Mounting to Ø1/2" Posts

Thorlabs' LH160C(/M) Adjustable Lens Mount is compatible with our 60 mm Cage Systems and is ideal for general-purpose mounting of non-standard optic sizes. The non-marring Delrin fingers can be individually adjusted for unusual shapes in addition to being reversible, providing a flat side and a V-shaped side. The optic or object may be manually aligned and then locked into place by tightening the three black thumbscrews in the Delrin fingers. The aluminum mount and Delrin fingers have laser-engraved witness lines and millimeter scales, respectively. The scales on the fingers offer minor ticks every 1 mm and major ticks spaced 5 mm apart. These ticks along with the engraved lines allow for more repeatable positioning and help with optic centration within the mount.

The mount features four through holes compatible with our Ø6.0 mm cage rods and 60 mm cage system. Two 0.05" (1.3 mm) hex setscrews for each rod lock the mount into place. The mount also features SM2 (2.035"-40) threading for compatibility with our SM2 Lens Tubes and a bottom-located 8-32 (M4) tapped hole that allows for direct mounting to our Ø1/2" Posts. Please note that the three Delrin fingers prohibit mounting SM2-threaded components on the front of the LH160C(/M) mount.

*Delrin is a registered trademark of DuPont Polymers, Inc.

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 below). The 16 mm cage, 30 mm cage, and 60 mm cage standards are designed to accommodate 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.

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.

An example of the standard cage plate measurements determining cage system compatibility.
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 (2.80")
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
Replacement Setscrews Replacement setscrews are offered for our 16 mm (SS4B013, SS4B025, and SS4B038) and 30 mm (SS4MS5 and SS4MS4) cage systems products.
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.

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