Features

Switch Between Cage Sizes with Adapters
16 mm to 30 mm and 30 mm to 60 mm Adapters Available

The SP05(/M) and LCP02(/M) cage adapter plates offer a way to switch between 16 mm and 30 mm cages, and 30 mm and 60 mm cages, respectively. Each cage plate has four through holes for cage rods, which are secured in the plate using setscrews.

An example of the standard cage
plate measurements determining
cage system compatibility.

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.

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.

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Posted Comments:

Poster: Javier

Posted Date: 2010-06-10 15:17:42.0

Response from Javier at Thorlabs to jc7: we may be able to offer this as a special item. I will contact you with more information.

Poster: jc7

Posted Date: 2010-06-10 12:57:34.0

For the 30 mm to 60 mm Cage Plate Adapter (LCP02), is it possible to include a Nylon-Tipped Thumbscrew to fix Ø1" optics instead of SM1 threads? Thanks, James

Poster: apalmentieri

Posted Date: 2009-12-15 12:08:16.0

A response from Adam at Thorlabs: If we were to open up the radius on the CP02B to clear the lens tube cover it would still make contact with the middle screw with the use of either an English or metric screw. Unfortunately, we cannot make this change.

Poster: bowen

Posted Date: 2009-12-11 17:51:48.0

You make a plastic tube to fit over SM1 lens tubes. That tube does not fit with the CP02B. You should modify the CP02B so there is no interference.

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Cage System Adapters

Features

Cage System Overview

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

Standard Threads