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Features

  • Clamps and Brackets Provide a Means to Support Cage Segments with Posts
  • Solutions Available for 16 mm, 30 mm, and 60 mm Cage Systems
  • Options for Mini Series, Ø1/2", Ø1", and Ø1.5" Posts
  • CRA30 Connects a 30 mm Cage Segment to a PR01 Rotation Stage

Thorlabs introduced Cage Systems to ensure compatibility over a broad range of product lines. Cage System components offer a simple and efficient solution for building optomechanical structures. The Cage System compatible products include lens tubes, fixed mounts, kinematic mounts, and irises to provide flexibility when constructing complex optical systems.

Mounting a Cage System to a Post
The SMB1 (16 mm), CP02B (30 mm), and the LCP01B (60 mm) Cage Mounting Brackets are secured to two cage rods and allow the cage to be mounted to a post via a counterbored hole. The SMB1 offers one 4-40 (M3) counterbore, while the CP02B and LCP01B have three 8-32 (M4) counterbores.

The C10 series is offered in three versions, one for each cage size, and mounts a cage to a Ø1" post. The C15 series is also available for each cage size, but it clamps to a Ø1.5" post. These clamps provide a way to quickly connect or disconnect a cage system, thus allowing for interchanging cage setups.

Basic Square Cage Plate
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 System16 mm30 mm60 mm
Thread SeriesSM05SM1SM2
Rod to Rod Spacing16 mm (0.63")30 mm (1.18")60 mm (2.36")
Total Length25 mm (0.98")41 mm (1.60")71.1 mm (2.8")
Cage Components
Cage Rods16 mmThese 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 Plates16 mmThese 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 Mounts16 mmThorlabs offers fixed, kinematic, rotation, and translation mounts specifically designed for our Cage Systems.
30 mm
60 mm
Cage Cubes16 mmThese 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 AdaptersMounting 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 AdaptersCage System Size Adapters can be used to integrate components from different cage system and threading standards.
Specialized ComponentsThorlabs 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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16 mm Cage Mounting Bracket
  • Compatible with 16 mm Cage Systems
  • Two Through Holes for use with SR Series Rods
  • Mounting Hole Compatible with 4-40 (M3 x 0.5) Screws

The SMB1 provides a compact mounting option when working with our compact cage system. The slim, low-profile design is ideal for incorporating 16 mm Cage Systems into an optomechanical assembly.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
SMB1 Support Documentation SMB1 Compact 16 mm Cage Mounting Bracket $16.00
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30 mm Cage Plate Adapter
  • Compatible with 30 mm Cage Systems
  • Three #8 (M4) Counterbores for Post Mounting and OEM Applications
  • Cage Rods (Not Included) are Locked into Place with Side-Located Setscrews

The CP02B provides a compact mounting option for incorporating 30 mm Cage Systems into optomechanical assemblies. Three #8 (M4) counterbored mounting holes allow this adapter to be used with our standard post and post holders in addition to OEM applications, which require secure mounting into a larger system (post and post holder not included).

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
CP02B Support Documentation CP02B 30 mm Cage Plate Adapter $14.00
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60 mm Cage Plate Adapter
  • 60 mm Cage System Compatible
  • Flexure Cut Design for Increased Stability
  • Firmly Lock onto Ø6.0 mm ER Rods (Not Included) via Side-Located Cap Screws

The LCP01B allows 60 mm Cage Systems to be incorporated into other optomechanical assemblies. This cage plate adapter has a flexure cut design for increased stability. It has two Ø0.24" (Ø6.0 mm) through holes with cap screws that firmly lock Ø6.0 mm ER Rods (not included) in place. It has three 8-32 (M4) counterbored holes for post mounting and has been specially designed to provide clearance for SM2 Lens Tubes as shown in the photo on the right.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
LCP01B Support Documentation LCP01B Customer Inspired! 60 mm Cage Plate Adapter $29.00
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Ø1" (Ø25 mm) Post Cage Clamp Mount
  Quick-Connect Cage Clamp
  Easy Drop-In/Drop-Out of Cage Systems
  Single Locking Screw Allows One-Handed Operation
  Compatible with Ø1" (Ø25 mm) RS Series Posts

The C1026 (C1026/M) and C1060 (C1060/M) relief cut clamps for Ø1" (Ø25 mm) posts are designed to support 30 mm and 60 mm cage systems, respectively. Two parallel cage rods can be placed in the clamp and with a single screw they can be locked in place. In this way, complete sections of cage systems can be supported by a single post as can be seen in the application image at the top of the page. The clamp itself has a precision Ø1" hole bored through it with a relief cut. A 1/4"-20 (M6) caphead screw can be tightened to compress the gap created by the relief cut, which results in the C10 Series being secured to the Ø1" (Ø 25 mm) post with a great deal of force.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
C1026 Support Documentation C1026 30 mm Cage Clamp for Ø1" Posts $71.00
3-5 Days
C1060 Support Documentation C1060 60 mm Cage Clamp for Ø1" Posts $79.00
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C1026/M Support Documentation C1026/M 30 mm Cage Clamp for Ø25 mm Posts, Metric $71.00
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C1060/M Support Documentation C1060/M 60 mm Cage Clamp for Ø25 mm Posts, Metric $79.00
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Ø1.5" Post Cage Clamp Mounts
  • Securely Attach 30 mm or 60 mm Cage Assemblies to our Ø1.5" P-Series Posts
  • Quick-Connect Mechanism for Fast Drop-In/Drop-Out of Cage Assemblies
  • Two 8-32 (M4) Tapped Holes are Provided for Optic Mounts with #8 (M4) Counterbored Holes
  • An Additional 3/16" (5 mm) Hex Cap Screw is Provided as the Main Quick-Connect Cage Clamping Mechanism

The application to the right shows the C1526 supporting a cage system composed of 4 ER6 cage rods, an SM1Z Z-Axis Translation Mount, and a CP02T cage plate. This system can be used as a telescope to expand or contract the beam diameter using lenses of appropriate focal length placed in the Z-axis mount and cage plate.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
C1526 Support Documentation C1526 30 mm Cage Clamp for Ø1.5" Posts $71.00
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C1560 Support Documentation C1560 60 mm Cage Clamp for Ø1.5" Posts $79.00
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+1 Qty Docs Part Number - Metric Price Available / Ships
C1526/M Support Documentation C1526/M 30 mm Cage Clamp for Ø1.5" Posts, Metric $71.00
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C1560/M Support Documentation C1560/M 60 mm Cage Clamp for Ø1.5" Posts, Metric $79.00
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Ø1.5" Post Vertical Cage Clamp Mounts
  • Mount 30 mm Cage Systems Vertically to Our 1.5" Posts
  • Quick-Connect Mechanism for Fast Drop-In/Drop-Out of Cage Assemblies
  • Spaced such that the Optical Axis of the 30 mm Cage System Aligns with Tabbed Holes of the Imperial Breadboards (Not Applicable to Metric Breadboards)
  • 15 lb (6.8 kg) Load Capacity

The application to the right shows the CV1526 mount supporting a 30 mm cage system in a vertical orientation. The assembly is composed of four ER4 cage rods, an SM1Z Z-Axis Translation Mount, and a CP02T cage plate. This configuration can be used in a variety of applications including the inspection station shown to the right, which consists of a CMOS Camera, a Camera Lens, and a Microscope Objective.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
CV1526 Support Documentation CV1526 Customer Inspired! 30 mm Vertical Cage Clamp Mount for Ø1.5" Posts $170.00
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+1 Qty Docs Part Number - Metric Price Available / Ships
CV1526/M Support Documentation CV1526/M Customer Inspired! 30 mm Vertical Cage Clamp Mount for Ø1.5" Posts, Metric $170.00
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30 mm Cage Rotation Adapter
  • Rotate a 30 mm Cage Segment 360°
  • Compatible with PR01 Rotation Stage
  • One-Handed Clamping Mechanism

The CRA30 is an adapter that connects a 30 mm cage segment to a PR01 (PR01/M) rotation stage. This configuration allows a cage segment to be rotated 360° and precisely aligned via the stage's micrometer. The adapter uses a single screw clamping mechanism that, when tightened, clamps on to two rods of a 30 mm cage assembly. This clamping mechanism allows a cage system to be built and attached to the adapter as the cage rods do not need to be fed through the adapter.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
CRA30 Support Documentation CRA30 30 mm Cage-Compatible Rotation Adapter for PR01 $78.00
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+1 Qty Docs Part Number - Metric Price Available / Ships
CRA30/M Support Documentation CRA30/M 30 mm Cage-Compatible Rotation Adapter for PR01/M, Metric $78.00
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