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30 mm Cage Cube Platforms


  • Provides Stable Platform to Mount Optics Within Cubes
  • Available with Rigid or Kinematic Options
  • Compatible with 30 mm Cage Cubes and Optic Holders

Application Idea

B3C Platform with FFM1 Dichroic Filter Holder, Post Mounted in a C6W 30 mm Cage Cube

Bottom

B3C

Rigid Platform

B4C

Kinematic Platform

Top

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30 mm Cage Cubes and Accessories
30 mm Cage Cubes Optic Mounts Platforms Rotating Platforms Cage Plates
Cage Cubes Optic Mounts Platforms Rotating Platforms Cover Plates

Features

  • 30 mm-Cage-Cube-Compatible Platforms
  • Fixed or Kinematic Options Available
  • Platforms Rotate to Nearly Any Angle

The 30 mm cage cube platforms offered here are designed to hold our 30 mm cage cube optic mounts. These platforms are ideal for building optical setups involving prisms, beamsplitters, and other optics that are compatible with our 30 mm cage system. The platforms featured here can be mounted to either the top or bottom of a 30 mm cage cube (see video to the bottom left) and may also be post mounted. Before locking the platforms onto a cage cube, they can be rotated to nearly any angle, giving the user control over the position of the optic within a cage cube. The B4C platform offers additional kinematic translation via three setscrews located on the bottom of the platform.

When using these platforms with a C6W cage cube, there will be insufficient clearance to pass the two cage rods nearest the platform all the way through the cage cube. For the B3C and B4C platforms, the C6WA Mounting Adapter can be used to provide clearance for all four cage rods without sacrificing mounting surface area (see video to the bottom right). Alternatively, the cage rods can still be passed through the through holes opposite the rotating platform, or the C6W can be turned 90° with all four cage rods threaded into the 4-40 holes on opposite sides of the C6W.

Animation demonstrating how to attach a platform to a 30 mm cage cube.

Animation demonstrating how the C6WA Platform Adapter allows cage rods to pass through a 30 mm cage cube.

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 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.


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 (2.8")
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:
Posted Date:2017-06-29 15:04:21.137
why you did different screw pattern/size in C6WA/M compare for example B4C/M? right now I cannot use FFM1 with it.
Poster:tfrisch
Posted Date:2017-08-03 02:53:25.0
Hello, thank you for contacting Thorlabs and for bringing this limitation of the adapter plate to our attention. I've posted this in our internal engineering forum, but you can also reach out to us directly at TechSupport@Thorlabs.com to request a custom with the M3 holes spaced 1" to mount the FFM1.
Poster:carlos.macias
Posted Date:2016-05-31 15:19:38.45
hello. What is the size of the adjustment screws on the B4C/M?
Poster:besembeson
Posted Date:2016-06-02 01:32:32.0
Response from Bweh at Thorlabs USA: We use a 1/4"-80 fine hex adjuster set screw (similar to F25SS050) which uses a 2mm Hex for adjustment. We also have the drawing for part on our website: http://www.thorlabs.com/thorcat/1500/B4C_M-AutoCADPDF.pdf

Fixed Cage Cube Platforms


Click to Enlarge
The B3C and B4C Attached to C4W and C6W Cage Cubes to Allow Optics to be Mounted Inside
  • Mounts at Almost Any Angle Within C4W and C6W Cubes
  • B3C: Eight 4-40 Tapped Holes
  • B3C/M: Four M4 and Four M3-Tapped Holes
  • Includes Four 4-40 Button-Head Screws

The B3C fixed cage cube platform mounts onto the top or bottom of our 30 mm cage cubes. This platform can be coarsely rotated while inside the cage cube prior to being locked down at almost any angle with the included 4-40 button-head screws and 1/16" hex key. The tapped holes on the B3C platform are ideal for mounting the 30 mm cage optic mounts. The metric M4-tapped holes may be used with our PM3/M clamping arm to hold items such as prisms.

The B3C(/M) platform is rigid and only offers coarse rotation positioning, while the B4C(/M) platform (offered below) has three adjusters to provide pitch, roll, and Z translation in addition to rotational positioning. The bottom of this platform has an 8-32 (M4)-tapped hole, thereby allowing it to be mounted onto a Ø1/2" post.

For a continuous or precision rotation adjustment, please see our 30 mm cage cube rotation platforms.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
B3C Support Documentation
B3CFixed Cage Cube Platform for C4W/C6W
$24.40
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
B3C/M Support Documentation
B3C/MFixed Cage Cube Platform for C4W/C6W, Metric
$24.40
Today

Kinematic Cage Cube Platform

B4C Bottom View
Click to Enlarge

The proper installation of a B4C viewed from the bottom of a C4W Cage Cube.
  • Mounts at Almost Any Angle within C4W and C6W Cubes
  • B4C: Eight 4-40 Tapped Holes
  • B4C/M: Four M4 and Five M3 Tapped Holes
  • Offers Pitch, Roll, and Z Translation

The B4C Kinematic Cage Cube Platform mounts into the top or bottom of our C4W or C6W cage cube (see image to the right). This platform can be coarsely rotated while inside the cage cube prior to being locked down at almost any angle with the included 4-40 button-head screws and 1/16" hex key. The tapped holes on this platform are ideal for mounting the 30 mm cage optic mounts. The metric M4 tapped holes may be used with our PM3/M clamping arm to hold items such as prisms.

The B4C(/M) platform has three adjusters [5/64" (2 mm) hex] to provide pitch, roll, and Z translation in addition to rotational positioning. The kinematic adjustment comes from three 1/4"-80 adjuster screws that give ±4° pitch/roll articulation and up to 0.125" of Z translation. The bottom of each platform has an 8-32 (M4)-tapped hole, thereby allowing it to be mounted onto a Ø1/2 Post.

Thorlabs also offers a 30 mm cage cube rotation platforms for more precise control of a platform mounted optic.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
B4C Support Documentation
B4CKinematic Cage Cube Platform for C4W/C6W
$96.50
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
B4C/M Support Documentation
B4C/MKinematic Cage Cube Platform for C4W/C6W, Metric
$96.50
Today

Cage Cube Platform Adapter for the C6W

C6WA Mounted in a C6W Cage Cube with the B3CR
Click for Details

The C6WA is shown here with the B3CR. It can be mounted to the C6W Cage Cube with Thorlabs' Cube Platforms.*
B5C mounted in the C6W using a C6WA and B3CR
Click for Details
View Imperial Product List
Item #QtyDescription
Imperial Product List
C6WA1C6W Platform Adapter Kit
B5C11Ø1" Optic Mount for 30 mm Cage Cube with Setscrew Optic Retention
B3CR130 mm Cage Cube Rotation Platform
C6W130 mm Cage Cube, Ø6 mm Through Holes
ER104Cage Assembly Rod, 10" Long, Ø6 mm
View Metric Product List
Item #QtyDescription
Metric Product List
C6WA/M1C6W Platform Adapter Kit, Metric
B5C11Ø1" Optic Mount for 30 mm Cage Cube with Setscrew Optic Retention
B3CR/M130 mm Cage Cube Rotation Platform (Metric)
C6W130 mm Cage Cube, Ø6 mm Through Holes
ER104Cage Assembly Rod, 10" Long, Ø6 mm
The C6WA can be used to mount optics with the B5C1 in the C6W Cage Cube while allowing all four cage rods to be fully inserted in the through holes.
  • Mounting Adapter Allows C6W to House Optics with All Four Cage Rods Inserted
  • Compatible with B3C(/M), B4C(/M), B3CR(/M), and B4CRP(/M) Platforms*
  • Four 4-40 (M3) Button-Head Screws Included for Mounting

The C6WA(/M) Platform Adapter Kit allows Thorlabs' Cube Platforms* to be used in conjunction with the C6W with all four cage rods installed. The C6WA(/M) kit consists of two machined components, four 4-40 button-head screws, and a single 4-40 (M3) flat-head screw. A 0.08" (2.0 mm) thick shim allows the mounting platform to mate to the C6W without interfering with the cage rods while a secondary platform is then installed above the cage rods. The adapter platform has a diameter of 1.65" (41.9 mm) and raises the mounting surface height by 0.27" (6.9 mm).

The C6WA(/M)'s hole pattern consists of four 4-40 (M4) taps compatible with our Optic Holders and four 6-32 (M4) tapped holes allowing the use of a PM3(/M) Clamping Arm. When using one of these optic holders or a clamping arm with a rotating cage cube platform and the C6WA(/M), limited fine adjustment with the rotation platform is possible before the top of the mount or clamping arm interferes with the cage rods. This platform adapter is not designed for use with the FFM1.

To use the adapter, place the square shim between the bottom of the C6W and the cage cube platform [B3C(/M), B4C(/M)*, B3CR(/M)*, or B4CRP(/M)] that you wish to mount to the cage cube. Secure the cage cube platform to the cage cube through the holes in the shim using the four included 4-40 button-head screws (1/16" hex), as shown in the exploded view to the right. Insert the adapter platform through the top hole of the cage cube, angling it as needed to bypass the top cage rods, and attach it to the cage cube platform using the included 4-40 (M3) flat-head screw [1/16" (2 mm) hex]. Once the adapter platform is installed, the optic holder or clamping arm can be used to mount an optic inside the cage cube.

Please note that the vertical offset created by the raised mounting platform will make any optic mounted using our 30 mm-Cage-Cube-Compatible Optic Mounts no longer centered with respect to the SM1-threaded ports.

*The C6WA(/M) is not compatible with versions of the B3CR/M sold before March 26, 2014, or B3C(/M) and B4C(/M) platforms sold before December 5, 2012. If you have an older model of the B3CR/M, B3C(/M), or B4C(/M) platforms and would like to exhange it for the new version, please contact Technical Support.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available / Ships
C6WA Support Documentation
C6WACustomer Inspired!C6W Platform Adapter Kit
$42.25
Today
+1 Qty Docs Part Number - Metric Price Available / Ships
C6WA/M Support Documentation
C6WA/MCustomer Inspired!C6W Platform Adapter Kit, Metric
$42.25
Today
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