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30 mm Cage Cube Rotating Platforms


  • Stable Platform to Mount Optics Within 30 mm Cage Cubes
  • Provides Continuous Rotation While Mounted
  • Compatible with 30 mm Cage Cubes and Optic Holders

B4CRP

Bottom

B3CR

Top

B3CR with C6WA Adapter Allowing
all Four Cage Rods to Pass
Through C6W Cage Cube

Application Idea

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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
  • Continuous Rotation While Mounted to a Cage Cube
  • Kinematic Options Available

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 and are locked down with the included screws (see video to the bottom left). Both platforms can be continuously rotated, even after locking down to a cage cube; giving the user dynamic control over the position of the optic within a cage cube. The B4C platform offers additional precision rotation with a side located micrometer and kinematic translation via three set screws 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 B3CR(/M) and B4CRP(/M) cube 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.

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.

Posted Comments:
lebow  (posted 2018-04-19 12:13:35.457)
Why don't you make an adapter that will allow the mounting of cage hardware on a 1/2" post. I had our machine shop make a simple 1/4" plate with a 1.75" hole with (3) 4-40 tapped holes to retain the mount. Tapped 8-32 hole in side. Right now you line of cage hardware is extremely restricted.
llamb  (posted 2018-04-27 08:31:46.0)
Thank you for your feedback. We are always looking to improve our product line. I will reach out to you directly to discuss your customization and add this new idea to our internal product forum.

Rotating Cage Cube Platform

B3CR and PM3 Holding a Prism
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View Imperial Product List
Item #QtyDescription
Imperial Product List
B3CR130 mm Cage Cube Rotation Platform
PM31Small Adjustable Clamping Arm, 6-32 Threaded Post
C6W130 mm Cage Cube, Ø6 mm Through Holes
ER6-P41Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
View Metric Product List
Item #QtyDescription
Metric Product List
B3CR/M130 mm Cage Cube Rotation Platform (Metric)
PM3/M1Small Adjustable Clamping Arm, M4 Threaded Post
C6W130 mm Cage Cube, Ø6 mm Through Holes
ER6-P41Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
The B3CR has 6-32 Taps for use with the PM3 to Hold a Right-Angle Prism

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View Imperial Product List
Item #QtyDescription
Imperial Product
B3CR130 mm Cage Cube Rotation Platform
B5C11Ø1" Optic Mount for 30 mm Cage Cube with Setscrew Optic Retention
C6W130 mm Cage Cube, Ø6 mm Through Holes
ER6-P41Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
View Metric Product List
Item #QtyDescription
Metric Product List
B3CR/M130 mm Cage Cube Rotation Platform (Metric)
B5C11Ø1" Optic Mount for 30 mm Cage Cube with Setscrew Optic Retention
C6W130 mm Cage Cube, Ø6 mm Through Holes
ER6-P41Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
The B3CR is Compatible with the B5C1 Optic Mount
  • Continuously Rotating Cage Cube Mounting Platform
  • Brass 1/16" Locking Setscrew to Secure Position
  • Compatible with 30 mm Cage Cube Accessories
  • Platform Includes Alignment Marks for 5 mm, 10 mm, 20 mm, and 25.4 mm Cube Optics

The B3CR platform mounts on the top or bottom of a C4W or C6W cage cube. It provides a freely rotating platform that can be used to mount a variety of optics inside the cube. The platform can rotate through the full 360°, and can be locked using the brass setscrew with 1/16" hex.

The 4-40 (M3) tapped holes can mount our Optic Holders (B5C1 shown at right) or the FFM1 Dichroic Holder, while the 6-32 (M4) holes are compatible with the PM3 (PM3/M) Clamping Arm to hold prisms (shown at far right). Larger cube-shaped optics and prisms can also be secured with the B6C, which has a swivel head to allow for optic rotation. A Ø25 mm Post Spacer can be placed under the optic to center it in the clear aperture of the cube when using the PM3 or B5C.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
B3CR Support Documentation
B3CRCustomer Inspired! 30 mm Cage Cube Rotation Platform
$108.21
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B3CR/M Support Documentation
B3CR/MCustomer Inspired! 30 mm Cage Cube Rotation Platform (Metric)
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Precision Kinematic Rotating Cage Cube Platform


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View Imperial Product List
Item #QtyDescription
Imperial Product List
B4CRP130 mm Cage Cube Precision Kinematic Rotation Platform
B5CT21Ø1" Optic Mount with SM1-Threaded Bore for 30 mm Cage Cube, Mounts Optics up to 6.3 mm Thick
C6W130 mm Cage Cube, Ø6 mm Through Holes
ER6-P41Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
View Metric Product List
Item #QtyDescription
Metric Product List
B4CRP/M130 mm Cage Cube Precision Kinematic Rotation Platform (Metric)
B5CT21Ø1" Optic Mount with SM1-Threaded Bore for 30 mm Cage Cube, Mounts Optics up to 6.3 mm Thick
C6W130 mm Cage Cube, Ø6 mm Through Holes
ER6-P41Cage Assembly Rod, 6" Long, Ø6 mm, 4 Pack
The B4CRP is Compatible with the B5CT2 Optic Mount
  • Kinematic Platform Enables Tip, Tilt, and Height adjustment
  • 360° Manual Rotation with ±7° Micrometer-Driven Fine Adjustment
  • 1/16" Hex Locking Hex Setscrew to Secure Manual and Micrometer Position
  • 1° Resolution Laser Engraved Scale With 5 Arcmin Vernier Scale
  • Compatible with all Cage Cube Accessories

The B4CRP (/M) precision platform mounts to the top or bottom of a C4W or C6W 30 mm cage cube. This precision platform can be freely rotated 360° while mounted to a 30 mm cage cube. Additionally, when engaged, the stage provides a micrometer driven ±7° of fine rotation. A laser engraved scale provides 1° resolution with a 5 arcmin vernier scale. Three kinematic adjustment screws located on the bottom of the platform (see image at top right) allow for fine tip, tilt, and height adjustments; resulting in total and precise control of and optic’s position while mounted in a 30 mm cage cube. The top plate is marked with 3 small Xs, indicating the location of the three kinematic adjustment screws. A 1/16” hex setscrew allows the user to lock the position of the platform while another 1/16” hex setscrew enables or disables micrometer control (see image at far top right). Please note that overtightening of the fine adjustment control screw may prevent proper operation of the micrometer.

The 4-40 (M3) tapped holes can mount our Optic Holders (B5CT2 shown at right) or the FFM1 Dichroic Holder, while the 6-32 (M4) holes are compatible with the PM3 (PM3/M) Clamping Arm to hold other components such as prisms. Larger cube-shaped optics and prisms can also be secured with the B6C, which has a swivel head to allow for optic rotation. A Ø25 mm Post Spacer can be placed under the optic to center it in the clear aperture of the cube when using the PM3 or B6C.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
B4CRP Support Documentation
B4CRPCustomer Inspired! 30 mm Cage Cube Precision Kinematic Rotation Platform
$312.73
Today
+1 Qty Docs Part Number - Metric Price Available
B4CRP/M Support Documentation
B4CRP/MCustomer Inspired! 30 mm Cage Cube Precision Kinematic Rotation Platform (Metric)
$312.73
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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
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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 1/4" Long 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 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 (M3) taps compatible with our Optic Holders (B5C1 shown at right) and four 6-32 (M3) tapped holes allowing the use of a PM3 Clamping Arm. When using one of these optic holders or a clamping arm with a rotating cage cube platform and the C6WA, 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)) 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 1/4" (6.4 mm) long button-head screws included in the adapter kit (see 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. 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 exchange 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
C6WA Support Documentation
C6WACustomer Inspired! C6W Platform Adapter Kit
$45.72
Today
+1 Qty Docs Part Number - Metric Price Available
C6WA/M Support Documentation
C6WA/MCustomer Inspired! C6W Platform Adapter Kit, Metric
$45.72
Today
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