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30 mm Cage Cube for Beamsplitter Cubes


  • Removable Insert for Easy Exchange of Optics in Aligned Experiment
  • Mounts 1" Beamsplitter Cubes and Ø1" Round Optics
  • 30 mm Cage System and Ø1" Lens Tube Compatible

DFM1BS

30 mm Cage Cube for Beamsplitter Cubes,
SM1-Threaded Ports

DFM1T5

Separate Insert Available for
Easy Exchange of Optics

DFM1B/M

Separate Cube Base Available

Application Idea

DFM1BS Cube with installed beamsplitter cube can direct a beam within a cage system. 

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Mount Ø1" optics and a beamsplitter cube in the insert.

Features

Thorlabs' DFM1BS(/M) Beamsplitter Cube is designed to hold Ø1" optics, such as excitation and emission filters, and a 1" beamsplitter cube in the center. This cube consists of a kinematic base with four SM1-threaded (1.035"-40) ports surrounded by four 4-40 tapped holes for compatibility with 30 mm cage systems. The ports are at an optical axis height of 1.25" and 30 mm for the imperial and metric versions, respectively. Magnets in the base and insert of the cube ensure repeatable positioning of the cube within a cage system. The top is engraved with a diagram of the beamsplitter location and indicates the light path through the cube. To help keep track of your optics, spaces are provided on the top to write labels for the mounted filters. 

Kinematic Cage Cubes Selection Guide
Type 30 mm Cage Cubes 60 mm Cage Cubes
Empty Fluorescence Filter Cubes DFM1 DFM2
Empty Beamsplitter Cube DFM1BS -
Empty Right-Angle Mirror Cubes DFM1RM DFM2RM
Beam Turning Cubes with Pre-Mounted Prism Mirrors DFM1-xxx -

Additional cube inserts (sold separately below) can be used to exchange optics and to easily exchange alternate sets of optics within an aligned setup. This enables switching between fluorescence imaging of different wavelengths or changing the direction of the reflected light. The cube base is also separately available for purchase. The same base is used in Thorlabs' Fluorescence Filter Cube and Beam-Turning Cube Systems, enabling a user to exchange right-angle mirrors/prisms, fluorescence filter sets, and beamsplitter cubes within an aligned optical setup. Two adjacent kinematic cubes can be connnected using a Cage Cube Connector (sold separately below); the connector can be attached via the 4-40 tapped holes and unthreaded alignment holes surrounding each port.

ESK22 SmartPack Packaging
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Kinematic Beamsplitter Cage Cube Packaging

Smart Pack Goals

  • Reduce Weight of Packaging
  • Increase Usage of Recyclable Materials
  • Improve Packing Integrity
  • Decrease Shipping Costs

Thorlabs' Smart Pack Initiative is aimed at minimizing waste while providing adequate protection for our products. By eliminating any unnecessary packaging, implementing design changes, and utilizing eco-friendly materials, this initiative seeks to reduce the environmental impact of our product packaging.

The kinematic beamsplitter cube packaging is made from over 60% recycled paper products. We are transitioning from foam and non-recycled cardboard to recycled paper products to reduce the amount of CO2 produced per kg of packing materials. All products on this page have transitioned, or are in the process of transitioning to recycled paper.

As we move through our product line, we will indicate re-engineered, eco-friendly packaging with our Smart Pack logo, which can be seen in the image to the right.


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30 mm Cage-Compatible, Kinematic Beamsplitter Cube

Cage-Compatible Filter Cube
Click to Enlarge

The DFM1BS has two excitation (EX) and two emission (EM) filter ports. Ports labeled with the same number should be used together.
Cage-Compatible Filter Cube
Click to Enlarge

Users can change the orientation of the beamsplitter by removing the cover with the included 2 mm hex key and rotating the beamsplitter by hand.
DFM1BS(/M) Compatible Optics
Type Dimensions Thickness
Excitation Filter Ø25 mm 5.0 mm
Emission Filter Ø25 mm 3.5 mm
Beamsplitter Cube 25.4 mm x 25.4 mm x 25.4 mm
(1" x 1" x 1")
  • Kinematic 30 mm Cage-Compatible Cube for Mounting Beamsplitter Cubes
  • Four 4-40 Tapped Holes Around Each SM1-Threaded (1.035"-40) Port Enable
    30 mm Cage System Compatibility
  • Three Bottom-Located 1/4"-20 (M6) Tapped Holes for Post Mounting

This Kinematic Beamsplitter Cube consists of a post-mountable cube base and a removable insert that mounts Ø1" optics and a 1" beamsplitter cube (sold separately). See the table to the lower right for acceptable optic sizes. 

The cube insert has four ports for excitation and emission filters. Excitation and emission filters can be mounted in two possible configurations (see the diagram to the right) and are held using the included SM1RR retaining rings, which can be tightened or loosened with our SPW602 spanner wrench (sold separately). The mounting cover that holds the beamsplitter within the cage cube can be removed using the included 2 mm hex key. Users can change the orientation of the beamsplitter by removing the cover and rotating the beamsplitter manually. The top of the cube is engraved with a diagram of the beamsplitter location and indicates the light path through the cube. To help keep track of your optics, spaces are provided on the top to write labels for the mounted filters.

All four sides of the filter cube base have an SM1-threaded port for compatibility with our Ø1" lens tubes. The SM1 port is centered between four 4-40 tapped holes for compatibility with Ø6 mm cage rods in a 30 mm cage system, at an optical axis height of 1.25" or 30.0 mm from the bottom of the imperial or metric cube, respectively. The cube base has three bottom-located 1/4"-20 (M6) tapped holes that are directly compatible with top taps of our Ø1" and Ø1.5" posts, and the bottom tap of our Ø1/2" posts, using a user-supplied 1/4"-20 (M6) setscrew. Alternatively, an AE8E25E (AE4M6M) thread adapter can be used for compatibility with the top tap of our Ø1/2" posts.

An empty kinematic beamsplitter cube insert, base, and cover plate are also sold separately below.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
DFM1BS Support Documentation
DFM1BSKinematic Beamsplitter Cage Cube, 1/4"-20 Tapped Holes
$386.17
Today
+1 Qty Docs Part Number - Metric Price Available
DFM1BS/M Support Documentation
DFM1BS/MKinematic Beamsplitter Cage Cube, M6 Tapped Holes
$386.17
Today

30 mm Cage-Compatible, Kinematic Beamsplitter Cube Insert and Base

Cage-Compatible Filter Cube
Click to Enlarge

DFM1T5 Kinematic Cage Cube Insert Holding the PBS251 Polarizing Beamsplitter
DFM1T5 Compatible Optics
Type Dimensions Thickness
Excitation Ø25 mm 5.0 mm
Emission Ø25 mm 3.5 mm
Beamsplitter Cube 25.4 mm x 25.4 mm x 25.4 mm
(1" x 1" x 1")
  • Empty Kinematic Insert and Base for Exchanging User-Provided Filters or Beamsplitter Cubes
  • Ideal for Quickly Switching Filters and Beamsplitter Cubes in an Aligned Experimental Setup
  • Cube Base with Four 4-40 Tapped Holes Around Each SM1-Threaded (1.035"-40) Port
    • Three Bottom-Located 1/4"-20 (M6) Tapped Holes for Post Mounting
  • Cover Plate for Uninterrupted Beam Transmission Available

The Kinematic Beamsplitter Cube Insert (DFM1T5) and Base [DFM1B(/M)] allow users to switch between different filters and beamsplitter cubes in an aligned experimental setup. These items do not include any optics.

The DFM1T5 cube insert is designed to hold Ø1" optics and a 1" beamsplitter cube. See the table to the lower right for acceptable optic sizes. The mounting cover that holds the beamsplitter within the cage cube can be removed using the included 2 mm hex key. Users can change the orientation of the beamsplitter by removing the cover and rotating the beamsplitter manually. This insert is compatible with the beamsplitter cubes sold above as well as Thorlabs' Fluorescence Filter Cube and Beam-Turning Cube Systems. 

All four sides of the DFM1B(/M) cube base have an SM1-threaded port for compatibility with our Ø1" lens tubes. The SM1 port is centered between four 4-40 tapped holes for compatibility with Ø6 mm cage rods in a 30 mm cage system, at an optical axis height of 1.25" or 30.0 mm from the bottom of the imperial or metric cube, respectively. The cube base has three bottom-located 1/4"-20 (M6) tapped holes that are directly compatible with top taps of our Ø1" and Ø1.5" posts, and the bottom tap of our Ø1/2" posts, using a user-supplied 1/4"-20 (M6) setscrew. Alternatively, an AE8E25E (AE4M6M) thread adapter can be used for compatibility with the top tap of our Ø1/2" posts.

The DFM1C Cage Cube Cover Plate is also available for when a filter is not installed within the cube. When used with the SM1CP2 End Cap, this cover minimizes the amount of stray light entering through the top or unused ports.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
DFM1B Support Documentation
DFM1BKinematic 30 mm Cage Cube Base, 1/4"-20 Tapped Holes
$159.14
Today
+1 Qty Docs Part Number - Universal Price Available
DFM1C Support Documentation
DFM1CCustomer Inspired! Cover Plate for Kinematic 30 mm Cage Cube Base
$47.74
Today
DFM1T5 Support Documentation
DFM1T5Kinematic 30 mm Cage Cube Insert for Beamsplitter Cubes
$270.53
Today
+1 Qty Docs Part Number - Metric Price Available
DFM1B/M Support Documentation
DFM1B/MKinematic 30 mm Cage Cube Base, M6 Tapped Holes
$159.14
Lead Time

30 mm Cage Cube Connector

Cage Cube Connector
Click to Enlarge
Two DFM1-P01 Beam Turning Cubes Connected Using the C4W-CC Cage Cube Connector
  • Connect Two Beam Turning, Fluorescence Filter, or Beamspliter Cubes Side by Side
  • Remove and Interchange Cube Inserts while the Cube Bases are Connected
  • Compatible with C4W and C6W Cage Cubes

The C4W-CC Cage Cube Connector allows two kinematic beam turning, fluorescence filter, or beamsplitter cubes to be connected together as shown in the image to the right. Two pins on the C4W-CC are accepted by drilled holes on either side of any of the SM1-threaded (1.035"-40) ports on the cage cube faces to maintain alignment. Cube inserts can still be removed and inserted while the cube bases are connected.

The C4W-CC is also compatible with our 30 mm cage cubes.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
C4W-CC Support Documentation
C4W-CCCustomer Inspired! 30 mm Cage Cube Connector for C4W and C6W Series Cubes
$54.65
Today
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