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Kinematic Mirror Holder Cube

This is the repository for the Kinematic Mirror Holder Cube.

To acquire the STL-files use the UC2-Configurator. The files themselves are in the RAW folder. The module can be built using injection-moulded (IM) or 3D-printed (3DP) cubes.

Purpose

It adapts a mirror to the UC2 system. It allows precise tilting in x and y.

Properties

  • design is derived from the base-cube
  • the adapter holds a 30×30 mm ² toy-mirror or a 1 inch circular mirror (e.g. Thorlabs part) at 45 degrees in a UC2 base cube
  • the here used mirror has the following parameters:
    • Diameter: 25,4mm
    • Reflectance
    • Surface Flatness: (Peak to Valley) λ/10 @ 633 nm
    • Substrate Fused: Silica
    • Thickness: 6.0 mm (0.24")

Parts

The Bill of Materials is always the most up-to-date version!

3D printing parts

  • No support needed in all designs
  • Carefully remove all support structures (if applicable)

The Cube consists of the following components.

Default:

  • IM Cube which houses the insert and adapts it into a UC2 setup.
  • The Kinematic Mirror Holder Base which holds the three screws that change the tilt of the mirror ([20_Cube_Insert_Kinematic_Mirrormount_base_v3.stl])
  • The Mirror (30×30 mm) Holder for the Kinematic Mirror Holder which holds the Mirror on the front side and three magnets on the back. For 30×30mm² Toy mirror (20_Cube_Insert_Kinematic_Mirrormount_Plate.stl)

Alternatives:

Additional parts

  • Check out the RESOURCES for more information!
  • 3× DIN912 M3×12 screws (galvanized steel) 🢂
  • 3× Ballmagnets, arbitrary diameter 🢂
  • 1× Mirror (e.g. Amazon 30×30mm² with double-sided sticky tape) 🢂
  • or 1× Thorlabs PF10-03-P01 - Protected Silver Mirror 🢂
  • For better precision, we use a custom cut metal plate (30×40 mm, galvanized steel) instead of the 3D-printed plate to hold the mirror.

Assembly

  • Insert three M3 screw into the holes in the mirror holder. There are four holes - the one in the center of the part stays empty! Make sure you are using the correct holes
  • Slide the mirror holder into the Cube
  • Close the cube accordingly (IM/3DP)
  • Insert the ballmagnets into the mirror holder.
  • Glue/Insert your mirror to the holder. For the sticky mirror: place the mirror roughly in the center of the plate
  • Attach the mirror holder to the ends of the screws of the kinematic mirror base using the magnets of the mirror holder and the screws of the base
  • Done!

Tutorial with images

❕ This tutorial shows a UC2_v2 cube but the assembly of the insert is still the same. For assembly of the cube (IM/3DP) check the ASSEMBLY_CUBE_Base.

Note:
The previous version of this module used a metal plate instead of the 3D printed plate. However, the metal plates are not generally available (We had them custom cut in a mechanical workshop). Other than that, the assembly is still the same - have a look in step 8.
The metal plates limit the play between the magnets and screws, so it might be a more stable solution.

  1. All parts for this model

  1. Add M3 screws and Ballmagnets to the insert

  1. Glue the Mirror to the Metal plate

  1. Add the magnetic mirror plate to the 3 Ballmagents

  1. Put the insert inside the cube, add Screws - Done!

  1. Here you see the 3D printed plate. Simply press the ballmagnets into the holes of the plate using pliers.

  1. In the end it should look like this:

Safety

Don't touch the mirror surface!