Main mirror maintenance of the 90 cm telescope

Disassembly, coating, and assembly were done by -4H- Jena engineering GmbHExternal link.

  • Our 90 cm Schmidt telescope inside its dome
    Our 90 cm Schmidt telescope inside its dome
    Image: F. Gießler
  • Removing the protection cap
    Removing the protection cap
    Image: F. Gießler
  • Mirror mount – with axial and radial support elements
    Mirror mount – with axial and radial support elements
    Image: F. Gießler
  • Lassell levers – axial support in more detail
    Lassell levers – axial support in more detail
    Image: F. Gießler
  • Inside the telescope – time, dirt, and moisture have taken their toll
    Inside the telescope – time, dirt, and moisture have taken their toll
    Image: F. Gießler
  • Removing the mirror mount
    Removing the mirror mount
    Image: F. Gießler
  • Main mirror – mirror and mount together are 760 kg
    Main mirror – mirror and mount together are 760 kg
    Image: F. Gießler
  • Radial support elements
    Radial support elements
    Image: F. Gießler
  • Removing the radial support elements from the mirror mount
    Removing the radial support elements from the mirror mount
    Image: F. Gießler
  • The mirror – made from glass, diameter: 1 m, thickness: 17 cm, mass: 315 kg
    The mirror – made from glass, diameter: 1 m, thickness: 17 cm, mass: 315 kg
    Image: F. Gießler
  • Wooden transport box
    Wooden transport box
    Image: F. Gießler
  • Two weeks later – as good as new
    Two weeks later – as good as new
    Image: F. Gießler
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