You are viewing an old version of this page. View the current version.

Compare with Current View Page History

Version 1 Next »



Prime Focus Corrector System

The following image shows an extract from the WEAVE instrument block diagram which depicts the sub-assemblies (blue) that constitute the Two-degree Prime Focus system (yellow).  These sub-assemblies will be delivered as part of this system however the control aspects of the moving mechanisms are described in Observatory Control System.


The Two-degree Prime Focus system (PRI) is composed of:

  • Two corrector lenses
  • Four lenses which constitute the Atmospheric Dispersion Corrector (ADC)
  • The corrector housing
  • A "Central Can"
  • The rotator
  • The cable wrap subsystem
  • Eight telescope vanes
  • The Focus Translation System (FTS)

The following pictures represents the system.  The Fibre Positioner which is for completeness does not form part of this system.

WEAVE Prime Focus Assembly (WPFA)




The optical system for the WEAVE Prime Focus Corrector is composed of six lenses made of different materials with specific characteristics.  The optical layout for the PFC design is shown below:


A model of the proposed PFC is shown beneath. The six lenses are held within this structure which has a physical interface with the Central Can.



The Central Can (already manufactured) is attached to the vanes which are attached to the Focal Translation System.  In this photo the dummy PFC is inserted into the Central Can.





  • No labels