SIAMOIS:%20optical%20test%20bench%20BOSS%20(Banc%20Optique%20SiamoiS)

1
SIAMOIS optical test benchBOSS (Banc Optique
SiamoiS)

• Pernelle Bernardi
• Observatoire de Paris-Meudon, LESIA

2
The test bench objectives

• Simulation of all the components, except the
  interferometer
• Far field of the optical fiber
• Qualification of the optical fiber connectors
• Definition of the mechanical interface of the 2
  fibers
• Imaging spectra on the camera
• Testing acquisition softwares and data processing

3
Design of the test bench
4
Far field of the fiber

• The far field of the optical fiber defines the
  size of the 5 zones of the steps mirror.

Acquisition of the beam profile with a CCD.
5
Qualification of the optical fiber

• Two qualifications at -80C
• Optical fiber only ? optical tests during cooling
• Optical fiber connectors ? optical tests
  before/after cooling
• Purchase of several fibers
• Two manufacturers
• Two different jackets PVC and metal

6
Mechanical interface of the fibers

• Specification distance of 128 µm between the two
  fiber cores (signal calibration) at the
  collimator focus
• Design of the mechanical interface of the 2
  fibers
• Test of the robustness of this component
• Evaluation of the constraints on the fibers

7
Implementation of the camera

• Model iDus DU440
• Active pixels 1024 x 255
• Pixel size 26 x 26µm
• Back illuminated, AR coated for optimal
  performance in the 350nm region
• Full well capacity 465 ke- (typical)
• Read noise 4 _at_ 33kHz
• Typical minimum temperature -70C (air cooled)
• Andor software (LabView)
• Acquisition
• Real-time data display
• Shutter control
• Data processing
• 2 spectra
• Calibration source

8
Conclusion

• State of the test bench today (in Meudon labs,
  ex CoRoT CCD test bench)
• Waiting for equipmentafter many difficulties to
  order it!
• Beginning of the tests scheduled for june 2006
• 2 students