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SIAMOIS: optical test bench BOSS (Banc Optique SiamoiS)

SIAMOIS: optical test bench BOSS (Banc Optique SiamoiS). Pernelle Bernardi Observatoire de Paris-Meudon, LESIA. The test bench objectives. Simulation of all the components, except the interferometer: Far field of the optical fiber Qualification of the optical fiber + connectors

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SIAMOIS: optical test bench BOSS (Banc Optique SiamoiS)

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  1. SIAMOIS: optical test benchBOSS (Banc Optique SiamoiS) Pernelle Bernardi Observatoire de Paris-Meudon, LESIA SIAMOIS, kickoff meeting, Paris, 15-16 may, 2006

  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 SIAMOIS, kickoff meeting, Paris, 15-16 may, 2006

  3. calibration channel Segmentary mirror 2 plane mirrors narrow bandpass filter optical fibers beamsplitter bandpass filter 400-560nm QTH source collimator Andor camera signal channel Diffraction grating focusing objective Design of the test bench SIAMOIS, kickoff meeting, Paris, 15-16 may, 2006

  4. F/4 F/5 27.6mm Size of the CoRoT CCD 37mm Size of the beam QTH source optical fiber band-pass filter (400-560nm) CCD on translation stages 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. SIAMOIS, kickoff meeting, Paris, 15-16 may, 2006

  5. QTH source optical fiber Measurement of the far field uniformity band-pass filter (400-560nm) CCD on translation stages dewar QTH source optical fiber power meter Measurement of the variations of the fiber transmission band-pass filter (400-560nm) dewar Qualification of the optical fiber • Two qualifications at -80°C • 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 SIAMOIS, kickoff meeting, Paris, 15-16 may, 2006

  6. signal fiber calibration fiber 50µm 128 ± 20µm 65µm 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 SIAMOIS, kickoff meeting, Paris, 15-16 may, 2006

  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 @ 33kHz • Typical minimum temperature: -70°C (air cooled) • Andor software (LabView) • Acquisition • Real-time data display • Shutter control • Data processing • 2 spectra • Calibration source SIAMOIS, kickoff meeting, Paris, 15-16 may, 2006

  8. Conclusion • State of the test bench today: (in Meudon labs, ex CoRoT CCD test bench) • Waiting for equipment…after many difficulties to order it! • Beginning of the tests scheduled for june 2006 • 2 students SIAMOIS, kickoff meeting, Paris, 15-16 may, 2006

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