Life in the Atacama, Design Review, December 19, 2003 Carnegie Mellon Fluorescence Imager Life in the Atacama Design Review December 19, 2003 David Pane.

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Presentation transcript:

Life in the Atacama, Design Review, December 19, 2003 Carnegie Mellon Fluorescence Imager Life in the Atacama Design Review December 19, 2003 David Pane Trey Smith Alan Waggoner Shmuel Weinstein And others Carnegie Mellon University

Life in the Atacama, Design Review, December 19, 2003 Carnegie Mellon Key Requirements Purpose: To be the Direct Indicator of Life Detect weak fluorescent signal against background View 10 cm x 10 cm area of target Be sensitive to both reagent dye markers and chlorophyll

Life in the Atacama, Design Review, December 19, 2003 Carnegie Mellon Fluorescence Imager Placement Chose under the belly for added protection and shading

Life in the Atacama, Design Review, December 19, 2003 Carnegie Mellon Fluorescence Imager Ops

Life in the Atacama, Design Review, December 19, 2003 Carnegie Mellon Design Considerations Can we perform fluorescence imaging in the day, or are we limited to night? Daytime Imaging Pulsed light source with gated intensifier Shroud/no shroud Sufficiently bright light source Possibly use non-cooled CCD

Life in the Atacama, Design Review, December 19, 2003 Carnegie Mellon Recommended System- Side View Lens Filter Wheel Intensifier Camera 5.2cm 40.0 cm 18.1 cm cm Object distance 13 cm from front of the lens Optics

Life in the Atacama, Design Review, December 19, 2003 Carnegie Mellon Recommended System-Front View 18.1 cm 40.0 cm 5.2cm cm 9.05 cm lens LED or Fiber optic from flash 11 cm Protective shield 5.5 cm 8 cm 7 cm 9.5 cm 7 cm 4.5 cm Double Shroud 14 cm hanging down Same on other side

Life in the Atacama, Design Review, December 19, 2003 Carnegie Mellon Recommended System-Outside of Unit cm 1.752cm cm cm 15.24cm cm Intensifier Control Unit Filter Wheel Control kg? kg 12 VDC 1 motor ~20Watts 110 or 220VAC 10 Watts

Life in the Atacama, Design Review, December 19, 2003 Carnegie Mellon System Specs Vertical Length = 56 cm Z movement from stowed position to ground X movement across underside of rover Instrument clearance 32 cm in Y Both cameras Linux compatible Need contact sensor on the end of unit to avoid using laser rangefinder Through-focus image set to determine best focus Need to determine best method of supplying TTL pulses for intensifier and light sources Optional fiber optic bundle to deliver light from source to distal end of unit Filter wheel filters for imager consist of R, G, B, cholorphyll, and 4 dye filters Filter wheel filters for lamp consist of chlorophyll, 4 dye filters, and an open position

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