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Designing an Intensified Photodiode Mount
MAIA Sensor System: Designing an Intensified Photodiode Mount Keizo Gates Akamai Internship
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Overview MAIA Laser System MAIA Sensor MAIA Receiver
The Need for a Mount The Design Process The Final Result
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The Big Picture Existing MAIA Laser in the Beam Director/Tracker (BD/T) telescope 2500 Hz max rep rate 11 ns pulse length 54 MW peak power AEOS 3.67 m telescope Largest in the Dept of Defense Using Coudé room 5 The MAIA Sensor System Talk about the two telescopes Where the maia sensor is located Brief on applications.. Ranging, radiometry
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The MAIA Sensor System Used in the AEOS Consists of Collection optics
Intevac Intensified Photodiode sensor Supporting electronics Real time data collection and processing RT Linux PC Signal processing Software three major components in the sensor system
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The MAIA Receiver Box Bread-board Optics A refrigeration unit
Intensified Photodiode sensor inside Overall system enclosure Existing CAD by Charlie Crandall Explain everything on the board. Explain my task.
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Identify the Problem Need to Secure the IPD Sensor
Mount 15mm lens & allow for 10mm focus adjustment Contain the BiasT & Amp Products for Research Thermal Cooler
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Design Process Brainstorm possible solutions Select the best idea
Sketch, research opto-mechanics Gather input Select the best idea Detail design Communicate the result Prototype the product
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Design Details Constraints, Issues & Concerns Length limitations
Fixing the sensor without stress Containing BiasT, Amplifier, & Wires Securing the lens assembly Temperature
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Design Analysis Amp heat concerns Thermal expansion concerns
P=k*A/L*∆T P=1 Watt, solve eq; ∆T << 1 Thermal expansion concerns ∆x = CTE*∆T*d Solve for ∆x; ∆x = .013 mm << tolerances Neither are major issues Small part Small temperature change 1 W Power
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Final Design Part List Review each part
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Final Design Cross Section
Assembly that fits into Products for Research cooling unit. Point out sensor, bias T, Amplifier, amp mount Point out custom part Say how the sensor is secured Point out lens assembly, O ring, Explain lens movement
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Final Design CAD Point out the custom aluminum part
Point out the amp mount
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Conclusions Design consists of one custom part Next Steps
Interfaced with Thorlabs components Two modified Thorlabs components Next Steps Machine the parts Assemble the parts Install into the MAIA Sensor box
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Acknowledgements Textron Systems Hawai’i Products for Research
Paul Konkola, Charlie Crandall, Michael Reiley Products for Research Center for Adaptive Optics Malika Bell, Lisa Hunter, Hillary O’Bryan Maui Economic and Development Board Isla Yap References AMOS: Textron Systems:
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Questions?
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