Career Summary revC.pptx
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Transcript of Career Summary revC.pptx
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Schmidt Cassegrain Telescope Manufacturing EngineerCelestron, Torrance, CA
● Responsible for quality control statistics on mirrors and aspheric corrector○ 8” diameter scopes and larger, thousands sold annually
● Overhauled the primary mirror bonding method to reduce internal stresses○ Partial bonding using surface priming and releasing agents for RTV
● Debugged optical polishing issues○ Spindle polishing and aspherizing
● Investigated solutions to primary mirror angular shift during focal adjustment○ Microsphere lubrication and teflon bushings
Research and Development EngineerEdmund Industrial Optics, Barrington, NJ
• Chemical tempering of RMR lens• Automated reticle surface inspection system for ACOG using LabVIEW• Automation of Optikos image quality system for ENVG objectives and eyepieces• Spindle polishing experience making parabolas for telescopes• Optical filter fabrication experience• Overseas troubleshooting (Singapore, China, Japan)• Acted as the primary technical resource for the quality assurance department
ENVG
ACOG & RMR Spindle polishing
Thin films
Solar Module DeveloperPrism Solar Technologies, Tucson, AZ
• Simulated holographic film in Zemax by creating a DLL that imports RCWA data• Optimized the glass shape for various cell sizes
Rows of holograms between solar cells
Heterodyne InterferometryLaser Power Delivery
JPL, Pasadena, CANASA-sponsored Space Interferometry Mission
The SIM Satellite
B
Field angle (arcsec)
Heterodyne Interferometer
Dual Output NPRO laser
f1
f2
Lock-In Amplifier
Phase difference = distance
LO
Movable retro
Measurement
BeamSplitter
Mirror
Dual Output NPRO Laser
NPRO LaserND:YAG crystal1.319 um
50:50 SM PM Coupler
AOM +df
AOM -df EVOA
Motor Control Electronics
f1
f2
Adaptive Optics DevelopmentUSAFA, Colorado Springs, CO
JTO funded
Adaptive Optics Concept
Holographic Adaptive Laser Optics System (HALOS)
Hologram Construction Hologram Playback
Signal Out = (A-B)/(A+B)
HALOS system construction
HALOS Physical System
HA
LOS
Cor
rect
ed W
avef
ront
0.43 waves RMS 0.16 waves RMS
HALOS Sensor Electronicsx64
SensL APD array
16 coreXMOS chip x4
DigitalData Bus64 channelsIn
put f
rom
hol
ogra
m
Amp
AnalogData Bus32 channels5 V
120V
Deformable Mirror
USB
XTAG
10k refresh rate(fastest in the industry)
19
Current booster circuit (diode driver)Applications:
- Laser diode or LED driver with variable current- Electrolysis current source
Laser or LED inserted here
Drive current: I = V/R
Laser or LED inserted here
20
Microcontroller Experience
XMOS XS1 audio controller Arduino Uno
21
Multiple Projection MicroscopeUniversity of Arizona, Tucson, AZ
NIH grant
Physical System
Illumination Design No. 1 (patented)
Illumination Design No. 2 (patented)
Cell Images
OVCAR: OVCAR-3 P51progressive adenocarcinoma of the ovary
Endoscope Tube Optics
5 mm
Endoscope Mechanical Design
Hologram Recording System
Argon Laser (488 nm)
dz (automated)
pupil position
dA (automated)
dt (automated)
beam splitter
hologram
rotating mirror
Mechanical Switch DriverFor automating the hologram recording process using existing shutter controls
S1 S2 i
L L 0
H L imaxL H -imaxH H N/A
i
Inductor-driven switch (L1) is controlled by a pulse of current (i).
5V supply is regulated externally
S1 & S2 are TTL control signals (0 - 5 V)
This controls dt via a LabVIEW script
39
Optical Coherence MicroscopeUniversity of Arizona, Tucson, AZ
NIH grant
Optical Coherence Microscope
41
AC coupled signal
OCM Electronics Flowchart
42
Set-gain detector
XMultiplier
Local OscillatorTo piezo100 kHz
100 kHz
Low Pass FilterSignal to DAQ
Amplifier
Variable Gain Amplifier
OCM Images
43
Incoherent Imaging Coherent Imaging
Carcinogenic Fibroblasts
Helicopter Landing Pad Illumination Design
Pharos Marine, Houston, TX
Flashlight Reflector Illumination DesignMag Instruments, Ontario, CA
Wide Angle Cell Phone LensBridge Optix, Phoenix, AZ
Bridge Optix CLS
62° field (actual image) 88° field (simulated image)