jim williamson technical portfolio

1. Technical Portfolio
Jim Williamson
opticalengineer123@gmail.com

2. What’s Included?
•Consumer Product Work
•Industrial Product Work
Please note: In all these examples below, I have tried to provide
the motivation for the technology created, not just the technical
work alone. Particularly in the cases where I was the primary
inventor, I tired to create a solution that met the requirements of
the customer and also provided a significant ROI and competitive
advantage.

3. Consumer Products
1) Award Winning Vertical Scanner
2) Non-Imaging Illuminator
3) Waveguide Array ScanHead
4) Cell Phone Sensors
5) Optical Storage Film
6) BeatLight Laser Toy

4. 1) Vertical See Thru Scanner: Original Patent
• USPTO 6307649
• Invented to solve Problem of Large Scanner FootPrint
• Envisaged as Fitting over Monitor or Storable off Table

5. 1) Vertical See Thru Scanner :Final Product
Winner of Industrial Design Awards
http://www.idsa.org/awards/idea/computer-equipment/hp-scanjet-4670
Scanner Stand
REMOVABLE
SEE-THRU
SCANNER

6. 2) Non-Imaging Scanner Illuminator
• Non-Imaging Truncated Compound Elliptical Concentrator (CEC)
• Created to Improve Efficiency and reduce System BOM
• Result: $10 savings/scanner (100 k units/mo)
• USPTO 5903404
Scan Line Width only ~100 um
BUT Illumination Width >>1 cm Illumination Width<< 1 cm
Truncated CEC
Designed using ASAP
PROBLEM SOLUTION!

7. 3) Waveguide Array ScanHead
This is a polymer waveguide based image scanner. Designed to eliminate the delicate
optics in conventional document scan systems and, thus, reduce component and assembly
cost. Accomplished by using a polymer waveguide; there are thousands of individual
waveguides in this system. I modeled the entire thing in ASAP. I also performed MTF
and other image quality metrics on the completed array. USPTO 5930433
CCD
Waveguide
Array

8. 4)Design/Simulation Ambient & Proximity Sensors
I built this part in SolidWorks and analyzed its performance in Zemax. These
were designed and built for a customer thru Technical Optics, LLC.
Lens
Light Source
Prox
ALS

9. 5) Optical Storage Phosphors Film Structure
At a time when CCD detectors were expensive and CMOS detectors too noisy, we started a project
to create a “digital film” using an Optical Storage Phosphor. Initial film had poor resolution and crosstalk.
In conjunction with Rick Trutna, I invented this structure which significantly improved the resolution and
limited crosstalk in this system. USPTO 5534702
Storage
Phosphor
Reflective Silicon
Film Structure

10. BeatLight is a niche laser entertainment product that projects various images such
as a Circles, Lissajous patterns, Comic Faces, Words etc. The size of these images changes
in Rhythm to the beat of music played near the BeatLight. This system showcases my skills in E
Design, and Programming
6) BeatLight Laser Toy

11. 6) BeatLight Design Concepts
I designed all these product concepts

12. 6) Sample BeatLight Images*
Images respond (shape, size) to the “Beat” of Sound Source near Device
Beaded Circle
LissajousScript
Smiley Face
* Simulated..It was hard to capture a good image without blur on camera

13. 6) BeatLight Prototype
Analog, Digital, Embedded Electronics Design
I designed the electronics and installed all components

14. 6) BeatLight :Double Sided Printed Circuit Board
I selected the components and did board layout.

15. 6) BeatLight: C Program Example
I Wrote the Code and Programmed
It into MicroController Memory

16. 6) BeatLight Actuator Prototype
I designed and built these Beam Deflectors. They are equivalent in performance to
Galvanometers costing hundreds of dollars, but are compact and inexpensive.
These Devices incorporate Optics, Mechanics, Magnetics, and Electronics

17. 6) BeatLight :FEA of Actuator Magnets
This sim allowed me to optimize magnet design for
optimal field uniformity and strength
Original Design: Low Density Flux Improved Design: High Density Flux

18. Industrial Products
7) III-V Detectors for Instruments
8) Array Detector & Spectrometer
9) Flat Response Detector for Power Meters

19. 7) III-V Photodetector Design and Fabrication
I have designed, built, and tested Large Area and High Speed Photodetectors
similar to the one shown below. These detectors were developed for HP’s
Optical Measurement Systems at the request of our product divisions
and incorporated into systems such as the HP 8504 Precision Reflectometer.

20. 7) III-V Detector: Optical Measurement System
Broadband
Light Source
Monochromator
Fiber
Coupler
Reference
Detector
Parameter
Analyzer
Voltmeter
Computer
Probe Station
Device
Under
Test
Microscope
Camera/Eye
As part of the detector development, I’ve built systems for and performed optical and electrical test.
The system below measures the wavelength response of the device. I’ve also built and operated
similar systems for Optical Fiber Measurement, including Attenuation vs Wavelength, Numerical
Aperture, Frequency Response, OTDR and Refractive Index

21. 7) Typical Measurement Systems
The Detector measurement system and other optical measurement systems are typically
set up on an optical tables and look something like this. I’ve built many measurement
systems in this manner: for fiber optics, detectors, laser test, and scanner/optical pickup.

22. 8) NIR ARRAY DETECTOR & SPECTROPHOMETER
I have also designed, built, and tested Array Photodetectors. These required
creation of significant additional technology due to the close spacing. These
detectors were developed for a NIR Spectrophotometer as an extension to the
existing UV-VIS market. These systems can analyze materials only accessible in the
NIR. I built a similar system as shown and demonstrated liquid Ethanol absorption.

23. 8) NIR Array Detector: Photoetching Diffusion Analysis
The InGaAs Array Detector shown on the previous page had very close
spacing. The Zn diffusion could overlap and short the detectors. I invented
and published this electroless photoetching system for visualizing the Zn
diffusion in adjacent detectors. Also, transferred this technique to our
product division.

24. 9) Flat Response Detector (FReD)
FReD was created in response to a HP Optical Power Meter Division request for
a Photodetector not requiring calibration. I did this by thinning down the epi
and using a compensating filter designed using TFCalc.
Conventional InGaAs Detector
FReD InGaAs Detector
p+ InP
n- InGaAs
n+ InP
n+ InP
Thin n- InGaAs
p+ InP
compensating filter
Conventional
InGaAs
Photodetector
FReD
InGaAs
Photodetector

25. Jim Williamson Summary
•Very Experienced, Broadly Skilled Engineer
•Experience: Optics, Optoelectronics, Test, Materials,
Processing, Research, Design, Development,
Applications, Electronics, Mechanical Design, and
Programming
•Seeking Contract & Unique Full Time Positions
• Contact me at opticalengineer123@gmail.com