About me
My Stats
Areas of Expertise
Areas of Expertise
JOHN GROOT Consulting by appointment
OPTICAL MECHANICAL ENGINEER
Cell Phone 408-313-4958 Stargazer558@yahoo.com linkedin.com/in/john-groot-93887237/
OPTICAL MECHANICAL / MANUFACTURE / DESIGN ENGINEER
SELECT ACCOMPLISHMENTS
- Designed preci
JOHN GROOT Consulting by appointment
OPTICAL MECHANICAL ENGINEER
Cell Phone 408-313-4958 Stargazer558@yahoo.com linkedin.com/in/john-groot-93887237/
OPTICAL MECHANICAL / MANUFACTURE / DESIGN ENGINEER
SELECT ACCOMPLISHMENTS
- Designed precision mechanisms and fixtures for aligning assemblies.
- Re-engineered optical microscope to fit in very small space and added precision focus adjustment.
- Provided cost estimates, materials sourcing, supplier qualification and vendor management.
- Documented parts using PDM.
Areas of Expertise
Areas of Expertise
Areas of Expertise
OPTICAL EXPERIENCE
optical principles & components
optical alignments & metrology interferometry instrumentation
ZEMAX (NON-SEQUENTIAL)
autocollimators & telescopes
Laser Diodes & Fiber Optics MECHANICAL EXPERIENCE
15 yrs. SW, ptc CREO, INVENTOR
machinist, mills, lathes, etc. oscilloscope
OPTICAL EXPERIENCE
optical principles & components
optical alignments & metrology interferometry instrumentation
ZEMAX (NON-SEQUENTIAL)
autocollimators & telescopes
Laser Diodes & Fiber Optics MECHANICAL EXPERIENCE
15 yrs. SW, ptc CREO, INVENTOR
machinist, mills, lathes, etc. oscilloscopes/test equipment
kinematic principles & design DFA, DFM, DFC, DFR, DFX, LASER ALIGNMENT TECHNIQUES ANALYSIS, FEA, THERMAL
GENERAL EXPERIENCE
released part drawings
vendor management
materials sourcing processes instructions
RESUME
Areas of Expertise
RESUME
JOHN GROOT
MECHANICAL ENGINEER/OPTICAL ENGINEER
CELL (408) 313-4958 LinkedIn - john-groot-93887237
SELECTED CHALLENGING ACCOMPLISHMENTS
· Designed unique method to change distance linearly between 8 fibers (25u each) by adjusting 1 screw to compensate for magnification change of collection lens.
- Conceived, built,
JOHN GROOT
MECHANICAL ENGINEER/OPTICAL ENGINEER
CELL (408) 313-4958 LinkedIn - john-groot-93887237
SELECTED CHALLENGING ACCOMPLISHMENTS
· Designed unique method to change distance linearly between 8 fibers (25u each) by adjusting 1 screw to compensate for magnification change of collection lens.
- Conceived, built, and brought to manufacture 2 NIR spectrometers for use in product and OEM
- Designed many very small (<12 mm) optical mounts and adjustment stages which utilize cams, flexures, and micro-screws to adjust millimeter size optics – microns (10u or less). Many of these stages were designed to fit into tight spaces (less than 15mm) and were lockable and able to withstand shock and vibration (20g’s).
- Designed an automated tool for inspecting each face of an 18-sided mirrors for 6 optical and mechanical parameters - reducing inspection time from 30 min/mirror to less than 5 min/mirror.
Professional Experience
(**denotes worked as contractor)
Meta
Sunnyvale, Ca.
Optical Mechanical Engineer
4/2022 to 9/2022**
(contract cancelled)
· Design tooling which would enable a simulated eyeball to replace a person’s head (and eyeball). This would allow tests on the AR platform to simulate any eye tracking systems.
Meta (Facebook),
Redmond WA
Integration Optical Systems Engineer
3/07/21 to 3/04/22**
(contract expired)
· Evaluate Optical and Mechanical Assembly Tooling for manufacturing functionality, using projection optics. Interfaced with offshore company to ensure instrument met company requirements (tolerances of 10 micron or less) and standards.
· 20 years’ experience with SolidWorks,
6 mo. With Siemens NX
· Resided in San Jose, CA, but 100% remote with Redmond, WA
Optopax,
San Jose Ca
Optical Mechanical Engineer
11/26/2020 to 2/21**.PT
(contract cancelled)
· Developed method for camera assembly, then designed the camera fixtures for mass production of these camera assemblies
Frontier Semiconductor,
San Jose, Ca
Optical Mechanical Engineer
10/26/2020 to 2/2021**PT
(contract cancelled)
· Design, build and test White light Interferometer. Developed architecture to incorporate auto alignment features for special microscope objective. Then designed the system into the instrument for computer control.
Covid19 sequestered
3/2020 to 10/2020
Natus Medical,
Pleasanton, Ca
Optical Mechanical Engineer
9/15/19 to 1/31/2020**
(contract cancelled}
Natus Medical, Inc. manufactures products which test infant’s eyes for retinal defects. Build and test complex fiber optics systems for laser imaging systems.
Thermo Fisher Scientific,
Eugene, Or.
Optical Mechanical Engineer
12/2018 to 10/2019**
(contract fulfilled early)
Defined, developed, and prototyped the optical mechanical systems for flow cytometry
- Developed architecture for next gen instrument optical design.
- Designed the reduced size optical system for the forward scatter optical system.
- Wrote specifications for testing and aligning of optical mechanical systems and sub-systems.
- Designed many stages (using sub-millimeter optics) and mechanism which utilized kinematic principles, cams, precision screws and flexures to achieve stability. These stages had precise movements and very small footprints. They were lockable and maintained their position when locked and after being subjected to shock (20g), vibration and thermal stress.
- Designed tools and fixtures to aid in alignment, fabrication, gluing, and assembly
- Developed test procedures to test designs for shock, thermal, and other parameters
Applied Material,
Santa Clara, CA
Optical Mechanical Engineer
3/2018 to 8/2018 **
(contract cancelled)
- Designed precision mechanisms and fixtures for aligning assemblies. (Used Autodesk Inventor)
- Re-engineered optical microscope to fit in small space and added precision focus adjustment.
- Provided cost estimates, materials sourcing, supplier qualification and vendor management.
Frontier Semiconductor,
San Jose, CA
Optical Mechanical Engineer
7/2012 to 3/2018
FSM is a Metrology company specializing in stress management tools for silicon wafers and MEMS.
- Designed precision mounts for lenses, mirror, fiber optics, and other optical elements for capital equipment instruments.
- Lead engineer for 4 junior engineers designing capital equipment.
- Designed, built, and brought to manufacture 2 NIR spectrometers for use in product and for OEM sales.
- Designed auto-focus mechanism using ZEMAX and SolidWorks, for micron accuracy & repeatability
- Designed Capital equipment wafer inspection tools that were based on optics and interferometry.
- Used contact and non-contact measurement types, indicators, cap gages, interferometers.
- Designed air bearing stages for tools using precision motion and translation.
- Wrote inspection and testing procedures for manufacturing to reduce rejects and improve reliability.
- Documented released drawings, assembly, control drawings, purchased part specifications, and BOMs
- Cost reduced several existing instruments which saved many thousands of dollars on their bottom line
- Developed alignment procedures, testing plan, and tooling on new and existing tools.
Aosense, Inc.,
Sunnyvale, CA
Optical-Mechanical Engineer
8/2010 to 7/2012
· Designed over 25 ultra-small lens and mirror mounts using optics which were sub-millimeter in size.
· The mounting plate was 6 inches square and had over 50 elements on it, and contained mirror mounts, beam expander and compressors assemblies, adjustable wave plate holders, beam splitters.
Most of the mirror mounts were adjustable in two axes. The beam expanders (and compressors) had micro-focus and 2 axes of adjustment. All adjustable elements had to have micro-radian sensitivity, lockable, and withstand 10 G of force.
· Designed fixtures of manufacturing assemblies.
University of Florida,
Gainesville, FL
Optical-Mechanical Engineer
1/2007 to 8/2010
- Primary Optical-Mechanical Engineer in charge of integration of optical, electronic, and mechanical aspects for new optical instruments which seek new exo-planets.
- Using data from Optical Engineers for layout and tolerance budget specifications, designed innovative mounts for mirrors, large and small lenses, spectrographs, fiber optics, and other optical components.
- Many components were mm in size and needed precision adjustments for alignment.
- Used FEA analyses when necessary to prove design functionality.
Education and Awards
- AA Degree in Physics, San Jose City College specialization in Laser optics and optical theory
- San Jose State, B.S. Manufacturing Industrial Technology, Specialization in laser technology
- SPIE online Optical System Design course covering laser operation and Theory, Optical theory, Ray tracing, Optical aberrations, Prisms, lenses, filters, polarization, and wave plates.
- SPIE online course Fastening Optical Elements with Adhesives, describe and classify adhesives and how they work, adhesive selection, surface preparation, application, and curing,