1 SM

Skills and Experience

Programming

Optical System Design and Analysis

Innovations

2 SM

29 issued US patents

•Licensing programs developed•Hollow Light Tunnel (HLT) in 2001•Transitioned from exclusive to non-exclusive in 2005•TIR Prism in 2005

•Majority of royalties derived from settlements• $9.7 MM in OI generated since inception• $8.1 MM over last four years

(“Equivalent sales” at 20% OI ~ $50 million)

Pending

Mini TIR prism configuration

3 SM

RPTV Optical Enginesbased on 3M Vikuiti Core

No aspherical lensesTwo identical fold mirrors with

aspherical reflective surfacesTotal dichroic area is 24 cm2

Equal optical path in all three channelsRed/Cyan dichroic has AOI=32°No aspherical optics

xTotal dichroic area is 34 cm2

xFootprint is the problem

xThree aspherical glass lensesxNo mirror in red channelxTotal dichroics area is 37 cm2

Design

4 SM

Optical Engine for Micro Projector

25 mm

18 mm

depth = 8.0 mm

LED with extracting lens and hollow integrator

QWP with reflective polarizer

Projection lensPBS

Fold mirror

LCoS

Geometrical Collection Efficiency is etendue limited

25x16x8 mm

Design

5 SM

Micro ProjectorIllumination System Performance

2 mm 1 mm

Geometrical collection efficiency is ~96% of etendue limitation

Overscan and illuminance uniformity

Color uniformity vs. pipe length

3 mm

Design & Analysis

6 SM

Polarization Color Combiner

QWP@45°

QWP@45°

Blue LED

Green LED

Red LED

mirror

mirror

S-polarizationP-polarizationRandom or circularpolarization

Blue/Red

ColorSelect Filter

Green/Magenta ColorSelect Filter

22.65 mm

23.1

mm

Footprint 120 x 43 x 128 mm

Design

Circular polarization

Measured efficiency: ~25%

Polarization Recycling

7 SM

Veiling GlareTo compute and visualize criteria for mechanical design without reflection from internal non-optical surfaces

Imager space Screen space

Surface invisible from imager space

Surface invisible from screen space

Design Technique and Programming

8 SM

Veiling GlareWorking screen

Computed data (preview)

Tabular and/or graphical user interface to visualize complicate geometry

Design Technique and Programming

9 SM

RainbowOrthodontic 3D camera uses photographic color slide with required density distribution

Non-linear response of photographic film is the challenge!

Programming

10 SM

Opto-Mechanical Sensitivity Optomechanical Sensitivity and Tolerancing. SPIE Vol. 3786, pp. 220-228, 1999

Rotation around c1 - center of curvatureof left surface

Rotation around c2 - center of curvatureof right surface

Fig. 2 Clearance ef fect on posit ion of opt ical element for various mechanical layouts

Datum axis

Elementaxis

Vertical displacement

Nominalposition

- contact with the barrel- retainer

clearance

Element axis

Element axis

c1 c2

Illustration of conceptual approach for clearance(one of 13 possible primary errors)

Design Technique and Programming

11 SM

A few examples of UIOpto-Mechanical Sensitivity Design Technique and Programming

12 SM

Visualization of computed result (WYGWYS)

Opto-Mechanical Sensitivity Design Technique and Programming

13 SM

LightTools Hardcopy Output to print all LT model content

Programming for LightTools

14 SM

LightTools Illuminance Mesh(to visualize and calculate light patch overlapping over the target)

Programming for LightTools

15 SM

LightTools Menu floating menu with child hierarchy to save screen real estate and to avoid blind menu items

Developed floating always-on-top menu with two formats which are available at run-time

Monitor resolution: 1280 x 1024

15% (!)

Monitor resolution:1024 x 768

20% (!)

missing Items (!!)

Programming for LightTools

16 SM

Solar Concentrator Programming for Solid Works

Shown geometry does not represent real design and used for illustration of Solid Works macro output only.

17 SM

38 mm DIA

12 mm

Reflective component(hollow, mirrored surface)

Refractive component(PMMA)

LED is inside hollow reflector

Irradiance across the field

00.10.20.30.40.50.60.70.80.9

1

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0field angle, degrees

rela

tive

irrad

ianc

e

94.7% energy inside this radius(geometrical, no Fresnel loss)

Luminance Distribution at 7.5 meters away

Example of LED-based Luminare for Uniform Light Intensity

Design for General Illumination

18 SM

Skills and Experience

Programming

Optical system design and analysis

Innovations

Summary