Design Examples

These are concept designs that I’ve created for the sole purpose of demonstrating my capabilities.

Double Telecentric Zoom (video)

I designed this 2-4x aspheric zoom to have a fixed total track. It’s also telecentric in both object and image space.

Pancake Lens for VR

This polarization-based “pancake lens” design was inspired by a 2018 Oculus VR patent. Light from a display is converted from p to circular polarization by a quarter waveplate oriented 45 deg relative to the polarization axis. The light is then transmitted through a partially reflective, curved mirror. A second quarter waveplate converts it from circular to s polarization, which is reflected by a curved polarizer. The light then passes through the waveplate two more times, rotating the polarization to p, which is then transmitted to the eye. The folded design allows for a longer focal length in a smaller package.

Pancake lens design

Semi-transparent Mangin Mirror Lens

This F/7 compact lens with external pupil is diffraction-limited over a 20-deg FOV in the visible. It has two “Mangin” type lenses with an air space in between. Straylight could potentially be reduced with polarizers, as in the pancake lens.

Mangin mirror design

Off-axis Reflective Imager

This F/5 off-axis reflective imager is nearly diffraction-limited over a 10-deg FOV. All three mirrors are conic sections and one is biconic.

Folded optical design

Acrylic Freeform Version of Off-axis Reflective Imager

Same design as above, reoptimized as a solid acrylic optic. It’s still nearly diffraction-limited for a single wavelength, but as expected, this version has chromatic aberrations.

Freeform optical design

Navarro Eye Accommodation with Focus Distance (video)

I created this model using formulas from Navarro’s 1985 paper, “Accommodation-dependent model of the human eye with aspherics”. Note that the retinal image remains in focus as the object distance is reduced, until the object is quite close. The crystalline lens radii, conic constants, thickness, and index adjust accordingly, as well as the aqueous chamber thickness.

LED Collimator

I designed this LED collimator for an Osram SoleriQ P9 LED array. It’s solid plastic with a cylindrical recess where the LED is inserted. The rays are either focused by a small lens at the end of the recess or totally internally reflected by the outer boundary.

LED collimator

Lenslet Array Beam Combiner

I designed this hexagonal lenslet array and lens to combine an array of sources.

Laser beam combiner