1

OHH！MAN！

2

Presenter： Haowei Jiang (5016-6365)EE526LEC000: Wearable & Implantable

SensorsDepartment of Electrical Engineering,

University at Buffalo

Auto-Lux-Adaptive Pupil-Adjustment

Glasses

3

Content

Back-groud

Design Method

Expected Outcome

Conclu-sion

Background

By applying the circular filter plate, the polarization effect can be secured in the glasses. A color-sensitive, UV-blocking lenses can be additively inter-laced with silver-halide polymer to achieve a better eye-comfort under exposure to actinic radiation [1]. Interference films could also be surface-layered to generate the iridescent effect which is visible to outsiders but wearers [2].

“

”[1] Joseph E. Pierson, Stanley D. Stookey, 1976. Method for Making Photosensitive Colored Glasses. US736,517.[2] Michael Black, Vladimir Kupershmidt, 1991. Liquid Crystal Sunglasses with Selectively Color Adjustable lenses. US640,042.

Background

1 Polarization Effect• The oscillation direction of Natural light is at random

• Circular polarizers (filters), can be used to create circularly polarized light or alternatively to selectively absorb or pass clockwise and counter-clockwise circularly polarized light.

• (https://en.wikipedia.org/wiki/Polarizer#Circular_polarizers)

• Summary: select & allow lights with certain phase passing though

Background

2 UV-blocking• Refers to Photo-Chromism• Used to describe compounds that undergo a reversible

photochemical reaction where an absorption band in the visible part of the electromagnetic spectrum changes dramatically in strength or wavelength.

• (https://en.wikipedia.org/wiki/Photochromism)

• Summary: chemical inside reacts with UV (absorb it!)

Background

3 Interference films • Thin-film interference occurs when incident light waves

reflected by the upper and lower boundaries of a thin film interfere with one another to form a new wave.

• (https://en.wikipedia.org/wiki/Thin-film_interference)

• Summary: recall oily bubble!

Background

A new method, ALAPA, is proposed to improve the overall adaptiveness to sudden lightness change based on external LUX and pupil size.

“

”

Working Principle/Design:

①

②

③④

⑤

Working Principle/Design:ALAPA Glasses model with

pinhole camera in the center.

Layers Structure. Liquid Crystal surfaced with Interference Film → Silver Halide Polymer → Linear Polarizer + Quarter Wave Plate (Circular Polarizer).

Working Principle/Design:

④

[3] Cho C. W, Lee J. W, Lee E. C, Park K. R, A Robust Gaze Tracking Method by Using Frontal Viewing and Eye Tracking Camera. Optical Engineering, 2009, 48: 127202-127202-15.

Overall Procedure of the proposed eye/pupil detection method [3] .

Expected Outcomes/Impacts:We pre-set the LUX parameter (80 LUX - level 6 - toilet lighting) by

pressing the LUX-lock button when the tester’s pupils are adaptive to test environment (the initial diameter is about 4mm with pre-set LUX).

Luminance Examples LUX Level-step Curve in logarithms.

Blank Experiment

Expected Outcomes/Impacts:

We trace both left & right pupil diameter change following the LUX curve without ALAPA glasses, with it in the experiment group.

Expected Outcomes/Impacts:

Expected Outcomes/Impacts:

We have figured out an achievable way to adjust the human pupil size to match comfort light surroundings using the pupil detection & adaptive polarization. This design will be health-oriented for those who suffer extreme light changes and back for the growing fashion.

”

“

Conclusion:

[1] Joseph E. Pierson, Stanley D. Stookey, 1976. Method for Making Photosensitive Colored Glasses. US736,517.

[2] Michael Black, Vladimir Kupershmidt, 1991. Liquid Crystal Sunglasses with Selectively Color Adjustable lenses. US640,042.

[3] Cho C. W, Lee J. W, Lee E. C, Park K. R, A Robust Gaze Tracking Method by Using Frontal Viewing and Eye Tracking Camera. Optical Engineering, 2009, 48: 127202-127202-15. ”

“

Reference

THX for watching!~

19