The document proposes a new type of adaptive pupil-adjustment glasses called ALAPA glasses. The glasses would use circular polarizers to selectively pass circularly polarized light, UV-blocking layers to react to and absorb UV light, and interference films to create iridescent effects. The glasses would also use a pinhole camera and pupil detection method to monitor the wearer's pupil size under different light conditions. An experiment is proposed to compare the pupil size changes of subjects without and with the ALAPA glasses under varying light levels. The expected outcome is that the ALAPA glasses would be able to adjust the wearer's pupil size to match comfortable light surroundings and benefit those affected by extreme light changes.

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2. OHH！MAN！
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3. Presenter：Haowei Jiang (5016-6365)
EE526LEC000: Wearable & Implantable Sensors
Department of Electrical Engineering,
University at Buffalo
Auto-Lux-Adaptive
Pupil-Adjustment Glasses
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4. Content
Back-
groud
Design
Method
Expected
Outcome
Conclu-
sion

5. 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].
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[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.

6. 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

7. 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!)

8. 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!

9. Background
A new method, ALAPA, is proposed to improve
the overall adaptiveness to sudden lightness
change based on external LUX and pupil size.
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10. Working Principle/Design:
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11. 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).

12. Working Principle/Design:
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[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] .

13. 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.

14. 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.

15. Expected Outcomes/Impacts:

16. Expected Outcomes/Impacts:

17. 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.
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Conclusion:

18. [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.
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Reference

19. THX for watching!~
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