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Keep Focus

Wearable Magnifying Lens with Rapid Autofocus

V1, 2022


Nathan Decurnex
Nicolas Nouel
Michael Richter
Erik Mortenson
Renata Osypova

Laser Time of flight sensor, stepper motor, Arduino, PETG

We illustrate a wearable device that is a rapid autofocus magnifying lens. We aim to improve comfort and efficiency of manual precision work, such as surgery or watchmaking, by providing wearable glasses that automatically and rapidly focus on the object of interest while magnifying the image.

Designing a device that is able to rapidly focus on a target presents a complex challenge as it requires a precise and absolute mapping between the distance to the target and the focal positioning.

During the demonstration, we will demonstrate the autofocusing of our device through the camera of a cell phone with its autofocus disabled. The visitors will also be able to wear the monocular and look at any objects of interest. Our device will automatically adjust itself to provide a clear focused image for its user.

With this prototype, we demonstrate that it is possible to wear an optical element that magnifies and focuses on objects in sight at several distance ranges, even if the user frequently switches the working distance.

This device can be adapted as a medium range focusing tool for visually impaired patients in everyday life as it could help them to comfortably see any object magnified and focused. This technology could also be used in nature observation at close range to magnify plants and insects.

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