4.2.2 - Compact MicroLED-Based Lensless Microscope for Real-Time Airborne Cloud Droplet Sensing
- Event
- EUROSENSORS 2026
2026-09-06 - 2026-09-09
Zurich - Band
- Lectures
- Chapter
- Optical Sensors
- Author(s)
- A. B. Dharmawan, R. G. Gibilisco, J. D. Prades - Technische Universität Braunschweig,Braunschweig (Germany), J. Saturno, A. Nowak, C. Pöhlker - Physikalisch-Technische Bundesanstalt (PTB),Braunschweig (Germany)
- Pages
- 138 - 139
- DOI
- 10.5162/eurosensors2026/4.2.2
- ISBN
- 978-3-910600-12-6
- Price
- free
Abstract
We present a microLED-based lensless microscope, an imaging system that is compact, lightweight, energy-efficient, and capable of capturing airborne microdroplets. It consists of a microLED as a light source and a CMOS image detector and operates based on inline holographic microscopy. The microscope records holographic images of airborne microdroplets, which are then reconstructed using a Fourier-transform-based backpropagation algorithm. During testing, a microdroplet dispensing system was used to generate droplets with controlled sizes. The results showed that the LED-based lensless microscope could capture clear microdroplet images. After reconstruction, the images were comparable to those obtained using a lens-based camera. Based on the results, the proposed lensless microscope is suitable for monitoring airborne water droplets in both controlled laboratory environments and real-world field conditions.