Object Detection and Distance Measurement Sensor based on Light Field Imaging

A sensor that can acquire real-time 4D information of objects from 2D images using deep learning technology

The sensor includes a CCD/CMOS module and a micro-lens array, which was fabricated with our own ultra-precision machining techniques. Using the algorithm created by deep learning, it can identify an object from a 2D image and acquire its 4D light field information in real time for measurement. The sensor is compact, portable and attachable on different types of camera lens for precise distance measurement in various ranges, including micro and macro photography.

The sensors can be used in production lines to perform comprehensive automated quality inspections by examining the accurate measurements of products, such as semiconductor measurements.

Special Features and Advantages

Capable of capturing 4D light field information by taking 2D images
Capable of detecting the target object and measuring the distances between the lens and it
Compatible with any camera lens or microscopic objective lens with 4x or 10x magnification
Low in production cost
Highly accurate with 3% error rate in distance measurement and 0.5% error rate in height value measurement during product inspection.

Applications

Measuring objects in the range of 10 cm to 50 m

Measuring height values of objects for real-time inspection of products, e.g. semiconductors and claw settings of jewellery

Observing the 3D structure information of live body tissues for medical diagnosis

Award & Patents

Gold Medal – The 71st International Trade Fair “Ideas – Inventions – Novelties”, Nuremberg, Germany (Nov 2019)

Patent No.:

ZL201410357264.2(China)

Patent Application No.:

201510028430.9 (China). 201810691605.8 (China), 201810213125.0 (China)

Principal Investigator

Dr Lihua LI

Department of Industrial and Systems Engineering

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Object Detection and Distance Measurement Sensor based on Light Field Imaging