12mm Liquid Lens for 1.1″ Sensors Solves Challenges in Logistics

12mm Liquid Lens for 1.1″ Sensors Solves Challenges in Logistics

Optotune and VS Technology present the first wide-angle liquid lens solution for high resolution 1.1″ sensors. With the ability to focus from 100mm to infinity in 20ms, the new 12mm lens is a very reliable and fast focusing solution for today’s logistics and robotics applications.

Image 2 | When focusing up close, the additional optical power of the liquid lens results in a beneficial zoom effect. (Image: Optotune AG)

Image 2 | When focusing up close, the additional optical power of the liquid lens results in a beneficial zoom effect. (Image: Optotune AG)

Following the joint release of five telecentric lenses, the two Swiss and Japanese companies kicked off a collaboration on an entocentric lens. Why start with the focal length of 12mm? Although this might sound challenging, this is exactly what the fast-growing logistics market needs: parcels of different sizes need to be handled automatically. Vision systems are key to automate sorting, palletizing and bin picking tasks. But the depth of field (DOF) of fixed focus optics is usually not sufficient to cover the required working distance ranges. Attempts in squeezing the optics to high f-numbers and overs-spending on lighting typically result in poor performance. The current existing alternatives, which mostly consist of either bulky and often unreliable mechanical focusing systems or expensive and complex multiple camera systems, are not versatile enough to adapt to industrial demands. With about 250 million parcels shipped each day globally, improved reliability, through-put and read-rates are key to achieving the ambitious targets of short-term delivery. These necessities call for a fast, flexible and yet reliable solution for focusing. While this 12mm lens has been optimized for bar-code reading, it can also benefit quality control applications that require high accuracy. For example, robot-based inspection systems can become a lot more flexible and efficient. An image taken at a far distance (e.g. 1m) can provide an overview while an image at a short WD (e.g. 200mm) will provide higher magnification. The 5x zoom in this case allows the inspection of vastly differing fields of view with the same vision system, resulting in maximal flexibility.

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Optotune AG

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