I’m relatively new to all of this and I’m working on my first MT project and had an idea that I thought I would sanity check. LLP works with the laser plane above the actual acrylic surface, and is subject to the occlusion issues mentioned (and alleviated somewhat by multiple lasers). This isn’t perfect in some scenarios (for example an upside down cup would occlude any touches inside the cup), and I was wondering if a hybrid solution could be obtained.
Using LLP above the acrylic, and then IR LEDs shined inside the acrylic from the sides. This would allow for IR light to reach fully occluded areas of the panel, not as strongly, and this optionally may be something the blob detection software would have to accomidate (detect areas as occluded and properly adjust sensitivity).
The second part of my idea, and I’m not so sure this would work either, would be the use of IR reflective tape on the bottom of control objects, as I’m assuming perfectly perpendicular edges of objects that do not diffuse IR will not be detected by LLP, the use of the IR LEDs allow the objects ontop of the acrylic to reflect down to the detector.
Am I way off base? Am I onto something? Has it been done before?
