I'm developing a device that requires some method of measuring distance roughly up to around 300mm. I was considering just using one of those cheap ultrasonic sensors.
The issue I have is that the device sits on top of a surface, my fear is that with an ultrasonic sensor its going to just deflect off the surface and give generally inaccurate readings. So ideally what I need is a sensor capable of measuring short distances with a wide horizontal FOV but a very narrow vertical FOV.
I also considered using some sort of laser however since the sensor would be almost at eye level I'm worried about potential eye damage.
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