Can you believe this. A whole new world coming.
http://www.mouser.com/applications/...3655440ad8bdcc6ebfbe7022e&utm_content=5821975
http://www.mouser.com/applications/...3655440ad8bdcc6ebfbe7022e&utm_content=5821975
We phase align *extremely* small frequency spectra. Phased array radar is basically a single frequency, and even then the mechanical structure that anchors the array is formidable. Given the frequency difference between any radar band and visible light, the mechanical tolerance needed to achieve sub-wavelength alignment is ... hard.We already phase align small frequency spectrums now don't we?
???Modulating creates a spectrum.
but why? all you need is to be able to control the projected light pattern electronically. You can do that by altering which leds are on/off vs. the reflector.We could further modulate the sweep RATE
Actually, that doesn't matter (in the context of this discussion). Turning LEDs on and off, no matter how quickly, is basically on-off keying, a form of AM. Phase-aligning the modulation of one with the modulation of other carriers will not get you electronic beam steering. It is the carrier that must be phase-manipulated to get steering, and it is the frequency of the carrier (in this analogy) that is what is too high to phase-align with other carriers of the same frequency.And we don't have leds that can turn on and off fast enough to phase.