except there is no magenta phosphor----is just a mix of red and blue phosphors that emit red and blue lines that looks "pink" --the guy also talks about "green laser diodes" DPSS 532nm laser diodes from Thor Labs and as we know there are no 532nm laser diodes. The guy is mixing apples and oranges all over the place in the patent and clearly has no idea of what he is talking about. "white laser" the guy even says. What does the brightness of green to the human eye have to do with making a white headlight----green to the eye is green not anything else--what does he mean a mostly greenish white from a "magenta" phosphor that doesn't exist and emits a mix of red and blue lines??
To me the patent looks like mostly a pantload of you know what. Color is not a physical property; it is merely the brain’s interpretation of different wavelengths of light.
from the patent "According to one embodiment of the present invention, FIG. 3A shows one configuration of using green laser and magenta phosphor to produce diffused white light beams. The green laser beams 302 are produced by one or more laser diodes or green laser sources 304. In one embodiment, an array of green laser diodes 532 nm DPSS Laser Diodes from Thorlabs, Inc. located at 56 Sparta Ave, Newton, N.J. 07860, are used. The green laser beams 302 are coupled to a filter or a coating 306 made of phosphor in magenta. Magenta is a purplish red color and one of the three primary colors of the subtractive CMYK color model. As shown in FIG. 1, magenta is located midway between red and blue. Depending on implementation, there are some ways to obtain magenta phosphor. In one embodiment, the magenta phosphor is produced by mixing blue phosphor with reddish orange or red phosphor. By mixing the blue phosphor and the red phosphor in a predefined ratio (e.g., 20:80 or 50:50), the resulting phosphor emits a pink color in a CIE chromaticity diagram. The wavelength spectrum of the resulting phosphor actually shows two peaks of a blue and a red wavelength, but a user cannot differentiate the separate colors but rather sees only the mixed pink color." See the entire patent here:
United States Patent: 9328887
Maybe the guy is just trying to Patent "me too" laser driven headlight system, that nobody wants because it is not economically viable, powered by 532nm green laser light instead of blue as BMW uses. You are not going to get much of a headlight out of a Thor Lab 10 or 40mW 532 dpss "diode". Tthe cost $175 each for the 40mW model not to mention the need for temperature controlled laser diode mounts as they only operate efficiently between 20 and 25 degrees C--see:
https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=5597 Just what every auto maker needs headlight system with a duty cycle of maybe a few minutes that costs thousands dollars per headlight and is temperature sensitive and unstable.
BMW's headlight technology is powered by lasers, but the important thing to note is that when you look into them, you're not looking at an actual laser. What happens with each light is that three blue lasers positioned at the rear of the assembly fire onto a set of mirrors closer to the front. Those mirrors focus the laser energy into a lens filled with yellow phosphors. The yellow phosphors, when excited by the blue laser, emits an intense white light. That white light shines backward, onto a reflector. The reflector then bounces the more diffused white light forward, shining it out of the front of the headlight casing as a beam
