4 ms·
Looks like typo or "noisy phone". In current fiber-optics solutions using multi-wavelength, so on fiber input mixed 8 or more laser waves of different lengths
by simne 2y ago
Looks like typo or "noisy phone".
In current fiber-optics solutions using multi-wavelength, so on fiber input mixed 8 or more laser waves of different lengths (to be strict not wl but bands) and on output mix divided with optical filter and all wavelengths processed separately.
But you don't have to use exact wavelength in this, you could use any wl within band (yes, 4 colors in each of 40000 bands looking possible), if you have light source with changeable wl and detector with enough precision, and number of wl's could be much larger than in for example LCD or OLED.
Unfortunately, authors of article for some reason don't write about this important nuance, but it mean, in reality to make this technology, need precision light source(s) with adjustable wl's (classic RGB is combination of just 3 wl's, and modern amoleds usually 4 wl's) and precision compact spectrometer (for example, what I seen myself gives 1024 lines for visual spectrum, so just 10 bits). All these are not impossible, but will not easy to achieve.
- simne 2y ago> need precision light source(s) with adjustable wl's.. Or use some substitute technology, for example, calculate diffraction strips digitally and then implement them with modern femto-second laser. So could achieve similar result, but (in case of femto-second laser) trade for much larger time and much more energy to create forever storage.
- simne 2y agoSorry for all, I've mistaken. I have taken careful view and see, they write in each square huge number of interference pictures - somewhere about 1M x 1M, and in calculation they consider 1Billion points with 4 colors in each, so just boolean true/false give close to 2^32 number of variants. And there are 35,960 possible permutations, if use in each point 4 sources of light from 32 possible. These are reasonable considerations about possibilities of current technology. This also not easy way, and I prefer to name it micro spectrogram.