Patent ID: 9735303
Date: 2017-08-15
CPC Classifications: H01L,H04N

Claim:
1. A method for implementing a color lensless camera without any lenses, without any visible-band light-frequency selective optical filters, and at most an ultraviolet light-frequency optical filter, the method comprising: receiving light from a light field, the received light comprising a color composition and an amplitude distribution; applying at least a portion of the received light to an array of at least three LEDs of differing emission colors to create respectively associated light amplitude measurement signals, the emission colors comprising a lowest-value wavelength, a highest-value wavelength, and at least one mid-value wavelength having wavelength value between the lowest-value wavelength and the highest-value wavelength; producing a first output signal by subtracting a first function of the light amplitude measurement signal associated with the mid-value wavelength LED from a function of the light amplitude measurement signal associated with the highest-value wavelength LED; producing a second output signal by subtracting a second function of the light amplitude measurement signal associated with the lowest-value wavelength LED from a function of the light amplitude measurement signal associated with the mid-value wavelength LED; and producing a third output signal by taking a third function of the light amplitude measurement signal associated with the lowest-value wavelength LED, wherein the first output signal, second output signal, and third output signal are responsive to the color composition and amplitude distribution of received light, wherein no visible-band light-frequency selective optical filters are introduced between the light field and the array of at least three LEDs of differing emission colors, wherein no lenses are introduced between the light filed and the array of at least three LEDs of differing emission colors, and wherein no lenses are introduced between the light field and the array of at least three LEDs of differing emission colors, and providing resulting signals of the first output signal, the second output signal, and the third output signal to a synthetic optics image formation algorithm so as to implement a lensless camera for imaging objects physically separated from the array of at least three LEDs.