title: Lensfree color imaging on a nanostructured chip using compressive decoding.
abstract: We demonstrate subpixel level color imaging capability on a lensfree incoherent on-chip microscopy platform. By using a nanostructured substrate, the incoherent emission from the object plane is modulated to create a unique far-field diffraction pattern corresponding to each point at the object plane. These lensfree diffraction patterns are then sampled in the far-field using a color sensor-array, where the pixels have three different types of color filters at red, green, and blue (RGB) wavelengths. The recorded RGB diffraction patterns (for each point on the structured substrate) form a basis that can be used to rapidly reconstruct any arbitrary multicolor incoherent object distribution at subpixel resolution, using a compressive sampling algorithm. This lensfree computational imaging platform could be quite useful to create a compact fluorescent on-chip microscope that has color imaging capability.
authors.forename: Bahar
authors.initials: B
authors.lastname: Khademhosseinieh
authors.forename: Gabriel
authors.initials: G
authors.lastname: Biener
authors.forename: Ikbal
authors.initials: I
authors.lastname: Sencan
authors.forename: Aydogan
authors.initials: A
authors.lastname: Ozcan