Patent application number | Description | Published |
20110268389 | TILED BRAGG GRATING AND LASER SYSTEMS THEREFROM - A tiled Bragg grating (BG) includes a plurality of BGs that are paralleled and optically contacted to one another. Each BG includes an optically transparent substrate within a predetermined wavelength or wavelength range having a length dimension and a transverse dimension. The BGs have a grating period along their length dimension. The BGs have optical contact regions along edges in their transverse dimension where the BGs are optically contacted to one another. | 11-03-2011 |
20120105586 | LATENT FINGERPRINT DETECTORS AND FINGERPRINT SCANNERS THEREFROM - An automatic fingerprint system includes an optical sensor having a first light source that provides a collimated beam for interrogating a first sample surface, and a camera including a lens and a photodetector array having a camera field of view (FOV | 05-03-2012 |
20120154903 | MONOLITHIC FIXED OPTICAL DELAY GENERATORS - A monolithic fixed optical delay generator includes an optical substrate having a front face and a back face. A front coating is on the front face and a back coating is on the back face. The front coating is (i) highly reflective to a first wavelength and highly transmissive to a second wavelength while the back coating is highly reflective to the second wavelength, or (ii) the front coating is highly reflective to the second wavelength and is highly transmissive to the first wavelength while the back coating is highly reflective to the first wavelength. | 06-21-2012 |
20130301887 | LATENT FINGERPRINT DETECTORS AND FINGERPRINT SCANNERS THEREFROM - This document relates to systems and method for latent fingerprint detection using specular reflection (glare). An exemplary system may include a light source alignment portion configured to align a light source at an illumination angle relative to a sample surface such that the light source illuminates a sample surface so that the surface produces specular reflection. The system may also include a specular reflection discriminator that directs the produced specular reflection to an optical detector aligned relative to said sample surface at an alignment angle that is substantially equal to an angle of reflection of the produced specular reflection. Preferably, the directed specular reflection does not saturate the optical detector; and the optical detector captures the specular reflection from the sample surface and generates image data using essentially only the specular reflection. | 11-14-2013 |
20140254894 | LATENT FINGERPRINT DETECTORS AND FINGERPRINT SCANNERS THEREFROM - This document relates to systems and method for latent fingerprint detection using specular reflection (glare). An exemplary system may include a light source alignment portion configured to align a light source at an illumination angle relative to a sample surface such that the light source illuminates a sample surface so that the surface produces specular reflection. The system may also include a specular reflection discriminator that directs the produced specular reflection to an optical detector aligned relative to said sample surface at an alignment angle that is substantially equal to an angle of reflection of the produced specular reflection. Preferably, the directed specular reflection does not saturate the optical detector; and the optical detector captures the specular reflection from the sample surface and generates image data using essentially only the specular reflection. | 09-11-2014 |
20150227773 | LATENT FINGERPRINT DETECTORS AND FINGERPRINT SCANNERS THEREFROM - An automatic fingerprint system includes an optical sensor having a first light source that provides a collimated beam for interrogating a first sample surface, and a camera including a lens and a photodetector array having a camera field of view (FOV | 08-13-2015 |
20150317505 | LATENT FINGERPRINT DETECTORS AND FINGERPRINT SCANNERS THEREFROM - This document relates to systems and method for latent fingerprint detection using specular reflection (glare). An exemplary system may include a light source alignment portion configured to align a light source at an illumination angle relative to a sample surface such that the light source illuminates a sample surface so that the surface produces specular reflection. The system may also include a specular reflection discriminator that directs the produced specular refection to an optical detector aligned relative to said sample surface at an alignment angle that is substantially equal to an angle of reflection of the produced specular reflection. Preferably, the directed specular reflection does not saturate the optical detector, and the optical detector captures the specular reflection from the sample surface and generates image data using essentially only the specular reflection. | 11-05-2015 |