Patent application number | Description | Published |
20090046249 | IRIS IMAGING USING REFLECTION FROM THE EYE - A rapid iris acquisition, tracking, and imaging system can be used at longer standoff distances and over larger capture volumes, without the active cooperation of subjects. The captured iris images can be used for biometric identification. Light illuminates the subjects' eyes. Reflections from the eyes are used to steer a high resolution camera to the eyes in order to capture images of the irises. | 02-19-2009 |
20090046899 | COMBINED IRIS IMAGER AND WAVEFRONT SENSOR - An iris imaging system used for biometric identification provides a combined iris imager and wavefront sensor. The detector array allows for independent readout of different regions, such that a wavefront sensor region can be read out fast while allowing signal to integrate on the iris imaging region. Alternatively, the entire array may be used for wavefront sensing during an acquisition phase, and then at least a portion of the array may be switched to be used for iris imaging during a subsequent imaging phase. An optical periscope optionally allows various optics to be inserted in front of the combined iris imager and wavefront sensor. In another embodiment, the glint image of an on-axis or near on-axis illumination source is picked off at the image plane and directed to the wavefront sensor optics, while allowing all of the light from the iris field to pass through to the iris imaging camera. | 02-19-2009 |
20100172649 | Free-Space Optical Transceiver Using Multimode Fiber to Couple Single Mode Input Optical Signal - An optical circulator couples optical fibers of dissimilar modes. In one embodiment, an optical circulator couples a single mode first fiber to a multimode second fiber, which is used as an optical input to a telescope. The multimode fiber does not significantly degrade the mode structure of the light form the single mode fiber. In the reverse direction, light received by the telescope is coupled into the multimode second fiber, which the circulator couples to a multimode third fiber. | 07-08-2010 |
20120308235 | Integrated Commercial Communications Network Using Radio Frequency and Free Space Optical Data Communication - A stabilized ultra-high bandwidth capacity transceiver system that combines an E-band (71-76 GHz, 81-86 GHz) millimeter wave RF transceiver with an eye-safe adaptive optics Free Space Optical (FSO) transceiver as a combined apparatus for simultaneous point-to-point commercial communications. The apparatus has a high degree of assured carrier availability under stressing environmental conditions. The apparatus establishes and maintains pointing and stabilization of mmW RF and FSO optical beams between adjacent line of sight apparatuses. The apparatus can rapidly acquire and reacquire the FSO optical carrier link in the event the optical carrier link is impaired due to adverse weather. | 12-06-2012 |
20130088583 | Handheld Iris Imager - A portable, hand held iris imaging system captures iris images that may be used in biometric identification. The system includes an illumination source for illuminating a subject's eye and a camera to capture light reflected from the subject's eye. An optical element positioned between the illumination source and the camera focuses light reflected from the subject's eye onto the camera. A controller receives the captured image and provides it to a display. If the system is not correctly positioned for iris image capture, the display may also provide visual feedback regarding how the system can be properly repositioned. The system includes a housing with a portable form factor so that it may be easily operated. | 04-11-2013 |
20130089240 | HANDHELD IRIS IMAGER - A portable, hand held iris imaging system captures iris images that may be used in biometric identification. The system is constructed using two separate but coupled subsystems. A first subsystem augments the underlying functionality of the second subsystem. The first subsystem uses an iris camera to capture iris images. A tunable optical element positioned between the subject and the iris camera focuses light reflected from the subject's eye onto the iris camera. A controller coordinates the capture of the iris image with the second subsystem. The second subsystem captures face images of the subject, which are provided to a display through a computer. The user interface is overlaid over the face images to provide visual feedback regarding how the system can be properly repositioned to capture iris images. The system has a portable form factor so that it may be easily operated. | 04-11-2013 |
20140248048 | SIMPLE LOW COST TIP-TILT WAVEFRONT SENSOR HAVING EXTENDED DYNAMIC RANGE - A low cost, high reliability system for correcting aberrations in optical signals is disclosed. A foreoptic assembly, such as a telescope, receives an incoming optical signal and directs it to an active optical element, such as a fast steering mirror. The incoming optical signal is diffracted by a diffractive optical element to shape the image that is formed at a wavefront sensor, such as a quad-cell. The wavefront sensor measures a tip-tilt aberration of the incoming optical signal and the active optical element is adjusted to correct the measured aberration. An outgoing optical signal can be transmitted along substantially the same optical path as the incoming optical signal, but in the opposite direction. Thus, the aberration measured from the incoming optical signal can be automatically accounted for in the outgoing optical signal. | 09-04-2014 |
20150098707 | Integrated Commercial Communications Network Using Radio Frequency and Free Space Optical Data Communication - A stabilized ultra-high bandwidth capacity transceiver system that combines an E-band (71-76 GHz, 81-86 GHz) millimeter wave RF transceiver with an eye-safe adaptive optics Free Space Optical (FSO) transceiver as a combined apparatus for simultaneous point-to-point commercial communications. The apparatus has a high degree of assured carrier availability under stressing environmental conditions. The apparatus establishes and maintains pointing and stabilization of mmW RF and FSO optical beams between adjacent line of sight apparatuses. The apparatus can rapidly acquire and reacquire the FSO optical carrier link in the event the optical carrier link is impaired due to adverse weather. | 04-09-2015 |