LUMETRICS, INC. Patent applications |
Patent application number | Title | Published |
20160123716 | ASSOCIATED INTERFEROMETERS USING MULTI-FIBER OPTIC DELAY LINES - An interferometer apparatus which include two or more coupled fiber optic Michelson interferometers using fiber optic stretches which stretch two or more optical fibers wound around the perimeter of the optical fiber stretchers by the same amount is disclosed. Preferably a pair of reference and sample fiber optic stretches are utilized which run in a push-pull mode of operation. When one of the interferometers is a coherent light interferometer it can be used as a reference distance scale for all of the remaining low coherence light interferometer. A method for measuring a physical property of a device under test is also disclosed using the apparatus of the present invention. | 05-05-2016 |
20150297401 | TORIC INTRAOCULAR LENS MEASUREMENT APPARATUS AND METHOD - An apparatus for determining the angular error in the placement of fiducial marks on a toric intraocular lens with respect to the true location of a meridional axis of the intraocular lens, the fiducial marks defining an estimate of the angular orientation of the meridional axis of the intraocular is disclosed. The apparatus includes a rotatable intraocular lens holder coupled to drive assembly and an actuator which are mounted into an optical measurement cell receptacle of a wavefront measuring instrument or an angular error measuring instrument. A method for determining the angular error in the placement of fiducial marks on a toric intraocular lens with respect to the true location of a meridional axis of the intraocular lens is also disclosed. | 10-22-2015 |
20150204756 | APPARATUS AND METHOD FOR EVALUATION OF OPTICAL ELEMENTS - An apparatus for measuring the optical performance characteristics and dimensions of an optical element comprising a low coherence interferometer and a Shack-Hartmann wavefront sensor comprising a light source, a plurality of lenslets, and a sensor array is disclosed. The low coherence interferometer is configured to direct a measurement beam along a central axis of the optical element, and to measure the thickness of the center of the optical element. The light source of the Shack-Hartmann wavefront sensor is configured to emit a waveform directed parallel to and surrounding the measurement beam of the interferometer, through the plurality of lenslets, and to the sensor array. A method for measuring the optical performance characteristics and dimensions of a lens using the apparatus is also disclosed. | 07-23-2015 |
20140253907 | APPARATUS AND METHOD FOR EVALUATION OF OPTICAL ELEMENTS - An apparatus for measuring the optical performance characteristics and dimensions of an optical element comprising a low coherence interferometer and a Shack-Hartmann wavefront sensor comprising a light source, a plurality of lenslets, and a sensor array is disclosed. The low coherence interferometer is configured to direct a measurement beam along a central axis of the optical element, and to measure the thickness of the center of the optical element. The light source of the Shack-Hartmann wavefront sensor is configured to emit a waveform directed parallel to and surrounding the measurement beam of the interferometer, through the plurality of lenslets, and to the sensor array. A method for measuring the optical performance characteristics and dimensions of a lens using the apparatus is also disclosed. | 09-11-2014 |
20120287255 | PORTABLE FUNDUS CAMERA - A portable hand-held camera for imaging the fundus of an eye, the camera comprising a housing comprising an internal cavity terminating at a forward housing end, a forward lens, and a light source configured to direct light from locations distributed around the perimeter of the forward lens forwardly out of the housing end. In other embodiment, a portable hand-held camera for imaging the fundus of an eye includes optics configured to focus light reflected back from the fundus onto an image receptor, with the optics being capable of varying the field of view among differing portions of the fundus. Methods to ensure unique image identification and storage are described. | 11-15-2012 |
20120013913 | FIBER-BASED INTERFEROMETRIC DEVICE FOR MEASURING AXIAL DIMENSIONS OF A HUMAN EYE - An apparatus for measuring a layered object comprising a low coherence light source, a coherent light source, and an interferometer including a reference arm and a measurement arm. The reference arm is comprised of a first section of polarization maintaining optical fiber engaged with a first fiber stretcher. The measurement arm is comprised of a second section of polarization maintaining optical fiber engaged with a second fiber stretcher. The first and second fiber stretchers are driven so as to alternatingly vary the lengths of the first section of polarization maintaining optical fiber and the second section of polarization maintaining optical fiber, thereby causing interference signals with the low coherence light when the length of the reference arm is equal to the length of the measurement arm including the distance from the second section of polarization maintaining optical fiber to any of the surfaces of the layers of the object. | 01-19-2012 |
20110128552 | ROTATIONAL AND LINEAR SYSTEM AND METHODS FOR SCANNING OF OBJECTS - A scanning system comprised of a multi-axis drive module comprised of a first linear drive operable along a first axis, a second linear drive joined to the first linear drive and operable along a second axis non-parallel to the first axis, and a first rotary drive mounted on the second linear drive, operable around an axis parallel to the first axis, and comprised of a rotary fixture for holding the object. A first optical probe is provided for scanning the object. The rotary fixture for holding the object may include a central object-receiving port. A first fluid circuit may be provided, which is in communication with the central object-receiving port. In that manner, an internal cavity of the object may be pressurized through a passageway in the portion of the object that is disposed in the central object-receiving port, thereby stabilizing a region of the object to be scanned. | 06-02-2011 |
20110090461 | APPARATUS FOR MEASUREMENT OF THE AXIAL LENGTH OF AN EYE - An apparatus for measuring the axial length of a human eye, the apparatus comprising a low coherence light source; a beam splitter; a fast displacement module for rapidly varying the path length within a reference arm of an interferometer; a laser directing a laser beam that is co-propagating with light from the low coherence light source into the displacement module. | 04-21-2011 |