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| Number | Title | Issue Date |
| 7995191 | Scannerless laser range imaging using loss modulation A scannerless 3-D imaging apparatus is disclosed which utilizes an amplitude modulated cw light source to illuminate a field of view containing a target of interest. Backscattered light from the target is passed through one or more loss modulators which are modulate... | 08/09/2011 |
| 7295290 | Coherent laser radar To obtain a coherent laser radar device that realizes high reliability and the high output of a transmitted light, the device includes a first optical coupler that branches a laser beam from a laser source into two lights, a local light and a transmitted light, an o... | 11/13/2007 |
| 7259844 | High throughput darkfield/brightfield wafer inspection system using advanced optical techniques The broadband brightfield/darkfield wafer inspection system provided receives broadband brightfield illumination information via a defect detector, which signals for initiation of darkfield illumination. The defect detector forms a two dimensional histogram of the d... | 08/21/2007 |
| 7224444 | Method and device for optically measuring distance The invention relates to a method for optical distance measurement, in which a transmitter of a transmission branch (14), which branch is integrated with a measuring device (10), transmits a modulated measurement beam (16, 36) in the direction o... | 05/29/2007 |
| 7023531 | Laser distance measuring device with phase delay measurement A laser distance measuring device (1) includes a laser diode (4) for emitting a high frequency intensity modulated measurement light beam (3) and connected with a signal generating unit (SGU) that generates a high frequency measurement signal ( | 04/04/2006 |
| 6987256 | Polarized semi-active laser last pulse logic seeker using a staring focal plane array An improvement in a semi-active laser last pulse logic missile seeker is disclosed and claimed. In one embodiment, the improvement includes a first polarizer disposed in the detection field of view of the PIN photodiode detector and a second polarizer disposed in th... | 01/17/2006 |
| 6586748 | Non-invasive water current measurement system and method A method and system are provided for measuring water current direction and magnitude. A plurality of beams of radiation are transmitted radially outward from a location above a body of water. Each beam is incident on the water's surface at an angle with r... | 07/01/2003 |
| 6356344 | Mixing apparatus and optical rangefinder using the same The invention particularly relates to a mixing apparatus using an eccentric phase plate, and an optical rangefinder using the mixing apparatus. In the optical rangefinder, an external distance measurement optical path leads light from the light source to ... | 03/12/2002 |
| 6343228 | Method and apparatus for fluorescence imaging of tissue Fluorescence imaging of tissue is used as a diagnostic tool in which geometric effects and specular reflections are compensated for by normalizing a fluorescence image with a cross-polarized image.... | 01/29/2002 |
| 5751408 | Surveying apparatus There is provided a surveying apparatus for detecting an object reflector (102) and measuring a distance from the object reflector (102) based on a luminous flux reflected by the object reflector (102) by irradiating a luminous flux toward the object refl... | 05/12/1998 |
| 5510890 | Laser radar with reference beam storage In a laser radar system, in which pulses from a laser are focused by a telescope onto a target, the back-scattered radiation being deflected by polarizing beam splitter onto a detector in conjunction with a reference beam, the reference beam being produce... | 04/23/1996 |
| 5285252 | Optical method and optical device for distance measurement and their application to the relative positioning of parts An optical method and optical device for distance measurement, comprising the steps of emitting an incident light beam (13) comprising at least two waves of differing wavelengths (λ1 and λ2); separating this beam into a reference beam (15) and a measure... | 02/08/1994 |
| 5253033 | Laser radar system with phased-array beam steerer An optical beam steering device for use in a single-aperture laser transceiver system provides deflection of the transmitted and received beams in two planes, while maintaining the distinctive identities of each channel respective to their polarizations. ... | 10/12/1993 |
| 4957362 | Method and apparatus for electro-optical phase detection The present invention detects the difference in phase between the modulation of a received optical beam and a reference RF signal or a second modulated optical beam. The received optical beam is modulated by the reference signal and by this reference sign... | 09/18/1990 |
| 4916324 | Method and apparatus for electro-optical distance measurement To simplify the reflectors for electro-optical distance measurement with a distance measuring apparatus with modulation of light outside of the light source, the optical bundle for distance measurement is focussed on to the target. Thereby, distance measu... | 04/10/1990 |
| 4786176 | Metrological apparatus and method using polarization modulation To measure distances, light from a flash tube is plane polarized by a polarizing filter, then polarization modulated by an electro-optical crystal, then passed along a `wobbling` light path, then subjected to a relative retardation of about a quarter wave... | 11/22/1988 |
| 4759623 | Electrooptical distance measuring apparatus For electrooptical measurement of distance with modulation of light external to the light source (1) a modulator system (5, 7, 8, 11) with low sensitivity to temperature and with a low modulating voltage is disclosed. The temperature dependence of the sta... | 07/26/1988 |
| 4530600 | Variable attenuator for optical transceiver A variable attenuator for optical transceivers such as laser rangefinders for ordnance control. A polarization rotation device, such as a mechanically rotatable half-wave plate or an electrooptic cell, operates in combination with a beam splitter polarize... | 07/23/1985 |
| 4025194 | Common aperture laser transmitter/receiver A common-optics laser transceiver has a common aperture for transmitting receiving a laser beam, and uses the resonator polarizer to separate the resonator beam from the receiver beam, resulting in a polarization sensitive, lightweight laser transmitter... | 05/24/1977 |
| 4011445 | Optical array active radar imaging technique An optical target imaging system having a laser transmitter that provides a dual pulse sequence target illuminating field. One pulse of the dual pulse field is predominantly polarized in one direction and the other pulse is predominantly orthogonally pola... | 03/08/1977 |
