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Class Information
Number: 356/5.09
Name: Optics: measuring and testing > Range or remote distance finding > With photodetection > Of frequency difference
Description: Subject matter that either sends a defined frequency beam or frequency modulates an outgoing pulse or continuous wave optical beam in order to compare the detected return frequency to the transmitted frequency for determining range calibrated frequency differences.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8705013 Diffractive optical element, distance measuring apparatus and distance measuring method Apr. 22, 2014
8687173 Compact fiber optic geometry for a counter chirp FMCW coherent laser radar Apr. 1, 2014
8687174 Unit pixel, photo-detection device and method of measuring a distance using the same Apr. 1, 2014
8643827 Method for measuring the propagation time of light Feb. 4, 2014
8629977 Traffic scanning LIDAR Jan. 14, 2014
8605262 Time shifted PN codes for CW LiDAR, radar, and sonar Dec. 10, 2013
8599365 System and method for identifying individual trees in LiDAR data using local view Dec. 3, 2013
8570494 Electro-optical distance meter Oct. 29, 2013
8537341 Physical quantity sensor and physical quantity measuring method Sep. 17, 2013
8471705 Method and apparatus for detecting presence of a target object via continuous laser and range of the target object via laser pulse Jun. 25, 2013
8451433 Range-finding method and apparatus May. 28, 2013
8411258 Systems and methods for determining position using light sources Apr. 2, 2013
8305563 Electro-optical distance-measuring unit Nov. 6, 2012
8174682 Shape measuring instrument with light source control May. 8, 2012
8174683 Vehicle positioning measurement system and method May. 8, 2012
8164078 Beam irradiation device Apr. 24, 2012
8081301 LADAR transmitting and receiving system and method Dec. 20, 2011
7986397 FMCW 3-D LADAR imaging systems and methods with reduced Doppler sensitivity Jul. 26, 2011
7982660 Measuring device for a motor vehicle Jul. 19, 2011
7920249 Device and method for measuring relative movement Apr. 5, 2011
7869006 Laser measuring device Jan. 11, 2011
7831358 Arrangement and method for obtaining information using phase difference of modulated illumination Nov. 9, 2010
7783612 Creation of optimized terrain databases Aug. 24, 2010
7742152 Coherent detection scheme for FM chirped laser radar Jun. 22, 2010
7724355 Method and device for enhancing accuracy in ultrasonic range measurement May. 25, 2010
7714990 Hand-held laser distance measuring device with a pulse reflection mixing method May. 11, 2010
7671971 Electro-optical method for measuring distance and detecting a non-ideal chirp profile Mar. 2, 2010
7667598 Method and apparatus for detecting presence and range of a target object using a common detector Feb. 23, 2010
7645974 Method and apparatus for distance measurement Jan. 12, 2010
7623222 Single-channel heterodyne distance-measuring method Nov. 24, 2009
7495822 Frequency shifter in an optical path containing a continuous laser source Feb. 24, 2009
7420656 Scannerless loss modulated flash color range imaging Sep. 2, 2008
7414705 Method and system for range measurement Aug. 19, 2008
7391505 Range sensing system Jun. 24, 2008
7336346 Distance measuring device and method thereof Feb. 26, 2008
7282374 Method and apparatus for comparing device and non-device structures Oct. 16, 2007
7230711 Envelope functions for modulation spectroscopy Jun. 12, 2007
7180580 Passive distance measurement using spectral phase gradients Feb. 20, 2007
7177014 Light wave distance measuring apparatus Feb. 13, 2007
7075626 Laser distance measuring device Jul. 11, 2006
7061592 System and method for measuring velocity using frequency modulation of laser output Jun. 13, 2006
6940599 Envelope functions for modulation spectroscopy Sep. 6, 2005
6894767 Light wave distance-measuring system May. 17, 2005
6885438 System and method for measuring velocity using frequency modulation of laser output Apr. 26, 2005
6876441 Optical sensor for distance measurement Apr. 5, 2005
6875978 Modelocked waveform for synthetic aperture ladar Apr. 5, 2005
6844924 Ladar system for detecting objects Jan. 18, 2005
6801875 Methods, systems, and software for performing measurements Oct. 5, 2004
6765654 Coherent laser radar device Jul. 20, 2004
6727985 System and method for signal acquisition in a distance meter Apr. 27, 2004

1 2 3 4

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