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  2. Optical cross section - Wikipedia

    en.wikipedia.org/wiki/Optical_cross_section

    Optical cross section (OCS) is a value which describes the maximum amount of optical flux reflected back to the source. [1] The standard unit of measurement is m 2 /sr. OCS is dependent on the geometry and the reflectivity at a particular wavelength of an object.

  3. Lidar - Wikipedia

    en.wikipedia.org/wiki/Lidar

    Lidar (/ ˈ l aɪ d ɑːr /, also LIDAR, LiDAR or LADAR, an acronym of "light detection and ranging" [1] or "laser imaging, detection, and ranging" [2]) is a method for determining ranges by targeting an object or a surface with a laser and measuring the time for the reflected light to return to the receiver.

  4. Geological structure measurement by LiDAR - Wikipedia

    en.wikipedia.org/wiki/Geological_structure...

    Geological structure measurement by LiDAR technology is a remote sensing method applied in structural geology. It enables monitoring and characterisation of rock bodies. [ 1 ] This method's typical use is to acquire high resolution structural and deformational data for identifying geological hazards risk, such as assessing rockfall risks or ...

  5. How Automakers Use Lidar to Map for Hands-Free Driving - AOL

    www.aol.com/automakers-lidar-map-hands-free...

    The lidar sensor is accompanied by a pair of cameras—one facing the front and the other aimed rearward—that snap a frame every few seconds to provide human and computer annotators with some ...

  6. Atmospheric lidar - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_lidar

    Atmospheric lidar is a class of instruments that uses laser light to study atmospheric ... and predicting the lidar signal is a straightforward calculation, the ...

  7. Laser diffraction analysis - Wikipedia

    en.wikipedia.org/wiki/Laser_diffraction_analysis

    Laser diffraction analyzer. Laser diffraction analysis, also known as laser diffraction spectroscopy, is a technology that utilizes diffraction patterns of a laser beam passed through any object ranging from nanometers to millimeters in size [1] to quickly measure geometrical dimensions of a particle.

  8. Diffraction-limited system - Wikipedia

    en.wikipedia.org/wiki/Diffraction-limited_system

    Memorial in Jena, Germany to Ernst Karl Abbe, who approximated the diffraction limit of a microscope as = ⁡, where d is the resolvable feature size, λ is the wavelength of light, n is the index of refraction of the medium being imaged in, and θ (depicted as α in the inscription) is the half-angle subtended by the optical objective lens (representing the numerical aperture).

  9. Here's Why Urban Outfitters Stock Soared Today - AOL

    www.aol.com/heres-why-urban-outfitters-stock...

    Shares of apparel retailer Urban Outfitters (NASDAQ: URBN) soared on Wednesday after the company reported financial results for its fiscal third quarter of 2025. As of 11:30 a.m. ET, Urban ...