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As the Laser disc format is not digitally encoded and does not make use of compression techniques, it is immune to video macroblocking ( most visible as blockiness during high motion sequences ) or contrast banding ( subtle visible lines in gradient areas, such as out-of-focus backgrounds, skies, or light casts from spotlights ) that can be caused by the MPEG-2 encoding process as video is prepared for DVD.
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Laser and disc
Laser welding is becoming more common as a method of attaching the drive plate to the disc ring with the laser typically being between 2-3KW and a feed rate 1m / minute.
In the late 1970s, Philips developed " Laser Disc " technology, producing an optically read, 12 inch disc that would contain recorded video material.
The point source has a wavelength of 633 nm ( e. g. He-Ne Laser ) and is located 1 m from the disc.
Laser rot was most troublesome to the Laserdisc format, but also occurs to some pressed commercial CDs, and was caused in both cases by inadequate disc manufacture.
It identifies the Laser Beam Recorder ( LBR ) signal processor or mold that produced a particular stamper or a glass master disc from which molds are produced.
Laser disc technology, using a transparent disc, was invented by David Paul Gregg and James Russell in 1958 ( and patented in 1961 and 1990 ).
Laserdisc was first available on the market, in Atlanta, on December 15, 1978, two years after the introduction of the VHS VCR, and four years before the introduction of the CD ( which is based on Laser disc technology ).
The first Laser disc title marketed in North America was the MCA DiscoVision release of Jaws in 1978.
It was estimated that in 1998, Laser disc players were in approximately 2 % of U. S. households ( roughly two million ).
Laser disc was released on June 10, 1981, and a total of 3. 6 million Laser disc players were sold in Japan.
A total of 16. 8 million Laser disc players were sold worldwide, of which 9. 5 million of them were sold by Pioneer.
By the early 2000s, Laser disc was completely replaced by DVD in the North American retail marketplace, as neither players nor software were now produced.
In Europe, Laser disc always remained an obscure format.
From 1991 up until the early 2000s, the BBC also used Laser disc technology to play out the channel idents.
The time-compressed CLV re-issue of Jaws no longer had the original soundtrack, having had incidental background music replaced for the video disc version due to licensing cost ( the music would not be available until the THX Laser Disc box set was released in 1995 ).
Laser disc was a composite video format: the luminance ( black and white ) and chrominance ( color ) information were transmitted in one signal, separated by the receiver.
The space-consuming analog video signal of a Laser disc limited playback duration to 30 minutes ( CAV ) or 60 minutes ( CLV ) per side because of the hardware manufacturer's refusal to reduce line count for increased playtime.
In addition, Laser disc video sometimes exhibit a problem known as “ crosstalk ”.
Another significant issue unique to Laser disc is one involving the inconsistency of playback quality between different makers and models of player.
In contrast, Laser disc playback quality is highly dependent on hardware quality.
Laser and format
Devo was also a pioneer of the music video, creating many memorable clips for the Laser Disc format, with " Whip It " getting heavy airplay in the early days of MTV.
* LKSoft took concepts from EDIF 2 0 0 to create a proprietary data format with the default extension ". cam " for their CircuitCAM system offered by LPKF Laser & Electronics AG.
* LSM ( Zeiss ) Laser Scanning Confocal Microscopy platform format form Carl Zeiss
The BBC published this work on Laser Discs in LVROM format, which can now be read only by a few machines, and there were fears that the data would become unreadable.
Initially licensed, sold, and marketed as MCA DiscoVision ( also known as simply " DiscoVision ") in North America in 1978, the technology was previously referred to internally as Optical Videodisc System, Reflective Optical Videodisc, Laser Optical Videodisc, and Disco-Vision ( with a dash ), with the first players referring to the format as " Video Long Play ".
Later, Pioneer Electronics purchased the majority stake in the format and marketed it as both LaserVision ( format name ) and LaserDisc ( brand name ) in 1980, with some releases unofficially referring to the medium as " Laser Videodisc ".
For the 1980 launch of the first Universal-Pioneer player, the VP-1000, the name became Laser Disc ( with a ' rainbow ' type logo joining the two words ); in 1981, the space was eliminated and the intercap " LaserDisc " became the final and common brand name for the format, although the official name was LaserVision ( as seen at the beginning of many LaserDisc releases just before the start of the film ).
By the end of Laser disc's run, DVDs were living up to their potential as a superior format.
Assuming the player's optical pickup is in proper working order, crosstalk distortion normally does not occur during playback of CAV format Laser discs, as the rotational speed never varies.
The International Laser Display Association developed an image format suitable for interchanging image data between laser controllers and laser fixtures.
Laser and is
Laser Doppler anemometers use a beam of light from a laser that is divided into two beams, with one propagated out of the anemometer.
Laser spectroscopy is used as a tool for studying phenomena with energy in the range of visible light, for example, to study non-linear optics and forbidden transitions in media.
* Cyan Wisp is an alien-like creature from Sonic Colors with an attack move called Cyan Laser.
General relativity also predicts the existence of gravitational waves, which have since been observed indirectly ; a direct measurement is the aim of projects such as LIGO and NASA / ESA Laser Interferometer Space Antenna and various pulsar timing arrays.
Laser science or laser physics is a branch of optics that describes the theory and practice of lasers.
Laser science is principally concerned with quantum electronics, laser construction, optical cavity design, the physics of producing a population inversion in laser media, and the temporal evolution of the light field in the laser.
Laser microscopy is a rapidly growing field that uses laser illumination sources in various forms of microscopy.
* Laser cladding – metallic powder is blown through a movable laser beam ( e. g. mounted on a NC 5-axis machine ).
The current laser at the UK Atomic Weapons Establishment ( AWE ), the HELEN ( High Energy Laser Embodying Neodymium ) 1-terawatt neodymium-glass laser, can access the midpoints of pressure and temperature regions and is used to acquire data for modeling on how density, temperature and pressure interact inside warheads.
The most current estimate from Lunar Laser Ranging for the acceleration is ( see Chapront et alii 2002 ): (− 25. 858 ± 0. 003 )"/ cy < sup > 2 </ sup >.
* < span style =" color :# f00 ;"> Red-Counter-air Laser </ span >-at full power, this is a powerful, horizontal double transverse wave.
The technology was also used to develop the Tactical High Energy Laser, ( THEL ) which is being tested to shoot down artillery shells.
For example, one does not buy " Laser Vision ", but the effect " Energy Blast ", and specifies that it is a laser emitted by the hero's eyes.
Rochester's Laboratory for Laser Energetics is home to the second most powerful fusion laser in the world.
** The first LAGEOS ( Laser Geodynamics Satellite ) is launched.
At CERN, this device is called the Resonance Ionization Laser Ion Source ( RILIS ).
Laser lithotripsy is another technique, which involves the use of a holmium: yttrium aluminium garnet ( Ho: YAG ) laser to fragment stones in the bladder, ureters and kidneys.
* Titan Laser: Titan is a combined nanosecond-long pulse and ultrashort-pulse ( subpicosecond ) laser, with hundreds of joules of energy in each beam.
Laser beam quality is quantified by the beam parameter product ( BPP ).
Speckle is considered to be a problem in laser based display systems like the Laser TV.
Laser printing is a digital printing process that rapidly produces high quality text and graphics on plain paper.
It is closely involved in major international projects such as the European X-Ray Free-Electron Laser, the Large Hadron Collider in Geneva, the IceCube Neutrino Observatory at the South Pole and the International Linear Collider.
However, this approach made a comeback following further innovations, and is being developed at both the United States National Ignition Facility, the French Laser Mégajoule as well as the planned European Union High Power laser Energy Research ( HiPER ) facility.
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