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	Ring laser gyroscope - Wikipedia, the free encyclopedia
		A ring laser gyroscope uses interference of laser light within a bulk optic ring to detect changes in orientation and spin.
		Ring laser gyros (RLG) can be used as the stable elements (for one degree of freedom each) in an inertial reference system.
		Physically, an RLG is composed of segments of transmission paths configured as either a square or a triangle and connected with mirrors.
	www.wikipedia.org /wiki/Ring_laser_gyroscope (583 words)

	Method for anodically bonding an electrode to a ring laser gyro block - US Patent 6072580 (Site not responding. Last check: 2007-10-16)
		A thin ring of sealing material is positioned between an excitation electrode and a laser block of the ring laser gyro, and the sealing material is compressed.
		The method for manufacturing a ring laser angular rate sensor of claim 9, wherein at least about 450 volts of electrical potential is applied across the excitation electrodes and the laser block for a predetermined amount of time and at a predetermined ambient temperature.
		Ring laser gyro 10 includes a laser block 14 having an optical closed loop pathway filled with a lasing gas that is adapted to be electrically charged.
	www.patentstorm.us /patents/6072580.html (4287 words)

	Laser gyro high voltage start module and high voltage pulse generator US Patent 5299211 (Site not responding. Last check: 2007-10-16)
		Ring laser angular rate sensors, often referred to as ring laser gyros, are well known.
		Ring laser gyro 10 includes a controller 100, a ring laser gyro block 200, an active current control 300, dither pickoff amplifier 400, direct digital dither drive 500, a path length control (PLC) device 600, a readout 700, and digital logic 800.
		For example, a dual ring laser gyro system may be constructed using the present invention wherein the active current is supplied to the cathodes instead of the anodes of a ring laser gyro.
	patents.nimblewisdom.com /patent/5299211-Laser-gyro-high-voltage-start-module-and-high-voltage-pulse-generator (6633 words)

	114
		For those who are not familiar with the laser ring gyro, it is basically an enclosed structure with a number of mirrors which reflect the laser in a closed path of 360 degrees (which is why it is often referred to as a "ring").
		The laser ring gyro has become increasingly popular with the the aerospace industry and the military over the last two decades with the use of high speed jets and spacecraft and there are dozens of patents on it over the last two decades.
		The laser ring gyro assumes the based upon the speed of light being constant (though not an essential component as it mainly uses light frequency variation) but the light clock uses the new concept that the speed of light is not constant for a distant observer in a different frame of reference.
	www.journaloftheoretics.com /Comments/1-2/114.htm (526 words)

	Ring Laser Gyro - Honeywell Defense and Space Electronic Systems (Site not responding. Last check: 2007-10-16)
		The ring laser gyro was developed in the 60s and 70s for commercial, space and military guidance, navigation and control systems.
		Honeywell’s gyros are acknowledged as the highest reliability gyros in the industry.
		Honeywell is a leading producer of ring laser gyro products for a number of aerospace, land vehicle, marine and space applications.
	content.honeywell.com /dses/products/gyros/default.htm (206 words)

	armada international: 1/00-002 (Full Article)
		Development of ring laser angular rate sensors (usually referred to as ring laser gyros, although they lack the traditional rotating mass of the mechanical gyroscope) started in the mid?1960s, when the technology was seen as a potentially more reliable replacement for the mechanical gyroscope.
		The gyros in a gimballed system had to measure rotations ranging from a few thousandths of a degree per hour to a few tens of degrees per hour, but those in a strap-down system would have to cope with the highest rotation rates possible within the full manoeuvring envelope of the aircraft.
		Any rotation of the gyro about an axis perpendicular to the plane of the conduit causes a shift in the relative phase between the two waves due to the Sagnac effect, and this shift is proportional to the magnitude and sense of direction of the rotation.
	www.armada.ch /00-1/002.htm (3529 words)

	Ring Laser Gyro (Site not responding. Last check: 2007-10-16)
		The Ring Laser Gyros (RLG) can be used as the stable elements (for one degree of freedom each) in an inertial guidance system.
		The input laser beam is split into two beams that travel the same path but in opposite directions: one clockwise and the other counter-clockwise.
		The beams are recombined and sent to the output detector.
	www.fas.org /man/dod-101/navy/docs/fun/rlg.htm (562 words)

	Patents Results
		A dynamically tuned gyro is disclosed in which a gyro rotor is mounted on an rotor shaft of a spin motor through..
		The acceleration-detecting type gyro apparatus includes: a gyro case; a gyro rotor which is supported within the gyro case by..
		...of a timer whether the moving body is at a stopping condition and wherein a zero point of the gyro in corrected with an average value of outputs of the gyro at the time the moving body is..
	www.designinfo.com /Engineering-search/Patents/gyro?clickSrc=PTID (287 words)

	Flying Magazine: Finally, a PFD for Pistons.
		The gold standard in AHRS is the ring laser gyro perfected by Honeywell and used in virtually all airline and larger business jets.
		We would all fly with ring laser gyros if precision and ultimate reliability were the only goal, but the gyro system cost is about the same as the cost for the entire SR22.
		The key, as in the ring laser gyro, is being able to reliably and precisely detect the smallest movements in all directions.
	www.flyingmag.com /article.asp?section_id=17&article_id=276&page_number=2&preview= (468 words)

	Rate Gyro's
		A rate gyro refers to a gyro that puts out some sort of signal that is proportional to its rotational velocity.
		Most of the time, when someone refers to a solid-state gyro they mean a piezoelectric one as they are by far the least expensive and most common piezoelectric gyro is a small silicon or quartz "tuning fork" that deforms due to the coriolis force when it is rotated.
		Because piezoelectric gyro’s measure rotation via a vibrating tuning fork, they are susceptible to picking up noise due to external vibration and resonant coupling of the tuning forks.
	fastascent.com /Projects/Attitude_Control/Rate_Gyro_s/rate_gyro_s.html (430 words)

	Ring laser gyroscope - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-10-16)
		Technology assessment of ring laser gyroscopes (GACIAC TA-79-01)
		RL-34 ring laser gyro laboratory evaluation for the deep space network antenna application final report (SuDoc NAS 1.26:190481)
		Ultimate ocean depth packaging for a digital ring laser gyroscope (WHOI)
	encyclopedia.worldsearch.com /ring_laser_gyro.htm (449 words)

	Maritime Global Net
		Sperry Marine is a world leader in ring laser gyro technology, having supplied more than 80 percent of the RLG systems at sea today.
		The AN/WSN-7 RLG navigator is standard equipment throughout the U.S. Navy surface and submarine fleets, and the exportable MK39 RLG system has been selected by more than 22 international navies for a variety of ship platforms.
		The new-generation ring laser gyro systems are part of a major upgrade program for the Canadian destroyers.
	www.mglobal.com /news/newsreleasedetails.cfm?id=2892&type=0 (322 words)

	Pilot Guide - Crossbow, Smarter Sensors in Silicon (Site not responding. Last check: 2007-10-16)
		While mechanical gyros have been used in aircraft for many years, there are a number of problems that make mechanical gyros less than ideal, and have driven the need for more accurate and reliable instruments.
		Strapping three ring laser gyros together on the X,Y, and Z axes of an airplane, and doing some math, allows for the continuous calculation of a level reference and the change in roll, pitch and heading.
		The ring laser gyro systems, with their simple “strapdown” construction that uses no spinning wheels or gimbals, replaced the mechanical gyro systems in most military and commercial aircraft.
	www.xbow.com /General_info/gyro_guide.htm (1752 words)

	Sam's Laser FAQ - Laser Instruments and Applications
		If a laser beam is scanned across a 3-D object, and the spot is viewed (by optical sensors) from two different locations, it is possible to determine the instantaneous distance to the spot (on the object).
		Laser Atlanta Optics is an example of a company that specializes in laser based distance and speed measureing technology.
		The laser produces a coherent monochromatic beam which is expanded and collimated by a pair of positive lenses (not shown).
	www.kellerstudio.de /repairfaq/sam/laserlia.htm (20415 words)

	Ring Laser Gyro Product Family - Honeywell Defense and Space Electronic Systems (Site not responding. Last check: 2007-10-16)
		The ring laser gyro family consists of the GG1320AN and the GG1320AN01 ring laser gyros.
		These gyros have a performance level that is consistent with high-performance guidance and navigation requirements.
		The GG1320AN is a digital gyro that only requires a low voltage input power and provides a serial data output from an embedded microprocessor.
	content.honeywell.com /dses/products/gyros/rlg-gyros.htm (180 words)

	Flying Magazine: Low-Cost Solid State Gyro Approved (Site not responding. Last check: 2007-10-16)
		MEMS gyros are used mostly in the automotive industry to measure body tilt and skid to operate handling and traction control systems.
		Raw output from a MEMS gyro drifts many degrees per minute, so if you tried to use the device in an airplane the gyro would show you inverted, or through the first roll after just a few minutes of level flight.
		The low-cost system couldn’t quite match the precision of the laser, but it is within a degree or two under various maneuvers and is better than the spinning rotor gyros that piston airplane pilots now rely on.
	www.flyingmag.com /article.asp?print_page=y§ion_id=17&article_id=265&page_number=1&preview= (655 words)

	[No title]
		Laser Applications by JM Applications of lasers in measurement Measurement of velocity: Laser Doppler anemometry, single and dual-beam techniques, fringe interpretation.
		Explain the principles and describe and identify the applicability of laser Doppler velocimetry, distinguishing between the single and dual-beam methods, and derive the appropriate equations from both the Doppler and the fringe-pattern viewpoints.
		Describe both qualitatively and quantitatively the propagation of gaussian laser beams and their focusing, and calculate, from basic principles, what laser power is needed to cut and ablate in various applications.
	www.rdg.ac.uk /UnivRead/vr/FacSci/Units2002/3pha4.doc (812 words)

	Ring laser gyro - Information
		Looking For ring laser gyro - Find ring laser gyro and more at Lycos Search.
		Find ring laser gyro - Your relevant result is a click away!
		See the original editable 'Ring laser gyro' article.
	www.logicjungle.com /wiki/Ring_laser_gyro (624 words)

	Laser Gyro To Monitor Rotation of the Earth - February, 1997 (Site not responding. Last check: 2007-10-16)
		The gyro's rotational resolution of 1:10,000,000 over long time spans allows highly accurate detection of fluctuations in the Earth's rotation -- an attribute of particular interest to geophysicists seeking a better understanding of the Earth's interior structure.
		The laser approach exploits the fact that typical seismographs measure only linear seismic shocks, whereas a ring-laser gyro indicates the different rotational components of the seismic shocks.
		The ring-laser gyro's body consists of a 1.2 3 1.2-m block of Zerodur 180 mm thick and weighing approximately 600 kg.
	www.photonics.com /spectra/tech/XQ/ASP/techid.53/QX/read.htm (308 words)

	Ring laser gyroscope - Information
		Looking For ring laser gyroscope - Find ring laser gyroscope and more at Lycos Search.
		Find ring laser gyroscope - Your relevant result is a click away!
		See the original editable 'Ring laser gyroscope' article.
	www.logicjungle.com /wiki/Ring_laser_gyroscope (624 words)

	UNM 5,363,192 (Site not responding. Last check: 2007-10-16)
		A ring laser gyro that minimizes and avoids the effects of lock-in and backscatter.
		A ring laser is pumped in a lasing cavity with a mode-locked laser.
		The advantages of a mode-locked laser gyro over a conventional CW laser gyro include smaller size and lower cost due to the ability to use integrated optoelectronics.
	www.unm.edu /~scitech/5363192.html (176 words)

	Racal Instruments
		This ATE was designed to test ring laser gyro assemblies.
		An RF generator was utilized to maintain the laser beam amplitude at a predetermined amplitude.
		The test station produced rotation effects and evaluated the gyro output to determine gyro accuracy.
	www.racalinst.com /ate_sys/lasergyro.htm (67 words)

	ECE Alumni News - Winter 2002-03 - Killpatrick: A pioneer in developing the ring laser gyroscope
		Killpatrick pioneered major developments in the ring laser gyroscope, an inertial navigation device that helps guide, steer, and stabilize the airplane.
		Killpatrick and his fellow Honeywell team members formulated and patented a new design for the laser gyro, resulting in a self-contained, inertial sensing device that turned out to be very reliable.
		Nearly 40 of those years were concentrated on the laser gyro and three fourths of Killpatrick's 44 patents have to do with the laser gyro development.
	www.ece.uiuc.edu /alumni/w02-03/killpatrick.html (736 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		This is pretty easy: amplify the output from a small photocell and apply it to loudspeakers, shine the laser at the photocell, then turn the photocell so the reflected beam goes back into the laser.
		You will hear loud squeals and chirps (they sound much like the sounds of tuning a shortware radio past certain CW stations.) This occurs because the distance between the laser and the photocell is changing, and as it changes it causes a linear interference pattern to move along the laser beam.
		Shine the laser on the end of a pair of single fiber optical fibers each a couple of feet long.
	www.amasci.com /amateur/ringlas.txt (748 words)

	MSN Encarta - Search Results - laser ring gyro
		MSN Encarta - Search Results - laser ring gyro
		Ring, circular band used to decorate ears, toes, noses, or, most often, fingers.
		The finger ring has traditionally been worn for a number of reasons....
	encarta.msn.com /laser+ring+gyro.html (118 words)

	Avionics Gyro Laser Ring Thales (Site not responding. Last check: 2007-10-16)
		LASER - 8Z - Caracas - Venezuela - Mr Inocencio Alvarez, Chairman -
		Gyro “Honeywell led with the ring-laser gyro and we are now increasing our capacity...
		SAGEM has the ring laser gyro and other GIFAS companies have the SNECMA engines for India including avionics and...
	www.theoffshoredirectory.com /thales-2/avionics-gyro-laser-ring-thales.html (265 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		The stakes are formidable mainly because the market for ring laser gyros has mushroomed to more than $1 billion in the quarter century since they first reached the market.
		Further beclouding the picture as of late September was a barrage of additional legal maneuvers and motions on both sides, including an attack on the validity of the Litton patent by Honeywell.
		Yet to be adjudicated is a claim by Litton that Honeywell has violated antitrust laws by allegedly trying to monopolize ring laser gyro markets, and counterclaims by Honeywell charging Litton with attempting to monopolize inertial laser guidance markets.
	www.ibiblio.org /patents/txt/101193.txt (220 words)

	Ring Laser Gyro - Tutorial - Development Library - National Instruments
		A ring-laser gyro contains a ring-shaped cavity (the original design) or triangular-shaped cavity with circulating light beams generated by a laser.
		The frequency difference between the two circulating beams is a function of the attitude rate that acts perpendicularly to the plane of the moving beams.
		This difference in frequencies is sensed by a photodetector using an interferometric technique.
	zone.ni.com /devzone/conceptd.nsf/webmain/A1FE2A813A90FF1F86256855005C5729 (126 words)

	Ring laser gyroscope (Site not responding. Last check: 2007-10-16)
		Unlike a mechanical gyroscope the device does not resist changes its orientation (or at least these effects extremely tiny because photons are so light).
		Primary applications include navigation systems on commercial ships and spacecraft where Ring Laser gyroscopes often referred to as Inertial Reference System.
		As an avid boxing fan, I bought The Ring Special out of curiosity, and wound up carrying the magazine around with me for a few days, reading everything I could in my spare time.
	www.freeglossary.com /Laser_gyroscope (232 words)

	Northrop Grumman Navigation Systems Division (Site not responding. Last check: 2007-10-16)
		The LTN-92 allows classic aircraft like the L1011, DC-10 and B-747 to meet RNP 10 requirements now, with a growth path to full CNS/ATM compliance.
		The LTN-92 is the world's leading laser gyro replacement for the mechanical gyro systems found on older commercial aircraft and on many military transport and special application aircraft, offering over five times the reliabilty of these older systems.
		Approximately 2000 LTN-92s are in use on aircraft throughout the world.
	www.ngnavsys.com /Html/LTN-92 (150 words)

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