Array Optics What is a transient thermoelastic expansion ?
Well, I have to explain how this biomedical device works: Laser Opto-Acoustic.
Opto-acoustic imaging technology combines optics and acoustics with a goal of improving the accuracy of the cancer diagnosis without the use of ionizing radiation (x-ray). The process starts by illuminating the tissue with laser light of specific wavelengths. Tumors preferentially absorb the light over normal tissue and become slightly heated. A transient thermoelastic expansion causes a tumor to emit a pressure (acoustic) wave. This acoustic wave is then detected by an array of sensors positioned around the periphery of the area of study.
Ok, I understand everything except the tissue-light interaction that cause the acoustic wave to be emitted. The tissue absorbs the laser light, which is energy. It heats, therefore it expands. Now, why does the energy is emited by acoustic waves ? Why not light ?
Can you help me ? Thank you so much.
email me on transformed.jp@gmail.com i'd love to help looking forward to ur email
Have a nice day
How to produce multiple image using optics or mirrors?
I need to know how to produce multiple image (in an array) in one screen using a projector. I am assuming multiples mirrors and optics lenses could be used but how I can project 9 image of the same picture in an array form (3 columns and 3 rows) and very close each other.
The easiest way it to do this electronically. Create 9 identical images at the object plane of your projector.
Chad Hene Michigan Wolverines Signed Photo - 16x20 Chad Hene Michigan Wolverines Signed Photo - 16x20 As demand for memorabilia like this increases, pieces like this will go up in value. Sportsmemorabilia.com takes pride in our inventory, and every piece we sell has been evaluated for quality and authenticity. Each limited edition piece comes with a numbered hologram from Sportsmemorabilia.com. You can't beat these stats, which is why his memorabilia is always popular. Superb signature quality. This is a Sportsmemorabilia.com exclusive and can't be found anywhere else. Everything we sell on Sportsmemorabilia.com is 100% authentic and comes with of COA and a money-back gaurantee. This certified piece comes from a rare official signing session with this athlete.
Optics Parts Looking for the normal dust cover for my AK-47?
And yes, I have been looking online for hours.
The one that came with it is designed for attaching scopes and other optics. You can still look under the mount and use the sights but I hate looking through a narrow tube to shoot something 100 yards away.
Maybe I have the name of the part wrong, because I have been looking online for hours and the only ones available are similar to mine.
Found one in about 30 seconds at akparts.com for $12.95.
(AMDPT4) AK-47 Receiver Cover
Fits all AK-47 Receiver cover used in good condition. From Hungarian AMD-65 and Romanian AK-47 rifles.
Optics question - Focal length dealing with the eye?
What is the focal length of the eye lens system when viewing an object (a) at infinity and (b) 30 cm from the eye? Assume the lens-retina distance is 2.0cm
I assume I have to use the eq. 1/f = -1/do + 1/di , but am confused with part (a)
just take the object distance as infinity...then 1/infinity =0; then 1/f =1/v u have the value of v. calculate f
OE like Ultralase and Optimax are large commercial ventures - get as many patients in as possible, get them treated and get them out again - you are a number to be converted for KPI purposes. Have you been ''Upgraded'' from the £395 per eye treatment to Wavefront and upgraded further to Intralase? They charge alot for laser treatment with fairly average levels of patient care.
HighlightsReplacement optical laser pick-up part for Nintendo WiiFixes long loading times and read disc errorsSave on expensive repairs with the replacement optical laser pick-up part for the Nintendo WiiMade from high quality componentsNote:The replacement optical laser pick-up part should only be installed by trained technicians. Improper installation of may result in permanent damage to the Nintendo Wii console and game discs. Please note that MiniInTheBox cannot be held responsible for any damage that occurs from improper installation of console components. MiniInTheBox staff will not dispense instructions or advice about the installation of console components.
HighlightsReplaces your old optical laser pick-up for your Xbox 360Improves disc loading and reading timesHigh quality replacement part for your Xbox 360
Optical Interactions in Solids presents an extensive and unified treatment of the basic principles of the optical properties of solids. It provides a theoretical background to workers in the field of laser physics and absorption and fluorescence spectrosc
Nonlinear optical techniques are now recognized as the most efficient means available to generate laser radiation at wavelengths that are presently inaccessible via conventional sources. This technology uses nonlinear optical crystals for the frequency co
This book constitutes the thoroughly refereed post-conference proceedings of the Third International Workshop on Optical SuperComputing, OSC 2010, held in Bertinoro, Italy, in November 2010.The 13 papers presented were carefully reviewed and selected for inclusion in this book. Being an annual forum for research presentations on all facets of optical computing for solving hard computation tasks, OCS addresses the following topics of interest: designs or demonstrations of optical computing devices, algorithmics and complexity issues of optical computing, computation representation by photons and holograms, neural and brain inspired architectures, electro-optic devices for interacting with optical computing devices, practical implementations, analysis of existing devices and case studies, optical photonics and laser switching technologies, optical and photonic memories, optical signal processing subsystems, optical networks for high-performance computing, optical interconnections, quantum optical systems, applications and algorithms for optical devices, Alpha particles, X-rays, and nano-technologies for optical computing.
6 strips 8 x 0.2 (20 cm x 0.5 cm). Self adhesive. High reflectivity. Specially made for use with optical and laser tachometers and counters. Wide angle reflectivity material. High performance adhesive backing.
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X-men Effect - Cyclops Laser Optical Blast
Difference between optical/laser mouse pad and regular?
I see a lot of mousepads being advertised as optical or laser mouse pads. What makes these any different than traditional mouse pads?
An optical mouse pad would need to not have a reflective surface. Reflective surfaces or complex patterns can cause fits for optical mice.
Optic Wire is a fiber optic internet speed affected by the wiring of your house?
Also can anyone confirm if they connect the fiber optic wire directly to the modem and does switching to a new service in Chicago grant you free / reduced fee re wiring of your house? Also when is it planned to finally have fiber optics up and running in Chicago?
You get a router that connects to the fiber (not a modem) that has internet connections via 100 MHz ethernet (wire) or via WiFi (radio).
If your question "wiring" means AC power wires, the answer is NO. If you mean ethernet wires, and that is how you plan to connect to the router, then YES, the ethernet wiring must meet the CAT5 standards.
FEATURES: Optic cut slides accommodate Dr Optic Burris JPoint and RMR Optics Also available as an iron sight ready model Stainless steel slide with Zev Technology black DLC coating Precicision CNC aircraft grade 1704 heat treated stainless steel RC44-46 Precision wire EDM'd breech face and firing pin hole Front and rear cocking serrations Lowered ejection port Light weight For the Glock 17 Porting above front slide serrations Includes firing pin channel liner BENEFITS: Optic cut allows for the user to easily mount their red dot sight Low optic cut ensures the lowest possible profile No need to send in Mfg: Glockworx
FEATURES: Optic cut slides accommodate Dr Optic Burris JPoint and RMR Optics Also available as an iron sight ready model Stainless steel slide with Zev Technology black DLC coating Precicision CNC aircraft grade 1704 heat treated stainless steel RC44-46 Precision wire EDM'd breech face and firing pin hole Front and rear cocking serrations Lowered ejection port Light weight For the Glock 17 Porting above front slide serrations Includes firing pin channel liner BENEFITS: Optic cut allows for the user to easily mount their red dot sight Low optic cut ensures the lowest possible profile No need to send in Mfg: Glockworx
Zappos.com is proud to offer the Spy Optic - Murena (Burgundy/Grey Lens) - Eyewear: Grounded in the big style and big hair of the '80s, the Murena from Spy Optic is a must-have for today's scene. ; Handcrafted from luxurious acetate. ; Durable three-barrel metal hinges. ; Acetate temples with wire-core center. ; Custom metal details on side temples. ; Crystal clear six-base CR39 lenses. ; Offers 100% UV protection from the sun's harmful rays. ; Dimensions: Frame Width: 140mm Lens: 42mm high x 55mm wide Bridge: 15mm Temple Length: 134mm
The ATN PS22-3P is an attachment for a daytime rifle scopes with 1x-6x (2.5x-4x are optimal) magnification. Converts scope into a high-quality, very accurate night vision weapon sight.System mounts in front of a daytime scopeRe-zeroing of the scope is not requiredComes standard with 7/8-inch weaver mountAdapter for ARMS quick release mountOptional Ring Adapters allows mounting of the unit onto the objective of the daytime scope (25...62mm diameter)IR Illuminator can be mounted onto the optional Picatinny RailUtilizes a 2nd + Gen. or 3rd GenImage Intensifier TubeIngenious setup allows the shooter to go from day to night in less then 30 seconds without tools, without changes in eye relief and remain zeroed all around the clockContains an Image Intensifier Tube assembly with an integrated high-voltage power source and the three volt battery housingIntensifier Tube 3PLens of system F1:1.23, 80mmMagnification 1x, FOV 12 degrees Resolution 64-72 lp/mmRange of focus 10m to infinityDirect controlsInfrared illuminator 450mW detachableBattery life 60 hoursPower supply (1) 3v lithium (CR123A)Storage temperature -50 C to +70 COperating temperature -40 C to +50 CWaterproofTactical control wire Dimensions 5.5 inches long x 3.2 inches wide x 2.8 inches deep
The ATN PS40-3 gives your daytime scope night vision capability in a matter of seconds. The ATN PS40-3 mounts in front of a daytime scope to enable nighttime operation. No shift of impact, no need to re-zero or change of eye relief occursUses the latest in image intensifier tube technology for outstanding resolution and performancePrecision optical alignment is essential for a front sight system to work properlyIndividually tested and aligned on an optical scale by our engineers to provide perfect alignmentCompact and lightweight at only 840 gramsIntensifier Tube 3Lens of system F1:1.23, 80mmMagnification 1xResolution 64 lp/mm, FOV 12 degreesDirect controls Range of focus 10m to infinityInfra-red illuminator 450mW detachablePower supply one (1) 3v lithium (CR123A)Operating temperature -40 C to +50 CStorage temperature -50 C to +70 CWeather resistantTactical control wireDimensions 6.9 inches x 3.3 inches x 3.2 inchesWeight 1.85 pounds
The ATN PS40-HPT gives your daytime scope night vision capability in a matter of seconds. This adapter mounts in front of a daytime scope to enable nighttime operation. No shift of impact, no need to re-zero or change of eye relief occursUses the latest in image intensifier tube technology for outstanding resolution and performancePrecision optical alignment is essential for a front sight system to work properlyIndividually tested and aligned on an optical scale by our engineers to provide perfect alignmentCompact and lightweight at only 840 gramsIntensifier Tube HPTLens of system F1:1.23, 80mmMagnification 1xResolution 55-72 lp/mm, FOV 12 degreesDirect controlsRange of focus 10m to infinityInfra-red illuminator 450mW detachablePower supply one (1) 3v lithium (CR123A)Operating temperature -40 C to +50 CStorage temperature -50 C to +70 CWeather resistantTactical control wireDimensions 6.9 inches x 3.3 inches x 3.2 inchesWeight 1.85 pounds
do electrons moving through a solid, ie copper wire travel at the speed of light?
its been many years since I took a physics class. also (stupid question) is the light moving through a fiber optic cable traveling as fast as light through air or a vacum?
whats a good source to study the math for these questions?
Its easy, but wrong to think of electrons as flowing like water in a pipe through a conductor. When there is no external 'electromotive force' (voltage) applied, all the electrons jump around randomly between atoms. The way electrons are, it is difficult to say 'how fast' they are travelling when they do this, due to quantum mechanical reasons (they dont so much as 'fly' from atom to atom, but sort of disapear from one place and appear in the other!). When you apply a voltage to create a current, very little is different. If you were watching the electrons when you applied a voltage, you'd not even notice anything different. What does happen though is that the 'average' path that the electrons take is ever so slightly altered to be in the direction of the voltage. like this http://www.physics.sjsu.edu/becker/physics51/images/26_23_Random_electron_motion_in_metal.JPG l You can measure the average 'drift' velocity, which is like the average 'flow' of electrons, and it usually is about a few mm per minute (or second, i cant quite remember, but its quite slow). Of course in AC current, the net 'flow' of electrons is 0! What does travel at the speed of light though is the 'electromagnetic wave' that is transmitted down the wire(s). It is this that carries the power and information. Light (and indeed all electromagnetic waves) travel at a speed that depends on the electrical and magnetic properties of the material in question. It is slightly slower in air than in a vacuum, and may be faster or slower for other materials (like optical fibres). But for nearly all purposes, its usually quite close to 'c' which is the speed of light in a vacuum. (But for something like a pair of copper wires, it might be significantly slower, like 60% the speed of light. It all depends on the magnetic permeability and the electric permitivity of the medium, which basically describe how well the substance is able to be magnetised, and electrically 'polarized' respectively)
The mathematics required depends on how 'deep' you want to go. Initially basic algebra and analysis are all that is needed. If you want to go further, though, you'll need to learn about 'complex' numbers (useful for describing waves and other oscilating things), and if you want to learn about classical electromagnetism and maxwells equations (well worth the effort, they are immesley cool), you will need to learn some vector analysis. If you already know this type of maths a little, heres some great meterial to read, highly recomended: http://www.scribd.com/doc/18086908/Introductory-Electromagnetics-Z-Popovic-B-Popovic
