Ray Diagrams for Lenses

demonstrations.wolfram.com The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily. This Demonstration lets you visualize the ray diagrams for converging and diverging lenses. By manipulating the object and lens locations, you can create real or virtual images. The rays parallel to the principal axis and the ray through the center of t... Contributed by: Ernest Lee

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Cyberphysics - Spectacles

Correction of myopia (short sight) and hypermetropia (long sight) by using glasses - diagrams and calculations.

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FREE ENERGY SOLAR POWER STIRLING ENGINE FRESNEL LENS

www.greenpowerscience.com This is the first segment of our half-hour weekly program. Available in HD. Shot with a Canon XH A1. THIS IS THE FULL VERSION. Solar Training Solar Thermal Training Green Power Green Energy Science.

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Defects Of Vision1

Check us out at www.tutorvista.com Defects of vision The two main defects of vision are long sightedness and short sightedness. •short-sighted - cannot focus on objects in the distance The lens does not focus the light rays from far away objects exactly onto the retina. The light rays are focused just in front of the retina. Short Sighted without Glasses If the short-sighted person wears spectacles with a concave or diverging lens the light rays spread or diverge just before they reach the eye, and then are focused exactly on the retina. Short sighted corrected with glasses Long sightedness is exactly the opposite. •short-sighted - cannot focus on objects close by The lens focuses the light rays from near by objects behind the retina. Long sighted without glasses. A long-sighted person must wear spectacles which have a convex lens. This brings in, or converges, the rays before they reach the eye so that they focus exactly on the retina. Log Sighted corrected with glasses.

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HD Video Surveillance - Power of Lenses- Section I Video 4

In the last two videos we learned how to use pixels and camera placement to calculate our Fields of Fire. Now we're going to use the power of lenses to focus this protection. A cameras' job is to gather a portion of light, measure the correct amount with an iris and pass it through a lense that focuses onto a CCD. This iris is like our own and the CCD like our retina. GATHER & CLEAN - We gather and shape the light down a gauntlet of concave and convex lenses called 'elements' that are protectively coated to deflect damaging rays...just like sunscreen. MEASURE DOSAGE - Now that the light has been gathered, cleaned and shaped it is steered through the iris to calibrate the correct dosage. FOCUS - This perfect dosage of clean light now travels a distance called 'Focal Length' from the focusing lense to the CCD. This distance is VERY important as it combines with the iris to precisely define the cameras' area of coverage and depth of view. Most cameras have a FIXED focal length that is measured in millimeters and but offer limited coverage. VariFocal lenses are the best choice for unique areas and changing conditions as they offer precise adjustment. Now, our cameras will be on the criminal like a dog on a bone.

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Optical Lens

Modeling convex and concave spherical lens from two fragments of spheres (for the main surface of the lens) and a thin cylinder between them used to close the internal space of the lens.

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Hubble's View Of The Universe [Part 4]

Hubble's View Of The Universe [Part 4 of 10] THE HUBBLE TELESCOPE Hubble works on the same principle as the first reflecting telescope built in the 1600s by Isaac Newton. Light enters the telescope and strikes a concave primary mirror, which acts like a lens to focus the light. The bigger the mirror, the better the image. In Hubble, light from the primary mirror is reflected to a smaller secondary mirror in front of the primary mirror, then back through a hole in the primary to instruments clustered behind the focal plane (where the image is in focus). THE UNIVERSE Hubble's longest exposures are like a core sample of the universe, recording galaxies at many different distances. This is one of the deepest core samples ever taken. It shows a few nearby stars in our Milky Way galaxy. The rest of the objects are distant galaxies, extending from 1 billion to over 10 billion light-years away. STARS Stars live and die over the course of millions to billions of years. It is unusual to see changes in individual stars. To learn more about them, we must piece together snapshots of stars at different life stages — from birth to death. The birth, life, and rebirth of stars is an ongoing process in the universe. The byproducts of this process include planets and the elements that make life possible. GALAXIES Galaxies come in diverse shapes and sizes. NGC 4414 — which is located about 62 million light-years away — is an example of a spiral galaxy. As with most spirals, the central ...

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ぴったりラップで可変焦点凹レンズ variable focus liquid lens

食品保存用のぴったりラップで可変焦点の凹レンズを作ってみました。材料は以下のとおり。・ぴったりラップＳ（ホームセンターで３枚入り約４００円）・塩ビパイプのジョイント（ホームセンターで約１７０円）・注射器（化粧水詰め替え用、ダイソーで１０５円）・ホットボンド（グルーガン）・水

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Phoenix - Lens - 500 mm - f/8.0 Mirror - Canon EF

Buy Phoenix - Lens - 500 mm - f/8.0 Mirror - Canon EF Order Today!

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Date Created :
Feb 02, 2011 08:21:11

Kit includes:
♦ 1) Phoenix 500mm f/8 Mirror Lens
♦ 2) Phoenix 2x Teleconverter
♦ 3) Precision Design T-Mount for Canon EOS (Autofocus)
♦ 4) Rear Lens Cap

Phoenix 500mm f/8 Mirror Lens includes: Filter Set (ND-2X, ND-4X, Skylight); Soft Pouch; Front and Rear Caps; Instruction Manual; Phoenix USA Warranty

This super-telephoto 500mm mirror lens and 2x teleconverter are incredibly compact and lightweight. Using multi-coated optics and an advanced reflex design, they're ideally suited for wildlife, nature and sports photography. The included 2x teleconverter will double the focal length to 1000mm, equivalent to the magnification a 20x high-power binocular and for additional control, a set of 3 filters (Skylight, ND-2X and ND-4X) are also supplied. Macro focusing capability provides an image to subject ratio of 1:2.7 and with the 2X teleconverter, incredibly detailed, almost life-size (1:1.35) images can be obtained. Designed to be easy to use, hold and transport, this super-telephoto lens kit offers incredible magnification and value.

Will mount to ANY Canon EOS AutoFocus Film or Canon Digital SLR Camera Including: Rebel X, Rebel XS, Rebel G, Rebel GII, Rebel 2000, Rebel Ti, Rebel T2, Rebel K2, Rebel S, Elan 7, Elan 7E, Elan 7n, Elan 7ne, EOS 1V, EOS 3, EOS 1Ds Mark II III, EOS 1D Mark II III, 10D, 20D, 30D, 40D, 5D, Digital Rebel (300D), Digital Rebel XT (350D), Digital Rebel XTi (400D), & Digital Rebel XSi (450D), Rebel XS (1000D) etc.

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• Canon Deluxe Photo Backpack 200EG for Canon EOS SLR Cameras (Black with Green Accent)
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• Canon LP-E6 Battery Pack for Select Canon Digital SLR Cameras (Retail Package)
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