Xem 1-20 trên 80 kết quả Light sources
  • This book is separated into three main parts: Part I, “Lighting Theory,” Part II, “3ds max Lighting Tools,” and Part III, “Creating Lighting.” Part I covers the fundamentals of what light is, how it acts and reacts in our world, and what those reactions look like. Part II covers the virtual lighting equipment available to achieve your 3ds max lighting goals. Part III deals with how to use those tools to create the lighting we desire. Theory is first in this book because it is fundamental to using the tools.

    pdf180p ptng13 06-06-2012 131 41   Download

  • This edition of Optical Metrology contains a new chapter about computerized optical processes, including digital holography and digital speckle photography. Chapter 2, on Gaussian optics, and Chapter 5, on light sources and detectors, are greatly expanded to include descriptions of standard imaging systems, light-emitting diodes and solid-state detectors. Separate new sections on optical coherence tomography, speckle correlation, the Fast Fourier Transform, temporal phase unwrapping and fibre Bragg sensors are included. Finally, a new appendix about Fourier series is given.

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  • Light sources should be as small as possible, produce light efficiently and have a long life. The demands of architects, light planners and operators of lighting installations have formed the basis of the research and development work of the lighting industry. Today more light sources with these properties are on the market than ever before in the history of artificial light. Until now, however, no filament or discharge lamp has combined all three properties. Only light emitting diodes (LEDs), also called light diodes, achieve this.

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  • Light is just one portion of the various electromagnetic waves flying through space. The electromagnetic spectrum covers an extremely broad range, from radio waves with wavelengths of a meter or more, down to x-rays with wavelengths of less than a billionth of a meter. Optical radiation lies between radio waves and x-rays on the spectrum, exhibiting a unique mix of ray, wave, and quantum properties.

    pdf64p beobobeo 01-08-2012 26 4   Download

  • The field of photonics is enormously broad, covering everything from light sources to geometric and wave optics to fiber optics. Laser and light source technology is a subset of photonics whose importance is often underestimated. This book focuses on these technologies with a good degree of depth, without attempting to be overly broad and all-inclusive of various photonics concepts. For example, fiber optics is largely omitted in this book except when relevant, such as when fiber amplifiers are examined.

    pdf349p echbuon 02-11-2012 28 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Practical Approach for Simultaneous Estimation of Light Source Position, Scene Structure, and Blind Restoration Using Photometric Observations

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  • Beginning Blender covers the Blender 2.5 release in-depth. The book starts with the creation of simple figures using basic modeling and sculpting. It then teaches you how to bridge from modeling to animation, and from scene setup to texture creation and rendering, lighting, rigging, and ultimately, full animation. You will create and mix your own movie scenes, and you will even learn the basics of games logic and how to deal with games physics.

    pdf449p hoa_can 29-01-2013 56 19   Download

  • The dramatic reduction in transmission loss of optical fibers coupled with very important developments in the area of light sources and detectors have resulted in phenomenal growth of the fiber optic industry during the last 35 years or so. Indeed, the birth of optical fiber communication systems coincided with the fabrication of low-loss optical fibers and the operation of room-temperature semiconductor lasers in 1970. Since then, scientific and technological growth in this field has been phenomenal.

    pdf259p nguyenthai_thinh 16-03-2013 38 10   Download

  • First and foremost, i wish to thank my publisher, wes beckwith, for his endless encouragement, support, and enthusiasm.I am grateful for the confidence he placed in me to complete this project to a hight standard and on schedule.Thanks to all the over wordware folks for their contri- butions and efforts on this book , eschewwing obtributions at every turn

    pdf45p arstanle 05-09-2012 26 6   Download

  • Harrison's Internal Medicine Chapter 57. Photosensitivity and Other Reactions to Light Solar Radiation Sunlight is the most visible and obvious source of comfort in the environment. The sun provides the beneficial effects of warmth and vitamin D synthesis; however, acute and chronic sun exposure also have pathologic consequences. Few effects of sun exposure beyond those affecting the skin have been identified, but cutaneous exposure to sunlight is the major cause of human skin cancer and can exert immunosuppressive effects as well.

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  • In 2009 the world celebrated 50 years of lasers, bringing to the attention of the public how deeply lasers and laser related technologies have revolutionized both science and everyday life. Next year will be the fiftieth anniversary of the semiconductor laser. Used as a compact light source with high modulation rates, it transformed telecommunications in combination with glass fibers. Today laser diodes are omnipresent in data storage and communication. Still, most of these applications are based on infrared or red laser diodes.

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  • Basics of light and lighting presents about Preface – What is good lighting? What is light? Behaviour; Colour; Sources; Photometrics; Lighting; Vision; Lighting quality; Lighting systems; Luminaires; Lighting and the environment.

    pdf58p macj55 05-07-2016 19 4   Download

  • The Basic 3D effect manipulates a layer in an imaginary 3D space. You can rotate your image around horizontal and vertical axes and move it toward or away from you. With Basic 3D, you can also create a specular highlight to give the effect of light reflecting off a rotated surface. The light source for the specular highlight is always above, behind, and to the left of the viewer. Because the light comes from above, the image must be tilted backward to see this reflection. This can enhance the realism of the 3D appearance. The specular highlight can be viewed...

    pdf20p emilynguyen 07-08-2009 290 149   Download

  • Introduction to LEDs: How LEDs work + some points. Comparison with other sources of light. LED in communication. Blue &White LED technologies. How they are made? Their application? Brief about blue laser? Stands for light emitting diode. Semiconductor device: p-n junction forward-biased.current emits incoherent narrow spectrum light (due to recombination in transition region near the junction.) Color of the emitted light depends on the chemical of the semiconducting material used. (Near-ultraviolet, visible or infrared.)...

    ppt52p lehieukutek 26-12-2009 178 132   Download

  • First off, it’s all about the lumens. Lumens are the visible light given off by a source, and they are the ultimate goal. Wattage has often been confused with lumens, thanks to how incandescent bulbs are rated (everyone knows that a 60W bulb is not as bright as a 100W one), but more efficient lighting technologies have greatly changed the relationship between wattage (essentially power usage) and lumens (light output). For example, an incandescent might operate at about 12-15 lumens-per-watt (lm/W), while an LED bulb will be in the range of 40-50, a much greater luminous efficacy...

    pdf69p aries23 29-09-2012 61 30   Download

  • Classification a. Means of transmission b. Service c. Circuit switched network d. Method of signalling e. Electronic system f. Light sources g. Remote part of an exchange Characteristics /Function A. It provides a means of asynchronous data transmission. B. It uses one pair for performing all signalling functions of one route. C. It involves the sampling and coding of analogue signals. D. They enable PCM transmission to be used further out in the local network.

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  • The purpose of a preface in our view is rather unashamedly to sell the book—to communicate the message of the book succinctly and either to motivate the reader to explore its content or to leave the reader feeling that just maybe he or she is losing out if the book’s theme does not fire their imagination.

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  • This handbook is a continuation of our efforts to gather state-of-the-art research on power systems topics in Operations Research. Specifically, this handbook focuses on aspects of power system networks optimization and is, as such, a specialization of the broader “Handbook of Power Systems I & II,” published by Springer in 2010. For decades, power systems have been playing an important role in humanity. Industrialization has made energy consumption an inevitable part of daily life.

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  • We have been manipulating power since the time of the caveman. About half a million years ago, mankind mastered fire. The energy source was easy, even for them, to understand; if you touched it, you would get burned. A 1000 years later, the ancient Greeks discovered that rubbing fur on amber caused a spark of energy, and by the seventeenth century, the differentiation between positive and negative currents was discovered.

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  • Serial Connection And Parallel Connection Figure 1 shows the most basic and commonly used circuits for driving light-emitting diodes. In Figure 1(A), a constant voltage source (VCC ) is connected through a current limiting resistor (R) to an LED so that it is supplied with forward current (IF). The IF current flowing through the LED is expressed as IF = (V CC - VF)/R, providing a radiant flux proportional to the IF. The forward voltage (V F) of the LED is dependent on the value of IF, but it is approximated by a constant voltage when setting R. Figures 1(B) and...

    pdf44p lehieukutek 26-12-2009 94 11   Download

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