• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Certified Optical Network Engineer Core Networks
Certified Optical Network Engineer Core Networks

... exponential growth in capacity, ubiquitous coverage, total security, five-nines reliability, instantaneous flexibility and they mustn’t cost the earth, in more ways than one. If you are a fibre network engineer or manager, then a grasp of some of the individual technology offerings is no longer enou ...
FTIR Instrumentation
FTIR Instrumentation

... arm. The two component beams that make up the output beam passed to the detector are completely in phase with each other and, therefore, interfere constructively. The two component beams that make up the output beam passed to the source are completely out of phase with each other and, therefore, int ...
Dark fringes
Dark fringes

... and the distance between them. 3. Analyze the distribution characteristics of the fringes of the white light. ...
Optical Prescriptions Spectacle Lenses
Optical Prescriptions Spectacle Lenses

... Pincushion distortion and contracture of the visual field due to higher mag in lens periphery Higher order aberrations from radial astigmatism, curvature of ...
LM Ch 8: Bright Field
LM Ch 8: Bright Field

... end of the lens and the slide) decreases as magnification increases. Never-the-less, a series of objectives from a given manufacturer will remain fairly close to focus when changing from one to another, even to the oil objectives. The idea of parfocality of objectives was invented by Abbe. One preca ...
Sample Pages
Sample Pages

... With fiber bundles, the diameter of the space required for the image relay is reduced significantly, leaving more space for other instrument channels. Other advantages of fiber-optic endoscopes include transmitting the image over long distances and observing around corners. An imaging fiber bundle t ...
Single-Photon Synchronous Detection
Single-Photon Synchronous Detection

... across the differential signal of each detector. However, when saturation is reached, the differential signal begins to compress, causing background effects to resurface and contrast to be slashed. In this paper we propose a fully digital, multi-pixel phase detection method based on single-photon av ...
Infrared IR Sensor Circuit Diagram and Working Principle
Infrared IR Sensor Circuit Diagram and Working Principle

...  An infrared sensor is an electronic device, that emits in order to sense some aspects of the surroundings. An IR sensor can measure the heat of an object as well as detects the motion. These types of sensors measures only infrared radiation, rather than emitting it that is called as a passive IR s ...
user`s guide
user`s guide

... The 6550 power tubes are more rugged and stay cleaner sounding even at full power. When they do distort, the sound produced is more solid and has a tighter low end; more of a "heavy metal" type distortion with lots of power. Some tubes are available in matched sets. These tubes have been extensively ...
Growth and magnetic properties of epitaxitial MnAs thin films grown
Growth and magnetic properties of epitaxitial MnAs thin films grown

... SEM post Cu CMP is shown. The bottom schematic shows the DAC test circuit utilized to measure strain in the Si from the TSV based on a lower or higher  Ion measured with TSV strain is parallel or perpendicular to the transistor current flow. 3D integration has tremendous potential to alleviate perf ...
Triac and SCR (Thyristor) Tester Triacs and SCRs (thyristors) come
Triac and SCR (Thyristor) Tester Triacs and SCRs (thyristors) come

... Triacs and SCRs (thyristors) come in different shapes and it can sometimes be difficult to know which lead is what. With this circuit, it is possible to find out if the device is still functioning well and how to connect it. Start putting SW3 upward and connect the 3 leads of your triac/SCR. Push SW ...
Concave and Convex Mirrors
Concave and Convex Mirrors

... 1. Explain this behavior in terms of the law of reflection. Note: The dashed line R passes through what would be the center O of the sphere from which the mirror was cut. ...
Three models of light
Three models of light

... travel outward in all directions, but a diagram trying to show all these rays would be messy and confusing.  To simplify the picture, we use a ray diagram showing only a few rays. ...
Image Formation by Spherical Lenses
Image Formation by Spherical Lenses

...   Spherical Lens : It is the segment of a sphere, and it refracts  rays of light equally in all meridians..   Concave Lens: A concave lens causes light to spread out or  diverge in which the reflecting surface curves inward.  Convex Lens :   A convex lens is a lens that is curved  outward.  The ends ...
Review ! a
Review ! a

... ! Another way of producing interference phenomena is partial reflection of light from the front and back layers of thin films ! A thin film is an optically clear material with thickness on the order few wavelengths of light ! Examples of thin films include the walls of soap bubbles and thin layers o ...
Mirrors form images by reflecting light.
Mirrors form images by reflecting light.

... tools. By combining optical tools, inventors have developed powerful instruments to extend human vision. For example, the microscope uses a combination of mirrors and lenses to make very small structures visible. Telescopes combine optical tools to extend vision far into space. As you will see, some ...
Physics 323 Lecture Notes Part I: Optics
Physics 323 Lecture Notes Part I: Optics

... When light propagates in a transparent material medium, its speed is in general less than the speed in vacuum c. An interesting consequence of this is that a light ray will change direction when passing from one medium to another. Since the light ray appears to be “broken”, the phenomenon is known a ...
978-1-4577-0274-7/11/$26.00 ©2011 IEEE DSP2011
978-1-4577-0274-7/11/$26.00 ©2011 IEEE DSP2011

... joint Lucas-Kanade method (JLK) and the selective smoothing scheme of Nagel and Enkelmann (NE). Notice that the accuracy of the JLK algorithm depends strongly on a LucasKanade scheme. Therefore, we may conclude that JLK may perform better for sparse optical flow applied to features [12] than to dens ...
Optics 101 for non-optical engineers
Optics 101 for non-optical engineers

... and focusing on a subject at the same distance, a longer focal length lens will have a shallower depth of field (even though the pictures will show something entirely different). ...
Plancks_Constant_Red_Tide
Plancks_Constant_Red_Tide

... After group discussion, write a one-paragraph conclusion that summarizes the results of this ...
52.3: An Improved Polarizing Beamsplitter LCOS Projection
52.3: An Improved Polarizing Beamsplitter LCOS Projection

... photopic portion of the spectrum, whereas the MacNeille hovers below 500:1 for certain angles. In the design example that follows, the ray angle at the PBS was maintained at a maximum of 14.5 degrees (f/2.0). The extinction ratio was anticipated to be problematic for the MacNeille beamsplitter and t ...
Waves & Oscillations Physics 42200 Spring 2014 Semester Lecture 39 – Review
Waves & Oscillations Physics 42200 Spring 2014 Semester Lecture 39 – Review

... • An optical system consists of a horizontal linear polarizer, a solution of dextrorotary sugar, which rotates the plane of polarized light by +45°, followed by a left circular ...
X-Wall ® MX+ - Enova Technology
X-Wall ® MX+ - Enova Technology

... right in between host SATA adapter and the device SATA controller, encrypting entire SATA drive with wire speed performance while providing 256-bit AES hardware strength in ECB, CBC or XTS mode of operation. System performance with X-Wall MX+ engaged is unaffected. XWall MX+ can be operated with SAT ...
Projecting Chromatic Aberrations
Projecting Chromatic Aberrations

... red-orange edge will be seen on the light pattern there. If the paper screen is placed somewhat beyond the second lens, a blue edge will be seen. These chromatic aberrations are also shown in the ray diagrams of Figure 1. Some overhead projectors 12 allow the arm holding the second lens to be folded ...
Photomultiplier Tubes. Construction and Operating Characteristics
Photomultiplier Tubes. Construction and Operating Characteristics

... 6) Microchannel plate (MCP) ...
< 1 ... 40 41 42 43 44 45 46 47 48 ... 79 >

Night vision device



A night vision device (NVD) is an optoelectronic device that allows images to be produced in levels of light approaching total darkness. The image may be a conversion to visible light of both visible light and near-infrared, while by convention detection of thermal infrared is denoted thermal imaging. The image produced is typically monochrome, e.g. shades of green. NVDs are most often used by the military and law enforcement agencies, but are available to civilian users. The term usually refers to a complete unit, including an image intensifier tube, a protective and generally water-resistant housing, and some type of mounting system. Many NVDs also include optical components such as a sacrificial lens, or telescopic lenses or mirrors. An NVD may have an IR illuminator, making it an active as opposed to passive night vision device.Night vision devices were first used in World War II, and came into wide use during the Vietnam War. The technology has evolved greatly since their introduction, leading to several ""generations"" of night vision equipment with performance increasing and price decreasing. Consequently, they are available for a wide range of applications, e.g. for gunners, drivers and aviators. Another term is ""night optical/observation device"" or NOD.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report