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energy Handbook Articles
Passive Athermalization: Maintaining Optical Performance Over Temperature
Jan 1, 2015 — An optical system is athermalized if its critical performance parameters (such as modulation transfer function, back focal length and effective focal length, etc.) do not change appreciably over the operating temperature range. For rotationally...
Physical Constants & Conversion Factors
Jan 1, 2015 — Table of Physical Constants & Conversion Factors.
Connectors and Splices: Correct Alignment Spells Success
Mar 8, 2009 — Whether the job is splicing fibers together or connecting fibers to system devices, alignment is the key to success. This article explores the many ways to achieve that goal. Just as an electronic connector provides a pluggable connection between...
OTDRs: Finding the Weak Spots in Fiber Links
Mar 8, 2009 — The optical time-domain reflectometer (OTDR) is used to characterize a fiber optic span. It performs single-ended tests and can calculate fiber attenuation and uniformity and splice and connector losses. It can also locate breaks and determine fiber...
Radiometry: A Simplified Description of Light Measurement
Mar 8, 2009 — Radiometry involves measuring and predicting levels of optical radiation. This article removes some of the confusion surrounding this often complex technology. Radiometry involves several activities. The two most common are the description and...
Ultraviolet Reflectance Imaging: Applications
Mar 8, 2009 — Ultraviolet imaging has long been thought to be difficult and awkward by many photographers because of the difficulties encountered when using photographic film in the near-UV...
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Lasers: The Industrial Workhorse
Apr 14, 2006 — Four decades ago, the first industrial use of lasers was for drilling through diamonds or wire draw dies. From that beginning the laser has become an integral part of the conventional technology in many production plants. In the forefront of that...
Digital Cameras: Smaller Pixels for Higher Resolution
Apr 13, 2006 — Reducing pixel size can increase a digital camera's performance. However, there are tradeoffs that need to be considered when going that route. In the search for ever-higher pixel counts for the digital still camera, it is clear that, if chip size...
Photomultipliers: Low-Light, High-Speed Specialists
Apr 13, 2006 — Rapid detection of light calls for a sensitive detector and electronics that do not introduce additional signal noise. In fact, for very rapid detection, detector shot noise does not determine the signal-to-noise ratio. Instead, the amplifier has...
Polarization Mode Dispersion: Concepts and Measurement
Apr 13, 2006 — The performance of high-speed, digital fiber optic communications systems depends upon how reliably the receiver is able to distinguish closely spaced bits of information. Dispersive effects — physical mechanisms that broaden transmitted...
(10 results found)
March 2024
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