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Laser Measurement Systems: Best PracticesLaser Measurement Systems: Best Practices
Given the pace at which technology advances, there always seems to be a learning curve. With the abundance of consumer electronics available, there typically is no right or wrong way to use these...
Aspheric Lenses: Design ConsiderationsAspheric Lenses: Design Considerations
Jeremy Govier, Edmund Optics Inc.
Aspheric surfaces are powerful tools that combine the optical corrections of multiple lenses into a single element (Figure 1) and affect performance in ways that spherical optics cannot. For example,...
Laser Safety: Important ConsiderationsLaser Safety: Important Considerations
Ken Barat, Laser Safety Solutions
When purchasing an industrial laser system, the astute buyer will look for a Class 1 laser product — a system where the laser beam hazard is completely enclosed and there is no potential laser...
Transparent Ceramics: Enabling Large, Durable, Multifunctional OpticsTransparent Ceramics: Enabling Large, Durable, Multifunctional Optics
Mohan Ramisetty, Lee Goldman, Nagendra Nag, Sreeram Balasubramanian and Suri Sastri, Surmet Corp.
Single-crystal sapphire has been the material of choice for defense and other applications that require extremely durable optics, but aluminum oxynitride (ALON) and magnesium aluminate (spinel) have...
Common Infrared Optical Materials and Coatings: A Guide to Properties, Performance, and ApplicationsCommon Infrared Optical Materials and Coatings: A Guide to Properties, Performance, and Applications
Jeffrey L. Tosi and Kumar M. Khajurivala, Janos Technology LLC
The optical materials selected for an optical system depend upon the application, the required system performance and the environment in which the system is to perform; thus the materials’...
Optical Materials: Double-Sided Lapping and PolishingOptical Materials: Double-Sided Lapping and Polishing
Michael Naselaris, Sydor Optics Inc.
Double-sided processing is a batch-type process that uses planetary action — generally with loose, abrasive particles suspended in a liquid vehicle — to abrade material almost equally...
Thin-Film Coatings: A Buyers' GuideThin-Film Coatings: A Buyers' Guide
Trey Turner and Roger Kirschner, Research Electro-Optics Inc. (REO)
What are thin-film coatings? The purpose of any optical thin-film coating is to modify the transmittance and reflectance properties of the substrate material to which they are applied. Most coatings...
Optical Delay Lines: Key to Time-Resolved MeasurementsOptical Delay Lines: Key to Time-Resolved Measurements
One of the most critical elements of any time-resolved spectroscopy and dynamics experiment is the optical delay line. A typical optical delay line consists of a retroreflector or folding mirrors on...
Optical Coating: Materials and Deposition TechnologyOptical Coating: Materials and Deposition Technology
CERAC, Inc., a subsidiary of Williams Advanced Materials; technical assistance from Pellicori Optical Consulting
Optical coatings are deposited as thin-film multilayers of a variety of materials using specific deposition techniques. Coatings are applied to optical components that are intended for use at...
Transmission Ranges for Optical MaterialsTransmission Ranges for Optical Materials
Data Tables: Optical Thin-Film MaterialsData Tables: Optical Thin-Film Materials
DATA TABLES: OPTICAL THIN-FILM MATERIALS Identification Physical Parameters Material Name Material Formula Transparent Region(µm) (see note a) Index at Wavelength...
Antireflection Coatings for the Ultraviolet, Visible and Near-IRAntireflection Coatings for the Ultraviolet, Visible and Near-IR
Coefficients of Expansion and Densities of Optical MaterialsCoefficients of Expansion and Densities of Optical Materials
Material Coefficient of Expansion(×10-6 per °C) Density (lbs/cubic in.) Aluminum 23.8 0.10 Brass (cast) 18.8 0.30 Carbon (diamond) 1.2 0.25 Carbon (graphite) 7.9 - Copper 16.2 0.32...
Optical Materials: Transmission and Refractive IndexOptical Materials: Transmission and Refractive Index
Mirrors: Coating Choice Makes a DifferenceMirrors: Coating Choice Makes a Difference
The basic difference between the household mirror and the optical mirror is that one is coated on the back surface and the other is coated on the front. For optical applications, a front-surface...
High-Brightness LEDs: A Boost from  High-Performance SiliconesHigh-Brightness LEDs: A Boost from High-Performance Silicones
Linda Kastilani, Dow Corning Corp.
High-brightness LEDs have found their way into applications such as signs and displays, cell phone flash modules, automotive lighting and general illumination. Some applications, however, such as...
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