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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...
Plastic Optics: Specifying Injection-Molded Polymer OpticsPlastic Optics: Specifying Injection-Molded Polymer Optics
The use of precision polymer optics is becoming an increasing necessity today as products demand sophisticated light handling components to achieve desired results. Polymer optics can be thought of...
Excimer Optics: High Power Demands High ReliabilityExcimer Optics: High Power Demands High Reliability
Michael A. Case, Teledyne Princeton Instruments, Business Unit of Teledyne Technologies
The first high-reflectance mirror coatings for the UV and vacuum UV (VUV) were of the Al + MgF2 type produced in the late 1950s. Coatings of this design are still used today for multigas cavity...
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...
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 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...
Beryllium Mirrors: Refinements Enable New ApplicationsBeryllium Mirrors: Refinements Enable New Applications
Vladimir Vudler and Peter Richard, Hardric Laboratories, Inc.
With a specific gravity of 1.85 g/cm3, beryllium is the lightest metal that is workable. It is 45 percent lighter than aluminum and approximately five times as stiff. Its stiffness to weight ratio...
Rules of ThumbRules of Thumb
Photonics Rules of Thumb Scientists and engineers tend to want to answer simple relational questions with a blackboard covered with equations, even when questioners just want a rough estimate to...
Optical Coatings: Improving Traditional TechnologyOptical Coatings: Improving Traditional Technology
Arthur T. Howe, CHROMATEL; Mervyn Davis, Nordiko Technical Services Ltd.; and David Pearson, Pearsonics Ltd.
The common polycrystalline materials used for optical thin-film materials do not satisfy the requirements of telecommunications because of the instabilities caused by moisture absorption in their...
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...
Heat Control and Lighting Systems Design: Optical Coatings Separate Light from HeatHeat Control and Lighting Systems Design: Optical Coatings Separate Light from Heat
Eric Krisl, Deposition Sciences Inc.
Controlling and minimizing heat output is desirable in most lighting applications. For example, conventional incandescent light sources are very inefficient with only a small portion of the...
Optical System Design: Keeping the Coatings in MindOptical System Design: Keeping the Coatings in Mind
An optical coating engineer is frequently confronted with a difficult specification for a coating. Often the difficulty in the specification results from the particular form of the optical system. If...
Cleaning Optics: Choosing the Best MethodCleaning Optics: Choosing the Best Method
CVI Laser Optics
Optics can be contaminated in many ways. Contamination can be kept to a minimum by returning the optics to their case after use or by covering the optics for protection from the outside environment....
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...
Antireflection Coatings for the Ultraviolet, Visible and Near-IRAntireflection Coatings for the Ultraviolet, Visible and Near-IR
Beamsplitters: A Guide for DesignersBeamsplitters: A Guide for Designers
CVI Melles Griot
Plate beamsplitters Plate beamsplitters consist of a thin plate of optical crown glass with a different type of coating deposited on each side. The first surface is coated with an all-dielectric...
Optical Components: Finding Your Way Through the MazeOptical Components: Finding Your Way Through the Maze
CVI Melles Griot
Lenses come in a variety of shapes, sizes and materials. They can be made of a single piece of glass or have multiple elements; their surfaces can be spherical, aspheric or cylindrical; they can be...
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