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Diffraction Gratings: Selection Guidelines
David Ventola, Optometrics Corp., an Omega Optical Holdings company
Diffraction gratings are optical components with a periodic structure that separate light into beams traveling in predictable directions based on their wavelength. The grating acts as the dispersive...
Measuring Aspheres: Selecting the Best Technique
Amy Frantz, Edmund Optics Inc.
The benefits of aspheric lenses are numerous: They allow for a reduction in spherical aberrations and are ideal for focusing or collimating light, as they can achieve a low ƒ-number. Aspheres...
Understanding Surface Quality: A Practical Guide
John C. Smith, Rocky Mountain Instrument Co. (RMI)
Surface quality has become one of the most poorly understood specifications in the optics industry. A significant portion of the confusion stems from the two major competing (and largely...
Ultraviolet Filters: Past and Present
Sarah Locknar, PhD, Omega Optical LLC, an Omega Optical Holdings company
In their earliest forms, UV bandpass filters that were optimized for wavelengths less than 400 nm, such as the Schott UG or the Hoya U-series, were constructed of absorbing compounds in glass. Such...
Thin-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...
Plastic Optics: Specifying Injection-Molded Polymer Optics
William S. Beich, GS PLASTIC 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...
Optical Delay Lines: Key to Time-Resolved Measurements
MKS/Newport
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...
Acousto-Optic Devices
ACOUSTO-OPTIC SCANNING DEVICES: CHARACTERISTICS MODULATORS Material Bandwidth (MHz) Rise Time (ns) Acousto Input Power (W) (Saturation) Material Wavelength Range...
Nano-Optics Technology: Optical Alchemy
Hubert Kostal, NanoOpto Corp.
Optics today needs alchemy, and the forces that motivate microchip technology are a key reason why. Today, light can transmit and process digital information as well as electricity can — in...
Nano-Optics: New Rules for Optical Components
Hubert Kostal, NanoOpto Corp.
When physical structures get very small — on the order of molecular or atomic sizes with one or more dimensions on the nanoscale — their behavior and interactions with energy, including...
Optical 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...
Adaptive Optics: Taming Atmospheric Turbulence
Tom Gonsiorowski, Adaptive Optics Associates, Inc., a Wholly Owned Subsidiary of Northrop Grumman Systems
To Isaac Newton the problem was clear, and in 1704 he realized the effects of atmospheric turbulence on image formation. Just as heat waves shimmering above a hot patch of ground can distort our...
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