Product category:
Vision and scanning systems
News Release from: Reynard | Subject: Circular variable neutral density filters
Edited by the Manufacturingtalk Editorial
Team on 15 January 2007
Circular variable neutral density
filters
Reynard, a supplier of optical components and thin film coatings has announced complete customisation of its Circular Variable Neutral Density (CVND) Filters.
Reynard, a leading global supplier of optical components and thin film coatings has announced complete customisation of its Circular Variable Neutral Density (CVND) Filters This technology is best used in high quality optical systems to change the intensity of light from 100% to less than 0.1%
This article was originally published on Manufacturingtalk on 1 Mar 2007 at 8.00am (UK)
Related stories
Apodizing neutral density filter
The Bullseye apodizing neutral density filter (p/n R01450-00) has been introduced by Reynard.
Faro shows how portable CMM avoids scrap, re-work
A video shows users of manual gauging equipment that Faro gauges are just as user-friendly, but help them do their jobs faster with less scrap, re-work and labor costs.
As the filter rotates the beam intensity is modified due to the density variation of a gradient metallic coating around the filter.
Used from the UV to the Far Infrared, density neutrality can be achieved for narrow band applications, such as lasers, to wide band applications, such as the spectrum of white light.
These filters are fully customizable in optical density gradient function, transmission gradient function, substrate type, coating materials, and size to match your application requirements.
Further reading
Ultrasonics ensure mechanical bolting integrity
For more specialised tasks where measurement of the fastener tension is essential to ensure the integrity of the mechanical joint, Norbar has introduced the USM-3 ultrasonic bolt meter.
Torque wrench is comfortable and communicates
An ergonomically comfortable torque wrench is claimed to offer most advanced measurement technology, storage and SPC capabilities currently available in tools of its type.
These filters are typically specified in linear optical density or transmission.
But, since all optical systems are not linear in operation, Reynard Corporation offers the capability of customizing the density gradient based on user defined functions.
The filters can be made on a variety of substrates including BK-7, Fused Silica, ZnSe, and Ge, among several others.
The typical coating material is a nickel variant for room temperature, low-power applications.
But, the ND coating can be enhanced to increase survivability in hostel environments by the use of other common and precious metals to match the absorption, spectral, and environmental characteristics of a customised system.
The key features are: CVND's can be supplied as a linear or customised gradient function.
Gradient coatings can be supplied from 45deg to 360deg of rotation.
Gradient coatings are used for Laser as well as Wide Band applications CVND's can be supplied from 1.0" (~25mm) to 8" (~200mm) in diameter Gradient coatings and substrates can be supplied to operate from the UV to Far IR Custom applications are always welcomed.
In imaging systems, large aperture neutrality with constant density can be achieved by configuring two filters of equal design back-to-back.
Counter-rotating the two filters allows for a variable setting of the density or transmission requirement in both the rotational and radial directions.
"For large aperture imaging, the two-filter solution offers adjustment flexibility that cannot be physically achieved by any other means," says Forrest Reynard, President of Reynard Corporation, "High-resolution cameras can operate with full aperture while still being able to attenuate light.".
• Reynard: contact details and other news
• Email this article to a colleague
• Register for the free Manufacturingtalk email newsletter
• Manufacturingtalk Home Page
Search the Pro-Talk network of sites
