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Date Announced: 13 Feb 2013
DELTA’s innovative family of linear variable filters is extended with a seventh type – the best ever linear variable order sorting filter (LVOSF).
DELTA has lifted the application range of variable filters to new levels by introducing a new powerful type of linear variable filter (LVF). The new LVOSF is the best of its kind on the market.
Since DELTA offered the first linear variable short and long pass filters in 2010, development never stopped, and the next steps were a linear variable dichroic and linear variable UV/VIS band pass filters.
The brand new linear variable order sorting filter will extend the application range of LVF largely. The LVOSF will be presented to the public during the SPIE BiOS and Photonics West shows.
A complete range of linear variable filters
A linear variable filter is a wedged filter, whose spectral properties vary linearly along the long side of the filter. The cut-on wavelength of the LVOSF varies linearly with respect to the position of the incident light.
A single LVF can replace a number of dedicated filters in an instrument and thereby decrease complexity and cost. This opens up for new design possibilities of analytical and diagnostic instruments such as (mini-) spectrometers.
By combining linear variable short and long pass filters, band pass filters can be constructed that can be tuned continuously with center wavelengths from 320 nm to 850 nm, with the added benefit of tunable bandwidth.
Superior UHC production technology
Besides setting new standards in transmission level and edge steepness, the filters offer blocking levels better than OD 3 over the complete reflection range or even OD 5 by placing two filters in series.
The filters are coated on single quartz substrates for minimal auto-fluorescence and high laser damage threshold. All of DELTA's LVF are coated with ultra-hard surface coatings (UHC) that offers much higher packing density than traditional hard coatings.
The benefits of UHC are best spectral stability (no spectral drift), increased lifetime, optimal mechanical stability and minimal water uptake. This brings use of advanced filter technology out of the laboratory and into the field.
Click Click Here for more information on DELTA’s linear variable filters
DELTA Optical Thin Film
Venlighedsvej 4
Hørsholm
DK-2970
Denmark
Tel: +45 72 19 43 60
Fax: +45 72 19 40 01
E-mail: filters@delta.dk
Web Site: filters.madebydelta.com/
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