As a recognized leader in the manufacture of high-quality optical filters and coatings, Andover deliver precision solutions for use in air, water, and gas analyzers, chemical analysis, machine vision, medical diagnostics, and astronomy. Whether you need just one custom filter or thousands of off-the-shelf products, you have our guarantee of excellent craftsmanship, exceptional performance, and unsurpassed service with every order.
Filters include image quality, narrow and broadband filters, mounted to allow durability. A wide range of standard Bandpass Filters are available, supplied with individual transmission curves.
Andover offers one of the most extensive selections of bandpass filters in the industry, including many of the primary laser, mercury, biomedical, and analytical spectral lines. We use a proprietary method to stabilize our products to prevent drift of peak wavelength with age and hermetically seal each filter for maximum protection against humidity. Each filter is mounted in a black anodized aluminum ring, adding further protection against chipping, scratching, and moisture penetration.
Andover now offers a high-transmittance variant of its standard bandpass filter selection. By tailoring the blocking range to match the detector, we can provide maximum possible throughput while maintaining good blocking to meet the customer’s needs. Wavelengths include all popular laser, mercury biomedical and analytical spectral lines. All filters are constructed using the same highquality materials and methods as our standard bandpass filters, thus providing a highly stable, long-lasting filter.
Our first-surface, hard-coat, broadband filters employ magnetron sputtered, hard-oxide coatings deposited on Borosilicate Glass and do not utilize any absorbing filter glasses, making them suitable for high temperature applications. They provide a steep transition from a high, peak transmission to OD4 blocking. Available at standard Raman wavelengths: 488, 514, 532, 633, 785nm. We offer three standard sizes, with custom sizes available on request.
Thanks to a large inventory of components, Andover Corporation can fabricate and deliver higher performance commercial quality bandpass filters to your specifications as soon as 5-10 days from receipt of order. To specify your semi-custom filter, all you have to do is follow three quick steps:
1. Select the desired bandwidth, filter type, and center wavelength from the range listed.
2. Select the blocking range.
3. Select the size and corresponding part number.
All other features are predetermined by these three choices. The out-of-band blocking of these filters is 1 x 10-4 within the defined spectral range. Optional threaded rings are available, and image quality versions are also available. Please call for pricing and delivery.