Compare Model Drawings, CAD & Specs Size Optical Density Optical Density Tolerance Wavelength Range Material Availability Price
shortpass filter set
$376
In Stock
Ø25.4 mm 400-2000 nm B270 Optical Crown Glass
In Stock
$29
In Stock
Ø25.4 mm 0.04 ±2.5% 400-2000 nm B270 Optical Crown Glass
In Stock
$41
In Stock
Ø25.4 mm 0.1 ±8% 400-2000 nm B270 Optical Crown Glass
In Stock
$42
In Stock
Ø25.4 mm 0.2 ±7% 400-2000 nm B270 Optical Crown Glass
In Stock
$42
In Stock
Ø25.4 mm 0.3 ±6% 400-2000 nm B270 Optical Crown Glass
In Stock
$42
In Stock
Ø25.4 mm 0.4 ±5% 400-2000 nm B270 Optical Crown Glass
In Stock
$42
In Stock
Ø25.4 mm 0.5 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$42
In Stock
Ø25.4 mm 1 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$42
In Stock
Ø25.4 mm 1.5 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$42
In Stock
Ø25.4 mm 2 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$42
In Stock
Ø25.4 mm 2.5 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$42
In Stock
Ø25.4 mm 3 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$46
In Stock
50.8 x 50.8 mm 0.04 ±2.5% 400-2000 nm B270 Optical Crown Glass
In Stock
$66
In Stock
50.8 x 50.8 mm 0.1 ±8% 400-2000 nm B270 Optical Crown Glass
In Stock
$66
In Stock
50.8 x 50.8 mm 0.2 ±7% 400-2000 nm B270 Optical Crown Glass
In Stock
$66
In Stock
50.8 x 50.8 mm 0.3 ±6% 400-2000 nm B270 Optical Crown Glass
In Stock
$66
In Stock
50.8 x 50.8 mm 0.4 ±5% 400-2000 nm B270 Optical Crown Glass
In Stock
$66
In Stock
50.8 x 50.8 mm 0.5 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$66
In Stock
50.8 x 50.8 mm 1 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$66
In Stock
50.8 x 50.8 mm 1.5 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$62
In Stock
50.8 x 50.8 mm 2 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$66
In Stock
50.8 x 50.8 mm 2.5 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock
$66
In Stock
50.8 x 50.8 mm 3 ±4% 400-2000 nm B270 Optical Crown Glass
In Stock

Features

Finely Control Beam Attenuation

Filters from this product family may be used individually, or combined in series, to obtain any desired density from 0 to 7 in steps of 0.1OD. Please note that stacking an excessive number of filters may lead to numerous unwanted back reflections. All filters are shipped with a transmission curve.

ND Filter Sets

These filters are available in a set of eight. The set consists of a logical assortment of filters packaged in a protective hardwood case. All filters are shipped with a transmission curve.

Additive Optical Densities

Optical density (OD) is given by the relationship: OD = -log(T) or T = 10(-OD) where T is transmittance (0≤T≤1). Optical Density, unlike transmittance, is additive. When multiple filters are stacked, the total density is easily found by adding up the densities of each filter in the series. For example to achieve desired transmittance of 8%, first calculate the equivalent density (OD = -log(0.08) = 1.097 ≅ 1.1), then find a combination of filters that adds to the desired number, such as a combination of an OD1 filter and an OD0.1 filter.

Proper Orientation

To prevent unwanted interference from etalon effects, filters should be angled slightly with respect to the incident beam. To minimize back reflections, the filter should be oriented with the coated metallic surface facing the incident beam. Any light reflected from the uncoated second surface will pass through the metallic coating first, which will greatly attenuate unwanted back reflections.