Compare Model Drawings, CAD & Specs Availability Price
Polka Dot Beamsplitter, 25.4 mm Diameter, 250-2500 nm
$240
In Stock
In Stock
Polka Dot Beamsplitter, 25.4 x 25.4 mm, 250-2500 nm
$243
In Stock
In Stock
Polka Dot Beamsplitter, 50.8 x 50.8 mm, 250-2500 nm
$410
In Stock
In Stock

Features

Polka Dot Pattern Beamsplitting

These beamsplitters are coated with aluminum and SiO protective overcoat in a "polka dot" pattern. The pattern is a series of aluminum dots, 2.5 mm in diameter, separated by a 3.2 mm center-to-center distance. Light is reflected by the metal-coated areas of the beamsplitter and transmitted through the uncoated areas of the beamsplitter.

50/50 Split From 250 to 2500 nm

Optimized for white light illumination applications, the smallest beam diameter suitable for a 50/50 split is 0.37 inches (9.5 mm). For beams larger than this, 50% of an incident beam hits the coated area and is reflected. The other 50% of the incident beam hits the uncoated fused silica and is transmitted. Metal is relatively insensitive to the angle of incidence and polarization, so changes to the reflection of the coated area can be neglected over a wide range of incident angles. The reflection of the uncoated area is determined by the Fresnel effect which is angle- and polarization-sensitive, but this is a minor effect except for very high angles of incidence. For angles up to 45°, specified performance can be expected.