BSW40-1064 Dia:0.5in 50:50 Laser Line Plate Beamsplitter; Coating: 1064nm; t=3.0 mm

The BSW40-1064 is a circular beam splitter, offered by Thorlabs, with a diameter of 0.5 inches and a thickness of 3.0 mm. This beamsplitter is designed for use with a wavelength of 1064nm, making it suitable for a wide range of applications in the field of optics and photonics.

The BSW40-1064 features a 50:50 beam splitting ratio, meaning it evenly divides incoming light between its reflection and transmission paths. This makes it an ideal choice for applications that require balanced light distribution, such as interferometry or beam combining.

The beamsplitter is made from Calcium Fluoride (CaF2), a material known for its excellent optical properties, including high transparency and damage threshold. The front surface of the beamsplitter is coated with a broadband anti-reflection coating (tho bsw1064), which reduces reflection and increases transmission. The back surface is coated with a visible anti-reflection coating (tho v-ar-1064), which further enhances transmission and reduces back reflections.

The BSW40-1064 is available in a thin lens shape, which offers several advantages over traditional beamsplitters. These include a reduced angle of incidence, which minimizes beam deviation, and a compact design, which makes the beamsplitter easier to integrate into optical systems.