Spectroscopic wedge

• Optical component materials: UV fused silica, calcium fluoride, zinc selenide
• Dimensions: Ø12.5mm, 12.5×12.5mm, Ø12.7mm, Ø25mm, 25×25mm, Ø25.4mm, Ø50mm, 50×50mm, Ø50.8mm
• Spectral ratio (R:T): 30:70, 50:50, 70:30
• Band range: 250-400nm, 400-700nm, 700-1100nm, 2-8μm, 7-14μm
• The spectral ratio is 50:50 when the angle of incidence (AOI) is 45°
• With a wedge angle of 30 arc minutes, ghosting is minimized

The dielectric partial reflective film on the front surface of the Wedged Beamsplitter provided by Dimension-Labs determines the spectral ratio, and the back surface is wedge-shaped or anti-reflection coating can be used to reduce ghosting and interference effects. The coating on the beamsplitter mirror is optimized for a 45° angle of incidence (AOI) and has long-term stability.

To reduce unwanted interference effects (such as ghosting) caused by the interaction of reflected light from the front and back surfaces of the optics, a 30-arc wedge surface is added to the spectroscopic wedge.