Material |
BK7, UV FS |
Surface quality |
20-10 scratch & dig (MIL-PRF-13830B) |
Surface flatness |
λ/10 at 633 nm |
Angles |
α = 79.5° ± 0.5°, β = 60° ± 1° |
Design wavelength |
546.1 nm |
Dimensions tolerance |
± 0.2 mm |
Clear aperture |
> 80% of dimensions |
EKSMA Optics Pellin-Broca Prisms
95.45 kB |
In a Pellin-Broca prism, an ordinary dispersing prism is split in half along the bisector of the apex angle. Using a right angle prism, the two halves are joined to create a dispersing prism with an internal right angle bend obtained by total internal reflection. The entrance beam is deviated at 90° angle to its initial direction.