The Powell lens has an advantage over cylindrical lenses because later one produces a poorly illuminated line, limited by the non-uniform Gaussian laser beam. Huge spherical aberration redistribute light along the line, decreasing the light in the central area while increasing the light intensity at the lineâ??s end. The outcome is uniformly illuminated line used in all manner of machine vision applications.
The right angle prisms are often preferable to an inclined mirror in applications involving severe acoustic or inertial loads, because they are easier to mount, and deform much less than mirror in response to external mechanical stress. As long as acceptance angle limitations for TIR from the roof faces are not exceeded, the right angle prisms can serve as a retro reflector, turning beams back to the original direction.Right-angle prism is the most common type of prisms. It is used to re-direct a beam of light at 90 degrees
from the the incident direction or used as a 180 beam retro-reflector. They are often coated with various optical coatings to form cubic beam splitters and color separation cubes used in various projection systems.
Specifications:
Material BK7, UVFS
Dimensional tolerances ±0.01mm
Clear aperture 95%@central area
90 angle tolerance ±2 arcmin (General type)
±5 arcsec (Precision type)
Pyramidal tolerance ±1 arcmin (General type)
±30 arcsec (Precision type)
Surface quality 40-20 S-D
Surface flatness
