Description
Penta prisms is a five-side prism, It has black painted metallic or dielectric coating on its two reflective surfaces as standard due to it can not use the function of total internal reflection based on critical angle. Penta Prisms reflects light rays through a 90ºangle by two reflections, without image rotation or inversion. It is commonly used in viewfinders of cameras, image observational systems, Plumb Level, Surveying, Alignment, Rangefinding and Optical Tooling.
Penta Prisms Specification:
Material:
N-BK7,
Fused silica or other optical glass
Dimension Tolerance:
+0.0, -0.2mm
Surface quality:
60-40 S/D
Surface flatness:
λ/4 @ 632.8nm
Angle Tolerance:
±30 arc sec(Standard); ±5 arc sec(High Precision)
Clear Aperture:
>85% of dimension
Bevel:
<0.25mm×45°
Coating:
AR coating or upon your request
