- The pentaprism is an image-erecting prism that deflects an incoming light beam by exactly 90° without flipping or mirroring the image. It achieves this deflection through two total internal reflection surfaces and one refracting surface. Widely employed in camera viewfinders and precision measurement instruments, it serves as a compact, robust alternative to complex mirror assemblies.
Specifications:
Parameter Details Material K9 glass or equivalent Dimensions 15×15×15mm~40×40×40mm Surface Coating Input/output faces: Anti-reflection (AR) coating Reflective faces: High-reflectivity coating Deflection Angle 90° Image Orientation Upright, non-mirrored (true orientation) Operating Wavelength Range Visible spectrum 
- Applications:
• Precision metrology instruments
• Industrial machine vision systems
Prism
Pentaprism
A pentaprism is a five-sided prism that deviates incident light by 90° while preserving the image’s handedness (i.e., producing a non-reversed, right-handed image).
