A cube beamsplitter is a precision optical component formed by cementing two identical right-angle prisms along their hypotenuses, with a beam-splitting thin film deposited between the angled surfaces. It enables efficient, compact, and high-performance beam splitting. According to its design, the film layer reflects part of the light energy and transmits the remainder, thereby splitting the beam into two that exit from two mutually perpendicular output faces.
Zero ghosting and low stray light
Precisely perpendicular output beam paths
Fixed splitting ratio and relatively high cost
| Material | H-K9L or UVFS |
| Surface Flatness | λ/10@633nm |
| Transmitted Beam Deviation | ±5' |
| Reflected Beam Deviation | 90°±5′ |
| Beam Splitting Ratio | R/T±10% |
| Dimension Tolerance | ±0.2mm |
| Surface Quality | 40/20-60/40 |
| Coating | Hypotenuse splitting film + AR coatings on other surfaces |
