The beamsplitter plate is a flat substrate coated with a special optical thin film on one or both sides, making it the most fundamental and common beam-splitting component. Its core function is to divide an incident light beam into transmitted and reflected beams according to a specific energy ratio. The splitting ratio and spectral characteristics are determined by the design of the thin film.
Simple structure and low cost
Easy to integrate and install
Presence of ghost images and astigmatism
High sensitivity to the angle of incidence
| Material | H-K9L, UVFS, CaF2 |
| Surface Flatness | λ/4@633nm |
| Parallelism | 30±10 arcmin |
| Diameter Tolerance | +0.0/-0.25mm |
| Thickness Tolerance | ±0.25mm |
| Surface Quality | 40/20-60/40 |
| Coating | Single-sided or double-sided coating |
