A mirror-type (plate) beamsplitter is an optical window with a semi-transparent mirrored coating to break a beam into two or more separate beams. A beamsplitter will reflect a portion of the incident energy (see reflection %), absorb a relatively small portion, and transmit the remaining energy (see transmission %). Mirror-type beamsplitters have very neutral color characteristics and are often referred to as plate beamsplitters.
| Specifications | |
| Material | Optical Glass |
| Dimension Tolerance | +/-0.1mm |
| Parallelism | 3 arc min. |
| Surface Quality | 80-50 scratch and dig |
| Bevel | 0.1mmX45 degree |
| Coating | Circle Aluminum(ALMgF2) Apertures |
| Reflect./Trans. Tolerance | ±5% |
| Type | 50R/50T; 70R/30T |
