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 | BK7 Grade A optical glass |
| Dimension Tolerance | +/-0.2mm |
| Parallelism | 30 arc senonds . |
| Surface Quality | 60-40 scratch and dig |
| Surface Accuracy | λ/4@632.8nm per25.4mm |
| Bevel | 0.1mmX45 degree |
| Trans./ Reflect. | T=(Ts+Tp)/2, R=(Rs+Rp)/2 T/R=50/50±5%, |
Narrow Band Beamsplitter Plate
| Coating | (Incidence angle: 45deg)
S1: Single wavelength partial reflectance; S2: "V" AR Coating |
| Wavelength(nm) | 488, 532, 635, 670, 780, 850, 980, 1064nm |
Broadband Beamsplitter Plate
| Coating | (Incidence angle: 45deg)
S1: Broadband partial reflectance; S2: Broaband AR Coating |
| Wavelength(nm) | 450-650nm, 650-900nm, 900-1200nm |
