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By adding a wedge and with partial reflective coating on first reflective surface, Penta Prism can be used as Beamsplitter. We supply Beamsplitter Penta Prism with standard Transmission/reflection (T/R) ratio of 20/80, 50/50. Others T/R ratio is available upon request.
Beamsplitter penta prism is a penta prism glued with a wedge on a reflecting surface. It is used to divide an incident beam into two separate beams: Transmission(T) and reflection(R). The image is neither inverted nor reversed. 
Material: BK7
Diameter Tolerance: ±0.2mm
Angular Tolerance: see the table as follow
Flatness: λ/2 | λ/4 @ 632.8nm
Surface Quality: 60/40
Reflectivity R>95% per face @400-700nm
T/R 20/80±5 or 50/50±5
Clear Aperture: >80%
Bevel: <0.25mm X 45°
Coating: * S1&S2&S5: Single layer MgF2 coating
* S3: Partial reflective coating
* S4: Aluminized and painted black

Size(mm)  30 Sec. Deviation  10 Sec. Deviation 
A x h  Part No.  Part No. 
7 x 6 BPP1-203 BPP1-303
10 x 10 BPP1-204 BPP1-304
15 x 15 BPP1-205 BPP1-305
20 x 20 BPP1-206 BPP1-306