By adding a wedge and with partial reflective coating, Penta Prism can be used as Beamsplitter.     

It is often used in Plumb Level, Surveying, Alignment, Rangefinding and Optical Tooling.      

Transmission/reflection (T/R) ratio of 20/80, 50/50 or others for Beamsplitter Penta Prism is available upon request.    

Specifications    

 Material: BK7 Grade A optical glass    
 Dimension Tolerance: +/- 0.25 mm      
 90°, 180°Deviation Tolerance:    
 Standard series: < 30 arc seconds     
 Precision series: up to 15 arc seconds       
 Flatness:     
 Standard series: λ/2 at 632.8 nm    
 Precision series: up to λ/4 at 632.8 nm     
 Surface Quality: 60-40 scratch and dig     
 Beamsplitter Ratio T/R: @ 630-680nm, T/R: 20/80 ±5