Penta prism
Description:
Penta prism can deviate an incident beam without inverting or reversing to 90°. It is commonly used in Plumb Level, Surveying, Alignment, Range finding and Optical Tooling. The reflecting surfaces of this Prism must be coated with a metallic or dielectric coating. The standard Penta Prism reflecting surfaces are coated with aluminum or enhanced aluminum.
Specifications:
| Material | BK7 Grade A optical glass or Fused Silica |
| Dimension Tolerance | ± 0.2mm |
| 90° Deviation Tolerance | < 30 arc seconds(Standard) |
| <10 arc seconds(High Precision) | |
| Flatness | λ/2 @ 633nm(Standard) |
| λ/4 @ 633 nm(High Precision) | |
| Reflectivity | R > 95% per face from 630 to 680 nm |
| Surface Quality | 60/40 scratch/dig |
| Coating | Upon customer’s request |