In addition to the standard optical prisms, we at ZCQ are able to provide many special prisms, which include:
Assembled Prism, Porro Prism, Pechan Prism, Cuboid Prism & Custom made Prism etc.
Technical Specification of Pechan Prism, Porro Prism:
| Pechan Prism | Porro Prism | ||
| Dimension Tolerance | ±0.1 | Dimension Tolerance | ±0.1 |
| Flatness | λ-λ /4 | Flatness | λ-λ /4 |
| Surface Quality | 60/40- 40/20 | Surface Quality | 60/40- 40/20 |
| Angle Tolerance | ±3' | Angle Tolerance | ±3' |
| Side Vertical Angle | <10' | Side Vertical Angle | <10' |
| Pyramidal Error | <3' | Pyramidal Error | < 3' |
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