In this high precision slit system a flexure mechanism is used to move the slit blades over a small range while maintaining a high level of parallelism. Optional items include manual or stepper motor driven operation, a linear encoder to indicate aperture position, feedthroughs to enable measurement of the photo-current from each blade for beam position and intensity monitoring, a motorised stage for longitudinal positioning of the slit, and mounting on a synthetic granite plinth.
| Uncooled precision slit | BSP0100 | Range of slit aperture | 2 – 500μm |
| Stepper motor drive for precision slit | BSP0102 | Slit blade width | 25mm |
| Position encoder for precision slit | BSP0103 | Aperture resolution | 0.5μm |
| Aperture parallelism and stability | <10% of slit width to a minimum of 2μm | ||
| Knife edge straightness | 1μm |