Newport MKS Spatial Filter, Three-Axis 900

The 900 Three Axis Spatial Filter is an elegantly simple device featuring an accessible design with precision micrometer control over pinhole placement and objective lens focus. The pinhole mount is magnetically registered against the machined faces of the non-rotating X-Y adjustment spindles. A precision-machined slot in the pinhole mount mates repeatably to the spindle face, resisting accidental motion of the mount while permitting fine adjustment. Works With Most Objective Lenses The objective lens Z-axis motion is provided by a precision linear bearing, so that focus is found and maintained without jitter or side-play. The long-travel focus adjustment accommodates virtually any objective lens. The open architecture of this spatial filter makes it especially easy to change pinholes and objectives. Easy to Change Pinhole and Objective The open architecture of this spatial filter makes it especially easy to change pinholes and objectives. The pinhole mount is magnetically registered against the machined faces of the non-rotating X-Y adjustment spindles for easy installation and removal. Intuitive and Easy Alignment Spatial filter alignment is straightforward. Start by positioning the spatial filter assembly in the laser beam while observing the back reflections from the objective lens to bring both into alignment. To align the pinhole, first defocus the lens, then while observing the pinhole substrate, adjust the pinhole position until a faint light appears at the output. Alternate the lens Z-axis adjustment with X-Y pinhole position corrections until the best throughput and focus are achieved. This is indicated when a deliberate pinhole movement causes the symmetric output pattern to quickly disappear. A slow smear means a poor focus. Includes 25 µm Pinhole & 10x Objective Three-axis spatial filters come standard with a 25 µm high-energy ultra-thin molybdenum pinhole (900PH-25) pinhole and M-10X microscope objective. This pinhole and objective combination may not be correct for your particular application. Different objective lenses and mounted pinholes can be ordered separately. These spatial filters are designed to accommodate all M- and MV-Series Objective Lenses, the L-4X and L-50X Infinity-Corrected Objective Lenses, and 900PH-Series Mounted Pinholes.