::::: Polariser Rotator APM - C Series Suitable for sheet polarisers. Coarse adjustment: 360 degree. Optics held by threaded ring inside a threaded bore of the device. More >>

::::: Precition Polariser Mounts APM-P Series Fine adjustment range: +/- 4 degree Fine adjustment drive: By micrometer heads / by 80 TPI leadscrews. Sensitivity: 20 arc sec. More >>