Artifex Engineering manufactures Glan type polarizers that have a compact design. These prism polarizers are made of two similar birefringent material prisms which are constructed with an air space. They feature a length to apertures ratio of less than 1.0 making them comparatively thin polarizers in contrast to other polarizers available in the market. They are suitable for low to medium application where the side rejected beams are not necessary as they feature no side escape windows.