The SV60 stress viewer is a medium aperture test device for checking stress in visually transparent optical components, especially those made using ZnSe. Stress from physical damage, incorrect mounting and high intensity radiation can cause non-reversible stress in the lens material. Stress shows up as birefringence, which can be seen when the component is viewed between two crossed polarizers and illuminated with visible light. Stress birefringence reduces the performance of an optic.
Lenses that are stressed by the mount may spring back when removed from the mount. In this situation small permanent stress crosses will be visible around the lens edge indicating that the lens was under severe stress when mounted.
The SV60 illuminates the test lens from below and is viewed through a magnifying lens which provides greater details of the stress. An opal screen below the lower polarizer provides uniform lighting. The SV60 is supplied with a 1.5 and a 2.0 lens holder. Mounted lenses can also be viewed.
245 mm x 100 mm x 120 mm (HxWxD)
Aluminum alloy, black anodized
60 mm diameter
240 V or 110 V, must be specified upon ordering
Lower is fixed Upper rotates
Opal screen below lower polarizer
ULO Optics is an ISO certified company and quality is at the heart of everything we do. With a host of industrial affiliations you can rely on ULO to deliver.
Beam Expanders for 1μm lasers
ULO Optics are excited to introduce our new range of beamexpanders. Designed for low power (500w) lasers such as Nd:YAG and Yb doped fibre lasers operating near the 1μm wavelength. The beamexpanders are of Galillean design and use Multi-spectral Zinc Sulphide for the optics which has an absorption at 1μm of 0.0005cm−1 (Similar to ZnSe at 10.6μm).
Diversification into 1 micron optics
ULO Collaborate on the LaserSnake2 project, developing laser cutting optics for safe, remote cutting in air and in water, focused on nuclear decommissioning.
ULO Optics develops CO2 Brewster plate beamcombiner
In our new beamcombiner – C-BC-2, pairs of enhanced Brewster Windows are used to attenuate a linearly polarised CO2 laser beam. The Brewster plate acts like a polarising beamsplitter. The difference in reflectance also allows two perpendicular polarised beams to be combined into a single beam.