McPherson VUVAS UV spectrophotometers

McPherson offers deep and vacuum ultraviolet (VUV) wavelength spectral test systems. The instruments are suitable for analysing doped crystalline materials, deep UV optics and coatings. They directly measure absolute transmission and variable angle reflectance.

A gas cell attachment is used for high-sensitivity absorption. The systems operate with inert gas environments, rather than high vacuum, for enhanced stability. A gas purge inhibits the formation of organic films from residual contaminants in evacuated systems, improving both lifetime and stability.

When high repeatability is required over weeks or months, the McPherson purged VUVAS is a suitable metrology tool. For spectroscopy or quality control measurements that demand fast cycle times, vacuum systems may still be preferable. McPherson CCD-VUVAS systems achieve fast acquisition times on the order of 20 ms.

The VUVAS spectrophotometers are available for long-life purged or vacuum operation. Some systems are available with both options, allowing users to select the operational mode for the application at hand. The long-life systems enable research and quality control measurements of diverse samples to wavelengths as short as 120 nm. The dedicated software package controls the instrument and is easy to use.

The spectrophotometer provides a powerful tool for direct optical measurements from 120 to 350 nm. Users can specify the wavelength range and wavelength increments with software commands. Hardware homing ensures calibrated performance over time for reliable spectral data in the deep UV.

Applications include optical characterisation (transmission, reflection, VUV absorbance); spectral characterisation (coatings, filters, photocathodes); calibration and metrology; semiconductor manufacturing; photonics components manufacturing. Accessories such as light sources, detectors and flow cells are optionally available.