Kore Components: Cassegrain Lens
Reflecting Optics Lens

Cassegrain Optics

Kore manufactures a Cassegrain optics that is unique because it has a high numerical aperture, an all-metal construction, is ultra-high vacuum compatible, and is designed for extraction of ions from near the optical focus.


This all-metal reflecting optics lens was originally designed as a long working distance, in-vacuum, on-axis lens yielding sub-micron diameter spot sizes for laser microprobe mass analysers. The Cassegrain design has zero chromatic aberration, so that any wavelength can be focused or viewed through the lens.


The lens is constructed by polishing the reflective surfaces directly onto stainless-steel, which is normally then coated with aluminium and magnesium chloride to enhance ultra-violet reflection. However, alternative coatings for other wavelengths can be applied upon request. The all-metal construction means high power laser intensities can be used and also allows the structure to be baked for outgassing in an ultra-high vacuum environment.


Focal Length9.5 mm
Numerical Aperture0.33

Kore Technology is a centre of excellence in time-of-flight mass spectrometer technology and has a very strong R&D capability in terms of its personnel, all of whom have been heavily involved in a variety of analytical instrumentation development programmes.


If you have any questions please feel free to contact us via our online form or telephone us for more information, we offer a wide range of products and services to suit your requirements.


If you wish to purchase our products, please contact Kore sales at sales@kore.co.uk, or call +44 (0)1353 653030.

contact us