Optical Security

Optical Security









The Electron Microscopy Laboratory offers a comprehensive service to support the optical security industry including product investigation and process optimisation. 

Optical security devices are everywhere in our everyday. Holographic images are used to protect security documents and other items. Initially they were first used to protect credit cards and due to dramatic improvements in holographic and optical image technologies they are used on software packaging, pharmaceuticals and brand protection.

These days "hologram" is used to describe any optical security image but these are really DOVID, or Diffractive Optical Variable Image Devices. All DOVIDs present an image which changes colours when tilted in various angles. In all cases, the DOVID arising from a microstructured surface which results in an interference pattern. The devices are usually reproduced on the surface of micro embossing shims using electro-forming processes. This is used to emboss directly onto polymer films or onto specialized coatings applied to polymer or paper webs.

The specialising imaging equipment in EMLab is ideally suited to evaluating these micro and nanostructured surfaces.

EMLab is able to provide a one-stop shop for optical security devices involving specialist facilities available in imaging, chemical characterisation and evaluation. The Lab offers expertise in the materials employed, the optimisation of the processing, fault finding and process control.

We are flexible in our approach and we will strive to understand your needs and problems and exceed your expectations. We are able to provide the specific microscopy element of a project or undertake a complete programme of work.

We are able to respond quickly where required and we are able to provide live access to some of the instrumentation to facilitate a rapid transfer of information.

EMLab has extensive experience working with large and small organisations within the UK, Europe and throughout the World. We are able to work on a confidential fee-for-service basis or in a collaborative programme as appropriate to your needs.

Please contact our specialist on recycling via emlab@reading.ac.uk or +44 118 378 6118 to discuss your needs.

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