In Situ Particle Viewer

Sub-mersible video Microscopes

About us

At the end of the last century, a PhD student at the University of Delft, The Netherlands, had a need for visualization of a crystallization process. He constructed with off-the-shellf components i.e. lens, camera, lightsource, framegrabber a relatively simple instrument, that did the job.

IMIX and Photontec picked up this idea and started to consult the potential users of such a device to know the requirements better. The top three most important features were:

  • Image quality
  • Rugged design
  • Accuracy of measurement

The first requirement imposes a design based on transmission light microscopy. Images of semi-transparent particles are of much higher quality, compared to reflection microscopy. Especially crystals with planar surface tend to either not reflect or totally reflect light, leading to poor image quality. The second requirement speaks for itself, but leads to tough constraints in engineering and production. The third requirement imposed to use telecentric lense design. The main feature of a telecentric lens is, that the size of an object does not change depending on the distance of the object to the lens.

In 2003 the first ISPV large probe based on these requirements was realized and tested at various laboratory and production locations. As a mutual committment and to focus, IMIX and Photontec founded a joint-venture, "Perdix Analytical Systems" and brought in the IP concerning the probe technology. However there seemed to be a demand for smaller probes suited for laboratory purposes. In 2008 the ISPV standard probe was realized and in cooperation with Avantium an add-on for their Crystalline was engineered.
The thee top most requirements are still today valid. Perdix is committed to realize probes and instruments, meeting these three requirements as good as possible and approaching the physical limits as close as possible.



IMIX was founded in 1991 as a spin-off from the University of Twente, The Netherlands. The core business is development and realization of advanced image/video processing and analysis. The technology is used in several owned applications but also licensed to OEM companies. The products and technology is sold world-wide. Within Perdix, IMIX is key in the development and implementation of the camera/electronics as well as the ISPV particle analysis software suite.



PhotonTec was founded in 1998 by Dr. J.W. Gerritsen. The core technology of PhotonTec is photonics. Within Perdix, PhotonTec is key in the development and implementation of the design and engineering of the optics and mechanics of the probes as well as the manufacturing.