Dr Andrew Maiden

EEE Staff Dr A Maiden

Contact Details


Tel: +44 (0)114 22 25181

ORCHID: 0000-0002-8192-8235


  • PhD, University of Durham 2005
  • MEng (Electronic & Electrical Engineering), University of Birmingham 2001

Research Activities

  • Coherent Diffractive Imaging (CDI)
  • Ptychography
  • Computer-generated holography
  • Phase imaging in the Transmission Electron Microscope (TEM)
  • Inverse problems
  • Image processing


  • Lecturer
  • Teaching: EE335 (integrated electronics) and EEE6231 (optical imaging systems)
  • Postgraduate Research Admissions Tutor

I’m interested in computational optics – enhancing optical systems such as microscopes, cameras or projectors with computer code.

My interest began with my PhD at Durham University, where I used computer modelling of the way light propagates to design digital holograms. The holograms were printed out and projected a 3D pattern of circuitry when illuminated with a laser. We used these projected patterns to expose photoresist for the manufacture of volumetric integrated circuits and 3D antennas.

I spent a year living in the Lake District (where I grew up) after my PhD. I got to indulge my passion for outdoor sports – rock climbing, fell running and triathlon – whilst I was there, so when I decided to return to academia Sheffield was a natural choice, being a very outdoors city with excellent Universities.
I moved to Sheffield to work with Prof. John Rodenburg and was lucky enough to join him in the pioneering days of a computational optics technique called ptychography (pronounced tie-cog- ra-fee).
Ptychography uses diffraction pattern measurements to enhance microscopes. It realises ‘perfect’ imaging, where the image of a microscopic specimen it recreates is an exact copy of how that specimen
interacts with a beam of light.

I left Sheffield University for a brief spell to work with a spin-out company on commercialisation of ptychography-enhanced microscopes. I missed the freedom of the academic environment, and returned as a Lecturer after a couple of years. As well as my continuing research in computational optics, I now teach analogue electronics to our third years and a hands-on module in optical imaging systems as part of our new two year MSc programme in Bioengineering: Imaging and sensing. I’m also the PhD Admissions Tutor for our Department, so if you’re interested in coming to Sheffield to continue your studies, please get in touch.

Research Students

Student Degree Status Primary/Secondary
Cao S PhD Graduated Secondary