Alexandros A Lavdas

Alexandros A Lavdas received his MSc and PhD from UCL, where he studied the development of the cerebral cortex. He has since worked as a postdoctoral Fellow at UCL, deciphering the origin of GABAergic neurons in the rodent cortex, and the Hellenic Pasteur Institute, where he also worked as Researcher/Assistant Professor for a number of years, studying models of cell replacement therapy for CNS and PNS trauma. He has also spent shorter periods in Scripps, San Diego and the Pasteur Institute in Paris. He is currently a Senior Researcher at the European Academy in Bolzano, setting up the new state-of-the-art microscopy facility and beginning to work on cellular models of Parkinson’s disease.

Articles by Alexandros A Lavdas:

Structured Illumination Microscopy (SIM) – An Introduction

The Moiré effect Here is a quick age test: do you remember when TV presenters wore ties that seemed to create funny patterns on the screen? Well, if you have seen this, you already know something about the principles of SIM. Presenters and producers have been more conscious about this for the last several decades,…

23 Nov 2017 Microscopy and Imaging

Lasers for Confocal Microscopy: Part II

Continuing from our first article on lasers for confocal microscopy, we will now discuss two specialized types of lasers: lasers for two-photon excitation and tunable, white light lasers. We will also discuss the applications of the two lasers. Lasers for Two-Photon Excitation The two-photon absorption phenomenon was first described for microscopy in 1931. Here, the…

24 Oct 2017 Microscopy and Imaging

Lasers for Confocal Microscopy

Lasers were once called “a solution looking for a problem.” The word—which is an acronym for Light Amplification by Stimulated Emission of Radiation—used to conjure up images of deadly weapons from Sci-Fi movies and TV series. However, their increasing use in everyday life, first in CD players and then in barcode scanners and pointers, have…

07 Sep 2016 Microscopy and Imaging

Resolving your Noise Complaints – the Basics of Signal/Noise Ratio in Microscopy

The resolution of any microscope is related to the numerical aperture of the lens and the wavelength of light used to form the image, and can be calculated using Abbe’s law (read more about Abbe’s law here). This, however, is the ideal situation – the best case scenario. In real life, resolution must be defined…

09 Jul 2016 Microscopy and Imaging

Brightness and Contrast in Microscopy Imaging

The concepts of brightness and contrast are so general, and the issues related to them so many, that it may seem strange to have a single brief article with such a title. Indeed, when we speak about brightness, we can think about the brightness of the light source, the aperture and magnification of the lens,…

09 Jul 2016 Microscopy and Imaging