Microscopes at microscopic size

From the press release by UK’s Biotechnology and Biological Sciences Research Council:

Traditionally if scientists wanted to look at something small they would put a sample under a microscope but now researchers have managed to shrink the microscope itself to the size of a single human cell. An interdisciplinary research team, funded by the Biotechnology and Biological Science Research Council (BBSRC) and the Engineering and Physical Sciences Research Council (EPSRC) have developed optical biochips no larger than a single cell that could lead to faster development of new drugs and quicker medical tests.
The research team moved away from the idea that a microscope is something you have to look through to create optical biochips onto which scientists can place biological samples. Special fluorescent chemicals are then used together with tiny light emitting lasers to allow the scientists to analyse the cells or targets within the cells. Researchers can use this capability to examine cellular conditions for certain diseases or to develop new treatments by studying the way cells react to a drug.
The biochips also raise the possibility of a micro-laboratory, the size of a credit card, which would be able to perform medical diagnostics, improving patient treatment by reducing the number of hospital visits needed for tests.
The initial research has led to the creation of a spin-out company, BioStatus Ltd, supported by a BBSRC Small Business Research Initiative grant.

More at the BBC News…
BioStatus company website…