Pinhole marker or Purkinje images of the microscope can be used to get a centrally located pupil and the pinhole pupil size to 1.5 mm. A pinhole marker (Figure 5) sized 1.5 mm is employed for gauging ...

While confocal microscopy uses a pinhole to reject out-of-focus light to generate the optical section, a multi-photon (or 2-photon) microscope uses a pulsed infrared laser to stimulate fluorescence ...

On most of the occasions that I write about microscopy, I talk about big table-top devices with fancy lasers attached to one end and fancy geeks attached to the other. Yet, in my excitement over these ...

Matin Durrani visits the National Institute of Standards and Technology in the US to find out how neutrons are being used to create a unique microscope that can see inside objects that other particles ...