Editing Microscope (section)

===X-ray microscopes===
{{main|X-ray microscope}}
X-ray microscopes are instruments that use electromagnetic radiation usually in the soft X-ray band to image objects. Technological advances in X-ray lens optics in the early 1970s made the instrument a viable imaging choice.<ref name="Erko">{{cite book|last1=Erko|first1=A.|title=Modern developments in X-ray and neutron optics|date=2008|publisher=Springer|location=Berlin|isbn=978-3-540-74561-7}}</ref> They are often used in tomography (see [[X-ray microtomography|micro-computed tomography]]) to produce three dimensional images of objects, including biological materials that have not been chemically fixed. Currently research is being done to improve optics for hard X-rays which have greater penetrating power.<ref name="Erko" />