Scanning electron<unk>  image of pollen<unk> c examination in a biochemical laboratory<unk>  is the technical field of using<unk> s to view objects and areas of objects that cannot be seen with the naked eye (objects that are not within the resolution range of the normal eye). There are three well-known branches of<unk> : optical, electron, and scanning probe<unk> , along with the emerging field of X-ray<unk> . Optical<unk>  and electron<unk>  involve the diffraction, reflection, or refraction of electromagnetic radiation/electron beams interacting with the specimen, and the collection of the scattered radiation or another signal in order to create an image. This process may be carried out by wide-field irradiation of the sample (for example standard light<unk>  and transmission electron<unk>  or by scanning a fine beam over the sample (for example confocal laser scanning<unk>  and scanning electron<unk> . Scanning probe<unk>  involves the interaction of a scanning probe with the surface of the object of interest. The development of<unk>  revolutionized biology, gave rise to the field of histology and so remains an essential technique in the life and physical sciences. X-ray<unk>  is three-dimensional and non-destructive, allowing for repeated imaging of the same sample for in situ or 4D studies, and providing the ability to "see inside" the sample being studied before sacrificing it to higher resolution techniques. A 3D X-ray<unk>  uses the technique of computed tomography <unk> roCT), rotating the sample 360 degrees and reconstructing the images. CT is typically carried out with a flat panel display. A 3D X-ray<unk>  employs a range of objectives, e.g., from 4X to 40X, and can also include a flat panel.
Microscopy
H&E stain
HPS stain
Giemsa stain
Cyto-Stain
Leishman stain
Dermatopathology
Mycology