| A | B |
|---|
| virtual image | an image that cannot be seen directly but can be seen only by a viewer looking through a lens |
| real image | an image that can be seen directly with the naked eye |
| objective lens | lower lens of a compound microscope that is positioned directly over the specimen |
| eyepiece lens | upper lens of a compound microscope into which the viewer looks |
| base | support that holds compound microscope |
| arm | attached to base supports lenses and acts as handle for carrying |
| stage | horizontal plate on which specimens are placed |
| body tube | hollow tube that connects objective and eyepiece lenses |
| coarse adjustment | focuses lenses usually by moving body tube or stage |
| fine adjustment | focuses lenses usually by moving body tube or stage but to a lesser degree than coarse adjustment |
| illuminator | light source used to make specimen visible |
| transmitted illumination | light source below transparent specimen |
| vertical illumination | light source above an opaque specimen |
| condensor | lens system below specimen that is used to control amount of light sent up through specimen |
| parfocal | designates that microscope focused under one objective will be very nearly in focus ubder any other objective |
| monocular microscope | possesses only one eyepiece lens |
| binocular microscope | possesses two eyepiece lenses |
| field of view | area of specimen that can be seen after it is magnified |
| depth of focus | thickness of a specimen that is entirely in focus under a microscope |
| comparison microscope | two independent sets of objective lenses joinded together by an optical bridge |
| stereoscopic microscope | produces 3D images of opaque specimens |
| polarizing microscope | uses polarized light to visualize specimens without need of dyes/stains |
| polarizer | device that permits passage of light waves vibrating in only one plane |
| plane-polarized light | light configured in a single plane of vibration |
| microspectrophometer | instrument that links a microscope to a spectrophotomter |
| scanning electron microscope (SEM) | produces highly magnified images using electrons that have been scattered off of the surface of a specimen |
