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Arm
The curved part of the microscope that supports the tube and connects it to the base of the microscope.
Base
The bottom of the microscope.
Body Tube
The cylindrical tube that joins the objective lenses to the eyepiece. Also called the tube.
Coarse Focus Knob
Used for initial focusing on low power to visulaize the histology slide.
Compound Microscope
A microscope with a dual lens system: eyepiece lens and objective lenses.
Condenser Lens
Focuses the light onto the histology slide.
DIN Objectives
Deutsche Industrie Normen; international standard for microscope objectives.
Eyepiece Lens
This is the lens at the top of the microscope that is looked through to see the histology slide. Also called the ocular lens.
Fine Focus Knob
Used to bring the histology slide into focus.
Illuminator
An electrical light source.
Interpupillary Adjustment
The adjustment on a microscope to change the distance between the two eyepieces so that they match the viewer's interpupillary distance.
Interpupillary Distance
The distance between a person's pupils.
Iris Diaphragm
This controls the diameter of the cone of like, similar to the iris of the eye.
Objective Lens
The lenses which are nearest the histology slide. Typically come in magnifications of 4X, 10X, 40X and 100X.
Ocular Lens
This is the lens at the top of the microscope that is looked through. Also called the eyepiece lens.
Oil Immersion Lens
A lens that requires a drop of special oil on the slide.
Parfocal
Property of a microscope so that the histology slide stays in focus when the objectives are changed.
Revolving Nosepiece
Piece on the microscope that revolves which holds the objective lenses. Also call the turret.
Stage
The flat surface that the histology slide is put on.
Stage Clips
Metal clips that hold the histology slides in place on the stage.
Tube
The cylindrical tube that joins the objective lenses to the eyepiece. Also called the body tube.
Turret
Piece on the microscope that revolves which holds the objective lenses. Also call the revolving nosepiece.
Histology hint from Sarah Bellham: If you are studying histology or involved in health care, you need a medical dictionary. You may as well get one as early in your career as possible to maximize the benefit. I recommend: Stedman's Medical Dictionary or Dorland's Illustrated Medical Dictionary, 30th Edition .
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