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A&P Lab Chapter 3

Terms

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copy deck
Arm
Vertical portion of the microscope connecting the base and head
Base
Supports the microscope
Coarse adjustment knob
Used to focus on the specimen
Condenser
Small substage lens that concentrates the light on the specimen.  
Depth of field
The depth of the specimen clearly in focus; greater at lower magnifications
Fine adjustment knob
Used for precise focusing once coarse focusing has been completed
Head/body tube
Supports the objective lens system which is mounted on the movable nosepiece.
Iris diaphragm lever
Arm attached to the base of the condenser that regulates the amount of light passing through the condenser.  
Objective lenses 
Adjustable lens system that permits the use of:
-Scanning lens (4x)
-Low/medium-power lens (10x)
-High-power lens (40x)
-Oil immersion lens (100x)
Ocular (nosepiece)
Ocular - one or two lenses at the superior end of the head or body tube.  Observations are made through the oculars.  Has a magnification of 10X.

Nosepiece - rotating mechanism at the base of the head.  
Parfocal
When the slide is in focus (or nearly so) at the higher magnifications once properly focused in the scanning/low-power objective lense(s)
Stage
The platform the slide rests on while being viewed.  The stage has a hole in it to permit light to pass through both it andthe specimen.

Stage holder - holds specimen in place for viewing.
The stage has 2 knobs that con
Susstage light
Or mirror
Located in the base.  The light passes directly upward through the microscope: light controls are located on the microscope base
Total magnification
(TM) of any specimen being viewed:
-The power of the ocular lens multiplied by the power of the objective lens used.
-Scanning lens TM: 40x
-Low/medium-power lens TM: 100x
-High-power lens TM: 400x
-Oil immersio
Working distance
Distance between the bottom of the objective lens and the specimen

Deck Info

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