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18 Cards in this Set
- Front
- Back
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Base: Bottom of microscope. Provides a sturdy flat surface to support and steady the microscope |
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Substage Light: Light passes directly up through the microscope |
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Stage: platform where slide rests while being viewed. |
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Condenser: Small non-magnifying lens, concentrates light on specimen |
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Iris Diaphragm Lever: Shutter in the condenser controls amount of light pass-through. |
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Course Adjustment Knob: Of the two knobs on the side of a microscope, it is the largest. It is used to focus on the specimen; it may move either the stage or the upper part of the microscope (in a relative up and down motion). |
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fine adjustment knob: small, round knob on the side of the microscope. used to fine-tune the focus of your specimen after using the coarse adjustment knob |
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Head body tube: Houses the lenses and the mirror |
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ARM: Connects body tube to the base. |
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Ocular: Magnifies specimen additional 10x. Is adjustable. One usually contains a pointer. |
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Nosepiece: Revolving structure, houses objectives, used to move objectives |
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Objective Lenses: Maginifies Specimen specific amount indicatted on the objective. |
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Term: Total Magnification: |
To get the total magnification take the power of the objective (4X, 10X, 40x) and multiply by the power of the eyepiece, 10X. |
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Term: Resolution: |
The resolution of an optical microscope is defined as the smallest distance between two points on a specimen that can still be distinguished as two separate entities. |
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Term: Feild of view |
the diameter of the circle of light that you see when looking into a microscope |
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Term: Work Distance |
the distance from the front lens element of the objective to the closest surface of the coverslip when the specimen is in sharp focus. |
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Term: Parafocal |
Objectives stay in focus when magnification is changed |
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Term: Depth of feild |
the range of distance in front of and behind an object focused by an optical instrument |
