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Definition
| invented by Ernest Abbe, German physicist, contains 2 lens elements, with the top one being removable for low power obeservation or photography |
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| objectives designed to bring the red and blue parts of the visible light spectrum into the same focus while bringing green and other colors into a shorter focus |
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| the main vertical section supporting the microscope |
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| coaxial coarse and fine focus |
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Definition
| having both operate on a single axis, so knobs are concentric (coarse is larger) |
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| coarse focus adjustment knob |
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Definition
| control used to move the stage up and down. used 99% of the time |
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| instrument fitted with objective and ocular (eyepiece) lenses and used for viewing small objects |
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| mirror, lens or combo of lenses located under the microscope stage; used to gather light on the object |
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Definition
| vertical distance that can sharply focus on a specimen. as mag. power increases,depth of field decreases |
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| disc with 5 or 6 different sized holes fitted under stage. when turned, the holes open on the stage for light it controls the amount of light that passes up. |
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Definition
| lens system closest to eye. |
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| area visible thru microscope. as power increases, filed of view decreases |
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Definition
| lens system closest to eye. |
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Definition
| area visible thru microscope. as power increases, filed of view decreases |
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| device under microscopestage that uses a series of metal leaves that work together to control the opening size through which light passes thru the condenser |
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Definition
| number of x's that a microscopic image appears larger than orignal |
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| device to hold speciman closer to view |
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Definition
| rotating device that holds lens |
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Definition
| lens closest to object w/o mag. |
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Definition
| lens system used for high mag |
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| lenses that remain in focus when mag is changed |
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| ability of a lens to distinguish |
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| eyepiece with an entrance lens larger than most. lends itself to varying eyepoint requirements |
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Definition
| the dist. btwn the front end of objective and the specimen, when in sharp focus |
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