Compound Microscope Flashcards
an essential tool in the study of the fine structure of plants and animals
microscope
made up of a system of lenses that can invert images
compound microscope
3 major parts of the microscope
- Mechanical Parts
- Illuminating Parts
- Magnifying Parts
the tubular, upright portion attached at the top of the arm; this is where the ordinary eyepiece or ocular is inserted
Draw Tube
found immediately below the draw tube that serves as connection between the ocular inside the draw tube and the objectives found at the other end of the body tube
Body Tube
the carrier of optical parts of the microscope
Body Tube
located at the lower end of the body tube serving for attachment of objectives that facilitate the shift from one objective to another
Revolving Nosepiece
dark metallic disc located just above the revolving nosepiece used to prevent dust from entering the objectives
Dust Shield
the C-shaped pillar rising from the stage or base used for carrying the microscope
Arm or Handle
the flat platform attached to the arm where the glass slide containing the specimen is placed
Stage
found on stage used for securing the slide in position
Spring Clips
located immediately below the stage containing the diaphragm and the Abbe condenser
Sub-stage
the large wheel with milled edges used along with the Low Power Objective for locating the outline of the specimen
Coarse Adjustment Knob
the smaller wheel with milled edges used to see the finer detail of the object
Fine Adjustment Knob
rotation movement of Coarse Adjustment Knob
upward or downward
located between the pillar and the arm and enables one to tilt the upper part of the microscope to a desired position for convenience
Inclination Joint
a very short connection between the base and the rest of the microscope
Pillar
can be tilt to desired angle of position
Pillar
the U-shaped or horse-shoe shape iron portion on which the microscope rests
Base
It supports the entire apparatus.
Base
major part controlling the light entering the microscope
The Illuminating Parts
located below the stage used to catch the light and direct it to the object being studied
Mirror
mirror used under natural light
flat or plane surface mirror
mirror used under artificial light
concave mirror
with a small lever at one side of the condenser which opens and closes a screen of metal plates
Iris Diaphragm
used to regulate the amount of light entering the microscope
Iris Diaphragm
used to concentrate or focus the light coming from the diaphragm to the object found on the stage
Abbe Condenser
major part used for Enlargement of Objects
The Magnifying Parts
contains lenses (eye lens and field lens)
Ocular or Eyepiece
small tubes containing lenses screwed into the nosepiece which magnify the object being examined
Objectives
the shortest tube stamped 10x affording the lowest ocular magnification
Low Power Objective (LPO)
the longer tube marked either 40x (most used), 43x, sometimes 45x
High Power Objective (HPO)
objective that have same length as the high-power objective but affording a much higher magnification being stamped 95x, 97x or 100x
Oil Immersion
may be defined as the number of times an object is enlarged by the magnifying lens or the number of times a drawing is enlarged from the original size of the object
Magnification
general formula of magnification
MAGNIFICATION = Magnifying power of objective X Magnifying power of eyepiece
