Parts and function Flashcards
One or more lenses that makes an enlarged image of an object
Microscope
What are the four types of microscope
- Simple
- Compound
- Stereoscopic
- Electron
• Similar to a magnifying glass and has
only one lens.
Simple Microscope
• Lets light pass through an object and
then through two or more lenses.
Compound Microscope
• Gives a three dimensional view of an
object. (Examples: insects and leaves)
Stereoscopic Microscope
• Uses a magnetic field to bend beams of electrons instead of using
lenses to bend beams of light.
Electron Microscope
—The part you
look at with your eye.
Usually 10 X magnification.
Eye Piece
– Used to safely
transport microscope
Arm
– Slides are
placed on this
Stage
–
Used to make large changes
in focus. NOTE Never use this
when viewing on high power
Coarse Adjustment
–
Used for small adjustments
of focus
Fine Adjustment
– Used to safely
transport the microscope
Base
– Reflects
light up to the viewers eye
Body Tube
– Allows for
quick change of objectives
Nose Piece
–
The first lens you use when
doing proper microscope
work. Usually 4 X
Low Power Objective
– The second
lens you use when doing
proper microscope work.
Usually 10 X
Medium Power
Objective
– The highest magnification used. Usually 43 X. NEVER use the course adjustment when using this lens.
High Power Objective
– Used to
keep the slide in place.
Stage Clips
– Used to vary the amount of light passing through the slide. Usually it is better if the amount of light is low.
Diaphragm
– Sends
light up through the
diaphragm and through the
slide for viewing
Light Source
To calculate the power of magnification, multiply the power of the ____ by the power of the ___.
ocular lens; objective
the part that extends upwards from the base to
support all other parts, and to hold the stage
Pillar
- the portion that allows tilting of the microscope at a desired angle
Inclination hinge or joint
- a small tube attached above the body tube wherein the ocular or the eyepiece is placed
Draw tube
- the wheels that raise or lower the tube
Adjustments
changes the elevation of the tube rapidly for preliminary focusing
coarse adjustment
-permits gradual changes in the elevation on the tube for final and accurate focusing
fine adjustment
- the circular disc above the resolving nosepiece to protect the objectives from dust particles
Dust shield
- carries the objectives, and turns them
-Revolving nosepiece
- a small tube consisting of lenses, that indicate the relative power of magnification
Ocular or eyepiece
-refer to the cylindrical tubes attached to the revolving nosepiece for initial magnification of the image
Objectives
-views the specimen in a larger field
Low Power Objective
-obtains greater magnification and views detailed structures of the specimen.
High Power Objective
- obtains greater magnification than HPO. In using this, a drop of oil is placed on the slide for better refraction.
Oil Immersion Objective
-it reflects light rays through the object. One side of the mirror is plain (used with ____); the other is ____ (used with artificial light)
Mirror
natural light; concave
- the part used primarily for focusing light rays upon the specimen.
Sub-stage
- made up of a number of thin pieces of metal operated by a lever used for regulating the amount of light necessary to obtain a clear view of the specimen.
Irish diaphragm
-lens or series of lenses mounted in substage attachment for the purpose of concentrating light upon the object to be examined. they are valuable with high power objectives and oil-immersion lenses.
Condenser
