THE COMPOUND MICROSCOPE Flashcards
indispensable tool
enables us to see plant structures too small to be seen by the unaided eye
microscope
three elements are needed to form an image
a source of illumination
the specimen to be observed
a system of lenses to focus the illumination on the specimen and to form the image
microscope that uses natural or artificial light and series of lenses
compound light microscope
series of lenses in compound light microscope (4)
condenser
objectives
intermediate lenses
ocular lens
magnifies and projects virtual image into the body tube
objective lens
while the _____ magnifies that image further and projects the enlarged image into the eye
ocular lens
three basic parts of the microscope
(a) mechanical parts
(b) magnifying parts
(c) illuminating parts
those parts concerned with the support and adjustment of the optical parts
Mechanical Parts
Mechanical Parts (11)
- Base
- Pillar
- Handle or Arm
- Inclination Screw
- Body Tube
- Ocular Tube
- Revolving Nosepiece
- Dust Shield
- Adjustment Screws
a. Coarse Adjustment Screw
b. Fine Adjustment Screw - Stage
- Mirror Rack
those parts concerned with image enlargement of the specimen
Magnifying Parts
Magnifying Parts (2)
- Ocular or Eyepiece
- Objectives
a. Scanner
b.Low Power Objective (LPO)
c. High Power Objective (HPO)
d. Oil Immersion Objective
those parts concerned with light provision and regulation to the specimen
Illuminating Parts
those parts concerned with light provision and regulation to the specimen
Illuminating Parts
Illuminating Parts (3)
- Mirror
- Diaphragm
- Condenser
stand that supports the microscope.
Base
a short piece of metal that attaches to one end of the base; also supports the microscope.
Pillar
curved metallic part arising from the pillar used for holding the microscope
arm or handle
found at the junction of the pillar and the handle used for tilting the microscope
Inclination Screw
cylindrical structure vertically arising from the handle; holds the dust shield and nosepiece
Body Tube
upper smaller end of the body tube bearing the eyepiece or ocular lens.
Ocular Tube or Draw Tube
circular structure where the objectives are attached that permits the shifting of objectives
Revolving Nosepiece
circular structure above the nosepiece used to protect the lenses of the objectives
Dust Shield
two pairs of wheels attached to either side of the body tube.
Adjustment Screws
used to adjust the low power objective in focusing
Coarse Adjustment Screw
used for delicate focusing in connection with the high power and oil immersion objectives
Fine Adjustment Screw
A square or round platform with an opening at the center where the slide is placed
Stage
A square or round platform with an opening at the center where the slide is placed
Mirror Rack
found on the draw tube through which the operator peeps during actual focusing; usually carries magnification of 10X
Ocular or Eyepiece
A thin, black line that appears to cut halfway across the field of view which the student or instructor can use to point out regions of the specimen under observation
pointer
tube-like structures attached to the revolving nosepiece
objective
a. Scanner
b.Low Power Objective (LPO)
c. High Power Objective (HPO)
d. Oil Immersion Objective
carries a magnification of 4-5X.
carries a magnification of 10-12X.
carries a magnification of 40-60X.
carries a magnification of 97-100x; requires the use of cedar oil.
found below the stage near the base used to collect and direct light to the specimen.
Mirror
found below the stage used to regulate the entry of light onto the specimen. There are different types of diaphragm: iris, plate or fan
Diaphragm
lens found immediately beneath the hole of the stage used to concentrate light rays on the specimen
Condenser
