lesson 1 Flashcards
WHAT IS MICROSCOPE?
Magnify small objects, Produces enlarged images
of small objects, Microscopium (micro (small) + skopium (to look or see)
WHO COINED THE WORD MICROSCOPE ?
JOHANNES GIOVANNI FABER
WHO INVENTED THE MICROSCOPE?
zacharias janssen
It is the lens the viewer looks through to see the specimen. The eyepiece usually contains a 10X or 15X power lens
Eyepiece
is the ability to make things appear larger than they are.
MAGNIFICATION
One of the most important parts of a compound microscope, as they are the lenses closest to the specimen. A standard microscope has three, four, or five objective lenses that range in power from4Xto100X.When focusing the microscope, be careful that the objective lens doesn’t touch the slide, as it could break the slide and destroy the specimen.
objective lenses
Type of Objective Lens
- Scanning Objective Lens (red line)- 4x
- Low Power Objective Lens (yellow line)- 10x
- High Power Objective Lens (blue line)- 40x
- Oil Immersion Objective Lens (white line)- 100
metal clips that hold the slide in place.
Stage clips
the flat platform where the slide is placed
. Mechanical Stage -
gathers and focuses light from the illuminator onto the specimen being viewed
Condenser-
- fine tunes the focus and increases the detail of the specimen
Fine Adjustment Knob
- the light source
Illuminator
supports the microscope and it’s where illuminator is located.
base
Useful as a means to change focus on one eyepiece so as to correct for any difference invisionbetweenyour two eyes
Diopter Adjustment Knob
it carries the optical parts in the upper part of the microscope.
. Head
. - screw that tightens and prevents the head from swiveling
Head Locking Screw
.
-A rotating turret that houses the objective lenses. The viewer spins the nosepiece toselect differentobjective lenses
Nosepiece
connects the body tube to the base of the microscope
Arm-
- brings the specimen into general focus
Coarse Adjustment Knob
-the hole in the middle of the stage that allows light from the illuminator to reach the specimen.
. Aperture
.-adjusts the amount of light that reaches the specimen.
Iris diaphragm-
these knobs move the stage left and right or up and down.
Stage Control Knobs-
- adjusts the amount of light for the microscope. Older microscopes used mirrors to reflect light from an external source up through the bottom of the stage; however, most microscopes now use a low-voltage bulb.
Illuminator Adjustment Wheel
