Parts of a Compound Light Microscope Mirror Light

Mirror / Light • the light source for a microscope, typically located in the

Coarse adjustment knob • used to focus the microscope • You use it to

Fine adjustment knob • used to focus the microscope • This is the knob

Eye piece • The eyepiece or Ocular is what you look through at the

Nose piece • The part of the microscope that holds the objective lenses also

Objective lenses • The primary optical lenses on a microscope. • They range from

Stage clips • Holds the slide in place • The viewer is required to

Stage • where the specimen to be viewed is placed.

Diaphragm • controls the amount of light reaching the specimen.

Hooke's compound microscope • From "The Microscope and Its Revelations" Carpenter, 1891: image of

Leeuwenhoek's simple microscope • From "The Microscope and Its Revelations" Carpenter, 1891: images of

Today we will be looking at: • • • Salt crystals Wool fibers Cotton

D. Eye piece C. Course adjustment knob B. Fine adjustment knob E. Nose G.

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Parts of a Compound Light Microscope

Mirror / Light • the light source for a microscope, typically located in the base of the microscope. • Most light microscopes use low voltage, halogen bulbs with continuous variable lighting control located within the base.

A. Mirror / Light

Coarse adjustment knob • used to focus the microscope • You use it to move the objective lenses toward or away from the specimen.

C. Course adjustment knob

Fine adjustment knob • used to focus the microscope • This is the knob used to fine tune the focus on the specimen. • It is also used to focus on various parts of the specimen. • Generally one uses the coarse focus first to get close then moves to the fine focus knob for fine tuning.

B. Fine adjustment knob

Eye piece • The eyepiece or Ocular is what you look through at the top of the microscope. • Most eyepieces have a magnifying power of 10 x.

D. Eye piece

Nose piece • The part of the microscope that holds the objective lenses also called a revolving nosepiece or turret. • The objectives are exposed and are mounted so that different objectives can be selected. • Standard objectives include 4 x, 10 x, 40 x and 100 x.

F. Nose

Objective lenses • The primary optical lenses on a microscope. • They range from 4 x-100 x and typically, include, three, four or five on lens on most microscopes.

G. Objective lenses

Stage clips • Holds the slide in place • The viewer is required to move the slide manually to view different sections of the specimen.

H. Stage Clips

Stage • where the specimen to be viewed is placed.

I. Stage

Diaphragm • controls the amount of light reaching the specimen.

J. Diaphragm

Hooke's compound microscope • From "The Microscope and Its Revelations" Carpenter, 1891: image of Hooke's compound microscope 1665

Leeuwenhoek's simple microscope • From "The Microscope and Its Revelations" Carpenter, 1891: images of Leeuwenhoek's simple microscope

Today we will be looking at: • • • Salt crystals Wool fibers Cotton fibers The letter “e” Dust Volcanic ash colored thread newspaper print nylon fibers cork silk fibers corn starch • You will select 5 to practice focusing & drawing (in color) under all three powers

D. Eye piece C. Course adjustment knob B. Fine adjustment knob E. Nose G. Objective lenses H. Stage Clips I. Stage A. Mirror / Light J. Diaphragm