FUNCTION:  For demonstration of organisms that are hard to visualize in bright microscope.  Example: bacteria that causes syphilis and Leptospirosis.

Created the first microscope

Gathers and focuses light from the illuminator onto the specimen being viewed.

Microscope 3 Tasks:

These knobs move the stage left and right or up and down.

make objects stand out from the background.

to visualize the tissue biopsies, cytological specimens and gynecological specimens

Produce a magnified image of the specimen

The flat platform where the slide is placed.

connects the eyepiece to the objective lenses

Useful as a means to change focus on one eyepiece so as to correct for any difference in vision between your two eyes

is used to move the stage up and down to bring the specimen into rough focus

A rotating turret that houses the objective lenses. The viewer spins the nosepiece to select different objective lenses.

Metal clips that hold the slide in place

Adjusts the amount of light that reaches the specimen.

To visualize bacteria, fungi, parasites and even viruses.

Separate the details in the image

This switch on the base of the microscope turns the illuminator off and on

The lens the viewer looks through to see the specimen.  usually contains a 10X or 15X power lens.

ability of lenses to separate closely distant objects

The hole in the middle of the stage that allows light from the illuminator to reach the specimen

is used for finer focusing.

to visualize the cells in the blood, BM, lymph, and other body fluids

BRIGHT IMAGE AGAINST DARK BACKGROUND

considered to be the first microscope.

Render the details visible to the eye, camera, or other imaging device.

the extent to which detail in the magnified objects are maintained

connects the body tube to the base of the microscope

to retain focus when objective lens is changed.

is the object being examined.

Instrument design to make fine details visible

This is the part of the microscope that holds two or more objective lenses and can be rotated to easily change power (magnification)

Brings the specimen into general focus

is the technical field of using microscopes to view samples & objects that cannot be seen with the unaided eye (objects that are not within the resolution range of the normal eye).

DARK IMAGE AGAINST BRIGHT BACKGROUND.

THREE CATEGORIES OF COMPONENTS OF MICROSCOPE

supports the microscope and it’s where illuminator is located.

Types of Microscope

Fine tunes the focus and increases the detail of the specimen.

The light source for a 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

to maintain the focus at the center from the previous lens to another objective lens.

PRINCIPLE: Light source provides the light that aims into the specimen in stage. Stains absorb the light and this contrast allows the viewer to view the specimen.

an instrument that magnifies an image and allows visualization of greater detail than is possible with the unaided eye

measure of relative velocity at which light passes through.

These are used to adjust the focus of the microscope.