Microscope Parts

Diaphragm/Aperture diaphragm control

regulates/controls the amount of light

Field diaphragm lever

Opens and closes to increase and decrease light

Body Tube

located between the eyepiece and the nosepiece, separates the lenses

Stage

slide goes here

Stage Clips

holds the slide in place on the stage

Base

bottom of the microscope, used to carry the microscope

Light Source

gives us light to enable us to see the specimen on the slide

Arm

used in order to carry the microscope

Coarse Adjustment Knob

allows for quick focusing by moving the objective lens or stage up and down. **NOT used when in high power

Fine Adjustment Knob

A slow but precise control used to fine focus the image when viewing at the higher magnifications

Ocular lens

used to view an object under the microscope, has a power of 10X

Nosepiece

Holds and rotates the objectives

Substage condenser

Two lenses that focus light and improve sharpness.

Stage adjustment knobs

Control the stage's movement. Left to right and top to bottom.

Light intensity control

Decreases or increases light output from light source.

Power of only the low power objective lens

4x

Hold the microscope by the .....

arm and base.

low power objective

magnifies about 10x

high power objective

magnifies about 40x

total magnification

ocular lens x objective lens

Resolution

the ability of the lenses to distinguish two points that are close

Parafocal lens

Maintain specimen focus as objective powers are switched

Magnification

An increase in the apparent size of an object

Depth of field

Thickness of plane of focus