Bio 231 Microscope

base

bottom of microscope, used for support

Illuminator

steady light source, used in place of a mirror

stage

platform to place your slides

tube 

connects eyepiece to objective lens 

arm

supports the tube and connects it to the base.

used along with base to carry the microscope

Eyepiece lens

the lens at the top that you look through

usually 10x or 15x power

revolving nosepiece

holds two or more objective lenses and can be rotated to adjust power

objective lenses 

• 3-4 objective lenses on a microscope 

• lenses closest to the specimen 

rack stop

• adjustment that determines how close an objective lens can get to a slide

Diaphragm or iris

used to vary the intensity of the light projected toward the slide

coarse adjustment

• used to focus the microscope

• used only with the low power obective

• always used first

Fine adjustment 

• used to focus the microscope 

• used with the high-power objective 

Methylene Blue

used to stain a slide

1. Eyepiece lens

2. Coarse objective

3. Fine objective

4. Rack stop

5. Arm

6. Base

7. Tube

8. Revolving nosepiece of turret

9. Objective lenses

10. Stage with clips

11. Illuminator