MICROSCOPE

Eyepiece

the lens you look through at the top. It typically has a built-in magnification of 10x.

Objective Lenses

The primary lenses closest to the specimen, mounted on a rotating nosepiece. Most microscopes have 3 or 4 objectives:

Illuminator

is the light source at the bottom.

Stage

The flat platform where you place your slide.

Coarse Focus Knob

The larger knob that moves the stage up and down rapidly. Only use this on the lowest magnification (4x) to avoid accidentally smashing the slide into a lens.

Fine Focus Knob

The smaller knob used to sharpen the focus. This is the only focus knob you should use when switched to high-power objectives.

Scanning (4x)

used for quickly locating the specimen

Low Power (10x)

provides a broader view of the structure

High Power (40x)

reveals fine, detailed structures

Oil Immersion (100x)

used with a special immersion oil to achieve maximum resolution at high magnification

Condenser

located directly beneath the stage and concentrated and aligns the light rays from the illuminator into a tight intense cone that passes straight through the specimen

Base

sits flat for stability

Arm

supports the upper tube and connects it to the base

Stage Clips

holds glass firmly in stage

lets you slide horizontally or vertically without touching it

Nosepiece

revolving turret that lets you switch to a different objective lens

TEM & SEM

2 Types of Electron Microscope

Transmission Electron Microscope

It uses 2D to show the internal structures

Scanning Electron Microscope

It uses 3D structures to show the surfaces

Red

Color for scanning

Yellow

Color for Low Power

Blue

Color for High Power

Black

Color for Oil Immersion