Graticules

Question 1

What is a graticule ?

Answer 1

Used to measure images seen through a light microscope. It is a glass disc placed in the eye piece with a 0-100 scale.
Usually 10mm long.

Question 2

What is a scale micrometer ?

Answer 2

A precise measuring device with a small scale that is placed in a microscope stage and used to calibrate the value of eyepiece divisions at different magnifications.
Usually 1mm long.

Question 3

Explain in detail how you use an eyepiece graticule.

Answer 3

1. Place a graticule in the eye piece of the microscope.
2. Place the stage micrometer slide onto the stage.
3. Line up the eye-piece graticule and the stage micrometer.
4. Look along the scales until you see two points that match up.
5. Divide the graticule value by the stage micrometer value.
6. Divide your answer by 10 micrometers.
   This tells you what one until on the eyepiece graticule is.