Objectivelens magnification

STEP 4: Finally, add it up!Add step 2 to step 1 (add your thimble measurement to our sleeve measurement), and then just "tack" step 3 (your vernier measurement) onto the end. As an example, if you're measuring something that is 0.1234", you'd find the .100 on the sleeve (step 1), the .023 on the thimble (step 2), and then you'd add . 023 to .100 for a combined .123. Then, you'd find .0004 on the vernier scale and just tack that onto the end.TECH TIP:  Sometimes, for people who are learning this, when you have .123, and you see the .0004 on the vernier scale, it's easy to misunderstand, leave out a zero (.004), add it to .123 and get .127. It's easier to understand if you forget about the zeroes and just put the number from the vernier scale onto the fourth place (the ten-thousandths place), at the end of the .123, to obtain the correct measurement of .1234.

8. Condenser and Diaphragm: The condenser is located below the stage. Light from the illuminator passes through the condenser, which focuses all the light rays onto the specimen to maximize illumination. The diaphragm (also referred to as the iris) is located between the condenser and the specimen. The diaphragm allows the user to adjust the amount of light reaching the speimen.

Ocular objectivemicroscope

Ocularlens magnification

10. Light intensity adjustor: Another knob that some microscopes will have located on their base to control light intenstity.

Ocular objectivevs magnification

Example: An individual is viewing a slide under the microscope using the 40x objective.  Total magnification = 10x (ocular lens magnification) x 40x (objective lens magnification) = 400x total magnification

Objectivelens microscope function

9. Mechanical stage controls: These controls permit the slide, once clipped into the stage, to be maneuvered in the x-y axis.

Field of View: This is the maximum area visible when looking through the microscope eyepiece.       - When magnification increases the field of view        decreases      - When magnification decreases the field of view        increases

Objectivelens

3. Objective lens: The magnification of objective lenses typically ranges from 4x to 100x. Each lens magnification is designated on the metal casing of the lens.

1. Ocular lens (eyepiece): Each eyepiece contains a lens called the occular lens. The ocular lens typically has a magnification of 10x.

Inverted Image: When looking at a specimen through the microscope the image viewed through the eyepiece will be inverted, flipped upside down.

4. Coarse focus: Knob used for large-scale movements with the 4x objective lens. Rotation of this knob will move the stage closer or further away from the objective lens to permit focusing.

Check out this video and see Travers Tool Tech Team Expert Kurt Repsher demonstrate how to read outside micrometers. Outside micrometers are used for the accurate measuring of the thickness of an object or the outside diameter of a part. Be sure to subscribe to our YouTube Channel by clicking the button below, and check out many more exclusive 'How To' videos, product demos, unboxings and more!

2. Revolving nose piece (to hold multiple objective lenses): The nose piece allows for the user to change which objective lens is in place.

Ocular objectiveexample

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5. Fine focus: Knob used for small-scale movements with the 10x, 40x or 100x objective lens. Rotation of this knob will move the stage closer or further away from the objective lens to permit focusing.