Technical Articles Archives

Latex Gloves – Are You Allergic?


Many industrial manufacturing environments require workers to wear protective gloves, including during electronics and medical device production and assembly. Latex gloves not only protect workers from harmful chemicals but also protect products from worker contact and contamination during manufacturing Read more

ST 925 SMT Rework System–Three favorites combined into one nice savings


Save a few steps--and some money--with the Pace 925 SMT Rework System Pace has introduced a new low-cost “combination” system ideal for surface mount technology (SMT) rework. It’s worth adding up the savings by comparing the a la carte prices Read more

Metcal’s CV-5200 Connection Validation Soldering Station Changes Everything


You may or may not have heard about Metcal’s new soldering station, the CV-5200. The evolutionary tool removes much of the reliance on visual inspection of hand-soldered joints and adds a second, more technology-driven method for validating a successful Read more

How does a diopter work?

Posted on by Andy in Technical Articles Leave a comment

Diopter dilemma? Read on for more information on selecting the proper magnifier for you.

A diopter is a unit of measurement describing the optical power of a lens or curved mirror. When shopping for magnifiers, consider this: The diopter is equal to the reciprocal of the focal length measured in meters. For example a 5 diopter lens brings light rays to focus at 1/5 meter. Each diopter increases the size of the viewed object by 25% when the object is at its full focal length from the lens. Remember that as the lenses become stronger and magnification increases, viewing areas and focal length decrease.

An “x” usually follows the magnification number. This “x” is used to express power or the size of the object in relationship to its actual size.

How to select the magnifier for you:

  • Decide how much magnification you need. In doing so, remember that if you increase the magnification, the focal length and the viewing area will be smaller.
  • Determine which diopter you need.
  • Make sure you check the focal length and the diameter of the lens in accordance with your task

Magnifier All-Spec Industries provides all kinds of magnifiers to fit your needs.


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