Before buying optical comparator some  items that should be taken into consideration.

Light path is probably the first thing one would like to look into. Optical comparators comes in two configurations, with vertical light path and horizontal light path. Vertical light path instruments have a beam of light traveling vertically. Parts being inspected are placed on a plate of glass that the light beam travels through. Vertical optical comparators are ideal for flat parts like gaskets, O rings, stamped parts and electronics. Dorsey’s line of vertical optical comparators feature quick release mechanisms on both axes making measurements on our vertical machines much faster than on horizontal machines which feature quick release on only 1 axis.

Horizontal light path instruments have a beam of light traveling horizontally across a workstage. This type of machine is ideal for large heavy parts and shafts to be held on V blocks or between centers. Typical applications include castings, transmission shafts, thread form measurement and machined components.

Another important thing when selecting optical comparator is screen size. Screen sizes from 12″ to 80″ are available. Before choosing a screen size, determine how much of the part really must be viewed at one time. When using a digital readout system it is not necessary to view the entire part to measure it. Calculations can be made by dividing the screen diameter by the lens magnification. For example using 10X lens on a 16″ optical comparator would enable viewing 1.6″ of the part on the screen (16″÷10=1.6″). Verify that the workstage size, travel and weight capacity will accommodate all of the parts that are intended to be inspected. In general, optical comparators with screen sizes 16″ and smaller are benchtop units with weight capacities up to 110 pounds.

Please feel free to contact us with any questions regarding sales, applications, or competitive products.

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  • services sprite How to select the right optical comparator
  • services sprite How to select the right optical comparator
  • services sprite How to select the right optical comparator
  • services sprite How to select the right optical comparator
  • services sprite How to select the right optical comparator
  • services sprite How to select the right optical comparator
  • services sprite How to select the right optical comparator
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