Suitable microscopes and unsuitable microscopes for dimension measurement(copy)How to measure with a digital microscope - Calibration method using MFShip -

■What is calibration?
When making measurements with a digital microscope, you need to perform calibration before making measurements.
The field of view of the monitor image varies depending on the lens used and the magnification of the microscope.

Therefore, it is necessary to set a standard for the length of the image displayed on the monitor.
This is called calibration.

■How to calibrate
Calibration methods vary depending on the camera and software.
Here, we will use MFShip (standard version) which comes standard with Shodensha's USB microscope.

1. Prepare something to use as a standard for length.
Here, we will use the calibration glass scale GS-4SQ, which we handle.

2. Project the glass scale on the monitor at the magnification you want to measure and adjust the focus.

3. From the MFShip menu bar,
select "Environment" → "Calibration" → "Manual Calibration".


4. A red reference line will appear in the image.
You can move it or change its length by dragging it, so align the red reference line with the scale on the glass scale.


*Tips for accurate calibration
1. Near the center!
Lenses produce images with less distortion closer to the center.
Therefore, calibrating near the center improves measurement accuracy.


2. Read the scale correctly!
The set of 'squares' and the 'lines between squares' is the length of the grid.

If it spans multiple squares, 2. below is the correct length.


3. Make it longer!
Calibrating at a longer length will reduce errors.

Example
500μm and 10um off → 10/500 = 2% error
2500μm and 10um off → 10/2500 = 0.4% error

Considering the above,
calibrating near the center, at a length about half the length of the screen, will allow for accurate measurements.


4. Enter the length and unit and press OK to open the Calibration Manager window.

Give the calibration data a name and press OK to complete the calibration process.

It is useful to reflect the name of the microscope and magnification (the number on the zoom lens dial) in the name
when loading the calibration data.
Example: TG500CS-x3, USH500CS-ULT-highest magnification, etc.

This completes the calibration process.
Calibration must be performed for each magnification and microscope used.
In MFShip, the calibration data created can be loaded from the calibration manager,
so there is no need to calibrate again if you are using the same microscope or magnification.

■Summary
In order to measure with a microscope, calibration must first be performed. Also, the correct calibration method will allow for highly accurate measurements.

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