Notes on focimeters

1. When using a focimeter, ensure that the environment has sufficient light to ensure measurement accuracy.
2. When using a focimeter for measurement, you should use a clean fiber cloth or paper towel to gently wipe the surface of the measurement object to ensure that no oil or dirt will affect the measurement results.
3. During use, avoid placing the focimeter in high temperature, high humidity or extremely dry environments to avoid adverse effects on the accuracy and stability of the focimeter.
4. Lens meters usually require calibration and should be calibrated according to the instructions for use to ensure the accuracy of the measurement values.
5. When using a focimeter, make sure that the surface of the measurement object is flat and smooth, otherwise the measurement results may be affected.
6. When using a focimeter, care should be taken to avoid looking directly at the measurement light source to avoid adverse effects on vision.
7. When using the focimeter, avoid dropping the focimeter or subjecting it to severe vibration to avoid damage to it or affecting the accuracy of the measurement.
8. The focimeter is a precision instrument that should be kept properly and away from contact with sharp objects to prevent scratches or damage.
9. If the focimeter has not been used for a long time, it should be cleaned and placed in its original box before storage to protect the lens and instrument parts of the focimeter.