... 5. With anti-miscellaneous-ray mask around samples, facilitate the observation of large samples;6. Have 254, 365nm UV source ... optic ink, to observe holographic anti-counterfeit identification documents, samples and other instruments;8. Multiple sets of measuring devices ... measure the distance, angle, perimeter, area.9. Area of objective stage: 240mm×150mm; movement range: Horizontal movement 80mm, ...