Glossy convex surfaces can be challenging to observe with the standard ring illumination equipped on our microscopes, as reflections may occur.
■ Illumination
| Using the standard ring illumination can significantly amplify the impact of reflections. | Attaching a polarizing filter to the tip of the lens and the illumination side during ring illumination usage can provide some improvement. |
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| Using twin-arm illumination, as shown in the photo below, allows for further reduction of reflections. (Adjustments to the angle may be necessary.) | Simply inserting a polarizing filter into the lens alone can lead to further improvement, as shown in the photo below. |
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| Observation using the same method (ring illumination → low-angle twin-arm illumination) for a convex lens (subject). | |
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| (Note) In the case of lenses, since the lens itself is transparent, the background color also becomes crucial. The above example features a white background, and the lens is observed with a raised position rather than being placed directly on the surface. | |
