Borescopes typically utilize coaxial illumination, such as the following.
However, for highly reflective objects, using a ring light designed for borescopes is also an option.
(Conditions such as “diameter greater than 10mm” or “shallow depth” may apply.)
This involves replacing the coaxial illumination with a dedicated ring light.
However, since direct connection to the borescope’s rod section is not possible, it is necessary to fabricate a fixture.
(The rod section of the borescope contains lenses and is sensitive to external forces.)
| Its lightweight nature allows for observation even with a simple chuck fixture. | The fixed holes of the ring light can also be used for secure fixation. |
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| ■Key Observational Points | |
| There is not much difference with direct-view borescopes. | |
 <Coaxial Illumination> |
 <Ring Illumination> |
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| In oblique or side-viewing borescopes, there is an effect to prevent halation. | |
 <Coaxial Illumination> |
<Ring Illumination> |
