| 摘要 |
A prism designed for endoscopes, consisting of a hollow internal region (36). The internal section defined by surfaces (40 and 42) are composed of a material with a higher index of refraction than the material which forms regions (32 and 34). The differences in the index of refraction between the hollow region (36) and the outer region of the prism (32 and 34) allow for total internal reflection of a light ray (38) within the hollow section. Consequently, light is then more focused, thereby permitting sharper images to be seen from the endoscope in question.
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