ILLUMINATION OPTICAL SYSTEM FOR ENDOSCOPE, OPTICAL ADAPTER FOR ENDOSCOPE, AND OPTICAL ELEMENT
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United States of America
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Issued Date -
Feb 3, 2022
app pub date -
Jul 22, 2021
filing date -
Jul 22, 2021
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Abstract
A light transmission optical member for endoscope includes an incident surface provided at a distal end portion of an insertion section, light being made incident on the incident surface as incident light from a proximal end side of the insertion section, and an emission surface for emitting the light as illumination light. The emission surface includes a diffusing section that diffuses the emitted light. The diffusing section includes a plurality of convex-shaped sections extending in a predetermined direction on the emission surface. Each of the convex-shaped sections includes a first slope section having a first angle with respect to the emission surface, and totally reflecting the incident light, and a second slope section having a second angle smaller than the first angle with respect to the emission surface, and transmitting and emitting reflected light totally reflected on the first slope section and the incident light.
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