LIGHT TRANSMISSIVE MEMBER, LIGHT SOURCE DEVICE, METHOD OF PRODUCING LIGHT TRANSMISSIVE MEMBER, AND METHOD OF PRODUCING LIGHT SOURCE DEVICE
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United States of America
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Issued Date -
Mar 20, 2025
app pub date -
Sep 17, 2024
filing date -
Sep 17, 2024
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Abstract
A light transmissive member, a light source device, a method of producing a light transmissive member, and a method of producing a light source device, which can suppress occurrence of damage, are provided. The light transmissive member includes a light transmissive base member having a first surface and a second surface positioned on a side opposite to the first surface, a light transmissive first film covering the first surface, a light transmissive second film covering the second surface, and a light transmissive third film provided over the second film. The first film contains hydrous alumina. The second film contains aluminum oxide having a crystallinity lower than that of α-alumina. Hardness of the third film is higher than hardness of the second film.
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