Phosphor element, phosphor device, and illumination device
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United States of America Patent
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Jun 13, 2023
Grant Date -
Sep 1, 2022
app pub date -
May 18, 2022
filing date -
Nov 26, 2019
priority date (Note) -
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Abstract
A phosphor element includes an incident face for an excitation light, a reflecting face opposing the incident face and a side face, and the phosphor element converts at least a part of the excitation light incident onto the incident face into a fluorescence and emits the fluorescence from the incident face. The incident face has an area greater that an area of the reflecting face. The phosphor element includes an inclination region in which an inclination angle of the side face with respect to a vertical axis perpendicular to the incident face is monotonously increased from the reflecting face toward the incident face, viewed in a cross-section perpendicular to the incident face and along the longest dividing line halving the incident face.
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