Light source device

The light source device addresses the challenge of increasing light output and stability by employing a reflection unit and condensing optical system to minimize fluorescence loss, resulting in improved efficiency and output.

WO2026110752A1 Publication Date: 2026-05-28AITEC SYST
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Patent Information

Application Number
PCT/JP2025/040188
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-11-19
Filing Date
2025-11-17
Publication Date
2026-05-28

AI Technical Summary

Technical Problem

Existing light source devices that utilize laser beams to excite phosphors for fluorescence emission face challenges in increasing light output while maintaining stability and efficiency.

Method used

A light source device design that includes a reflection unit, a phosphor unit, and a condensing optical system, where the reflection unit reflects laser beams to a phosphor unit, and the condensing optical system directs fluorescence in an opposite direction, with the reflection unit occupying less than 1/3 of the lens surface area to minimize fluorescence loss and enhance light output.

Benefits of technology

The design achieves stable and increased light output by reducing fluorescence loss and optimizing the reflection and condensing processes, thereby enhancing the overall efficiency of the light source device.

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Abstract

This light source device is provided with: a reflection part (30a) that reflects a laser beam bundle B having a plurality of laser beams; a phosphor part (40); and a light-condensing optical system (50) that is disposed between the reflection part (30a) and the phosphor part (40), allows the laser beam bundle (B) reflected by the reflection part (30a) to pass therethrough in a first direction, and directs the laser beam bundle (B) toward the phosphor part (40). The light-condensing optical system (50) allows fluorescence emitted radially from the phosphor part (40) to pass therethrough in a second direction opposite to the first direction and emits the fluorescence. When viewed from a fluorescence emission direction which is a direction in which the light-condensing optical system (50) emits the fluorescence, a range in which the reflection part (30a) is provided is 1 / 3 or less with respect to an area of a lens surface (51a) of the light-condensing optical system (50) through which the fluorescence last passes in the second direction.
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