Lighting device
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United States of America Patent
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Oct 22, 2024
Grant Date -
Jul 4, 2024
app pub date -
Jan 25, 2022
filing date -
May 12, 2021
priority date (Note) -
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Abstract
A lighting device according to an embodiment includes a light source, a cup lens, and a condenser lens. The light source emits light in a punctiform manner. The cup lens is arranged at the emission side of the light source. The condenser lens is arranged at the emission side of the cup lens. The cup lens includes: a bottom surface having a first outer shape and having a substantially circular shape; a top surface having a second outer shape larger than the first outer shape and having a substantially circular shape, the top surface being at the emission side of and spaced apart from the bottom surface in the optical axis direction; a side surface continuous with the bottom surface and the top surface; and a recessed part having a substantially cylindrical shape, provided substantially at the center of the bottom surface, and accommodating the light source.
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