OPTICAL GLASS AND ULTRAVIOLET LIGHT EMITTING DEVICE
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United States of America Patent
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Issued Date -
Jul 4, 2024
app pub date -
Dec 21, 2023
filing date -
Dec 28, 2022
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Abstract
An optical glass having: a transmittance of light at a wavelength of 270 nm of 50% or more when converted into the transmittance with a thickness of the optical glass being 1.0 mm; an average thermal expansion coefficient in a range of 50° C. to 400° C. of 4.4 ppm/° C. to 7.2 ppm/° C.; a refractive index nd of 1.55 or more; and an Abbe number vd of 50 to 60.
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