Optical filter, fingerprint identification module and electronic equipment
The utility model provides an optical filter, a fingerprint identification module and electronic equipment, and relates to the technical field of optical thin films, the optical filter comprises a transparent substrate, and a first long-wave-pass film system and a second long-wave-pass film system w...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model provides an optical filter, a fingerprint identification module and electronic equipment, and relates to the technical field of optical thin films, the optical filter comprises a transparent substrate, and a first long-wave-pass film system and a second long-wave-pass film system which are respectively arranged at two sides of the transparent substrate; the film system structure of the first long-wave-pass film system comprises (0.5 HL0. 5H) ^ 10, and the central wavelength of a transition zone is 700-900nm; the film system structure of the second long-wave-pass film system comprises (0.5 HL0. 5H) ^ 14, and the central wavelength of a transition zone is 780-900nm; wherein H corresponds to the high-refractive-index film layer, and L corresponds to the low-refractive-index film layer. The optical filter has high transmittance in a 830-950nm spectrum band, and is cut off in a 300-750nm spectrum band width, so that the characteristics of a passband and a cut-off band of the spectrum band optical |
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