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US 10,539,725 B2Granted
Optical filter and camera module and electronic device
AssigneeSamsung Electronics Co., Ltd.
InventorsJong Hoon Won, Yong Joo Lee, Changki Kim, Hyung Jun Kim, Myungsup Jung
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Abstract
An optical filter includes a polymer film and a near infrared absorbing layer on the polymer film, where the near infrared absorbing layer transmits light in a visible wavelength region and selectively absorbs at least a part of light in a near infrared wavelength region. An average light transmittance of the optical filter in a wavelength region of about 700 nanometers (nm) to about 740 nm is less than about 7%.
Claims20
An optical filter comprising
- a polymer film, and
- a near infrared absorbing layer on the polymer film, wherein the near infrared light-absorbing layer transmits light in a visible wavelength region and selectively absorbs at least a part of light in a near infrared wavelength region,
- wherein an average light transmittance of the optical filter in an entire wavelength region of about 700 nanometers to about 740 nanometers is less than about 7%,
- wherein an average light transmittance of the optical filter in an entire wavelength region of about 740 nanometers to about 900 nanometers is equal to or less than 32%, and
- wherein the average light transmittance of the optical filter in the entire wavelength region of about 740 nanometers to about 900 nanometers is greater than the average light transmittance of the optical filter in the entire wavelength region of about 700 nanometers to about 740 nanometers.
2 more elements
Dependencies are inferred from the claim text.