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US 2024/0255683 A1Published application
Optical filter
AssigneeLms Co., Ltd.
InventorsJoon Ho JUNG, Nam Woo KANG, Sun Jung KIM
Life of this patent
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Abstract
This invention provides an optical filter and its use. In the present invention, an optical filter capable of securing high transmittance in a necessary wavelength range (e.g., visible light region) while effectively blocking light in an unnecessary wavelength range (e.g., ultraviolet, and infrared ray) and its utilization can be provided.
Claims20
An optical filter comprising:
- a substrate;
- and
- a transmittance control layer formed on one or both surfaces of the substrate wherein an absolute value of a difference in a refractive index of the transmittance control layer with respect to a refractive index of the substrate is in a range of 2% to 10% and ΔT1 is 0.5% or more in Equation 1:
- Δ
-
- T
- 1
- =
- 100
- ×
- (
- T
- F
-
- 1
- -
- T
- S
-
- 1
- )
- /
- T
- S
-
- 1
- [
- Equation
-
- 1
- ]
- In Equation 1, wherein TF1 is an average transmittance in a wavelength range of 481 nm to 560 nm of the optical filter, and TS1 is an average transmittance in the wavelength range of 481 nm to 560 nm of the optical filter not including the transmittance control layer.
29 more elements
The optical filter of claim of 16, wherein the transmittance control layer is formed on a surface of the second light absorption layer opposite to the surface on which the first light absorption layer is formed.
Dependencies are inferred from the claim text.