US 2019/0055375 A1 · OPTICAL ARTICLE AND OPTICAL FILTER COMPRISING SAME

Abstract

The present invention relates to an optical article and an optical filter comprising the same. The optical filter comprises an optical article containing one or more near-infrared absorbing dyes and having two or more absorption peaks comprising a first absorption peak and a second absorption peak in a wavelength range of 380 nm to 1,200 nm whereby the optical filter has advantages in that transmissivity is high with respect to light having the wavelength of a visible light region and transmissivity is suppressed to 0.6% or less with respect to light having a wavelength in the range of 800 nm to 1,000 nm so that ghost image problems can be prevented, and a yield and productivity can be improved through the reduction of poor assembly caused by the bending of the optical filter in an image device assembling process.

Claims14

Dependent claims

An optical article comprising:

a transparent base containing one or more types of near-infrared absorbing dyes, and
wherein an absorption spectrum measured using a spectrophotometer in a wavelength range of 380 to 1,200 nm has two or more absorption peaks including first and second absorption peaks as below,
the first absorption peak has an absorption maximum (λmax1) in a wavelength range of 650 to 750 nm,
the second absorption peak has an absorption maximum (λmax2) in a wavelength range of 830 to 980 nm, and
when an optical density value (OD1) at the absorption maximum of the first absorption peak is normalized to be 1, an optical density value (OD2) at the absorption maximum of the second absorption peak satisfies the following Equation 1:
0.03<OD2<0.36. [Equation 1]

3 more elements

An optical filter comprising:

a transparent base containing one or more types of near-infrared absorbing dyes;
and
a selective wavelength reflection layer formed on one or both surfaces of the transparent base, and which satisfies the following conditions (A) and (B) in measurement of a transmission spectrum using a spectrophotometer in a wavelength range of 380 to 1,200 nm:
(A) in a wavelength range of 800 to 1,000 nm, a maximum transmittance with respect to light incident in a vertical direction of the optical filter is 0.3% or less;
and
(B) in the wavelength range of 800 to 1,000 nm, a maximum transmittance with respect to light incident in a direction having an angle of 30° with respect to the direction perpendicular to the optical filter is 0.6% or less.

3 more elements

Dependencies are inferred from the claim text.

Optical article and optical filter comprising same

Life of this patent

Optical article and optical filter comprising same

Life of this patent

Abstract

Claims14