INSULATING COATING FOR CUT-OFF INFRARED RAYS

Disclosed is an insulation coating for efficient shielding from both of a near-infrared region and a far-infrared region of the solar light. An insulation coating for infrared shielding according to an embodiment of the present invention comprises a first refractive index layer having a first refractive index, a second refractive index layer having a second refractive index lower than the first refractive index, and a third refractive index layer having a third refractive index lower than the second refractive index, wherein a refractive index layer having a relatively smaller refractive index is located on a refractive index layer having a relatively larger refractive index, and a first refractive index difference, which is the difference between the first refractive index and the third refractive index, is larger than a second refractive index difference, which is the difference between the second refractive index and the third refractive index, so the near-infrared rays of the solar light are shielded by the first refractive index difference, and the far-infrared rays of the solar light are shielded by the second refractive index difference. 태양광의 근적외선 영역 및 원적외선 영역 모두를 효율적으로 차폐하는 단열코팅이 개시된다. 본 발명의 일 실시예에 따른 적외선 차폐 단열코팅은, 제1 굴절률을 갖는 제1 굴절률층, 제1 굴절률보다 낮은 제2 굴절률을 갖는 제2 굴절률층 및 제2 굴절률보다 낮은 제3 굴절률을 갖는 제3 굴절률층을 하나 이상 포함하여, 굴절률이 상대적으로 큰 굴절률층 상에 굴절률이 상대적으로 작은 굴절률층이 위치하도록 형성되고, 제1 굴절률 및 제3 굴절률의 차이인 제1 굴절률차는 제2 굴절률 및 제3 굴절률의 차이인 제2 굴절률차보다 크고, 제1 굴절률차에 의해 태양광의 근적외선이 차폐되고, 제2 굴절률차에 의해 태양광의 원적외선이 차폐된다.