IR cut-off filter and camera or an electronic apparatus having the same

• Main Authors: PARK, JI YOON, KANG, BYUNG KWON, KIM, MOON JOON, LEE, KI HUK, KIM, SUNG WON
• Format: Patent
• Language: English; Korean
• Published: 07.02.2018
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

According to various embodiments of the present invention, provided is an IR cut-off filter which includes an absorption type filter for absorbing infrared light in a first wavelength band, a first coating layer formed on a first surface of the absorption type filter, transmitting light of a visible light band, and reflecting a part of the infrared light, and a second coating layer formed on a second surface of the absorption filter and reflecting a part of the infrared light introduced into the first coating layer and the absorption type filter. The absorption type filter is formed to absorb reflective light formed by multiple reflection of the infrared light of a second wavelength band in the absorption type filter. Other embodiments are possible. Accordingly, the present invention can prevent a light blurring phenomenon. 본 발명의 다양한 실시예에 따르면, 제1 파장 대역의 적외선 광을 흡수하는 흡수형 필터와, 상기 흡수형 필터의 제1 면에 형성되며, 가시광선 대역의 광은 투과하고, 상기 적외선의 광을 일부 반사시키는 제1 코팅층과, 상기 흡수형 필터의 제2 면에 형성되며, 상기 제1 코팅층 및 상기 흡수형 필터로 유입되는 일부 적외선의 광을 반사시키는 제2 코팅층을 포함하고, 상기 흡수형 필터는, 상기 흡수형 필터 내부에서 제2 파장 대역의 적외선이 다중 반사되는 반사광을 흡수하도록 형성된 포함할 수 있다 다른 실시예가 가능하다.