公开(公告)号：US20170322076A1

公开(公告)日：2017-11-09

申请号：US15299113

申请日：2016-10-20

Applicant: Platinum Optics Technology Inc.

Inventor： Hsin-Miau PENG ,  Chung-Han LU ,  Liang-Yu YEN

IPC: G01J1/04 ,  G02B5/20 ,  G02B5/22

CPC classification number: G01J1/0488 ,  G01J2003/1226 ,  G02B5/208 ,  G02B5/223 ,  G02B5/226

Abstract: The present disclosure provides a near-infrared absorbing filter, including an absorbing type infrared filtering medium having opposite first and second surfaces; an organic coating layer formed on the first surface of the absorbing type filtering medium for absorbing infrared rays; a first multi-layered film structure formed on the organic coating layer with the organic coating layer disposed between the first multi-layered film structure and the absorbing type infrared filtering medium; and a second multi-layered film structure formed on the second surface of the absorbing type infrared filtering medium. The near-infrared filter of the present disclosure is able to reduce the wavelength difference of T50 and T20 of the incident light within the range of from 0 to 30 degrees to less than 5 nm, thereby reducing chromatic aberration effectively and reducing ghost images of infrared reflections. The disclosure further provides an image sensor including the near-infrared absorbing filter.