US 12,037,477 B2
Near-infrared ray absorbing article and optical apparatus comprising the same
Sung Hwan Moon, Pyeongtaek-si (KR); Seung Man Han, Pyeongtaek-si (KR); Seon Ho Yang, Pyeongtaek-si (KR); Tae Kwang Park, Pyeongtaek-si (KR); Joon Ho Jung, Pyeongtaek-si (KR); Bo Chul Kang, Pyeongtaek-si (KR); Hee Kyeong Kim, Pyeongtaek-si (KR); Seong Don Hwang, Pyeongtaek-si (KR); Seong Yong Yoon, Pyeongtaek-si (KR); Ho Seong Na, Pyeongtaek-si (KR); and Ji Tae Kim, Pyeongtaek-si (KR)
Assigned to LMS CO., LTD., Pyeongtaek-si (KR)
Filed by LMS CO., LTD., Pyeongtaek-si (KR)
Filed on Dec. 1, 2020, as Appl. No. 17/108,397.
Claims priority of application No. 10-2019-0173214 (KR), filed on Dec. 23, 2019; and application No. 10-2020-0147695 (KR), filed on Nov. 6, 2020.
Prior Publication US 2021/0191013 A1, Jun. 24, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 5/00 (2006.01); C08K 5/29 (2006.01); G02B 5/22 (2006.01)
CPC C08K 5/29 (2013.01) [G02B 5/003 (2013.01); G02B 5/223 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A near-infrared ray absorbing article comprising:
a glass substrate; and
a first light-absorbing layer and a second light-absorbing layer separated from each other,
wherein the first light-absorbing layer has an absorption maximum at any one wavelength within a wavelength range of 850 nm to 1,200 nm, and the second light-absorbing layer has an absorption maximum at any one wavelength within a wavelength range of 650 nm to 750 nm,
wherein the first light-absorbing layer includes a first binder resin and a first pigment, the first pigment being as a form of particles particle dispersed in the first binder resin and having an average particle diameter of 1 μm or less, and
wherein the second light-absorbing layer includes a second binder resin and a second pigment, the second pigment being as a form of non-particle for coloring the second binder resin,
wherein the glass substrate has a three-point flexural strength of 360 MPa or more as measured in accordance with the ASTM D790 standard, and
wherein a thickness of the glass substrate is in a range of 0.07 mm to 0.3 mm.