US 12,169,175 B2
Imaging system
Yuichiro Ikenaga, Kanagawa (JP); Satoshi Nagae, Tokyo (JP); and Yuuichirou Kita, Aichi (JP)
Assigned to Sony Group Corporation, Tokyo (JP)
Filed by Sony Group Corporation, Tokyo (JP)
Filed on Sep. 20, 2023, as Appl. No. 18/370,450.
Application 18/370,450 is a continuation of application No. 17/555,515, filed on Dec. 20, 2021, granted, now 11,788,966.
Application 17/555,515 is a continuation of application No. 16/324,675, granted, now 11,221,296, issued on Jan. 11, 2022, previously published as PCT/JP2017/024582, filed on Jul. 5, 2017.
Claims priority of application No. 2016-161544 (JP), filed on Aug. 19, 2016.
Prior Publication US 2024/0011909 A1, Jan. 11, 2024
Int. Cl. G01N 21/64 (2006.01); A61B 1/00 (2006.01); A61B 1/04 (2006.01); A61B 5/00 (2006.01); A61B 90/00 (2016.01); A61B 90/20 (2016.01); G02B 21/00 (2006.01); G02B 23/24 (2006.01)
CPC G01N 21/6458 (2013.01) [A61B 1/00 (2013.01); A61B 1/043 (2013.01); A61B 5/0071 (2013.01); A61B 90/20 (2016.02); A61B 90/361 (2016.02); A61B 90/37 (2016.02); G01N 21/64 (2013.01); G02B 21/00 (2013.01); G02B 23/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An imaging system comprising:
a light source configured to emit light including a component in at least a first excitation wavelength band to excite a first fluorescence material emitting a first fluorescence belonging to a near-infrared wavelength band, and to emit light including a component in at least a second excitation wavelength band to excite a second fluorescence material emitting a second fluorescence belonging to a biological window wavelength band and being less than the near-infrared wavelength band of the first fluorescence;
a first image sensor configured to receive light including a component of a visible wavelength band and output a first imaging signal;
a second image sensor configured to receive light including a component of the first fluorescence and of the second fluorescence, and output a second imaging signal;
a dichroic film configured to separate light including the first fluorescence and the second fluorescence into a first optical branch and light including the visible wavelength band into a second optical branch;
a notch filter before the second image sensor, the notch filter configured to suppress at least the first excitation wavelength band and the second excitation wavelength band; and
a pass filter to transmit light that includes the biological window wavelength band and block light in the visible wavelength band that includes green and blue light.