US 12,487,445 B2
Image pickup unit and endoscope
Takanori Sekido, Sagamihara (JP)
Assigned to OLYMPUS MEDICAL SYSTEMS CORP., Tokyo (JP)
Filed by OLYMPUS MEDICAL SYSTEMS CORP., Tokyo (JP)
Filed on Sep. 21, 2023, as Appl. No. 18/371,176.
Application 18/371,176 is a continuation of application No. PCT/JP2021/021217, filed on Jun. 3, 2021.
Prior Publication US 2024/0012233 A1, Jan. 11, 2024
Int. Cl. G02B 23/24 (2006.01); H04N 23/50 (2023.01)
CPC G02B 23/243 (2013.01) [H04N 23/555 (2023.01)] 7 Claims
OG exemplary drawing
 
1. An image pickup unit comprising:
a three-dimensional wiring board having a recess;
a stacked device including a plurality of optical elements and an image pickup device that are housed in the recess; and
sealing resin that fills a gap between the recess and the stacked device, wherein
the plurality of optical elements include a composite element that has a first optical member and a second optical member disposed on the first optical member,
the second optical member has an elastic modulus smaller than an elastic modulus of the first optical member and smaller than an elastic modulus of the image pickup device, and larger than or equal to an elastic modulus of the sealing resin, and
the sealing resin has a thermal expansion coefficient larger than a thermal expansion coefficient of the first optical member and larger than a thermal expansion coefficient of the image pickup device, and smaller than a thermal expansion coefficient of the second optical member.