US 12,443,024 B2
Optical signal detection device, gel unit, and method for manufacturing gel unit
Yoshiharu Saito, Nagano (JP); Kengo Osawa, Nagano (JP); and Daisuke Nishiwaki, Nagano (JP)
Assigned to Evident Corporation, Nagano (JP)
Filed by Evident Corporation, Tatsuno-machi (JP)
Filed on Mar. 2, 2023, as Appl. No. 18/116,786.
Claims priority of application No. 2022-040475 (JP), filed on Mar. 15, 2022; and application No. 2022-200074 (JP), filed on Dec. 15, 2022.
Prior Publication US 2023/0296874 A1, Sep. 21, 2023
Int. Cl. G02B 21/33 (2006.01); G02B 21/02 (2006.01); G02B 21/24 (2006.01); G02B 21/06 (2006.01)
CPC G02B 21/33 (2013.01) [G02B 21/02 (2013.01); G02B 21/24 (2013.01); G02B 21/06 (2013.01); G02B 2207/109 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An optical signal detection device comprising:
an objective; and
a gel unit including a gel and an assisting member, wherein
the assisting member includes a first surface, a second surface, and an opening,
the opening has a diameter smaller than an outer diameter of the gel and larger than an effective diameter of the objective,
the first surface faces the gel,
a part of the first surface is fixed to a bottom surface of the gel by an adhesive force,
a center of the bottom surface is not in contact with the assisting member, and
in a state where the gel unit is attached to a frame member of the objective, the second surface faces the frame member of the objective, a part of the first surface is fixed to the gel outside the effective diameter of the objective, and the gel is in close contact with the objective.