Patent ID: 11913888
Assignee: HAMAMATSU PHOTONICS K.K.
Field: nan (nan)
Classification: CPC nan | IPC G

Claim 0:
1. A solid immersion lens unit comprising:
a solid immersion lens having a contact surface for coming into physical contact with a semiconductor device formed of a silicon substrate and a spherical surface to be disposed to face an objective lens, wherein the solid immersion lens transmits light having at least a part of wavelength in a range of 200 nm or greater and 1100 nm or lower;
a holder holding the solid immersion lens; and
an optical lens held by the holder to be positioned between the objective lens and the solid immersion lens, wherein the optical lens corrects aberration caused by a difference in refractive indices between the silicon substrate and the solid immersion lens,
wherein the solid immersion lens is made of GaAs, GaP, SiC, or diamond,
wherein the optical lens is made of a material different from that of the solid immersion lens,
wherein the optical lens is bonded to a step portion extending so as to surround an opening of the holder, and
a surface of the optical lens faces the spherical surface of the solid immersion lens at a predetermined interval and extends along the spherical surface of the solid immersion lens.