| 摘要 |
PROBLEM TO BE SOLVED: To provide a lens unit for an endoscope capable of achieving a structure of fixing an imaging lens and an imaging device with an adhesive or the like, and to provide an endoscope.SOLUTION: The endoscope lens unit includes: a lens barrel; a lens L1 as a front-group lens and lenses L2 and L3 as rear-group lenses that are stored inside the lens barrel; and an aperture stop disposed between the lens L1 and the lens L2. An imaging-side final surface L3R2 of the lens L3 is configured to be fixed to a cover glass of an imaging device by an adhesion layer. A focal length fof the front group lens (the lens L1), a focal length fof the rear-group lenses (the lenses L2 and L3), an entire focal length fof an optical lens group LNZ, an entire optical length OL of the optical lens group LNZ, and a MetalBack MB of the optical lens group LNZ satisfy the following relations: f/f<0, f/f>0, and OL/MB>7.0.SELECTED DRAWING: Figure 3 |
