| CPC G02B 23/243 (2013.01) [G02B 5/04 (2013.01); G02B 23/04 (2013.01); H04N 23/80 (2023.01)] | 12 Claims |
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1. An endoscope comprising:
an insertion portion;
an objective lens configured to form light into a light beam along an optical axis;
a light splitting element configured to split the light beam into a first light beam and a second light beam;
a reflection mirror configured to reflect the first light beam;
a first image pickup sensor on which an image of the first light beam reflected by the reflection mirror is formed; and
a second image pickup sensor on which an image of the second light beam from the light splitting element is formed,
wherein the light splitting element comprises:
a first surface configured to emit the first light beam in a first direction towards the reflection mirror; and
a reflection prism comprising:
a perpendicular surface being perpendicular to the optical axis;
a parallel surface being disposed along the optical axis; and
a second surface that is an inclined surface disposed to be inclined with respect to the optical axis, the second surface being arranged downstream of the first surface along the optical axis, configured to emit the second light beam in the first direction towards the second image pickup sensor,
wherein the optical axis is disposed to be offset from a center line of a distal end portion of the insertion portion, and
wherein the reflection prism is disposed such that, as viewed from the center line, the inclined surface is disposed outward in a radial direction and the parallel surface is disposed inward in the radial direction.
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