Patent ID: 9453961
Filing Date: 2016-09-27
CPC Classification: G02B,H04N

Claim Text:
1. An image pickup apparatus comprising: an imaging optical system; an image pickup device; and an optical fiber bundle constituted by a plurality of optical fibers configured to guide light from the imaging optical system to the image pickup device, wherein a light incident surface of the optical fiber bundle is a concave surface with respect to the imaging optical system, an optical fiber distant from an optical axis of the imaging optical system among the plurality of optical fibers satisfies the following Expression: where α is an inclination angle of the optical fiber with respect to the optical axis of the imaging optical system, β is an inclination angle of the light incident surface of the optical fiber with respect to the optical axis of the imaging optical system, ω is an angle, with respect to the optical axis of the imaging optical system, of a principal ray from the imaging optical system incident on the optical fiber, N1 is a refractive index of a core of the optical fiber, and N2 is a refractive index of a clad of the optical fiber.