Imaging optical system, imaging device and imaging system

An imaging system, comprising:

• two or more imaging bodies, each imaging body of the two imaging bodies including:
• an optical system including a reflection member, a first lens group and a second lens group, the first lens group arranged on an object side and the second lens group is arranged on an image side;
• and
• an imaging element configured to change light condensed by the optical system into an image signal, the imaging element being disposed on a substrate, wherein
• at least one of the first and second lens groups includes an aspheric surface lens,
• each imaging body satisfies the following first condition:
• r≤p−q/tan(F/2), where
• F is a maximum angle of view (degree) of the optical system of the imaging body,
• p is a distance from an incident light beam position at the maximum angle of view in the optical system to an incident light beam position at a center angle of view in the optical system,
• q is a distance from the incident light beam position at the maximum angle of view to an end surface of the substrate, and
• r is a distance from a center of the imaging element on the substrate provided with the imaging element to an end of the substrate,
• each imaging body satisfies the following second condition:
• LF<LR, where
• LF is a first distance from a first surface to a reflection surface, the first surface of the first lens group and being closest to the object side, and
• LR is a second distance from a second surface to the reflection surface, the second surface of the second lens group and being closest to the image side,
• the two or more imaging bodies include a common housing,
• a part of the common housing is arranged between the substrate and the incident light beam position at the maximum angle of view, and
• each imaging element and the substrate are housed in the common housing.