IMAGE CAPTURE SYSTEM AND IMAGING OPTICAL SYSTEM

摘要

An image capture system including two imaging systems of the same structure each having a wide-angle lens, which includes a front group, a reflection surface, and a rear group arranged in order from an object side, has a field angle larger than 180 degrees, and bends an optical axis of the front group toward the rear group by the reflection surface, and an imaging sensor, obtains an image in a solid angle of 4π radian by combining images imaged by the imaging systems. Each of the two wide-angle lenses includes the reflection surface between the front group and the rear group, the reflection surfaces are made to be common to the two imaging systems. This reduces an interval between lenses nearest to the object side in the front groups of the two wide-angle lenses, thereby reducing a distance between maximum field angles of the two wide-angle lenses.

主权项

1. An image capture system in which two imaging systems of the same structure each including a wide-angle lens having a field angle larger than 180 degrees and an imaging sensor for taking an image formed by the wide-angle lens are combined, and which obtains an image in a solid angle of 4π radian by combining images taken by the respective imaging systems, wherein
the wide-angle lens of each of the imaging systems includes a front group, a reflection surface, and a rear group being arranged from an object side to an image side, and bends an optical axis of the front group toward the rear group by the reflection surface, the two wide-angle lenses are combined such that the optical axes of the front groups are coincident with or close to each other and directions of the front groups are opposite to each other, and optical axes of the rear groups are in parallel with each other and directions of the rear groups are opposite to each other, and include the reflection surfaces as a reflection film made to be common to the two wide-angle lenses, the reflection film made to be common constitutes a reflection surface member made to be common with optically equivalent two transparent members which sandwich the common reflection film therebetween, and the reflection surface member is held by a common body tube portion to which the respective front groups and the respective rear groups of the two wide-angle lenses are mounted.