Imaging Method with Separated Fields of Vision for High Accurate Visual Sensing

摘要

Visual sensing and measurement are utilized widely in the various production processes. In this visual sensing, high accurate micro sensing in the macro processing area is required. Wide field of vision is required for the visual sensing in a macro area. On the other hands, short pixel length in a pictured image is required for high accurate visual sensing. These two requirements are opposite for visual sensing by TV camera. In general, visual sensing by the plural TV cameras or movement of a TV camera is engaged for the visual sensing of the separated regions. But, these methods have significant problems in a calibration process of the optical parameters and their calibration accuracy. If the two separated region of the object works for measurement can be pictured on a same image plane of a TV camera, high accurate micro sensing in a macro view area can be realized and the calibration process will be done simply. In this research, we propose an imaging method with separated fields of vision by using a prism, and make clear the relation between the optical parameters and the fields of vision. The distance between the pictured fields of vision is fixed by a vertical angle and a refractive index of a prism and the distance between a pictured object and a lens of a TV camera.