System and method for expansion of field of view in a vision system

摘要

This invention provides a field of view expander (FOVE) removably attached to a vision system camera having an image sensor defining an image plane. In an embodiment the FOVE includes first and second mirrors that transmit light from a scene in respective first and second partial fields of view along first and second optical axes. Third and fourth mirrors respectively receive reflected light from the first and second mirrors. The third and fourth mirrors reflect the received light onto the image plane in a first strip and a second strip adjacent to the first strip. The first and second optical axes are approximately parallel and a first focused optical path length between the scene and the image plane and a second focused optical path between the image plane and the scene are approximately equal in length. The optical path can be rotated at a right angle in embodiments.

主权项

1. A system for expanding a field of view of a scene imaged by a vision system camera having a lens assembly and an image sensor defining an image plane, the system being constructed and arranged to search and analyze features of interest in the scene comprising:
at least a first mirror and a second mirror that transmit light from a field of view in a scene in at least a first partial field of view along a first optical axis and a second partial field of view along a second optical axis; and at least a third mirror receiving reflected light from the first mirror and a fourth mirror receiving reflected light from the second mirror, the third mirror and the fourth mirror reflecting the light through the lens assembly onto the image plane in a first strip and a second strip adjacent to the first strip, wherein the first optical axis and the second optical axis are approximately parallel and a first focused optical path length between the scene and the image plane and a second focused optical path between the image plane and the scene are approximately equal in length.