MULTIDIRECTIONAL SIMULTANEOUS OBSERVATION OPTICAL SYSTEM AND IMAGE READER

摘要

A multidirectional simultaneous observation optical system has, as shown in Fig. 4-1, prism systems (65A, 65B) for acquiring each side image of an object (61) to be inspected and has a prism system (65F) for acquiring a bottom image of the object (61). Each of prism systems (65A etc.) has a prism section (64B etc.) for changing the optical path direction. An open space for acquiring an upper surface image of the object (61) is secured in the direction directly above the object (61). The prism systems are arranged such that the optical path of outgoing light from each prism system (65A etc.) is directed above the object (61) and the light is not intercepted by other prism systems. Consequently, the object can be observed simultaneously with high precision from each side of the object.