| abstract |
Three objective lenses ( 11 ) having optical axes L oriented to different directions are mounted on a head portion ( 10 ) of an endoscope device. The objective lens ( 11 ) has a predetermined view angle θ centered by the optical axes L. Each objective lens ( 11 ) is disposed so as to have the peripheral portions of its viewing field overlap with the peripheral portions of the viewing fields of adjoining other objective lenses ( 11 ). Hence, the three objective lenses ( 11 ) causes the head portion ( 10 ) as a whole to have a view angle φ extending over a wider range than the view angle θ of the objective lens ( 11 ) with no discontinuation. Each optical image of a testing target part captured within this view angle φ is imaged by an imaging element. |