| 摘要 |
A fixed vision system comprises a sensor (2) for acquiring an image of an object on a detecting plane (38), said sensor comprising a sensitive surface (10), a light-emitting device (3) for generating a luminous reference figure (39) on said detecting plane (38), said light-emitting device (3) comprising an emission surface (61a, 61b; 61c; 51; 89; 61d; 61e; 61f), at least an objective (36) through which a luminous radiation and a further luminous radiation pass, said luminous radiation coming from said object and being directed to said sensor (2) and said further luminous radiation coming from said light-emitting device (3) and being directed to said object, characterised in that said sensor (2) and said light-emitting device (3) are positioned in such a way that, when said detecting plane (38) is focussed by said objective (36) on said sensor (2), said sensitive surface (10) of said sensor (2) is on the image plane (60; 66; 67; 69; 73; 92) generated by said objective (36) or on a respective mirror plane (63, 64; 65) with respect to said image plane (60; 66; 67; 69; 73; 92) and said emission surface (10) of said light-emitting device (2) is on said image plane (60; 66; 67; 69; 73; 92) or on a respective mirror plane (63, 64; 65) with respect to said image plane (60; 66; 67; 69; 73; 92).
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