| 摘要 |
An optical profile reader, particularly for key duplicating machines, characterised by comprising: a photoemitter (16) positioned on one side of the profile (11) to be read, a photodetector (21) facing said photoemitter (16) on the opposite side of said profile to be read, an electronic circuit controlled by the output signal of said photodetector (21) and comprising a threshold discriminator (25) set at a value between the values corresponding to the maximum illumination state and minimum illumination state of said photodetector (21), and mechanical means (5, 8) for causing the profile (11) to be read (by 21) to move orthogonal to the direction of and relative to the light beam striking said profile, said mechanical means being controlled by said threshold discriminator circuit (25). |
