To provide a device for improving accuracy of identification of a segment of a multisegment filter rod, capable of controlling a cutting device.
A linear beam of a laser light source 22 is directed to be a spot or a fan-shape on the surface of a filter rod 20 so that, at the incident side of the light, the light vertically gets into the filter rod as a spot. In the filter rod body 20, the light conically spreads from the incident point, thereby, at the outgoing side, the light spreads in a range of A'-B' outgoing points by diffusion. In the outgoing side, an imaging device containing an aperture 16 is formed by using a lens 26 to minimize the effects of the aperture angle on a light receiving optical system. Thereby, the device and a method for inspecting the filter rod by letting in only the light on a short line I-II on the surface of the filter rod 20 through the rod onto the light receiving layer of a sensor 14 are provided.
LAEMMEL MAX
HAPKE SIEGFRIED
| JPH10206232A | 1998-08-07 | |||
| JPH0515426B2 | 1993-03-01 | |||
| JP2005512586A | 2005-05-12 | |||
| JPH0515428B2 | 1993-03-01 | |||
| JP2000333663A | 2000-12-05 | |||
| JPH082288B2 | 1996-01-17 | |||
| JPH0658327B2 | 1994-08-03 | |||
| JPS5826952B2 | 1983-06-06 |
| WO2003055338A2 | 2003-07-10 | |||
| US20020030820A1 | 2002-03-14 | |||
| US4639592A | 1987-01-27 | |||
| US4986285A | 1991-01-22 | |||
| US4011950A | 1977-03-15 | |||
| US3334240A | 1967-08-01 | |||
| EP0848246A1 | 1998-06-17 | |||
| DE3339187A |
Tsuneo Mihara
Okumura Yoshimichi
Blacksmith