| 摘要 |
A checking device for tires of land and air vehicles which includes a coherent light source, a photo shutter as well as an optical circuit which divides a beam emitted by the light source into an object beam and into a reference beam, and which deflects these beams. The device comprises a conical mirror coaxial with the tire to be checked and located in the path of the object beam. A registering layer is located in the beam cone of the object beam reflected in a diffuse manner by the tire surface to be checked through the intervention of the conical mirror. In the beam path of the reference beam there is located a registering layer which is adapted to be observed by means of an observing system. Means are provided for subjecting the tire to be checked to a pressure drop relative to the atmosphere surrounding the tire to be checked. The conical mirror is by means of a platform arranged on a removable holding device at a height more than twice the height of a tire to be checked when the latter occupies its lying position while the holding device embraces the tire to be checked. The holding device for the conical mirror is movably connected to a hood which surrounds the last mentioned holding device and extends over the platform while forming an air-tight closing member adapted to be evacuated and to be lifted and lowered. The tires to be checked are arranged on devices adapted to be placed upon the platform coaxially about the conical mirror for observing the inner side of the tire tread surface and are arranged coaxially below the conical mirror for observing the bead and lateral wall surfaces.
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