Appearance inspection apparatus

Abstract

The invention provides an appearance inspection apparatus which can raise a shutter speed of an area sensor camera and realize high precision inspection in an appearance inspection apparatus employing a lightsection method. The appearance inspection apparatus has conveying means for conveying an inspection object and surface shape inspecting means for inspecting the surface shape of the inspection object. The surface shape inspection means has a slit beam irradiating section for irradiating a band-shaped slit beam on the surface of the inspection object, an area sensor camera for capturing images of the slit beam, first and second optical mechanisms for receiving reflected lights of the slit beam on the downstream and upstream sides in a conveyance direction, respectively, and guiding them to the area sensor camera, and a shape judging section for judging appropriateness of the surface of the inspection object based on images captured by the area sensor camera. Optical paths of the first and second optical mechanisms allow images of the reflected lights to be formed on the area sensor camera in a state of being aligned laterally.

Description

technical field [0001] The present invention relates to a device for inspecting the appearance of pharmaceuticals (tablets, capsules, etc.), food, mechanical parts, electronic parts, etc. (hereinafter referred to as "inspection objects"). Background technique [0002] Conventionally, as an apparatus for inspecting the surface appearance of the object to be inspected, for example, an apparatus disclosed in JP 2004-317126 A is known. [0003] This device irradiates laser slit light on the surface of the inspection object, and takes an image of the irradiated laser slit light through an appropriate camera device, analyzes the obtained image according to the light section method, and obtains the surface height of the inspection object Based on the obtained height data, the related data can detect the scars or gaps existing on the surface of the inspection object, and can also calculate the volume of the inspection object. [0004] Incidentally, in the inspection using this ligh...

AI Technical Summary

Problems solved by technology

[0004] Incidentally, in the inspection using this light sectioning method, if the laser slit light is photographed from only one direction, depending on the surface shape of the object to be inspected, some places will become blind spots in the photographing direction. The reflected light of the laser light cannot enter the blind spot, so there is a problem that the inspection cannot be performed correctly

Images