DE2015606C - Device for testing a strip-shaped material - Google Patents

Description

Chen device test objects of smaller width tested 60 extends that they always then non-scattered light then you have to, in order to avoid having to use different bandwidths. At the erfindungstaststrahl hits the cylinder lens directly, through an appropriate solution, as it is explained in the figure, Additional measures are taken to ensure that the cylinder lens 60 is assigned a mask 100, Cylinder lens only passed through the band in this way in the longitudinal direction of cylinder lens 60 collects the scattered radiation and extends it to the surface so that it always then does not scatter light Focused detector facility. Albeit by ver intercepts the scanning beam when the beam is next to adjustable beam dimming or reduction in the band lies, whereby the band width does not depend on reports it could be ensured that only is long. Although a small part of the scattered loan

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This is lost (zone A) when a band is loaded using this mask 100, but the majority of the scattered light penetrating the band and providing quality information (zone A) is focused on the spherical concave mirror 62, but the beam falls next to it

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detect) of the photodetector.

1 sheet of drawings

Claims (2)

scattered radiation reaches the detector device, so . _D ♦ u is the use of such facilities Claim: un-Icelandic, in particular because these facilities each for the different widths of Device for testing a band-shaped 5 gene test items must be adjusted Material by means of a relative to the test object in The invention is based on the object of the transverse extent of which is movable bundle device of the imploring .An zu ^ s, ape, a scanning beam that penetrates the test, which is simply constructed, but in which, however, more destructive and with a radiation detector device, without the scanning radiation required for different widths after penetration of the With test specimens any adjustment measures are carried out on the test specimen by means of a cylinder lens. It is ensured that the optical device can only be fed when transmitting, because - penetration of the test specimen is scattered and therefore characterized by the fact that the cylinder-weakened radiation on the detector device (60) in Longitudinal direction a one beam is focused. Lemmdurcmassige M ^ ke-forming strips (100) 15 According to the invention, this object is thereby and is arranged so that the strip is released that the cylinder lens in the longitudinal direction one (100) in the absence of the test object (32 "), the strip that forms a radio-opaque mask in it Has blocked the case unscattered scanning beam and is arranged so that the strip be. missing test item not matched in this hall: treu-20 th scanning beam blocked. The invention is hereinafter based on the Drawing explained in more detail. The only figure shows a perspective view of a cylindrical lens as it is used in the invention. 35 In the drawing, a deficiency must be The invention relates to a device for testing the strip 32 ″ shown. A light spot 101 fen eices band-shaped material by means of a relative is added over the band in the direction of an arrow Test specimen movable in its transverse extent and brought here. The light penetrates through the belt 32 The bundle of a scanning beam penetrating the test object is scattered, whereupon it is caused by a cylindrical radiation and with a radiation detector device, 30 lens 60 is collected, which makes it a spherical which reflect the scanning radiation after penetrating the test concave mirror 62 or another by means of a means having a cylinder lens, which guides the light to a photonoptical Facility can be supplied. detector feeds. The light spot 101 can be of a In devices of the type mentioned above, the known device must be produced and over the belt be passed through the optical device to determine 35. A description of these anterior imperfections on the surface and inside of the abutment is not felt for an understanding of the invention Bands that are required when passing through this. Band scattered scanning radiation on the detector- As already explained, this is out of the band- facility to be focused. If the light entering the focus is scattered, the cylindrical lens 60 Ren the scattered radiation, a cylinder lens serves to collect this scattered light in order to then the following difficulty arises, among others, to focus on the photodetector. How to achieve on: 1. The beam of the scanning radiation can see if the cylindrical lens 60 is in the shadow of the during the scanning movement over the tape to be tested, tape 32 ", so that all of it received reach out so that scanning radiation is attenuated directly on the light from tape 32 ". Would the Cylinder lens meets. 2. The cylinder lens collects 45 "narrow the width of the band 32" so that the scan does not only scattered radiation, but also the partial beam could sometimes get to the photodetector, the scanning radiation, which scatters the test object without first penetrating the tape, could to be penetrated. Photodetector overlit, d. H. damaged or So that the detector device is not insensitive to any irradiation due to its great strength above a maximum value for which it is designed 50 of the light to which it is exposed when the beam is exposed, it is necessary that only impact next to the tape. There are various options Scattered radiation on the detector facility to focus methods that exclude this possibility and is siert because the strength of this radiation by ensuring that bands of different Band is weakened enough. Will be able to be checked at a pre-width; z. B. Shielding direction of the aforementioned type a cylinder 55 of the part of the cylinder lens onto which the beam is directed lens used in the optical device then impinges when it is adjacent to the tape; or under-must the cylinder lens should be as wide as the refraction of the ray at its starting point, th occurring width of one with the device when it is not aimed at the tape. corresponds to the test item to be tested. Should such a procedure, however, be relatively un-