DE10320165A1 - Device for inspecting components, in particular boreholes - Google Patents

Abstract

The invention has for its object to provide a device of the type mentioned, in which boreholes of different diameters and depths can be inspected without immersion in the borehole itself. DOLLAR A According to the invention the object is achieved in that the device contains an imaging optical system which consists of a front imaging system and a rear imaging system, which can be varied in their mutual position, the entrance pupil of the entire imaging system being in front of the first is mapped optically effective area, the area of the borehole to be examined is mapped to an electronic receiver and means for coupling an illumination beam path into the optical image are arranged. DOLLAR A The invention relates to a device for examining mechanical components with depressions and / or openings, in particular for examining boreholes.

Description

The The invention relates to a device for the investigation of mechanical Components with depressions and / or openings, in particular for examination of boreholes

she is used for optical inspection of the surface quality of the cylinder and floor space of mechanically made recesses - preferably of boreholes - in materials everyone

in the Various solutions for inspecting boreholes are known in the prior art. Most borehole inspection optical systems require one Feed movement parallel to the center axis of the inspected Drilling.

Classical endoscope solutions drive into the opening and, depending on the deflection angle, form part of the interior the hole. For the cylinder surface is the deflection angle 90 ° and for the base area 0 °. Doing so dependent on the entry depth only a part of the cylinder surface or the Floor space the hole recorded.

newer endoscope solutions allow 360 ° imaging the cylinder surface as a ring picture. Such a device is described in the product information 2003 “Endoskope and TV probes "the ViSiTOOL GmbH described.

Farther the use of super wide-angle lenses is known. Have this an unspecified field of vision caused by the pupil position is limited to certain hole shapes. Here is an optimal one Lighting according to product information 2000 from Mr. Richard Wolf "panoramic technoscope" hardly feasible.

The The invention has for its object a device of the beginning Specify the type mentioned, for the boreholes of different diameters and depth can be inspected without immersion in the borehole itself can.

According to the Object achieved with a device which the in claim 1 features specified.

advantageous Refinements are specified in the subclaims.

By the arrangement of the optical system will be a full inspection the borehole ensures without the optical system itself being immersed in the borehole must become. The invention is thus easy to use and enables full and reproducible inspection. This is achieved in that a two-stage imaging optical system with entrance pupil before the first effective area is applied. This position of the entrance pupil before the first optically effective surface can the perspective center lie in the hole. This broadens the captured field of view Limits variable. The modular design of the invention allows Combination of individual assemblies. By varying the front and The field of vision can be adapted to the shape of the borehole behind the system. In particular, the inspection of the bottom of the borehole and the inspection of the borehole cylinder is aimed for. The illumination reflection free design between the two systems is also possible of the incident light bright field illumination beam path, so that depending on Task Defects clearly stand out.

• 1. Durch Variation der beiden optisch abbildenden Teilsysteme kann entweder der Bohrlochgrund oder die Zylinderfläche des Bohrlochs vorrangig scharf auf den Sensor abgebildet werden.
• 2. Durch die Variation von Abständen, Brennweiten und Durchmessern der Bauteile des optischen Systems können verschiedene Bohrlochgrößen inspiziert werden können.
• 3. Der Auflicht-Hellfeld-Beleuchtungsstrahlengang kann zwischen den beiden Teilsystemen eingespiegelt werden, so dass durch Variationen der Lichtquelle und der Strahlablenkung der Inspektionsaufgabe optimal angepasst werden kann.
• 4. Bei Anordnung der Auflicht-Beleuchtung vor dem abbildenden System ist es möglich, auch die Lichtquelle der Inspektionsaufgabe optimal anzupassen.

The invention is characterized by a number of advantages. These include in particular:

• 1. By varying the two optically imaging subsystems, either the bottom of the borehole or the cylindrical surface of the borehole can be imaged primarily sharply on the sensor.
• 2. By varying the distances, focal lengths and diameters of the components of the optical system, different borehole sizes can be inspected.
• 3. The incident light brightfield illumination beam path can be reflected between the two subsystems, so that the inspection task can be optimally adapted by varying the light source and the beam deflection.
• 4. If the incident light lighting is arranged in front of the imaging system, it is also possible to optimally adapt the light source to the inspection task.

The The invention is explained in more detail below on the basis of an exemplary embodiment.

In the associated Drawing shows:

1 the schematic structure of the optical arrangement of the beam path and the cross section of a borehole to be inspected.

The optical arrangement for the inspection of boreholes consists of at least two optical systems, the front imaging system 1 and the rear imaging system 2 with which the borehole 3 to the recipient 6 is mapped. As receiver 6 a CCD or CMOS sensor is preferably used. The two imaging optical systems 1 and 2 are arranged so that the entrance pupil 4 for the entire system is mapped in front of the first optically effective surface. The optical systems 1 and 2 are by their heads planes and their focal points. In the example shown, the bottom of the borehole becomes 5 on the surface of the electronic receiver 6 displayed.

Additional incident light brightfield lighting can be used between the systems 1 and 2 via a suitable coupling device 7 be reflected. Partially transparent mirrors or prisms can be used for this. In the direction of light in front of the coupling device 7 can the illuminating beam path 8th influenced by additional lenses and adapted to the measurement object. In addition, it is possible to use ring lights 9 ensure high-contrast illumination of the borehole in front of the system.

1

front imaging system

2

rear imaging system

3

to inspecting borehole

4

common Entry pupil of the imaging systems

5

Base area of the bore hole

6

Area of electronic receiver

7

coupling system for reflected light brightfield lighting

8th

Reflected light bright field illumination beam path

9

Incident illumination in front of the imaging optics

Claims (4)

Device for examining mechanical components with depressions and / or openings, in particular for examining boreholes ( 3 ), characterized in that the device contains an imaging optical system consisting of a front imaging system ( 1 ) and a rear imaging system ( 2 ), which are variable in their mutual position, the entrance pupil ( 4 ) of the entire imaging system is imaged in front of the first optically effective area, the area of the borehole to be examined ( 3 ) to an electronic receiver ( 6 ) is mapped and means are arranged for coupling an illumination beam path into the optical image. Device according to claim 1, characterized in that the individual components have connection elements with which the parts of the two-stage imaging system and the means for coupling of the illumination beam path can be combined as desired. Apparatus according to claim 1 or 2, characterized in that the means for coupling the illumination beam path between the two subsystems ( 1 . 2 ) are arranged. Device according to claim 1 or 2, characterized in that that the means for coupling the illumination beam path before the first optically effective surface the device are arranged.