Abstract:
A method of determining optical properties of textured surfaces by irradiation of the surface to be investigated. At least part of the radiation irradiated onto the surface and reflected by the latter is detected by a detector device which permits a location-resolved evaluation of the radiation striking it. A first characteristic value from the radiation detected, characteristic of a texture of the surface is detected. A second characteristic value from the radiation detected, characteristic of a further optical property of the surface is detected. And, a result value is determined on the basis of the first characteristic value and the second characteristic value.
Abstract:
An apparatus (1) for analysing surface properties, comprising a first radiation device (4) which emits radiation directly onto a surface (9) to be analyzed, a first illumination device (6, 7) for indirectly illuminating the surface (9) to be analyzed, a first radiation detector device (8) which receives at least part of the radiation thrown back from the surface (9) to be analyzed and outputs at least one signal which is characteristic of this part of the radiation. According to the invention, a radiation scattering device (10, 11) is provided which is at least partially illuminated by the first illumination device (6, 7) and which transmits scattered radiation onto the surface (9) to be analyzed.
Abstract:
A device for examining the optical properties of surfaces includes a first radiation source which emits radiation to an examination surface, at least one first detector device, for detecting the radiation reflected off the surface and emitting at least one signal that is characteristic of at least one parameter of the detected radiation, wherein the detector device includes a plurality of image capturing components arranged in a specified detection area and wherein a control is provided for compensating signal changes caused by a shift of the location where the reflected radiation is incident on the detection area.
Abstract:
A device for examining the optical properties of surfaces includes at least one first radiation device which emits radiation to a surface to be examined at a first predetermined spatial angle; at least one first detector device for capturing the radiation emitted to and reflected back from the surface, wherein the first detector device, allowing a local resolution of detected radiation, is positioned at least at a second predetermined spatial angle relative to the surface; and at least one further radiation device or second detector device emitting radiation to the surface to be examined at a third predetermined spatial angle or detecting radiation emitted to and reflected back from the surface.
Abstract:
The present invention relates to a device and method for making quantified determinations of the quality of surfaces and wherein the device comprises an optical system with a first optical means and a second optical means as well as a control and evaluation means and an output (display) means. Said first optical means comprises an illuminating means having at least one LED as its light source and serves the function of illuminating the measurement surface at a predetermined angle. Said second optical means is likewise directed at a predetermined angle to the measurement surface and receives the reflected light. A photo sensor of said second optical means emits an electrical measurement signal which is characteristic of said reflected light.The light emitted from the illuminating means is configured such that its spectral characteristic comprises blue, green and red spectral components in the visible light spectrum. A filter means is arranged in the path of radiation between the light source and the photo sensor and which changes the spectral characteristics of the incident light so as to approach a predetermined spectral distribution. The control and evaluation means control the measurement sequence and evaluate the reflected light, deriving therefrom at least one parameter which is characteristic of the surface.
Abstract:
A method of determining properties of textured surfaces with the steps: irradiation of radiation onto the surface (10) to be investigated; detection of at least part of the radiation irradiated onto the surface (10) and reflected by the latter by means of a detector device (4) which permits a location-resolved evaluation of the radiation striking it; determination of a first characteristic value (ΔP) from the radiation detected, wherein the first characteristic value (ΔP) is characteristic of a texture of the surface (10); determination of a second characteristic value (ΔE) from the radiation detected, wherein the second characteristic value is characteristic of a further optical property of the surface (10); determination of a result value (ΔI) on the basis of the first characteristic value (ΔP) and the second characteristic value (ΔE).
Abstract:
A device for examining the optical properties of surfaces includes at least one first radiation device emitting radiation to a surface to be examined at least at a first predetermined spatial angle, at least one first detector for capturing the radiation emitted to and reflected back from the surface, wherein the detector, allowing a local resolution of detected radiation, is positioned at least at a second predetermined spatial angle relative to the surface. At least one spatial angle at which the radiation device and/or the detector are positioned, is variable and the radiation device and the detector are positioned in a space at least part of which exhibits light-reflecting properties.
Abstract:
A device for examining the optical properties of surfaces includes at least one first radiation device which emits radiation to a surface to be examined at a first predetermined spatial angle; at least one first detector device for capturing the radiation emitted to and reflected back from the surface, wherein the first detector device, allowing a local resolution of detected radiation, is positioned at least at a second predetermined spatial angle relative to the surface; and at least one further radiation device or second detector device emitting radiation to the surface to be examined at a third predetermined spatial angle or detecting radiation emitted to and reflected back from the surface.
Abstract:
A device for determining properties of surfaces having at least one first radiation device having at least one radiation source emitting radiation, having at least one first radiation detector having a first radiation detector element which captures at least a portion of the radiation emitted from the radiation device and subsequently diffused and/or reflected off a measuring surface and emits at least one measuring signal characteristic of the reflected/diffused radiation, and at least one second radiation detector having a second radiation detector element capturing a portion of the radiation from the radiation device and diffused/reflected off a measuring surface and outputs a measuring signal characteristic of the reflected and/or diffused radiation, and at least one filter device which is placeable both in the optical path between the radiation device and the first radiation detector and in the optical path between the radiation device and the second radiation detector.