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AssigneeInstrument Systems Optische Messtechnik GmbH
InventorsMatthias Hoeh, Reto Haring, Florian Schewe, Martin Mangstl, Thorsten Kopp
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The invention relates to a method for monitoring a spectroradiometer (4), in particular for measuring light-emitting test objects (1), in which the spectral data of the test objects (1) are captured by means of an optical system, wherein the radiometric, photometric and/or colorimetric quantities of the test objects (1) are ascertained from the spectral data. The problem addressed by the invention is that of specifying a method for monitoring a spectroradiometer (4), where it is not the continuous recalibration of the spectroradiometer (4) but the monitoring of when a calibration is necessary that is paramount. The invention solves this problem by virtue of changes in the wavelength scale, in the light throughput and/or in the spectral sensitivity of the spectroradiometer (4) being detected by way of a reference light source (5), integrated into the optical system, with a defined spectrum. Optionally, at least one detector integrated into the optical system can additionally monitor the stability of the reference light source (5). Moreover, the invention relates to a device for carrying out the method.
A method for monitoring a spectroradiometer (4) used to measure light-emitting test objects (1), in which the spectral data of the test objects (1) are acquired by means of an optical system, wherein radiometric, photometric and/or colorimetric variables of the test objects (1) are determined from the spectral data, wherein changes in the wavelength scale, in the light throughput and/or in the spectral sensitivity of the spectroradiometer (4) are detected by a reference light source (5) integrated in the optical system and wherein the light of the test object (I) is received by the optical system as the receiving optics, which comprises a measuring head (3) that is connected to the spectroradiometer (4) via an optical connection, as well as an objective (51) and an image sensor (52), wherein a portion of the light of the test object (1) is supplied to the spectroradiometer (4) by means of a beam splitter (53) via the optical connection and wherein the reference light source (5) is integrated in the measuring head (3) and has a known spectrum by means of which the calibration of the spectroradiometer is monitored, wherein the stability of the reference light source (5) is monitored by means of the image sensor (52).
A device for monitoring a spectroradiometer (4) used to measure light-emitting test objects (1), comprising a spectroradiometer (4) and an optical system, coupled to said spectroradiometer (4), as receiving optics for light originating from a test object (1), wherein a reference light source (5) is integrated into the receiving optics, wherein the receiving optics further comprise a measuring head (3) that is connected to the spectroradiometer (4) via an optical connection, as well as an objective (51) and an image sensor (52), wherein a beam splitter (53) is configured to supply a portion of the light of the test object (1) to the spectroradiometer (4) via the optical connection, and wherein the reference light source (5) is integrated in the measuring head (3) and has a known spectrum by means of which the calibration of the spectroradiometer is monitored.
Dependencies are inferred from the claim text.