Abstract:
A spectrograph with a first concave spectrographic diffraction grating (16) is positioned to receive light from the input light source (12) is configured to provide a diffracted light output dispersing the components of the input light source in a first direction. The dispersion forms the input light into an intermediate spectrum. The intermediate spectrum is formed in a focal surface by the once diffracted light. A slit (18) is substantially positioned on the focal surface. A second concave diffraction grating (20) is positioned to receive once diffracted light from the slit and configured to provide a twice diffracted light output, the second concave diffraction grating dispersing the components of the input light source in a second direction. The second direction is different from the first direction, the dispersion forming the input light into an output spectrum.
Abstract:
The invention relates to spectrometer optics comprising a beam path from a radiation source to a number of electro-optical sensors without local resolution, the beam path having an entry slot (7), a dispersive element (8) and a number of exit slots (9) that are positioned on a focal curve. In addition, said optics are provided with a first actuator for modifying the angle of incidence ε (23) between the beam from the entry slot to the dispersive element and from the normal (13) to the dispersive element, a number of second actuators for displacing the exit slots tangentially to the focal curve (6) or in a peripheral direction along the focal curve (6) and a controller, which is designed to control the first actuator and the second actuators in order to carry out a calibration.
Abstract:
An optical detection device for validating bank rates has several input apertures, an imaging device (12), a diffraction grating (15.1, 15.2, 15.3) associated with each input aperture (11.1, 11.2, 11.3) and a detection array (17). The diffraction grating (15.1, 15.2, 15.3) is rotated at angle of e.g.45 degrees relative to the orientation of the linear detection array (17). This arrangement enables the spectra of multiple points to be measured simultaneously. The angle of rotation, the pitch of the apertures (11.1, 11.2, 11.3) and a pitch of the diffraction grating (15.1, 15.2, 15,3) are selected in such a way that the spectra of sad multiple points are contiguously mapped onto the detection array (17) has a single linear array of color sensitive detection pixels. The acxis of the linear array is offset with respect to an optical axis (7) of the optical detection device.
Abstract:
The invention relates to an assembly for identifying coatings (3; 14) lying on the surface of components or objects (2) and for determining the chemical characteristics and the surface properties of said coatings (3; 14). The assembly comprises a light source (4) for illuminating the coating (3; 14) on the component surface that is to be analysed and means for projecting light from the light source (4) via the surface (3') of the coating (3; 14) that is to be analysed onto an entry slit (7). The light from the entry slit (7) is projected onto a two-dimensional detector unit (8) in a wavelength-dependent manner by means of a grating (10). An evaluation unit (11), which is electrically connected to the detector unit (8) evaluates and processes the signals emitted by the illuminated detector elements (9) of the detector unit (8).
Abstract:
Filtereinheit (10) zum Filtern von Licht, wobei eine erste Maske (3), eine Prismeneinheit (7) und eine zweite Maske (8) vorgesehen sind. Die Prismeneinheit (7) ist zwischen den beiden Masken (3, 8) angeordnet, wobei die erste (3) und die zweite Maske (8) korrespondierende Öffnungen aufweisen und ein Öffnungspaar bilden. Für mindestens ein Öffnungspaar ist ein Prisma in der Prismeneinheit (7) vorgesehen. Damit wird eine präzise und schmalbandige Filtereinheit erhalten. Des Weiteren sind eine Anordnung mit der Filtereinheit sowie eine Vorrichtung zum Erfassen von Bildern angegeben.
Abstract:
A spectrophotometer comprises selection means for selecting one or more of the components of a light beam corresponding to different wavelengths, formed by optical micro-filters (20).
Abstract:
An optical detection device for validating bank rates has several input apertures, an imaging device (12), a diffraction grating (15.1, 15.2, 15.3) associated with each input aperture (11.1, 11.2, 11.3) and a detection array (17). The diffraction grating (15.1, 15.2, 15.3) is rotated at angle of e.g.45 degrees relative to the orientation of the linear detection array (17). This arrangement enables the spectra of multiple points to be measured simultaneously. The angle of rotation, the pitch of the apertures (11.1, 11.2, 11.3) and a pitch of the diffraction grating (15.1, 15.2, 15,3) are selected in such a way that the spectra of sad multiple points are contiguously mapped onto the detection array (17) has a single linear array of color sensitive detection pixels. The acxis of the linear array is offset with respect to an optical axis (7) of the optical detection device.
Abstract:
Bei einem optischen Spektrometer (1) mit einem Beugungsgitter (2), mit einem das einfallende Licht (5) auf das Beugungsgitter (2) abbildenden Eingangsspalt (4), mit einem das am Beugungsgitter (2) gebeugte Licht wellenlängenselektierenden Ausgangsspalt (8) und mit einer Einrichtung zum Variieren der Bandbreite des Spektrometers (1) ist als Einrichtung zum Variieren der Bandbreite ein optisches Element (11), z.B. eine variable Blende, im Strahlengang zwischen dem Eingangsspalt (4) und dem wellenlängenselektierenden Ausgangsspalt (8) angeordnet, das die Fleckgröße des gebeugten Lichts am Ausgangsspalt verändert. Die Bandbreite der durch den Ausgangsspalt durchgelassenen Wellenlängenanteile, d.h. die Bandbreite des Spektrometers, wird durch unterschiedliche spektrale Auflösungen des Beugungsgitters variiert.
Abstract:
The invention relates to a device for simultaneously detecting several spectral ranges of a light beam (1), especially for detecting the light beam (1) of a laser scanner (2) in the detection beam path of a confocal microscope. In order to realize a simple construction having a small overall height while avoiding the defocusing effect, the invention is characterized by having an arrangement (3) provided for a spectral fanning out of the light beam (1) and by having an arrangement (4) for splitting the fanned out beam (5) out of the dispersion plane (6) and into spectral ranges (7, 8, 9). Afterwards, a subsequent detection of the fanned out spectral ranges (7, 8, 9) is carried out.