Abstract:
A method and system for optimizing a match between the color of an in-line part manufactured by a plastic product production machine and the color of a reference part by adjusting the concentration of masterbatch in the mixture of raw material fed to the plastic product production machine. The optimization of the color is based on spectra of the in-line part and reference part obtained within a short time interval using the same spectrometer, thereby eliminating the requirement for high accuracy spectrometer calibration and allowing the method, which determines the rates at which the base masterbatches are added to the raw material, to be carried out in real time on the manufacturing floor while the plastic product production machine is being operated to manufacture in-line parts.
Abstract:
This invention concerns spectroscopy apparatus comprising a light source (101) arranged to generate a light profile (110) on a sample, a photodetector (103) having at least one photodetector element (104) for detecting characteristic light generated from interaction of the sample with light from the light source (101), a support (109) for supporting the sample, the support (109) movable relative to the light profile (110), and a processing unit (121). The processing unit (121) is arranged to associate a spectral value recorded by the photodetector element (104) at a particular time with a point on the sample predicted to have generated the characteristic light recorded by the photodetector element (104) at the particular time based on relative motion anticipated to have occurred between the support (109) and the light profile (110).
Abstract:
An optical spectrometer 1 comprises a photodiode 2 and a straining mechanism 4 for imposing adjustable strain on the photodiode. The spectrometer 1 includes measurement apparatus 7 for measuring variation of photocurrent with strain at different values of the adjustable strain imposed by the straining mechanism 4. Adjusting the strain allows adjustment of the band gap E g of the photosensitive region of the photodiode 1, and this determines the cut-off energy for absorption of photons. Measuring variation of photocurrent with strain at different values of the adjustable strain imposed by the straining mechanism allows study of photons within a desired energy range of the band gap energy corresponding to each strain value.
Abstract:
A method of calibrating a spectral imaging system is disclosed. The spectral imaging system comprises an interferometer having a beam splitter and at least a first reflector and a second reflector. The method comprises: obtaining data pertaining to an interference pattern model, operating the spectral imaging system to provide an interference pattern of a received light beam, and varying a relative orientation between at least two of: the beam splitter, the first reflector and the second reflector, until the interference pattern of the input light beam substantially matches the interference pattern model.
Abstract:
The present invention relates generally to a methodology of determining the concentration of the types of melanin, either eumelanin or pheomelanin, in the skin wherein the process for such determination is non-invasive and based on digital signal and image analysis of hyperspectral sensing and multi-spectral data.
Abstract:
Mikroskop, insbesondere Laser Scannung Mikroskop, zur optischen Erfassung von in einer Probe angeregter Lichtstrahlung, mit einem Detektionsstrahlengang zur Detektion von Spektralanteilen der Lichtstrahlung in mehreren Detektionskanälen, wobei die Lichtstrahlung auf einen variablen Lang- oder Kurzpassfilter gelangt von dem reflektierte und / oder transmittierte Anteile mit einem Parallelversatz rückgespiegelt werden und diese nach mindestens einer solchen Rückreflektion auf einen Detektor gelangen.
Abstract:
The present invention relates to a wavelength-tunable spectrometer for achieving optimum efficiency for the wavelength of applied light even without replacing a diffracting grating or operating an observation part, and to a wavelength tuning method thereof. To this end, a transmission-type diffracting plate is arranged to be rotatable to provide an incident light for achieving optimum efficiency for the light wavelength of an external source to be observed, and a mirror is arranged to provide light in the same output path irrespective of the rotation of the diffracting plate and the wavelength variation of the incident light, the diffraction angle of which might otherwise vary in accordance with the rotation of the transmission-type diffracting plate and the incident light wavelength. Whereby, the present invention acquires a spectrum of incident light at optimum diffraction efficiency according to the wavelength of the incident light even without moving a camera for observation or replacing a diffracting plate, thus reducing the size of the spectrometer, the cost thereof, and the possibility of the spectrometer breaking down.