Abstract:
A detector (110) for determining a position of at least one object (112) is proposed. The detector (110) comprises: - at least one optical sensor (114), wherein the optical sensor (114) has at least one sensor region (136), wherein the optical sensor (114) is designed to generate at least one sensor signal in a manner dependent on an illumination of the sensor region (136) by illumination light traveling from the object (112) to the detector (110), -at least one beam-splitting device (129), wherein the beam-splitting device (129) is adapted to split the illumination light in at least two separate light beams (139), wherein each light beam travels on a light path to the optical sensor (114), -at least one modulation device (137) for modulating the illumination light, wherein the at least one modulation device (137) is arranged on one of the at least two light paths, -at least one evaluation device (142), wherein the evaluation device (142) is designed to generate at least one item of information from the at least one sensor signal (114), in particular at least one item of information about the distance and/or the color of the object (112).
Abstract:
A measurement apparatus comprises: a light emitting means for emitting a light; a light receiving means for receiving a reflected light from a measurement target, and outputting spectral reflectance information, the light receiving means comprises a plurality of light-receiving elements; a determination means for determining correction information based on a first signal which is output by a predetermined light-receiving element of the plurality of light-receiving elements in a first state in which the light emitting means does not emit a light and a second signal which is output by the predetermined light-receiving element in a second state in which the light emitting means emits a light; and a correction means for correcting the spectral reflectance information output by the light receiving means based on the correction information determined by the determination means.
Abstract:
A holographic polymer dispersed liquid crystal (HPDLC) tunable filter exhibits switching times of no more than 20 microseconds. The HPDLC tunable filter can be utilized in a variety of applications. An HPDLC tunable filter stack can be utilized in a hyperspectral imaging system capable of spectrally multiplexing hyperspectral imaging data acquired while the hyperspectral imaging system is airborne. HPDLC tunable filter stacks can be utilized in high speed switchable optical shielding systems, for example as a coating for a visor or an aircraft canopy. These HPDLC tunable filter stacks can be fabricated using a spin coating apparatus and associated fabrication methods.
Abstract:
A colour optical measurement instrument for colour formulations and defining the camouflage property of a sample is operating in the wavelength range of 350nm to 1100nm. The colour difference in the visible range and in near infrared range is quantified. The instrument is equipped with an illuminition source, an integrating sphere in case of D8 geometry, a detector with an optical assembly between the source and the sample. A variable sample aperture is provided for proper optical focussing.
Abstract:
A color measurement instrument is used as a shade card generator and printer. Spectral geometries of D/8, D/0, 45/0, 0/45, D(hemisphere)/8, D(hemisphere)/0 or others are applied. The light spectrum of the illumination source (2) lies in the range of 350 - 1100 nm. An integrating sphere (3) is used in the case of D/8 geometry. A detector (7.5) and an optical assembly (7.2, 7.3, 7.4) using a variable sample aperture are between the light source (2) and the sample.
Abstract:
The present invention relates to spectral analysis systems and methods for determining physical and chemical properties of a sample by measuring the optical characteristics of light emitted from the sample. In one embodiment, a probe head for use with a spectrometer includes a reflector for illuminating a sample volume disposed circumferentially about the light source of the probe head. In another embodiment, a probe head includes an optical blocking element for forcing the optical path between the light source and an optical pick-up optically connected to the spectrometer into the sample. The probe head also includes a reference shutter for selectively blocking light emitted from the sample from reaching the optical pick-up facilitate calibration of the spectrometer.
Abstract:
Percentage concentrations of constituents or color components of a sample are determined using a spectral analyzer with a wide illumination spot size and detector. The analyzer irradiates the sample, picks up diffuse reflectance of individual wavelengths from the sample and spatially separates the diffuse reflectance into a response at individual wavelengths. The result is to simultaneously detect the intensities of the individual wavelengths in parallel from the sample being analyzed. Percentage constituents of a composite substance can be determined or, alternatively, the components of color in a sample can be determined by analyzing wavelengths of reflected light.
Abstract:
An optical sensor system is provided which provides portions of the intensity spectrum of various types of natural and artificial light and combinations thereof. The illumination passes through a series of bandpass filters (116A to 116E, 228, 232) or through a diffraction grating (152, 234) to be sensed by a plurality of photosensors (110A to 110E) sensing different portions of the spectrum. The photosensors (110A to 110E) are connected to a processing system (124) which can determine the nature of the illuminants from characteristic areas of the intensity spectrum falling on the photosensors (110A to 110E). A camera (210) is provided which has an optical sensor which can respond to natural, artificial light, and a combination thereof by bandpass filtering or spectrum diffraction and electronic processing to allow compensation for color differences in an image taken by the camera caused by the illumination.