Abstract:
Embodiments provide an integrated miniature polarimeter and spectrograph (IMPS) and associated methods for using an IMPS to determine Stokes parameters to describe a source beam. In one embodiment an IMPs is provided comprising a spectropolarimeter module. The spectropolarimeter module comprises a miniature optical bench; a slit component; a birefringent wedge; a dichroic prism; a spectral disperser; and a focal plane array. The slit component, birefringent wedge, dichroic prism, spectral disperser, and focal plane array are mounted to the miniature optical bench such that a beam incident on the slit component will be incident on (1) the birefringent wedge, (2) the dichroic prism, (3) the spectral disperser, and (4) the focal plane array, in that order.
Abstract:
A spectral instrument including a light source configured to produce a light beam, the light beam comprising a plurality of wavelengths, and the light beam being about collimated or pseudo-collimated. The spectral instrument also includes a spectral dispersion device in optical communication with the light source. The spectral instrument also includes a screen disposed in the optical path after the spectral dispersion device. The screen comprises a material configured to be substantially opaque to at least some of the plurality of wavelengths. The screen is sized and dimensioned to at least partially block selected ones of the plurality of wavelengths. The screen is movable with respect to an axis of the screen. The spectral instrument also includes an imaging lens disposed in the optical path and disposed either after the screen or before the screen.
Abstract:
Die Erfindung betrifft ein konfokales Spektrometer, mit einer breitbandigen Lichtquelle, einer vor der Lichtquelle angeordneten drehbaren ersten Blendenvorrichtung mit einer strukturierten Anordnung einer Vielzahl von Durchgangslöchern, welche dazu ausgelegt ist, das Gesichtsfeld eines abzubildenden Objekts durch die Lichtquelle zu beleuchten, einer Abbildungsoptik, welche dazu ausgelegt ist, ein Abbild der strukturierten Anordnung der Vielzahl von Durchgangslöchern auf das Objekt zu fokussieren, einem Dispersionselement, welches dazu ausgelegt ist, das von dem Objekt reflektierte Licht entlang einer Dispersionsachse senkrecht zu der optischen Achse der Abbildungsoptik spektral zu dispergieren, und einer Detektoreinrichtung, welche dazu ausgelegt ist, das spektral dispergierte reflektierte Licht zum Erzeugen eines spektral aufgelösten Bildes des Objekts zu erfassen.
Abstract:
Non-invasive monitoring of blood constituents such as glucose, ketones, or hemoglobin A1c may be accomplished using near-infrared or short-wave infrared (SWIR) light sources through absorbance, diffuse reflection, or transmission spectroscopy. As an example, hydro-carbon related substances such as glucose or ketones have distinct spectral features in the SWIR between approximately 1500 and 2500nm. An SWIR super-continuum laser based on laser diodes and fiber optics may be used as the light source for the non-invasive monitoring. Light may be transmitted or reflected through a tooth, since an intact tooth and its enamel and dentine may be nearly transparent in the SWIR. Blood constituents or analytes within the capillaries in the dental pulp may be detected. The non-invasive monitoring device may communicate with a device such as a smart phone or tablet, which may transmit a signal related to the measurement to the cloud with cloud-based value-added services.
Abstract:
A dual pass monochromator for generating excitation radiation and isolating emission radiation at prescribed wavelengths, useful for analyzing florescence in multi-assay micro-titer plate readers is disclosed. The optically dispersive element can be used to receive radiation through an entrance aperture; isolate a prescribed wavelength band; and then direct the prescribed wavelength band through a first exit aperture onto a sample. The excited emissions from the sample can then be received back through the first exit aperture and be directed to the optically dispersive element to isolate the emission wavelength band and direct it onto a detector through a second exit aperture. Band pass elements can be optically coupled to the optically dispersive element to tune the excitation and emission wavelength bands. Band pass optical elements can be dispersive diffraction gratings, or non-dispersive optical filters. The dual pass monochromator can be modular and include a number of optically isolated compartments.
Abstract:
A spectrographic device which may be used as a monochromator, a spectrograph, a spectrometer or a colorimeter. A monochromator or spectrograph type optical device comprising at least one collimator (1), at least a first scatterer (2), and a second scatterer (3) performing scattering in a substantially perpendicular direction relative to the scattering direction of the first scatterer, one of said scatterers consisting of an échelle network. Said device comprises reflectors so that the beams pass twice through said first and second scatterers and said collimator. The device may be used in the field of optical devices for general use in spectrography.
Abstract:
The invention relates to a spectrometer comprising a combination of at least one grid (1) and at least one prism (2), characterised in that total reflexion is used to produce a compact spectrometer in at least one prism (2).
Abstract:
The invention relates to a confocal spectrometer comprising a broadband light source, a first aperture device arranged rotatably in front of the light source and having a structured arrangement of a plurality of through holes, which is designed to illuminate by means of the light source the visual field of an object to be imaged, an imaging optical system that is designed to focus an image of the structured arrangement of the plurality of through holes onto the object, a dispersion element that is designed to spectrally disperse the light reflected by the object along a dispersion axis perpendicular to the optical axis of the imaging optical system, and a detector device that is designed to capture the spectrally dispersed reflected light for producing a spectrally resolved image of the object.
Abstract:
The invention relates to a spectrometer assembly (10) containing: a radiation source (11) with a continuous spectrum; a pre-monochromator (2) for generating a spectrum with relatively little linear dispersion, from which a spectral segment can be selected, whose spectral bandwidth is less than or equal to the bandwidth of the free spectral range of the order in the echelle spectrum, for which the mean wavelength of the selected spectral segment can be measured with a maximum blaze efficiency; an echelle spectrometer (4) comprising means for wavelength calibration; an entry slit (21) on the pre-monochromator (2) and an intermediate slit assembly (3) comprising an intermediate slit and a local resolution radiation receiver (5) on the exit plane of the spectrometer for detecting wavelength spectra. The assembly is characterised in that the width of the intermediate slit (3) is greater than the monochromatic image of the entry slit generated by the pre-monochromator at the location of the intermediate slit and that means are provided for calibrating the pre-monochromator, by means of which the radiation that is reproduced in the detector of the radiation source with a continuous spectrum can be calibrated to a reference position.
Abstract:
The invention concerns an optical component (1), which comprises preferably two prisms (2, 3) and an intermediate transmission grating (4). The radiation is directed by means of the prisms (2, 3) and the radiation is dispersed or collated by means of a grating (4) with big dispersion to direct the wished radiation wavelengths into wished directions.