The arrangement comprises a filter region (10) filtering electromagnetic radiation and a shielding component (20) inhibiting propagation of electromagnetic radiation. The filter region comprises a central filter region (11) and a separate peripheral filter region (13). The shielding component comprises an aperture (21). The aperture is arranged above the central filter region. The central filter region and the peripheral filter region are optimized for different angles of incidence (α, β) and provided for measurements by individual sensor regions (18, 19).

A processing apparatus, comprises: a first acquirer configured to acquire a first specific information distribution of an object based on acoustic waves propagating from the object onto which light is irradiated; a second acquirer configured to acquire a characteristic value of the first specific information distribution of the object; a third acquirer configured to acquire information indicating a correspondence between an optical coefficient and the characteristic value of the first specific information distribution; and a fourth acquirer configured to acquire the optical coefficient of the object using the characteristic value of the first specific information distribution of the object and the information indicating the correspondence.

The present invention discloses a low-orbit satellite-borne image-spectrum associated detection method and payload. The method includes: (1) detecting and tracking moving targets and dynamic phenomena based on a pixel offset compensation method; and (2) performing multi-dimensional characteristic analysis on infrared spectra of the moving targets and the dynamic phenomena, to identify the moving targets and the dynamic phenomena. The payload includes a two-dimensional servo turntable, an infrared reflector, a multispectral infrared optical system, an infrared imaging unit, a broadband infrared spectrum measuring unit, a data processing unit and a control unit. The present invention can achieve coaxiality of an infrared imaging optical path and a short/medium/long wave infrared spectrum measuring optical path, detect infrared image information and infrared spectra of moving targets and dynamic phenomena simultaneously and realize automatic detection, tracking, spectrum measurement and identification of multiple moving targets and dynamic phenomena in a scene, and has high identification efficiency and high tracking and positioning accuracy.

A spectrometer device includes an optical interference filter which is designed to filter specific wavelength ranges of an incident light beam on passage through the optical interference filter. The spectrometer device also includes a detector device which is designed to detect the filtered light beam. Further, the spectrometer device includes a focusing device with a reflective surface. The focusing device is designed to focus the filtered light beam onto the detector device by reflection on the surface.

Described herein is a spectrometer device for optical analysis of at least one sample. The spectrometer device includes: at least one housing having at least one entrance window; at least one wavelength-selective element configured for separating incident light into a spectrum of constituent wavelengths, the wavelength-selective element being disposed within the housing; at least one detector device configured for detecting at least a portion of the constituent wavelengths, the detector device being disposed within the housing; and at least one contact sensor device for detecting a contact of the spectrometer device with the sample, where the contact sensor device includes at least one optical contact sensor device, where the optical contact sensor device is configured to detect an influence of the presence of the sample onto the transmission of the optical signal.

The invention provides an optical coupling, comprising: a first coupling portion and a second coupling portion, the first and second coupling portions configured to mate in kinematic constraint via a first mounting interface and at least two further mounting interfaces, wherein: the first coupling portion comprises a first mounting element and the second coupling portion comprises a socket, and the first mounting element is receivable in the socket at the first mounting interface such that the first mounting interface constrains lateral displacements of the first coupling portion relative to the second coupling portion when mated; and at least one optical channel for transmitting abeam of light along an optical axis through the optical coupling, the optical channel comprising complementary light-transmitting ports in the first and second coupling portions, wherein the optical axis is not laterally removed from the first mounting interface by more than half the distance between the first mounting interface and the nearest of the further mounting interfaces.

An example system includes a light source, a first spectrometer, a second spectrometer, and an electronic control module. The light source is operable to emit light within a first range of wavelengths in a field of illumination. The first spectrometer is operable to measure first sample light reflected from an object within a second range of wavelengths and in a first field of detection. The second spectrometer is operable to measure second sample light reflected from the object within a third range of wavelengths and in a second field of detection. The electronic control module operable to determine, based on the measured first sample light and the measured second sample light, a distance between the system and the object, and determine, based on the measured first sample light and the measured second sample light, a spectral distribution of light corresponding to the object.

Methods and system for chromatic confocal microscopy are described. One example chromatic confocal microscope system includes a hyperchromatic objective lens configured to focus the light of different wavelengths onto different corresponding focal planes that are separated from one another within a sample object, focusing optics positioned to receive multi-spectral light reflected from the sample object after passing through the hyperchromatic objective lens, a detection slit to receive light from the focusing optics and to block at least a portion of light that is incident thereon, and a grating positioned to receive light after passing through the detection slit and to produce spatially separated light of different wavelengths to enable the detection of spatially separated light by an imaging sensor. The described chromatic confocal microscopes may be used to develop low-cost chromatic confocal endoscopes for disease diagnosis of human internal organs in vivo.

There are disclosed methods and apparatus (10) for measuring Raman spectral features (52) of a sample (12), from which background light of variable intensity is also received, for example due to the incidence of ambient light (14) or due to variable fluorescence. Detection pixels (42) and storage pixels (44) are defined on a CCD device (40). Laser probe light (22) is directed to the sample. In a repeated cycle of first and second intervals, in each first interval background light is received at detection pixels, and in each second interval both background light and scattered laser probe light is received at the detection pixels. The accumulated signal from each of the first and second intervals is retained in the storage pixels during the second and first intervals respectively. In other aspects laser probe light is directed to the sample during both of the first and second intervals, but has a different wavelength in each interval.

A spectroscopic unit includes a housing, a light incident portion provided in the housing, a Fabry-Perot interference filter arranged in the housing and having a first mirror and a second mirror, a distance between the first mirror and the second mirror being variable. The light incident portion includes an aperture portion in which an aperture is formed and a band pass filter arranged between the aperture and the Fabry-Perot interference filter. The aperture portion is configured so that a value obtained by dividing a length of the aperture in a facing direction of the first mirror and the second mirror by a width of the aperture in a direction perpendicular to the facing direction is equal to or more than 0.5 and the entirety of light passing through the aperture is incident on the band pass filter.