A light detecting device is provided with: a filter array including filters arranged two-dimensionally, each of the filters having a light-incident surface and a light-emitting surface, the filters including multiple types of filters having mutually different transmission spectra; and an image sensor having a light-detecting surface facing the light-emitting surface, the image sensor being provided with light-detecting elements arranged two-dimensionally on the light-detecting surface, wherein the distance between the light-emitting surface and the light-detecting surface is different for each of the filters.

A system and method for characterization and/or calibration of performance of a multispectral imaging (MSI) system equipping the MSI system for use with a multitude of different fluorescent specimens while being independent on optical characteristics of a specified specimen and providing an integrated system level test for the MSI system. A system and method are adapted to additionally evaluate and express operational parameters performance of the MSI system in terms of standardized units and/or to determine the acceptable detection range of the MSI system.

A sensor window may include a substrate and a set of layers disposed onto the substrate. The set of layers may include a first subset of layers of a first refractive index and a second set of layers of a second refractive index different from the first refractive index. The set of layers may be associated with a threshold transmissivity in a sensing spectral range. The set of layers may be configured to a particular color in a visible spectral range and may be associated with a threshold opacity in the visible spectral range.

A snapshot hyperspectral imaging method includes the steps of: S1, selecting a set of reference wavelengths for calibration, rectifying the shifted positions due to dispersion at each reference wavelength, and selecting a center wavelength; S2, estimating relative dispersion at each reconstructed wavelength with respect to the center wavelength; S3, generating a dispersion matrix describing the direction of dispersion, and generating a spectral response matrix using a spectral response curve of a sensor; S4, capturing images blurred with dispersion; S5, deblurring the dispersed images captured in S4 using the dispersion matrix and the spectral response matrix generated in S3 to obtain spectral data spatially aligned in all spectrums; and S6, projecting the aligned spectral data obtained in S5 into color space, extracting a foreground image by a threshold method, sampling the dispersed images obtained in S4 as strong prior constraints for the foreground image, and reconstructing accurate spatial hyperspectral data.

A device may include a sensor window. The sensor window may include a substrate. The sensor window may include a set of layers disposed onto the substrate. The set of layers may include a first subset of layers of a first refractive index and a second set of layers of a second refractive index different from the first refractive index. The set of layers may be associated with a threshold transmissivity in a sensing spectral range, and may be configured to a particular color in a visible spectral range and associated with a threshold opacity in the visible spectral range. The device may include a spectral sensor device aligned to the sensor window and including at least one sensor element to receive light in the sensing spectral range and provide a plurality of sensing functionalities based on at least one measurement of the light in the sensing spectral range.

An imaging system includes a first optical system configured to receive an imaging beam from a surgical region. The imaging beam including a first wavelength band and a second wavelength band. The imaging beam is directed along a first optical axis. The first optical system includes a dichroic beam splitter, and the first optical system is configured to direct a first optical beam associated with the first wavelength band along a first direction and direct a second optical beam associated with the second wavelength band along a second direction. The imaging system also includes a first sensor located along the first direction and configured to capture a first image associated with the first optical beam. The image system further includes a first relay lens system located along the second direction downstream from the first optical system and configured to receive the second optical beam.

Disclosed is an instrument including a multipath, monolithic optical component, made up of a portion of a transparent material between two opposite faces of the component. One of the two faces of the component is formed by a first refracting surface, and the other face includes several second refracting surfaces which are juxtaposed. Each optical path of the component is formed by one of the second refracting surfaces in combination with a corresponding portion of the first refracting surface. One such component is suited for being part, within the instrument, of a detection module with multiple optical paths arranged in parallel, with a matrix photodetector shared by the optical paths. Such a detection module may be compact enough in order to be integrated into a cryostat cold screen, improving cooling thereof, and may be combined with an objective in order to form an instrument with multiple optical paths.

Provided are a light detection element, a receiving device, and a light sensor device. The light detection element includes a magnetic element that includes a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer interposed between the first ferromagnetic layer and the second ferromagnetic layer, wherein the first ferromagnetic layer is irradiated with light in a direction intersecting a stacking direction of the magnetic element.

A spectroscopic camera includes: a spectral filter having an optical area that transmits light with a predetermined wavelength from incident light; an image sensor receiving transmitted light transmitted through the spectral filter; and a casing accommodating the spectral filter and the image sensor. A direction in which the incident light enters is a first direction. The casing includes: a cylindrical lens mount which a lens that the incident light enters is attachable to and removable from and which has a center axis along the first direction; a wall having an aperture that has an aperture center coaxial with the center axis of the lens mount and that is smaller than a cylindrical inner diameter of the lens mount and equal to or smaller than an outer diameter of the optical area; a filter accommodation unit accommodating the spectral filter at such a position that the optical area covers the aperture, as viewed in a plan view along the first direction; and an imaging sensor accommodation unit provided downstream of the filter accommodation unit in the first direction and accommodating the image sensor at such a position that the image sensor overlaps the aperture as viewed in the plan view.

Provided herein is an infrared spectroscopy technique capable of performing spectroscopic analysis on infrared rays in a broad infrared range (including a near infrared range, a short infrared range, a mid-infrared range, a far infrared range, and an extreme infrared range). An apparatus and a method for spectroscopic analysis on infrared rays are provided, without using an image sensor having a limited response range, to generate a signal in which transmitted light for each wavelength passes through a plurality of filters having different transmittances for each wavelength and is spatially pattern-coded, restore the signal into an infrared transmittance image, discriminate a wavelength according to a transmittance of the filter from the infrared transmittance image, calculate an intensity of the light for each wavelength, and output infrared spectrum information.