A multi-spectral imaging (MSI) device can include an imaging plane and a diffractive optic. The imaging plane can include at least two groups of pixels an array of pixels for sensing at least two spectral bands. The at least two spectral bands can include a first spectral band and a second spectral band. The diffractive optic can be configured for diffracting an electromagnetic wave into the at least two spectral bands and focusing each spectral band component of the electromagnetic wave onto the group of pixels for the spectral band to generate an image.

The present disclosure relates to an atomic absorption spectrometer for analyzing a sample, including a radiation source unit for generating a measuring beam, an atomization unit for atomizing the sample such that the atomized sample is located in a beam path of the measuring beam, and a detecting unit for detecting absorption of the measuring beam. The radiation source unit includes at least one light-emitting diode. According to the present disclosure, the detection unit includes a polychromator arrangement, in particular a high-resolution polychromator arrangement, as a spectrometric arrangement.

A spectrometer and a spectral detection and analysis method implemented by the spectrometer. The spectrometer includes an optical device and a detection device. The optical device includes at least one light filter, each of which including at least two light filtering units, so that the optical device can emit at least two kinds of monochromatic light. The detection device includes at least one detector, each of which comprising at least two detection units facing at least two light filtering units in the corresponding light filter in a one-to-one relationship. The monochromatic light emitted from the light filtering unit is emitted along the direction perpendicular to the direction of the light emitting surface.

A spectrometer and a spectral detection and analysis method implemented by the spectrometer. The spectrometer includes an optical device and a detection device. The optical device includes at least one light filter, each of which including at least two light filtering units, so that the optical device can emit at least two kinds of monochromatic light. The detection device includes at least one detector, each of which comprising at least two detection units facing at least two light filtering units in the corresponding light filter in a one-to-one relationship. The monochromatic light emitted from the light filtering unit is emitted along the direction perpendicular to the direction of the light emitting surface.

The disclosure relates to the technique, including systems and methods, for use in optical topographical and/or tomographic 3D imaging of a sample. The system may include (a) a lens unit, chromatically dispersive so that its focal length varies depending on a light wavelength, the lens unit being configured to pass therethrough polychromatic light arriving from and originated at a sample, while selectively collimating those spectral components of the polychromatic light which are in focus based on their wavelengths and origins; and (b) an etalon structure accommodated in an optical path of light being output from the lens unit to receive the collimated light, said etalon structure being configured to operate with multiple resonant wavelengths and to provide respective spectral transmittance peaks at said resonant wavelengths.

A multi-spectral imaging (MSI) device can include an imaging plane and a diffractive optic. The imaging plane can include at least two groups of pixels an array of pixels for sensing at least two spectral bands. The at least two spectral bands can include a first spectral band and a second spectral band. The diffractive optic can be configured for diffracting an electromagnetic wave into the at least two spectral bands and focusing each spectral band component of the electromagnetic wave onto the group of pixels for the spectral band to generate an image.