Abstract:
The plane field polychromator comprising a fixed middle entrance slot (A), a central fixed concave holographic network with a sagittal curvature (O2), a plane field sensor (D) is characterized in that the middle (A) of the entrance slot, the centre of the sagittal curvature (02) and the middle of the plane sensor (D) are arranged respectively in order to eliminate the astigmatism on a same straight line (S) located on the perpendicular plane to the direction of the network lines (G) and passing through the centre of the sagittal curvature (O2).
Abstract:
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.
Abstract:
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.
Abstract:
A spectra generator having an electrically programmable diffraction grating. There may be a broad band light source that emits light which is diffracted by the grating. Diffracting elements in the grating may be individually adjustable so that generation of a specific spectrum or spectra may be achieved. The diffracting elements may be adjusted according to electrical signals of a program from a computer. The generated synthetic spectra may be used for testing and calibration of spectrometers or other devices. Synthetic spectra may also be used for scene generation and other purposes.
Abstract:
Le polychromateur à champ plan comprenant une fente d'entrée fixe de milieu (A), un réseau holographique concave fixe (G) de centre de courbure sagittale (O2), un détecteur à champ plan (D) est caractérisé en ce que le milieu (A) de la fente d'entrée, le centre de courbure sagittale (O2) et le milieu du détecteur plan (D) sont respectivement disposés pour supprimer l'astigmatisme sur une même droite (S) située dans le plan perpendiculaire à la direction des traits du réseau (G) et passant par le centre de courbure sagitalle (O2).
Abstract:
본발명은, 특정파장의광을반사하거나투과시키는광섬유브래그격자를광 커플러및 광검출기사이에순차적으로배치하여, 특정파장의광을순차적으로검출하여분석하는광섬유브래그격자를이용한분광기에관한것으로, 충분한분해능을확보하면서도광의도파경로겹침과무관하게구성하고, 도파거리를최소화할수 있어서, 크기를최소화한분광기를제작할수 있고, 광원또는간섭으로인한잡음을효과적으로제거할수 있어서, 분해능및 정밀도를향상시킬수 있다.
Abstract:
PURPOSE: An integrated polychromater formed by integrating transmission blocks is provided to obtain stability of the alignment of components due to the integrated alignment formed by the blocks and to prevent the alignment of the components from being in disorder according to a working condition. CONSTITUTION: An integrated polychromater(300) formed by integrating transmission blocks(310a,310b,310c,310d) comprises reflective interference filters(120a,120b,120c) and optical detectors(130a,130b,130c,130d). The blocks are formed into a polyhedron. The reflective interference filters of different transmission and reflection wavelength bands are arranged in one surfaces of each block. The reflective interference filters are successively arranged along a path of incident lights in a row. Planes of each reflective interference filter are not perpendicular to an axial line of a progressing path of the incident lights. The optical detectors are arranged on a path of the incident lights of a specific wavelength reflected by the reflective interference filters, thereby detecting the lights of the specific wavelength.