Abstract:
A hyperspectral imaging system (100b) and a method are disclosed herein for providing a hyperspectral image of an area of a remote object (e.g., scene of interest 104). In one aspect, the hyperspectral imaging system includes at least one optic (106), a rotatable disk (302) which has multiple straight slits (304) formed therein, a spectrometer (110), a two-dimensional image sensor (112), and a controller (114). In another aspect, the hyperspectral imaging system includes at least one optic, a rotatable disk (which has at least one spiral slit formed therein), a spectrometer, a two-dimensional image sensor, and a controller. In yet another aspect, the hyperspectral imaging system includes at least one optic, a rotatable drum (which has a plurality of slits formed on the outer surface thereof and a fold mirror located therein), a spectrometer, a two-dimensional image sensor, and a controller.
Abstract:
A spectrometer for detecting an electromagnetic (EM) wave spectrum having one or more wavelength components within a spectral band of interest, and a method of detecting an electromagnetic (EM) wave spectrum having one or more wavelength components within a spectral band of interest. The method uses an entrance aperture; a dispersion and imaging optics containing at least one dispersion element; an exit aperture; a collection optics; and at least one single-pixel detector, each single-pixel detector sensitive to one or more of the wavelength components; and the method comprises the steps of spatially encoding at least one entrance slit of the entrance aperture along a direction substantially transverse to a direction of dispersion of the dispersion and imaging optics; creating, using the dispersion and imaging optics, dispersed images of the entrance aperture on a plane of the exit aperture, such that respective images at the different wavelength components are offset by different amounts of displacements along the direction of dispersion; spatially encoding a plurality of exit slits of the exit aperture along the direction substantially transverse to the direction of dispersion, wherein the exit aperture comprises a plurality of exit slits arranged in the direction of dispersion; gathering, using the collection optics, a total EM wave energy that enters the entrance aperture and exits the exit aperture to one of the at least one single-pixel detectors; changing at least one of an encoding pattern of the at least one entrance slits and an encoding pattern of the plurality of exit slits for a number of times; and measuring the output of the at least one detector for respective ones of the number of times for reconstructing the EM wave spectrum.
Abstract:
An ICP emission spectrophotometer includes an inductively coupled plasma device, a spectroscope, and a computer. The spectroscope includes an incidence window, an incidence side slit, a diffraction grating, an emission window, an emission side slit, and a detector. Measurement conditions including diffraction condition and a measurement result are displayed on a display device. In a case where there are a plurality of diffraction conditions each including a combination of a diffraction grating and a diffraction order for measuring desired diffracted light, comparison information including at least an intensity and a resolution of emitted light in the diffraction condition is displayed on the display device. A measurer selects diffraction conditions in which resolution is higher from among the diffraction conditions, and selects a diffraction condition in which an intensity is obtained from among the selected diffraction conditions.
Abstract:
A spectral characteristic acquisition device includes a member configured to have a plurality of openings arrayed in a predetermined direction, each of the plurality of openings inclined with respect to the predetermined direction, the plurality of openings being configured to pass light beams from a plurality of positions on an object therethrough, a spectrally dispersing part configured to spectrally disperse the light beams having passed through the plurality of openings in a direction orthogonal to the predetermined direction, and a plurality of one-dimensional image capturing parts provided at a predetermined interval in a plurality of lines and configured to be irradiated with the light beams having been spectrally dispersed by the spectrally dispersing part, a plurality of pixels of the plurality of one-dimensional image capturing parts being arrayed in a direction parallel to the predetermined direction.
Abstract:
A hyperspectral imaging system and a method are described herein for providing a hyperspectral image of an area of a remote object (e.g., scene of interest). In one aspect, the hyperspectral imaging system includes at least one optic, a rotatable disk (which has at least one spiral slit formed therein), a spectrometer, a two-dimensional image sensor, and a controller. In another aspect, the hyperspectral imaging system includes at least one optic, a rotatable disk (which has multiple straight slits formed therein), a spectrometer, a two-dimensional image sensor, and a controller. In yet another aspect, the hyperspectral imaging system includes at least one optic, a rotatable drum (which has a plurality of slits formed on the outer surface thereof and a fold mirror located therein), a spectrometer, a two-dimensional image sensor, and a controller.
Abstract:
A hyperspectral imaging system and a method are described herein for providing a hyperspectral image of an area of a remote object (e.g., scene of interest). In one aspect, the hyperspectral imaging system includes at least one optic, a rotatable disk (which has at least one spiral slit formed therein), a spectrometer, a two-dimensional image sensor, and a controller. In another aspect, the hyperspectral imaging system includes at least one optic, a rotatable disk (which has multiple straight slits formed therein), a spectrometer, a two-dimensional image sensor, and a controller. In yet another aspect, the hyperspectral imaging system includes at least one optic, a rotatable drum (which has a plurality of slits formed on the outer surface thereof and a fold mirror located therein), a spectrometer, a two-dimensional image sensor, and a controller.
Abstract:
A control apparatus includes a slit plate including a plurality of rectangular slits with different widths. The control apparatus also includes an acquisition unit which acquires an incident spectrum from the rectangular slit. The apparatus also includes a slit selecting unit which acquires a half value wavelength of the incident spectrum on the basis of the incident spectrum, and performs a selection of one of the plurality of rectangular slits on the basis of the half value wavelength.
Abstract:
A three-channel spectrometer including: a beamsplitter element that receives an incident radiation and transmits a first portion, a second portion, and a third portion of the incident radiation, a first slit that receives the first portion and transmits a first slit output radiation of a first wavelength range; a second slit that receives the second portion and transmits a second slit output radiation of a second wavelength range; a third slit that receives the third portion of the incident radiation and transmits a third slit output radiation of a third wavelength range; a common optical form that receives and collimates the first, second, and third slit output radiation; and a dispersive element that receives and reflects the collimated first, second, and third slit output radiation from the optical form.
Abstract:
A polychromator in a Paschen-Runge mounting in which intensity measurements are made by means of a row of photodiodes. The spectral intensity distribution of at least two spectral regions on the Rowland circle is transmitted to the row of photodiodes by image conductors and is measured there.
Abstract:
An optical system for a multidetector array spectrophotometer which includes multiple light sources for emitting light of selected wavelength ranges and means for selectively transmitting the selected wavelength ranges of light to respective slits of a multi-slit spectrograph for multiple wavelength range detection. The spectrograph has two or more slits which direct the selected wavelength ranges of the light spectra to fall upon a dispersive and focusing system which collects light from each slit, disperses the light by wavelength and refocuses the light at the positions of a single set of detectors.