Abstract:
The present invention discloses a co-aperture multi-field of view (FOV) image-spectrum cooperative detection system, and the system includes an infrared optical window, a large FOV two-dimensional scanning mirror, a co-aperture multi-FOV main optical system, a large FOV scanning detector, a staring infrared detector, an infrared non-imaging broadband spectrum measuring unit, a data processing unit, a control unit, and a servo system. Correspondingly, the present invention further provides a method based on the system. The present invention searches a target area by using large FOV scanning, and identifies a target by using medium FOV staring infrared detection, and small FOV fine detection is finally performed on the area to identify the target in combination with spectrum data analysis. The detection sensitivity is higher, and capturing and tracking of a moving target are more precise and stable, thereby solving the technical problems that a conventional remote sensing detection cannot perform research on movement changes of a moving target and a dynamic phenomenon and searching and tracking of a small-scale object is unsuccessful; therefore, the present invention has higher implementability and practical promotion values.
Abstract:
Methods and systems for detecting early stage dental caries and decays are provided. In particular, in an embodiment, laser-induced autofluorescence (AF) from multiple excitation wavelengths is obtained and analyzed. Endogenous fluorophores residing in the enamel naturally fluoresce when illuminated by wavelengths ranging from ultraviolet into the visible spectrum. The relative intensities of the AF emission changes between different excitation wavelengths when the enamel changes from healthy to demineralized. By taking a ratio of AF emission spectra integrals between different excitation wavelengths, a standard is created wherein changes in AF ratios within a tooth are quantified and serve as indicators of early stage enamel demineralization. The techniques described herein may be used in conjunction with a scanning fiber endoscope (SFE) to provide a reliable, safe and low-cost means for identifying dental caries or decays.
Abstract:
A transmission Raman spectroscopy apparatus has a light source for generating a light profile on a sample, a photodetector having at least one photodetector element, collection optics arranged to collect Raman scattered light transmitted through the sample and direct the Raman light onto the at least one photodetector element and a support for supporting the sample. The support and light source are arranged such that the light profile can be moved relative to the sample in order that the at least one photodetector element receives Raman scattered light generated for different locations of the light profile on the sample.
Abstract:
A lens scanning mode hyperspectral imaging system and a rotor unmanned aerial vehicle include: an imaging lens, an imaging spectrometer and a surface array detector arranged in sequence and coaxial to a main optic axis, wherein the imaging spectrometer and the surface array detector are connected and mounted to each other; wherein the lens scanning mode hyperspectral imaging system further includes: a driving device for driving the imaging lens to translate relative to a plane where a slit of the imaging spectrometer is. The hyperspectral imaging system of the present invention overcomes the technical bias in the prior art that the imaging lens must be fixed, and the present invention provides relative motion between the target object and the imaging spectrometer by the lens scanning mode for imaging, which solves the image distortion problem of conventional hyperspectral imaging system using a slit scanning mode or a scanning mode.
Abstract:
A printer incorporating a spectrometry device includes a spectroscope that includes a light receiving optical system including a light receiver which receives reflected light from a range of measurement in a medium, a distance sensor that detects the distance between the medium and the spectroscope, and a reflecting mirror driver and an optical path adjuster that adjust the optical path of the reflected light which is incident on the light receiving optical system from the range of measurement according to the distance detected by the distance sensor.
Abstract:
The present invention discloses a co-aperture multi-field of view (FOV) image-spectrum cooperative detection system, and the system includes an infrared optical window, a large FOV two-dimensional scanning mirror, a co-aperture multi-FOV main optical system, a large FOV scanning detector, a staring infrared detector, an infrared non-imaging broadband spectrum measuring unit, a data processing unit, a control unit, and a servo system. Correspondingly, the present invention further provides a method based on the system. The present invention searches a target area by using large FOV scanning, and identifies a target by using medium FOV staring infrared detection, and small FOV fine detection is finally performed on the area to identify the target in combination with spectrum data analysis. The detection sensitivity is higher, and capturing and tracking of a moving target are more precise and stable, thereby solving the technical problems that a conventional remote sensing detection cannot perform research on movement changes of a moving target and a dynamic phenomenon and searching and tracking of a small-scale object is unsuccessful; therefore, the present invention has higher implementability and practical promotion values.
Abstract:
Aspects of a monochromator are described herein. In one embodiment, the monochromator includes a light source that provides light, a diffraction grating including a first diffraction grating and a second diffraction grating, a grating drive motor that rotates the diffraction grating to provide dispersed wavelengths of light, a detector that detects a portion of the dispersed wavelengths of light, and processing circuitry that controls a grating drive motor to regulate an angular velocity of the grating based on an angular orientation of the diffraction grating. By using a diffraction grating having multiple, different dispersive surfaces, measurements of relatively high precision and quality may be taken throughout a wider spectral range. In another aspect, the processing circuitry controls a sample drive motor to vary an angle of incidence of the dispersed wavelengths of light onto a sample for evaluation.
Abstract:
A printer includes a spectroscope that has a variable wavelength interference filter which incidents light from a measurement region, and a light receiving section which receives light from the variable wavelength interference filter and which outputs a detection signal according to an amount of received light, a carriage moving unit which relatively moves the spectroscope along one direction with respect to a measurement target of spectrometry and moves the measurement region with respect to the measurement target, and a timing detection circuit which has a differential circuit that differentiates the detection signal and outputs a differentiation signal, wherein in a case where the measurement target is a color patch, spectrometry in which the amount of received light is detected starts based on the differential signal.
Abstract:
Stand-off spectrometry systems and methods are described herein. One system includes a laser source configured to emit a single-spectral light, and an optical frequency comb (OFC) coupled to the laser source and configured to generate, using the single-spectral light, a multi-spectral light to determine an absorption spectrum of a substance.
Abstract:
Aspects of a monochromator are described herein. In one embodiment, the monochromator includes a light source that provides light, a diffraction grating including a first diffraction grating and a second diffraction grating, a grating drive motor that rotates the diffraction grating to provide dispersed wavelengths of light, a detector that detects a portion of the dispersed wavelengths of light, and processing circuitry that controls a grating drive motor to regulate an angular velocity of the grating based on an angular orientation of the diffraction grating. By using a diffraction grating having multiple, different dispersive surfaces, measurements of relatively high precision and quality may be taken throughout a wider spectral range. In another aspect, the processing circuitry controls a sample drive motor to vary an angle of incidence of the dispersed wavelengths of light onto a sample for evaluation.