138results about "Spectrum generation using multiple reflection" patented technology

The invention discloses a reconstruction spectral imaging system based on an electromagnetic drive Fabry-Perot resonant cavity, and belongs to the field of spectral imaging. The system comprises an optical lens group, an electromagnetic driving device, a Fabry-Perot resonant cavity, a photoelectric detection array and a calculation unit, the cavity length of the Fabry-Perot resonant cavity can be adjusted through the electromagnetic driving device. The optical lens group receives light reflected or emitted by an external to-be-measured target scene and carries out collimation processing, and then the light enters the Fabry-Perot resonant cavity. The Fabry-Perot resonant cavity screens the incident light based on the resonance condition of the cavity length of the Fabry-Perot resonant cavity, and the screened light is emitted to the photoelectric detection array; the photoelectric detection array converts the incident light intensity into an electric signal and outputs the electric signal to the calculation unit; and a spectrum reconstruction model is built in the calculation unit, and a hyperspectral image of the to-be-measured target scene is obtained by using the spectrum reconstruction model based on the electric signal. The working range and the spectral imaging precision of the spectral imaging system based on the Fabry-Perot resonator are improved, the technological requirements are reduced, and the engineering applicability of the spectral imaging system based on the Fabry-Perot resonator is improved.

A composite optical filter may include a substrate, a communal optical filter, one or more first optical filters, and one or more second optical filters. The communal optical filter may be formed on a first surface of the substrate. The one or more first optical filters may be formed on one or more first portions of a second surface of the substrate and may be configured to pass light associated with a first wavelength. The one or more second optical filters may be formed on one or more second portions of the second surface of the substrate and may be configured to pass light associated with a second wavelength.

To provide a spectroscopic unit and spectroscopic module that can perform measurements with high precision. [Solution] The spectroscopic unit 110 includes a Fabry-Perot interference filter 10 having a pair of mirrors whose distance from each other is variable, an optical system 50 having a first lens 51 that focuses light from an object M onto the Fabry-Perot interference filter 10, and a photodetector 8 that detects light transmitted through the Fabry-Perot interference filter 10. When the distance D1 from the first lens 51 to the object M is 5 cm, and a circular area on the surface of the object M with a diameter D2 of 1 cm is defined as the field of view region A, the optical system 50 is configured to allow light with a divergence angle of 1 degree or less to enter the light transmission region of the Fabry-Perot interference filter 10, while preventing light with a divergence angle greater than 1 degree from entering the light transmission region of the Fabry-Perot interference filter 10 from entering the light transmission region.

A medication assurance system for verification of both the medication and the patient is disclosed. A portable spectrometer is used to obtain a light spectrum of the medication. A subject identification or biometric device is used to identify the patient. A controller coupled to the portable spectrometer and the subject identification device identifies the medication by performing a chemometric analysis of the light spectrum. Based on the medication identified and the patient identified, the controller can determine if the medication is to be taken by the patient.

The invention discloses a spectrum super-resolution method and system based on an FP cavity and deep learning, and the method comprises the steps: S1, carrying out the initialization of spectrum collection, and selecting light with a specific wavelength after the light is acted with a target detection object; s2, performing photoelectric conversion and digitization to generate low-resolution original discrete spectrum data of corresponding wavelengths; s3, continuous spectrum scanning is carried out, and original discrete spectrum data collection of the whole target wave band is completed; and S4, performing super-resolution spectrum reconstruction, and judging whether cyclic reconstruction is performed or not based on a reconstruction data quality evaluation result until the quality is qualified. According to the method, an accurate mapping model from a low-resolution spectrum to a high-resolution spectrum is established through a pre-trained deep neural network, and an original spectrum which is collected by an FP cavity and is limited by the theoretical limit optical resolution of the FP cavity can be reconstructed into a super-resolution spectrum of which the resolution remarkably exceeds the theoretical limit. The problem that the resolution of an FP cavity in a long-wave region is sharply reduced is effectively solved, and the full-wave-band uniform high resolution is realized.

Liquid membrane cell assemblies are disclosed. In some embodiments, the liquid membrane cell assembly includes an elongate base having opposed first and second end portions and a central portion disposed therebetween. The first and second end portions each includes an elongate body, an electrolyte channel within the body, an electrolyte port fluidly connected to the electrolyte channel, a fuel channel within the body, and a fuel port fluidly connected to the fuel channel. The central portion includes spaced and opposed first and second members that connect the bases of the first and second portions and that horizontally define an open area therebetween. The liquid membrane cell assembly additionally includes an anode adjacent the first and second members, and a cathode adjacent the first and second members such that the base is disposed between the anode and the cathode. The anode and cathode vertically define the open area therebetween.

To provide a favorable filter array with reduced stray focused light.SOLUTION: An apparatus is disclosed comprising an optical filter array (10) including an array of optical filter elements; where each optical filter element has opposing mutually parallel principal faces connected by sidewalls including at least one pair of opposing trapezoidal sidewalls and at least one pair of opposing sidewalls that are not mutually parallel; and where the opposing mutually parallel principal faces of the filter elements collectively define optical entrance and exit apertures of the optical filter array and include interference filters. Further disclosed is a method of illuminating such a filter array.SELECTED DRAWING: Figure 1

The invention discloses a broadband FP (Fabry-Perot) cavity transmission spectral line calibration method and a calibration spectral line generation device, and belongs to the field of astronomical spectrum calibration. According to the invention, the laser frequency comb is utilized to carry out precise calibration on the FP cavity, the precision is an Hz magnitude, and the calibration precision of the radial velocity of the FP cavity can reach m / s; by tuning laser frequency comb parameters, all transmission peaks are supplemented, and broadband coverage is achieved; the high precision requirement for FP cavity coating is avoided, the accuracy of transmission spectral lines is ensured, frequent calibration is performed on the FP cavity, and the problem that the FP cavity cannot provide long-term stability of frequency is solved; a low-repetition-frequency picosecond white light source is used, the spectrum is wide and flat, the spectrum is not sensitive to the position of a transmission peak of an FP cavity, and the light enters a calibrated FP cavity array to generate a calibration spectral line with a high signal-to-noise ratio and multiple frequency intervals, so that the calibration precision of the astronomical spectrometer reaches the cm / s-level radial velocity calibration precision. The method is applied to the calibration of the astronomical spectrometer for extrasolar planet search.

An Offner spectrometer for use in a multi-slit hyperspectral imaging system for imaging a remote object includes a first surface that is a transmissive surface having a narrow slit receiving light from a multi-spectral light source, a second curved transmissive surface receiving light from the first surface, a third curved reflective surface receiving light from the second surface, a fourth reflective surface that is a curved surface with a grating receiving light from the third surface and diffracting and reflecting light, a fifth surface that is curved reflective surface receiving light from the fourth surface, a sixth curved transmissive surface receiving light from the fifth surface, and a seventh surface that is a focal plane of the Offner spectrometer receiving light from the sixth surface. Each curved surface has X and Y prescriptions that are decoupled.

A filter array includes filters disposed in a two-dimensional plane and having different transmission spectra. The filters include a first filter with a transmission spectrum having a first peak group including first and second peaks adjacent to each other, and at least one second filter with a transmission spectrum having a second peak group including third and fourth peaks adjacent to each other. Of peaks included in the second peak group, the third peak has a wavelength closest to a wavelength at the first peak. A first interval between the wavelength at the first peak and a wavelength at the second peak is different from a second interval between the wavelength at the third peak and a wavelength at the fourth peak. ΔFSR / σ≥0.25, where ΔFSR denotes an absolute value of a difference between the first and second intervals and σ denotes a half-width of the first peak.

A device used in a system for generating spectral images corresponding to four or more wavelength bands includes optical filters different in spectral transmittance and an image sensor that detects light through the optical filters, in which when the wavelength bands are given numbers in an ascending or descending order of a central wavelength, the image sensor outputs i-th mask data by detecting only light corresponding to an i-th wavelength band and outputs j-th mask data by detecting only light corresponding to a j-th wavelength band among the wavelength bands, a correlation coefficient between the i-th and j-th mask data is greater than or equal to 0.8 in a combination where |i−j| is 1, and is equal to or less than 0.8 in at least one combination where |i−j| is greater than or equal to 2 and less than or equal to N−1.

An optical filter according to one aspect of the present disclosure comprises a filter array including a plurality of filters two-dimensionally arrayed and a band-pass filter. The plurality of filters includes a first filter and a second filter. A transmission spectrum of each of the first filter and the second filter has local maximum values of transmittance at three or more wavelengths included in a first wavelength region. The band-pass filter passes light in a second wavelength region including two or more wavelengths of the three or more wavelengths and not including one or more wavelengths of the three or more wavelengths. The filter array and the band-pass filter are disposed so that (a) the band-pass filter is located on an optical path of transmitted light that passes through the first filter and the second filter or (b) the first filter and the second filter are located on an optical path of transmitted light that passes through the band-pass filter.

Optical Flux Attenuation Device The present invention relates to an attenuation device (14) of a polychromatic optical flux around a wavelength of interest, the wavelength of interest being included in the wavelengths of the polychromatic optical flux, the polychromatic optical flux being collimated, the attenuation device (14) comprising: a Fabry-Pérot filter (20) formed of two semi-reflective plates spaced apart from each other, a control unit (22) of the Fabry-Pérot filter (20), the control unit (22) being adapted to: modify the spacing between the two semi-reflective plates so that the central wavelength of the Fabry-Pérot filter (20) is the wavelength of interest, and modify the inclination between the two semi-reflective plates to adjust the amount of polychromatic optical flux transmitted around the wavelength of interest. Figure for the abridged version: 1

The present disclosure concerns a method for characterizing a photovoltaic module, by means of a device for characterizing a photovoltaic module, the characterizing device comprising a light source so as to illuminate an object, a spectrometer comprising an optical acquisition axis and a polarizing filter comprising a polarization axis and arranged in front of the spectrometer, the light reflected by the object passing through the polarizing filter to be subsequently captured by the spectrometer, and a processing unit.

A filter array has a plurality of filters arranged two-dimensionally and each having a different transmission spectrum. The plurality of filters includes a first filter having a transmission spectrum with a first peak group including a first peak and a second peak adjacent to each other, and at least one second filter having a transmission spectrum with a second peak group including a third peak and a fourth peak adjacent to each other, among the plurality of peaks included in the second peak group, the wavelength of the third peak is closest to the wavelength of the first peak. A first interval between the wavelength of the first peak and the wavelength of the second peak is different from a second interval between the wavelength of the third peak and the wavelength of the fourth peak. When an absolute value of a difference between the first interval and the second interval is ΔFSR, and a half-value width of the first peak is σ, ΔFSR / σ ≥ 0.25.

A system and method for performing calibration of a measurement module provided to measure spectral characteristics (e.g., spectrum) of a laser beam of a radiation source, where the system includes a reference radiation source, and the method includes calibrating the measurement module using the reference radiation source.

A multiple-wavelength reflective Raman probe includes a first parabolic mirror, a second parabolic mirror, a third parabolic mirror, and a fourth parabolic mirror. The first parabolic mirror receives a laser light, and reflects as a collimated light beam. The second parabolic mirror receives the collimated light beam, and condenses to a convergent light beam. The third parabolic mirror has a through hole. The convergent light beam passes through the through hole, and is focused on the sample detecting position. The third parabolic mirror also collects the light reflected by the sample detecting position and reflects as a collimated detection light beam. The fourth parabolic mirror collects the detection light beam, and condenses to a detection output light beam. The detection output light beam is focused at a focal point of the fourth parabolic mirror to be collected by a spectrometer.

An optical filter includes a first reflector including a plurality of first sub-wavelength structures that are two-dimensionally arranged and spaced apart by a first period based on a first rule, and a second reflector provided separate from the first reflector, the second reflector including a plurality of second sub-wavelength structures that are two-dimensionally arranged and spaced apart by a second period based on a second rule.

A light detection device 1A includes a Fabry-Perot interference filter 10, a light detector 3, a spacer 4 that has a placement surface on which a portion outside a light transmission region 11 in a bottom surface of the interference filter 10 is placed, and an adhesive member 5 that adheres the interference filter 10 and the spacer 4 to each other. Elastic modulus of the adhesive member 5 is smaller than elastic modulus of the spacer 4. At least a part of a lateral surface of the interference filter 10 is located on the placement surface such that a part of the placement surface of the spacer 4 is disposed outside the lateral surface. The adhesive member 5 is disposed in a corner portion formed by the lateral surface of the interference filter 10 and the part of the placement surface of the spacer 4 and contacts each of the lateral surface and the part of the placement surface.

A system includes a top mirror, a bottom mirror, a top spacer mesa, a bottom spacer mesa, and an adhesive. The top mirror is added to a top substrate. The bottom mirror is added to a bottom substrate. The top spacer mesa is added to the top substrate. The bottom spacer mesa is added to the bottom substrate. The adhesive is affixed between a) the top substrate or a top support element and b) the bottom substrate or a bottom support element or a piezo actuator.

A line field optical coherence tomography (OCT) system and an absorption spectrometer system employing a tunable or swept laser architecture. The laser is a cat's-eye configuration with a preferably transmissive tilt tuned interference thin film filter.

This calibration method comprises: a step for preparing an optical element having a transmittance or reflectance peak at each of a plurality of wavelengths including those from a first wavelength to an n-th wavelength, a light source, a Fabry-Perot interference filter, and a detector; a first detection step for controlling a voltage applied to the Fabry-Perot interference filter so as to cause light rays of the first to n-th wavelengths to successively pass through the Fabry-Perot interference filter, and detecting a photocurrent by using the detector; and a first calibration step for calibrating a relational expression between the applied voltage and the transmission wavelength on the basis of a plurality of voltage values at a plurality of peaks of the photocurrent. At each of the first to n-th wavelengths, the full width at half maximum of the peak of the optical element is less than the full width at half maximum of the transmittance peak of the Fabry-Perot interference filter.

To provide an information processing device, an information processing system and an information processing method with which it is possible to easily detect the features of a substance even when the optical characteristics of the substance are unknown.SOLUTION: An information processing device comprises: an image acquisition unit for acquiring a spectral image for a plurality of spectral wavelengths as a captured image for a subject to be imaged; a spectrum calculation unit for calculating the spectroscopic spectrum of each pixel on the basis of the plurality of spectral images; a feature wavelength detection unit for detecting the feature wavelength of the spectroscopic spectrum of each pixel; a color setting unit for calculating a feature angle that corresponds to the feature wavelength of each pixel and setting the color of a hue circle that corresponds to the feature angle as the feature color of the pixel; and an image generation unit for generating a feature detection image in which each pixel of the captured image is converted to a feature color that corresponds to the pixel.SELECTED DRAWING: Figure 1

Systems and methods are provided for measuring the mechanical properties of ocular tissue, such as the lens or corneal tissue, for diagnosis as well as treatment monitoring purposes. A laser locking feedback system is provided to achieve frequency accuracy and sensitivity that facilitates operations and diagnosis with great sensitivity and accuracy. Differential comparisons between eye tissue regions of a patient, either on the same eye or a fellow eye, can further facilitate early diagnosis and monitoring.

To provide a spectral filter, an image sensor including the same, and an electronic device.SOLUTION: The present invention relates to a spectral filter and an image sensor including the same. The spectral filter comprises: a first resonance layer including a cavity; a first Bragg reflective layer and a second Bragg reflective layer that are arranged apart from each other by sandwiching the first resonance layer; a second resonance layer including at least a part of the first Bragg reflective layer and the second Bragg reflective layer, and the cavity; and a third Bragg reflective layer and a fourth Bragg reflective layer that are arranged apart from each other by sandwiching the second resonance layer.SELECTED DRAWING: Figure 2

Provided are a method and a device for characterizing a resonator element, a method and a device for providing an optical frequency reference, a LIDAR system and a gas sensing system. The method includes coupling a laser light into the resonator element, the resonator element having multiple carrier resonances for the carrier frequency of the laser light.

The optical system includes a first optical element comprising a first substrate, a partial reflection coating disposed on a first surface of the first substrate, and a first metamaterial layer disposed on or adjacent to the first surface of the first substrate and having a structure that defines a continuous phase gradient along a first direction parallel to the first surface of the first substrate; and a second optical element comprising a second substrate and a second metamaterial layer disposed on or adjacent to the first surface of the second substrate and having a structure that defines a continuous phase gradient along a second direction parallel to the first surface of the first substrate, wherein at least one surface of the second optical element is curved along the second direction.

Provided is a spectroscopic camera capable of capturing a spectroscopic image in which the influence of ghosting is suppressed. A spectroscopic camera (1) includes a plurality of flat plate elements including a standard; a first lens group disposed at a position closer to an object side than the standard; a second lens group disposed at a position closer to an image side than the standard; and a capturing element that receives light that has passed through the second lens group from the standard, wherein parallel light that has been collimated by the first lens group is incident on the plurality of flat plate elements, the second lens group constitutes an imaging optical system that causes light that has passed through the plurality of flat plate elements to be imaged on the capturing element, and the Fresnel reflection interface, on which no antireflection film is disposed, is two-sided or less in the plurality of flat plate elements on which the parallel light is incident.

A light detecting device according to one aspect of the present disclosure comprises: a filter array including a plurality of filters that is two-dimensionally arrayed, wherein each of first and second filters included in the plurality of filters includes a first reflective layer, a second reflective layer, and an intermediate layer therebetween and has a resonance structure having resonant modes whose orders are different from each other, a refractive index and / or a thickness of the intermediate layer in the first and second filters is different depending on the filter, a transmission spectrum of each of the first and second filters has local maximum values of transmittance at a plurality of wavelengths included in a certain wavelength region, and the wavelengths correspond to the resonant modes, respectively; and an image sensor including a plurality of light detection elements, wherein each light detection elements is disposed at a position where the light detection element receives light that passes one of the plurality of filters and has sensitivity to light in the wavelength region.