A spectrometry system for spectroscopically analyzing a sample is provided. The system includes an excitation source for interacting with the sample; a detector for detecting at least a portion of light absorbed or emitted by the sample, the excitation source and detector being optically coupled via an optical pathway; and an aperture positioned in the optical pathway for limiting transmission of light from the excitation source to the detector; wherein the aperture is configured to have a spatially varying distribution of one or more geometric features that provide regions of variable transmission around an edge of the aperture. Also provided is a mask for use with a spectrometry system, the mask configured to be positioned in an optical pathway between an excitation source and a detector, wherein the mask has a spatially varying distribution of one or more geometric features that provide regions of variable transmission around an edge of the aperture. A method for limiting light throughput from an excitation source to a detector via an aperture in a spectrometry system is also provided.

Apparatus and methods are presented for spectral domain optical imaging, in particular for single shot 3-D spectral domain imaging of the retina of the human eye. In certain embodiments one or more 3-D images across elongated areas of an object are acquired, with scanning perpendicular to the long axis of the elongated areas for imaging extended volumes of the object. In preferred embodiments the captured light is sampled in the Fourier plane, in a dimension substantially perpendicular to the long axis, with a cylindrical lenslet array, while in other embodiments the captured light is sampled in the image plane. Apparatus and methods are also presented for hyperspectral imaging of the retina, with the illuminating beams preferably angled to suppress interference from corneal reflections. Apparatus and methods are also presented for multi-wavelength wavefront sensing, with simultaneous capture of light in two or more paths with different delays.

A handheld spectrometer can be configured with a visible aiming beam to allow the user to determine the measured region of the object. When the visible aiming beam comprises the spectrometer measurement beam, the spectrometer measurement beam comprises sufficient energy for the user to see the measurement beam illuminating the object. When the visible aiming beam comprises a separate beam, the visible aiming beam comprises sufficient energy for the user to see a portion of the aiming beam reflected from the object. The visible aiming beam and measurement beam can be arranged to at least partially overlap on the sample, such that the user has an indication of the area of the sample being measured.

A high-sensitive contactless chromaticity measuring device according to the present invention, includes: a lens unit to receive light emitted from a measurement object; a light distribution unit including an optical fiber to receive the light passing through the lens unit and distribute the received light through n paths to output the light to the other side, wherein a numerical aperture is greater than a predetermined reference value, a condensing lens to reduce an incidence angle of the light output to the other side of the optical fiber to a target angle or more, and n color filters to transmit different wavelengths of the light passing through the condensing lens; and a signal conversion unit including a photodiode to convert the light transmitted from the light distribution unit into an electrical signal.

A method of assessment of renal function by monitoring a time-varying fluorescence signal emitted from a fluorescent agent from within a diffuse reflecting medium with time-varying optical properties is provided that includes using a renal monitoring system comprising at least one light source, at least one light detector, at least one optical filter, and at least one controller to provide a measurement data set comprising a plurality of measurement entries, each measurement data entry comprising at least two measurements obtained at one data acquisition time from a patient before and after administration of the fluorescent agent.

Systems and methods here may be used for automated capturing and analyzing spectrometer data of multiple sample gemstones on a stage, including mapping digital camera image data of samples, applying a Raman Probe to a first sample gemstone under evaluation on the stage, receiving spectrometer data of the sample gemstone from the probe, automatically moving the stage to a second sample, using the image data, and analyzing the other samples.

A camera for a vehicular vision system includes a circuit board having a first side and a second side opposite the first side. The circuit board has a first coefficient of thermal expansion (CTE). An imager is disposed at the first side of the circuit board, and a lens assembly is optically aligned with the imager. A bend-countering element is disposed at the first side or the second side of the circuit board. The bend-countering element has a second CTE that is different from the first CTE of the circuit board. The bend-countering element counters temperature-induced bending of the circuit board. With the camera disposed at the vehicle, temperature-induced bending of the bend-countering element is in an opposite direction from temperature-induced bending of the circuit board.

Methods, apparatuses, and systems for improving gas detecting devices are provided. An example gas detecting device may include a receiver element. In some examples, the receiver element may include a sample filter component and a reference filter component. In some examples, the sample filter component may be positioned coaxially with the reference filter component.

Provided is a measurement device including a spectroscope, a movement mechanism configured to relatively move the spectroscope in one direction, and one or more processors configured to determine whether a measurement position measured by the spectroscope is moved into a color patch, in which the one or more processors cause the spectroscope to execute measurement processing for a plurality of wavelengths set in advance while relatively moving the spectroscope in the one direction, and when at least one of amounts of variation of measured values with respect to each of the plurality of wavelengths obtained in the measurement processing exceeds a first threshold value and then each of the amounts of variation of the measured values of the plurality of wavelengths falls below a second threshold value which is less than or equal to the first threshold value, determine that the measurement position is moved into the color patch.

A self-calibrating spectrometer that captures a sample spectrum image of a sample via a light dispersion device and a calibration spectrum image of a calibration light source having a known spectrum (e.g., in the same image frame using a bifurcated fiber optic cable). Spectral data is extracted from the sample spectrum image and wavelength calibrated by matching calibration spectral data extracted from the calibration spectrum image to the known spectrum of the calibration light source, mapping each pixel position of the calibration spectrum image to a wavelength of the known spectrum of the calibration light source, and mapping each pixel position of the sample spectral data to a wavelength based on the pixel position-to-wavelength mapping. In some embodiments, extracted features from the wavelength calibrated spectral data are used by classification module, trained on a dataset of features extracted from spectral data of known samples, to classify the sample.