An approach to noninvasively and remotely detect the presence, location, and/or quantity of a target substance in a scene via a spectral imaging system comprising a spectral filter array and image capture array. For a chosen target substance, a spectral filter array is provided that is sensitive to selected wavelengths characterizing the electromagnetic spectrum of the target substance. Elements of the image capture array are optically aligned with elements of the spectral filter array to simultaneously capture spectrally filtered images. These filtered images identify the spectrum of the target substance. Program instructions analyze the acquired images to compute information about the target substance throughout the scene. A color-coded output image may be displayed on a smartphone or computing device to indicate spatial and quantitative information about the detected target substance. The system desirably includes a library of interchangeable spectral filter arrays, each sensitive to one or more target substances.

An optoelectronic measuring device may be used for the frequency-resolved measurement of an intensity of electromagnetic radiation. The device may include a plurality of measurement channels. A first of the measurement channels may have a first spectral sensitivity, and a further of the measurement channels may have a further spectral sensitivity different from the first spectral sensitivity. The device may further include a plurality of collimators for collimating the electromagnetic radiation. A separate optical path may extend through each of the collimators to one or more of the measurement channels. Each of the measurement channels may be arranged to measure an intensity of the electromagnetic radiation collimated by means of one or more of the collimators. The optoelectronic measuring device may have more collimators as compared to measurement channels.

Provided are an imaging apparatus capable of acquiring an image having a small transmission wavelength shift at a plurality of wavelengths and an image processing apparatus capable of measuring a subject on the basis of an image which has a small transmission wavelength shift and which is acquired at a plurality of wavelengths. High image height rays imaged at a position of which an image height is high is incident at a large angle with respect to the optical axis. Therefore, the transmission wavelength shift increases. However, in the imaging apparatus according to the first aspect, the first optical system causes the high image height rays to be incident into the first optical filter and the second optical filter in a state where the upper ray and the lower ray are parallel. Accordingly, in the first and second optical filters, the transmission wavelength shift due to an difference in incident angle of the high image height rays is suppressed, and an image with a small transmission wavelength shift can be acquired simultaneously at a plurality of wavelengths.

A sensor system provides a plurality of sets of optical sensors configured in a layer and a plurality of sets of optical filters configured in a layer, where the bottom surface of the plurality of sets of optical filters is located proximal to the top surface of the plurality of sets of optical sensors and where a set of optical filters of the plurality of sets of optical filters includes a plurality of optical filters that are arranged in a pattern so that at least some optical filters of the plurality of optical filters are configured to pass light in a different wavelength range. The sensor system provides one or more rejection filters configured as a layer and a first set of optical elements, where the one or more rejection filters and the first set of optical elements are configured in a stack that is located above the top layer of the plurality of sets of optical filters. The sensor system includes one or more processing modules configured to receive an output from each optical sensor of the plurality of sets of optical sensors and generate a spectral response based on the output.

Disclosures of the present invention describe a device for measuring retina safety improvement index, comprising: a light receiving unit, a first data processing unit and a second data processing unit. The light receiving unit receives a first visible light and a second visible light that is obtained by letting the first visible light pass through a blue light blocking product. The first data processing unit calculates a first maximum permissible exposure (MPE) of the first visible light and a second MPE of the second visible light. The second data processing unit calculates a retina safety improvement (RSI) index based on the first MPE and the second MPE. As such, by using this device, a consumer is facilitated to know how much eyes-protecting ability does a specific blue light blocking product have, without needing to read any numeric value of blue light filtering percentage and/or unfamiliar spectrogram.

An image capturing apparatus comprises an image sensor that receives beams of reflected light from a subject incident via an imaging optical system whose wavelength that reaches a light-receiving surface is different in accordance with an angle of incidence of reflected light, and generates an image signal. The apparatus changes a state of the imaging optical system or the image sensor such that a second image signal is generated by beams for which the angle of incidence of the reflected light from the imaging optical system is different from the beams by which a first image signal is generated. The apparatus outputs a spectral image based on a plurality of the image signals generated by receiving the beams in different state of the imaging optical system or the image sensor.

An optical sensor device may comprise an optical sensor comprising a set of sensor elements; an optical filter comprising one or more channels, wherein each channel, of the one or more channels, is configured to pass light associated with particular wavelengths to a subset of sensor elements, of the set of sensor elements, of the optical sensor; a phase mask configured to distribute a plurality of light beams associated with a subject in an encoded pattern on an input surface of the optical filter; and one or more processors. The one or more processors may be configured to obtain, from the optical sensor, sensor data associated with the subject and determine, based on the sensor data, spectral information associated with the subject. The one or more processors may determine, based on the sensor data and information associated with the encoded pattern, spatial information associated with the subject.

A device (1) for determining the concentration of a gas component is configured with a radiation source (30) for radiating (31) light as a light emission in an infrared wavelength range. Two detector arrays (52, 62) with two detector elements (50, 60) are configured suitably for detecting the light emission generated by the radiation source (30) in two detector arrays (52, 62). Two filter elements (51, 61) are associated with the detector elements (50, 60). The two detector elements (50, 60) are oriented in relation to the radiation source, so that a range of overlap (65) is obtained due to the two detector arrays (52, 62). The range of overlap (65) causes attenuations in the propagation of light, which may be due to gas molecules or moisture (400). The attenuations in the propagation of light affect both detector elements (50, 60) and are compensated concerning the determination of the concentration.

A spectrometer comprises a plurality of isolated optical channels comprising a plurality of isolated optical paths. The isolated optical paths decrease cross-talk among the optical paths and allow the spectrometer to have a decreased length with increased resolution. In many embodiments, the isolated optical paths comprise isolated parallel optical paths that allow the length of the device to be decreased substantially. In many embodiments, each isolated optical path extends from a filter of a filter array, through a lens of a lens array, through a channel of a support array, to a region of a sensor array. Each region of the sensor array comprises a plurality of sensor elements in which a location of the sensor element corresponds to the wavelength of light received based on an angle of light received at the location, the focal length of the lens and the central wavelength of the filter.

In one embodiment, an infrared (IR) imaging system for determining a concentration of a target species in an object is disclosed. The imaging system can include an optical system including an optical focal plane array (FPA) unit. The optical system can have components defining at least two optical channels thereof, said at least two optical channels being spatially and spectrally different from one another. Each of the at least two optical channels can be positioned to transfer IR radiation incident on the optical system towards the optical FPA. The system can include a processing unit containing a processor that can be configured to acquire multispectral optical data representing said target species from the IR radiation received at the optical FPA. Said optical system and said processing unit can be contained together in a data acquisition and processing module configured to be worn or carried by a person.