A spectral device is provided with: a filter having a property of transmitting light of multiple wavelength ranges from a measurement object; a driving means to slide the filter; and a detector to detect an intensity of the light from the measurement object, the light having passed through the filter, the detector to further measure the intensity of the light multiple times sequentially while the driving means slides the filter and thereby obtain multiple pieces of measured data to be used for a calculation of spectral information.

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 gas measurement system as disclosed can include a coherent light source, which emits a light beam; a detector; a beam path formed between the light source) and the detector; and a gas cell arranged in the beam path such that the detector receives light transmitted through the gas cell. The gas cell can include a porous ceramic and have an optical path length which is a multiple of the actual layer thickness of the gas cell. A optical element can be arranged in the beam path between the light source and the gas cell with the light beam emitted by the light being widened and unfocussed as the light beam enters the gas cell.

Systems for spectroscopy are provided. Exemplary systems include: an enclosure; a tunable laser disposed in the enclosure; an opening on a surface of the enclosure; a beam splitter disposed in the enclosure, the beam splitter being optically coupled to the tunable laser and the opening; a sensor, a sensing surface of the sensor having a filter disposed thereon; and electronics coupled to the tunable laser and the sensor, the electronics including a processor, memory, and a battery.

Systems and methods for determining one or more properties of a sample are disclosed. The systems and methods disclosed can be capable of measuring along multiple locations and can reimage and resolve multiple optical paths within the sample. The system can be configured with one-layer or two-layers of optics suitable for a compact system. The optics can be simplified to reduce the number and complexity of the coated optical surfaces, et al. on effects, manufacturing tolerance stack-up problems, and interference-based spectroscopic errors. The size, number, and placement of the optics can enable multiple simultaneous or non-simultaneous measurements at various locations across and within the sample. Moreover, the systems can be configured with an optical spacer window located between the sample and the optics, and methods to account for changes in optical paths due to inclusion of the optical spacer window are disclosed.

An illumination unit is described that includes a first light source positioned on a first axis and a second light source on a second axis that intersects and is angularly offset with respect to the first axis. The illumination unit includes a reflector having an aperture through which the first axis extends and a reflective surface angled with respect to the first axis and second axis.

An assembly for measurements of one or more optical parameters of a medium is disclosed. The assembly comprises a light sheet generator, a light intensity modulator, a holder for a sample, and an optical sensor.

The light sheet generator is configured to provide a polychromatic light sheet comprising a light spectrum extending in a first spatial dimension, wherein the polychromatic light sheet has a propagation path in a second spatial dimension.

The light sheet generator comprises a light source configured to provide white light, a dispersive element configured to spread the white light in the first spatial dimension to provide the light spectrum, and an optical slit extending in the first spatial dimension configured to provide the polychromatic light sheet by limitation of the spread white light.

The light intensity modulator is configured to provide an intensity modulated polychromatic light sheet by applying—to the polychromatic light sheet—an intensity modulation having a periodical (or substantially periodical) pattern in the first spatial dimension.

The holder for a sample of the medium is configured to enable the intensity modulated polychromatic light sheet to illuminate the sample.

The optical sensor is configured to record intensity of light exiting the sample over the light spectrum for provision of the one or more optical parameters.

A method of using the assembly for measuring one or more optical parameters of a medium is also disclosed.

An assembly for measurements of one or more optical parameters of a medium is disclosed. The assembly comprises a light sheet generator, a light intensity modulator, a holder for a sample, and an optical sensor. A method of using the assembly for measuring one or more optical parameters of a medium is also disclosed.

A system for processing Raman scattering light from a sample is provided. The system includes a source, a digital mirror device (DMD), a detector, and an analyzer. The DMD is configured to reflect Raman scattering light and includes micromirrors selectively controllable between ON and OFF states. The detector is configured to detect Raman scattering light and to produce signals representative of the Raman scattering light. The analyzer is in communication with the light source, the DMD, the detector, and a memory storing instructions, which instructions when executed cause the processor to: a) control the light source to produce a beam of light for interrogating the sample; b) control the DMD to place in an ON or OFF state based on one or more known spectral shapes stored in the memory; and c) process the Raman scattering light reflected by the micromirrors in the ON state.

A dual camera module including a hyperspectral camera module, an apparatus including the same, and a method of operating the apparatus are provided. The dual camera module includes a hyperspectral camera module configured to provide a hyperspectral image of a subject; and an RGB camera module configured to provide an image of the subject, and obtain an RGB correction value applied to correction of the hyperspectral image.