A decrease in accuracy caused by influence of noise light is suppressed.

A spectroscopic device (1) includes a light source (2), a quantum optical system (4), a detection unit (6) that detects a light intensity of light output from the quantum optical system (4), and an analysis device (8), the quantum optical system (4) including one or more nonlinear optical elements (12) that generates a photon pair of idler light and signal light from the pump light in an entangled photon pair generation process, and a sample placement tool (35) that places a sample (SP) on an optical path of the idler light. The quantum optical system (4) is configured to emit first and second signal lights (s1, s2) along different optical paths, the detection unit (6) includes a beam splitter (40) that receives the first and second signal lights (s1, s2) from the quantum optical system (4), and detects a light intensity of each of two lights emitted from the beam splitter (40), and the analysis device (8) acquires an interferogram from the two lights detected by the detection unit (6).

A non-contact system for the sensing the concentration of a compound includes a hyperspectral imaging device configured to capture a hyperspectral image of a fluid, a flow cell configured to enable the capturing of a hyperspectral image of a fluid, a process, and a memory. The memory includes instructions stored thereon which, when executed by the processor, cause the system to generate a hyperspectral image of the fluid in the flow cell, generate several spectral signals based on the hyperspectral image, provide the spectral signal as an input to a machine learning network, and predict by the machine learning network the concentration of a compound in a fluid.

A monochromator apparatus in a grating-based optical spectrum analyzer (OSA) includes a diffraction grating element, a reflector element, and a tunable spectral filter. The tunable spectral filter may be placed in a ghost signal path between the diffraction grating element and the reflector element, or between the diffraction grating element and an output element to prevent an optical ghost signal from passing to the output element. The tunable spectral filter may include a band-pass filter, a low-pass filter, a high-pass filter, or a linear variable filter. A spectral window of the tunable spectral filter may move synchronously with a scanning spectral window of the OSA to reduce or eliminate the optical ghost signal.

A data processing apparatus, a method, a program, and a multispectral camera that can favorably remove an interference component and reduce noise included in a plurality of images output from an image sensor of a multispectral camera are provided. In a data processing method, first captured data that corresponds to a plurality of wavelength ranges output from an image sensor of a multispectral camera and that includes first noise is processed. In the data processing method, an interference removing parameter for removing an interference component included in the first captured data is acquired (step S30), and the interference component included in the first captured data is removed based on the interference removing parameter (step S40). Then, noise reducing processing of reducing second noise included in second captured data after interference removing is performed (step S60).