Provided is an imaging apparatus including: a splitter that splits incident light into pieces of light of two or more wavelength bands; and two or more detectors that detect the pieces of light of two or more wavelength bands respectively and output signals from which wavelengths can be extracted tunably by post-processing.

A spectrum measurement apparatus includes: a plurality of light sources configured to emit light having different wavelengths to an object; a light detector configured to receive light, which is reflected or scattered from or transmitted through the object, and to measure an intensity of the received light; and a processor configured to determine a strength of an electric signal to be applied to at least one of the plurality of light sources by using one of the plurality of light sources, and by applying the electric signal having the determined strength to the plurality of light sources to obtain a spectrum of the object.

An intensity spectrum designing unit of a data generating device includes an initial value setting unit that sets a plurality of objects of a first generation of an intensity spectrum function A(?) and a phase spectrum function ?(?), an evaluation value calculating unit that calculates an evaluation value for each of a plurality of objects of an n-th generation, an object selecting unit that selects two or more objects used for generating a plurality of objects of an (n+1)-th generation among objects of the n-th generation on the basis of superiority of the evaluation value, and a next-generation generating unit that generates a plurality of objects of the (n+1)-th generation on the basis of the selected two or more objects. The evaluation value calculating unit, the object selecting unit, and the next-generation generating unit repeat processes while 1 is added to n until a predetermined condition is satisfied.

Systems, methods, apparatuses, and articles of manufacture are provided for recovering a digitized spectrum and may comprise: an optical system configured to transform rays, the optical system including a diffraction grating, a steering mirror, a stage, and an actuator configured to move one of the stage, diffraction grating, or steering mirror according to a movement regime to vary an incidence of the rays on the stage; a sensor array disposed on the stage configured to receive the rays incident from the optical system at a plurality of measurement locations to obtain a plurality of ray spectra; and a processor electrically connected to the sensor array configured to receive the ray spectra, interleave the ray spectra to yield an interleaved spectrum, and deconvolve a point spread function corresponding to the optical system from the interleaved spectrum to yield a recovered digitized spectrum.

Systems for and methods for in situ optimization of tunable light emitting diode sources are disclosed herein. During operation, the systems and methods obtain real-time feedback from an image sensor, and that feedback is used to tune the tunable LEDs. By tuning the tunable LEDs, the best values for the LED spectral output can be selected based on the feedback from the image sensor, and an image with improved contrast is obtained. Alternatively, the amount of time to obtain an image with acceptable contrast is reduced.

A divided pulse nonlinear optical source may be generated by combining nonlinear wave generation techniques with pulse division that can divide a parent pulse into N divided pulses, each divided pulse separate temporally. The N divided pulses can be passed into a nonlinear optical medium to generate an output. The output can include at least one output pulse for each divided pulse. The center wavelengths of each output pulse can be tuned so that each may have a center wavelength that is the same as, or differs from, each other output pulse. In some embodiments, the output pulses may be combined to generate the output. The output can be power scalable and wavelength tunable.

Systems and techniques for multispectral lighting reproduction, in one aspect, include: one or more light sources having different lighting spectra; and one or more computers comprising at least one processor and at least one memory device, the one or more computers programmed to drive the one or more light sources directly using intensity coefficients that have been determined by comparing first data for a multi-color reference object photographed by a camera in a scene with second data for the multi-color reference object photographed when lit by respective ones of the different lighting spectra of the one or more light sources.

A spectrometer includes an illuminating section; a receiving section configured to detect radiation reflected from an object including an optically inhomogeneous scattering medium; a hardware section configured to obtain a solution of an inverse problem to reconstruct an absorption spectrum of the optically inhomogeneous scattering medium, wherein the illuminating section includes at least one light-emitting diode source, a radiation spectral curve of which is divided, by at least two spectral filters having different spectral transmission curves, into at least two spectral regions, to form an equivalent radiation spectrum from at least two spectral sources, and wherein the hardware section applies the solution of the inverse problem based on information about a spectral content of the radiation of the illuminating section, a signal obtained in a form of a response from the optically inhomogeneous scattering medium, and a spectral sensitivity curve of the receiving section.

Systems, methods, apparatuses, and articles of manufacture are provided for recovering a digitized spectrum and may comprise: an optical system configured to transform rays, the optical system including a diffraction grating, a steering mirror, a stage, and an actuator configured to move one of the stage, diffraction grating, or steering mirror according to a movement regime to vary an incidence of the rays on the stage; a sensor array disposed on the stage configured to receive the rays incident from the optical system at a plurality of measurement locations to obtain a plurality of ray spectra; and a processor electrically connected to the sensor array configured to receive the ray spectra, interleave the ray spectra to yield an interleaved spectrum, and deconvolve a point spread function corresponding to the optical system from the interleaved spectrum to yield a recovered digitized spectrum.

Optical analysis systems and methods may be used for analyzing the characteristics, including compositions, of cement additives, which may be used in formulating a cement slurry. For example, a cement additive may be optically interacting with an integrated computational element (ICE) configured to detect a characteristic of the cement additive. An output signal may then be generated corresponding to the characteristic of the cement additive detected by the ICE, which may be received and processed with a signal processor to yield a value for the characteristic of the cement additive. The value of the characteristic of the cement additive may then be used to determine an amount of the cement additive for use in producing a cement slurry.