Various embodiments disclosed herein describe a divided-aperture infrared spectral imaging (DAISI) system that is adapted to acquire multiple IR images of a scene with a single-shot (also referred to as a snapshot). The plurality of acquired images having different wavelength compositions that are obtained generally simultaneously. The system includes at least two optical channels that are spatially and spectrally different from one another. Each of the at least two optical channels are configured to transfer IR radiation incident on the optical system towards an optical FPA unit comprising at least two detector arrays disposed in the focal plane of two corresponding focusing lenses. The system further comprises at least one temperature reference source or surface that is used to dynamically calibrate the two detector arrays and compensate for a temperature difference between the two detector arrays.

An optical device includes a door, a door control unit, a polarized light generation unit and a spectrum response analysis unit. The polarized light generation unit and the spectrum response analysis unit are located at a first side of the door. When the door is opened by the door control unit, a polarized light from the polarized light generation unit is transmitted through the door and externally projected on an under-test object at a second side of the door, so that a scattered light is generated. After the scattered light is returned back and transmitted through the door, the scattered light is projected on the spectrum response analysis unit, so that the spectrum response analysis unit performs a spectrum response analysis. The optical device has enhanced signal-to-noise ratio. Moreover, the optical device is capable of acquiring more explicit and diverse inherent information of the under-test object.

Various embodiments disclosed herein describe a divided-aperture infrared spectral imaging (DAISI) system that is adapted to acquire multiple IR images of a scene with a single-shot (also referred to as a snapshot). The plurality of acquired images having different wavelength compositions that are obtained generally simultaneously. The system includes at least two optical channels that are spatially and spectrally different from one another. Each of the at least two optical channels are configured to transfer IR radiation incident on the optical system towards an optical FPA unit comprising at least two detector arrays disposed in the focal plane of two corresponding focusing lenses. The system further comprises at least one temperature reference source or surface that is used to dynamically calibrate the two detector arrays and compensate for a temperature difference between the two detector arrays.

Various embodiments disclosed herein describe a divided-aperture infrared spectral imaging (DAISI) system that is adapted to acquire multiple IR images of a scene with a single-shot (also referred to as a snapshot). The plurality of acquired images having different wavelength compositions that are obtained generally simultaneously. The system includes at least two optical channels that are spatially and spectrally different from one another. Each of the at least two optical channels are configured to transfer IR radiation incident on the optical system towards an optical FPA unit comprising at least two detector arrays disposed in the focal plane of two corresponding focusing lenses. The system further comprises at least one temperature reference source or surface that is used to dynamically calibrate the two detector arrays and compensate for a temperature difference between the two detector arrays.

A divided-aperture infrared spectral imaging (DAISI) system that is structured to provide identification of target chemical content in a single imaging shot based on spectrally-multiplexed operation. The system is devoid of spectral scanning acquisition of infrared (IR) spectral signatures of target content with an IR detector and does not require content.

The invention provides a spectroscopic instrument, which comprises a projecting optical system for projecting a projecting light emitted from a light source, a photodetecting optical system for receiving a reflection light from an object to be measured and for guiding to a photodetection member, and a spectroscope for detecting a condition of the object to be measured based on the reflection light as received by the photodetection member, wherein the projecting optical system and the photodetecting optical system have a projecting system chromatic aberration decreasing component and a photodetecting system chromatic aberration decreasing component which eliminate chromatic aberrations, respectively.

A spectrometric measuring head for forestry, agricultural and food industry applications comprises a housing having a window and a spectrometer that is arranged inside the housing and comprises a dispersive element and a sensor, a first light source for exposing a sample to light, which reaches the spectrometer through the window after having been transmitted and/or reflected by the sample, and a standard that can be exposed to light to provide a reference for the spectrometer, which standard can be exposed to light by a light source arranged in the housing.

An apparatus for the creation of works having the same creative look and feel as works filmed via the original Technicolor three-strip filming process comprising: a camera, a lens mounted on said camera, a step-up, lens-filter adapter ring mounted on said lens of said camera, a diffusion filter mounted on said step-up, lens-filter adapter ring, said diffusion filter capable of mimicking the effect of traditional silver nitrate film used in the Technicolor process, and an optical band-stop filter mounted on said the diffusion filter, said optical band-stop filter capable of preventing the transmission of light having a 570-600 nm wavelength and permitting no more than 20% light from being transmitted through it.

A wide angle dispersing light fixture comprising a clear bowl-shaped outer housing having an inner surface, and an outer surface mirrorized with RUSTOLEUM MIRROR EFFECT, silver, SKU NO. 26772, and a candelabra style fixture capable of receiving a multiplicity of light bulbs, said light bulbs being Hypericon A21 LED BULBS having an extended CRI of 94 or higher, and capable of providing R-9 and an unbroken spectrum of light capable of working in daylight balance between 4800 and 5600 kelvin.

A chromatic exposure meter comprising an eyecup and a spectroscope having multiple glass-prisms, a nanometer scale and a control that can open and close the iris/slit to change the amount of light that enters the spectroscope, said spectroscope further uprising an ISO Wheel having a scale for 12, 25, 50, 100, 200, 400, 800, 1600, 3200, and 6400, a free-moving Shutter Speed Wheel equipped with a Shutter Speed scale of 1/800, 1/400, 1/200, 1/100, 1/50, 1/25, 1/12, 1/6, 1/3, and 1/1.6 of a second, a free moving F-Stop Wheel equipped with an f-stop scale of 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, and 32 and a Rainbow Calibrator scale, and a fixed Foot Candle Wheel correlating to the Iris-loot Candle Measure, and equipped with a scale of 3, 6, 12, 25, 50, 100, 200, 400, 800, 1600, 3200, and 6400-foot candles.

A hyperspectral sensing device may include an optical collector configured to collect light and to transfer the collected light to a sensor having spectral resolution sufficient for sensing hyperspectral data. In some examples, the sensor comprises a compact spectrometer. The device further comprises a power supply, an electronics module, and an input/output hub enabling the device to transmit acquired data (e.g., to a remote server). In some examples, a plurality of hyperspectral sensing devices are deployed as a network to acquire data over a relatively large area. Methods are disclosed for performing dark-current calibration and/or radiometric calibration on data obtained by the hyperspectral sensing device, and/or another suitable device. Data obtained by the device may be represented in a functional basis space, enabling computations that utilize all of the hyperspectral data without loss of information.

A spectrometer system comprises a housing provided with a window, an illumination source, a spectrometer and a standard for internal recalibration being disposed in said housing. Specific absorption bands of a filling gas present in the housing are identified in a reference spectrum, which was recorded using the standard, wherein a wavelength characterizing the relevant identified specific absorption band is measured in each case such that measured values are obtained for the wavelengths of the absorption bands. A test spectrum is recorded by the spectrometer using the standard. The specific absorption bands of the filling gas are identified in the test spectrum, wherein a wavelength characterizing the relevant identified specific absorption band is measured in each case such that measured values are obtained for the wavelengths of the specific absorption bands.