A measuring device includes an optical device which includes a window on which light is incident, a shutter which includes a white reference surface on an optical device side and is configured to block the window, a first moving mechanism which moves the optical device in a direction, and a second moving mechanism which relatively moves the window and the shutter between a first position at which the window is blocked by the white reference surface and a second position at which light is incident on the window.

An endoscopic imaging system for use in a light deficient environment includes an imaging device having a tube, one or more image sensors, and a lens assembly including at least one optical elements that corresponds to the one or more image sensors. The endoscopic system includes a display for a user to visualize a scene and an image signal processing controller. The endoscopic system includes a light engine having an illumination source generating one or more pulses of electromagnetic radiation and a lumen transmitting one or more pulses of electromagnetic radiation to a distal tip of an endoscope.

A method and spectral light-based apparatus with an embedded (built-in) spectral calibration module for acquiring multi-spectral reflectance images from a digital camera are disclosed. The apparatus may be an attachment device, which may be integrated with a consumer digital camera (such as smartphone camera), and may measure and/or estimate spectral reflectance and true color values for an object recorded by the camera. An example apparatus comprises an array of monochromatic light sources, preferably pulsed LEDs, irradiating in a time-multiplexed manner to generate light spectra in the range of 400 nm-1000 nm, an optical lens to limit the field of view of the attached camera, an electro-mechanical shutter or plate with its inner (reflection) surface coated with a diffuse reflectance standard to ensure flat spectral response, and an interface module for synchronizing the time-multiplexed light spectra with the coated shutter opening and closing and with the digital frames acquired by the camera, such that the true spectral reflectance and true color value of an object can be measured.

A spectral imaging system configured to obtain spectral measurements in a plurality of spectral regions is described herein. The spectral imaging system comprises at least one optical detecting unit having a spectral response corresponding to a plurality of absorption peaks of a target chemical species. In an embodiment, the optical detecting unit may comprise an optical detector array, and one or more optical filters configured to selectively pass light in a spectral range, wherein a convolution of the responsivity of the optical detector array and the transmission spectrum of the one or more optical filters has a first peak in mid-wave infrared spectral region between 3-4 microns corresponding to a first absorption peak of methane and a second peak in a long-wave infrared spectral region between 6-8 microns corresponding to a second absorption peak of methane.

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.

The present disclosure relates to the field of optical systems. The envisaged multi-scan optical system is compact and stable. The system comprises an excitation source, a hydra fiber cable, a wavelength selector, an optical element, and a detector. The excitation source is configured to emit composite light. The hydra fiber cable has a head and a plurality of tentacles, and is configured to receive the composite light via a second lens. The plurality of tentacles is configured to emit the composite light towards the wavelength selector which includes a plurality of optical slits (s1-s8) and a plurality of shutters. The wavelength selector is configured to selectively collect and filter the composite light directed by a first lens and the plurality of tentacles by means of the plurality of shutters. The detector is configured to detect the plurality of spectral line scans reflected by the optical element for spectrometric analysis.

A microscopic Raman device includes: a sample set unit that has a cover which is openable and closable, and that stores a sample therein; a first laser light source that generates first laser light to be projected onto the sample; a shutter disposed on a first light path which is a light path of the first laser light from the first laser light source to the sample; a shutter drive unit that opens and closes the shutter; and a sensor. The shutter drive unit is configured to close the shutter when the sensor senses that the cover starts to be opened. The shutter blocks the first laser light when closed.

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, , , 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.

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.

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.