Abstract:
A radiation detection technique employs field enhancing structures and electroluminescent materials to converts incident Terahertz (THz) radiation into visible light and/or infrared light. In this technique, the field-enhancing structures, such as split ring resonators or micro-slits, enhances the electric field of incoming THz light within a local area, where the electroluminescent material is applied. The enhanced electric field then induces the electroluminescent material to emit visible and/or infrared light via electroluminescent process. A detector such as avalanche photodiode can detect and measure the emitted light. This technique allows cost-effective detection of THz radiation at room temperatures.
Abstract:
An illumination device is provided with a light source, a photodetector, and a support structure. The light source, which emits light, has light distribution in which a reference axis serves as an axis of symmetry or light distribution in which a plane including the reference axis serves as a plane of symmetry. A first light beam in the light is guided to the object to be illuminated. A second light beam in the light is guided to the photodetector. The photodetector detects intensity of the second light beam. The light source and the photodetector are supported by the support structure in positions and postures that allow the first light beam and the second light beam to be guided in an aforementioned manner. A traveling direction of the first light beam and a traveling direction of the second light beam make the same angle with the reference axis.
Abstract:
A control apparatus includes a slit plate including a plurality of rectangular slits with different widths. The control apparatus also includes an acquisition unit which acquires an incident spectrum from the rectangular slit. The apparatus also includes a slit selecting unit which acquires a half value wavelength of the incident spectrum on the basis of the incident spectrum, and performs a selection of one of the plurality of rectangular slits on the basis of the half value wavelength.
Abstract:
A hyperspectral imaging system and a method are described herein for providing a hyperspectral image of an area of a remote object. In one aspect, the hyperspectral imaging system includes a fore optic with optics for acquiring and projecting an image from a remote object, a scannable slit mechanism with a plurality of slits for receiving the projected image, where the projected image simultaneously illuminates two or more of the plurality of slits, a spectrometer for receiving and dispersing images passing through the two or more simultaneously-illuminated slits, and a two-dimensional image sensor for recording images received from the spectrometer, where the images received from different slits are recorded on different sets of detection elements of the two-dimensional image sensor.
Abstract:
An airborne hyperspectral scanning system with a reflective telecentric relay including a system housing fore-optics, mounted in the housing, an imaging spectrometer mounted in the housing, the imaging spectrometer comprising a spectrometer slit, the spectrometer slit having an exit side and an entrance side, a focal plane array, a fold mirror, and at least three spectrometer mirrors, ordered sequentially, and in optical alignment with each other, and a reflective telecentric relay, mounted in the housing between the fore-optics and the imaging spectrometer, the reflective telecentric relay comprising a collimator module, a scanning mirror module, and an objective module, the objective module being situated to receive intermediate image from the fore-optics and reflect a collimated beam to the scanning mirror image between the collimator module and the objective module, wherein the objective module is situated to form a telecentric image at the entrance of the spectrometer slit.
Abstract:
A spectrometer comprises a package having a stem and a cap, an optical unit arranged on the stem, and a lead pin penetrating through the stem. The optical unit has a dispersive part for dispersing and reflecting light entering from a light entrance part of the cap, a light detection element for detecting the light dispersed and reflected by the dispersive part, a support for supporting the light detection element such as to form a space between the dispersive part and the light detection element, a projection projecting from the support, and a wiring electrically connected to the light detection element. The projection is arranged at such a position as to be in contact with the stem. The lead pin is electrically connected to a second terminal part of the wiring arranged in the projection.
Abstract:
A spectrometer, in particular for being installed in a sensor module of a fluid analysis system, including a radiation source and the following components defining a beam path or being arranged along the beam path: a sample chamber for a fluid to be examined, a first lens, a diffraction element, a second lens and a detector. A restriction aperture for restricting the effective diameter of the light beam incident on the diffraction element is provided between the sample chamber and the diffraction element.
Abstract:
An optical wavelength dispersion device includes a first substrate; an input unit formed on the first substrate having a slit for receiving an optical signal; a grating formed on the first substrate for producing a first light beam form the optical signal for outputting; and a second substrate covered on the top of the input unit and the grating; wherein the input unit and the grating are formed from a photo-resist layer by high energy light source exposure.
Abstract:
Disclosed is a spectrum measuring apparatus for shortening such a measurement time period for an object being measured including two or more mutually different measurement portions as is required for the spectrum measurements of the lights from individual measurement portions. The spectrum measuring apparatus comprises a slit group having two or more slits, a spectroscope for separating the lights extracted by the slit group, for the individual slits, and a measuring unit for measuring the intensities of the individual components, which are separated by the spectroscope, for the slits. The individual slits extract such ones of the lights coming from an object being measured including two or more mutually different measurement portions, as come from the individual measurement portions.
Abstract:
A system and method of photon trapping spectroscopy to vary the path length of light for use in spectroscopy. The systems and method include a rotating reflector with slits for selectively permitting light to enter and exit into a reflection cavity containing a sample to be analyzed. After entering the cavity, but before exiting, the light is trapped and repeatedly reflects back and forth through a sample, effectively increasing the path length of light through a sample. The effective path length is quickly adjustable by altering the rotation speed of the rotating reflector to alter the time in which the light is trapped within the cavity. The systems and methods provide a spectroscope with a wide dynamic range, low detection limits, and usable with broadband and monochromatic light sources throughout the optical region (ultraviolet to infrared).