Abstract:
A mechanism for bandwidth selection includes a dispersive optical element having a body including a reflective face of dispersion including an area of incidence extending in a longitudinal axis direction along the reflective face of the dispersive optical element The body also includes a first end block, disposed at a first longitudinal end of the body and a second end block, disposed at a second longitudinal end of the body, the second longitudinal end being opposite the first longitudinal end The bandwidth selection mechanism also includes a first actuator mounted on a second face of the dispersive optical element, the second face opposite the reflective face, the first actuator having a first end coupled to the first end block and a second end coupled to the second end block, the first actuator being operative to apply equal and opposite forces to the first end block and the second end block
Abstract:
Exemplary systems and methods for filtering an electromagnetic radiation can be provided. For example, at least one first arrangement can be provided which is capable of receiving at least one first electro-magnetic radiation and forwarding at least one second electro-magnetic radiation at different angles with respect to a direction of incidence of the first electro-magnetic radiation. At least one second wavelength dispersion arrangement can be provided which is configured to receive the second electro-magnetic radiation, forward at least one third electro-magnetic radiation to the first arrangement and further receive at least one fourth electro¬ magnetic radiation. The third electro-magnetic radiation can be based on the second electro-magnetic radiation, and the fourth electro-magnetic radiation can be based on the third electro-magnetic radiation. For example, the second arrangement can be configured to forward the second electro-magnetic radiation at different angles with respect to a direction of incidence of the at least one particular electro-magnetic radiation. Exemplary embodiments of methods can be provided to implement such exemplary techniques.
Abstract:
A miniature, flexible, fiber-optic scanning endoscope for nonlinear optical imaging and spectroscopy. The endoscope uses a tubular piezoelectric actuator for activating a cantilevered optical fiber from which pulsed light produced by a laser source exits and is directed to a target region through a micro-lens. The actuator is activated by two modulated signals that achieve two-dimensional beam scanning in a desired scan pattern. A double-clad optical fiber is employed for delivery of the excitation pulsed light and collection of emitted light received from the target region. The pulsed light travels through a core of the double-clad optical fiber, and the emitted light from the target region is directed into the core and inner cladding of the optical fiber and conveyed to a proximal end, for detection and processing. The emitted light can include multiphoton fluorescence, second harmonic generation light, and spectroscopic information, for imaging.
Abstract:
According to one aspect, an IR spectrometer includes a light source adapted to illuminate a sample, a grating (105) adapted to spectrally disperse a light that has illuminated the sample, a MEMS array (110) adapted to be electrostatically actuated by a controller to control a diffraction of the light, a detector (116) configured to detect the light, and a power source adapted to supply power to the light source and to the MEMS array, wherein the controller is adapted to control the MEMS array so as to manage a power consumption of the IR spectrometer. In one embodiment, the IR spectrometer includes a housing sized and arranged to house the light source, the grating, the MEMS array, the controller, the detector, and the power source in a hand-held device .
Abstract:
A spectrophotometer has a first photodetector (24) and a second photodetector (25) which is displaced spatially from the first photodetector in the direction of increasing wavelength in the spectrum. At any given time the second photodetector receives light at a wavelength which is substantially greater than that being received simultaneously by the first photodetector at that time. The first photodetector has a first range of wavelengths over which it is operable and a first upper operating limit, and the second photodetector has a second range of wavelengths over which it is operable and a second upper operating limit, the second range overlapping the first range and the second upper operating limit being greater than the first upper operating limit. Thus the range of operation is extended, and data in two different ranges is processed simultaneously. The spectrophotometer comprises a housing (1) containing a light source (11), a monochromator (15, 16, 18) and the photodetectors, there being a fibre optic connected to a probe (2) for transmitting light from the light source to a sample to be analysed and receiving light from the sample. Optical components are mounted to a chassis (26) of the housing rigidly, the chassis being connected to the housing by shock absorbing mounts (28, 29). The light source is mounted to the housing by means of an adjuster (24) providing for adjustment laterally with respect to the optical axis of the light source.
Abstract:
L'invention concerne un spectromètre (1) comportant un élément dispersif d'un faisceau lumineux formé d'un ensemble de composants spectraux, l'élément dispersif produisant une dispersion spatiale des composants spectraux sous forme d'un spectre de dispersion (6) spatialement étalé, au moins un détecteur photonique (5, 52) comportant au moins un élément de détection (51) étant disposé en un point de ladite dispersion. Selon l'invention, un dispositif électromicromécanique (3) optique matriciel est disposé entre l'élément dispersif et le détecteur dans le spectre de dispersion, ledit dispositif électromicromécanique étant formé d'une matrice d'éléments optiques, chacun des éléments optiques pouvant renvoyer une partie du spectre de dispersion selon au moins deux directions en fonction d'un signal de commande, afin de permettre la sélection d'au moins un sous ensemble du spectre pour ledit élément de détection. Un procédé et une application du spectromètre sont revendiqués.
Abstract:
A robotically controlled steerable gimbal (30) mounted virtual broadband hyperspectral sensor (40) system and methods provide a highly mobile, rapidly responsive and innovative system of locating targets and exploiting hyperspectral and ultraspectral imaging and non-imaging signature information in real-time from an aircraft or ground vehicles (V) from overhead or standoff perspective in order to discriminate and identify unique spectral characteristics of the target. The system preferably has one or more mechanically integrated hyperspectral sensors (40) installed on a gimbal backbone and coboresighted with a similarly optional mounted color video camera and optional LASER (47) within an aerodynamically stable pod shell constructed for three-dimensional stabilization and pointing of the sensor on a direct overhead or off-nadir basis.
Abstract:
An embedded data acquisition and control system for precision instruments is disclosed. It provides a synchronization of stepper motor position and analog-to-digital converter, in order to minimize the wavelength shift error due to the asynchronous. The controller synchronizes the event of reading the A/D converters with each stepper motor position. According to another future of the invention, a position encoder is coupled to the stepper motor shaft for archiving in an actual position feedback. Because the embedded controller has the position feedback, it can initiate the next step command as soon as the position feedback reaches its target. The step rate is increased by reducing the time delay that was set by conservative value as indicated in the open loop control mode. A further future of the invention provides optical isolation to minimize motor noise.
Abstract:
A fluorescence spectrophotometer having an excitation double monochromator (104), a coaxial excitation/emission light transfer module (106), and an emission double monochromator (110). Each monochromator includes a pair of holographic concave gratings (203, 210) mounted to precisely select a desired band of wavelengths from incoming broadband light without using other optical elements, such as mirrors. Selected excitation light is directed into a sample well (108) by a light transfer module (106) that includes a coaxial excitation mirror (302) positioned to directed excitation light directly to the bottom of a well (108) of a multi-well plate. Fluorescence emission light that exits the well opening is collected by a relatively large coaxial emission mirror (304). The collected emission light is wavelength selected by the emission double monochromator (110). Selected emission light is detected by a photodetector module (112).