318 results about "Filter wheel" patented technology

The present invention relates to the production of instantaneous or non-instantaneous multi-band images, to be transformed into multi- or hyperspectral images, comprising light collecting means (11), an image sensor (12) with at least one two dimensional sensor array (121), and an instantaneous colour separating means (123), positioned before the image sensor array (121) in the optical path (OP) of the arrangement (1), and first uniform spectral filters (13) in the optical path (OP), with the purpose of restricting imaging to certain parts of the electromagnetic spectrum. The present invention specifically teaches that a filter unit (FU) comprising colour or spectral filter mosaics and / or uniform colour or spectral filters mounted on filter wheels (114) or displayed by transmissive displays (115), is either permanently or interchangeably positioned before the colour separating means (123) in the optical path (OP) in, or close to, converged light (B). Each colour or spectral filter mosaic consists of a multitude of homogeneous filtering regions. The transmission curves (TC) of the filtering regions of a colour or spectral filter mosaic can be partly overlapping, in addition to overlap between these transmission curves and those belonging to the filtering regions of the colour separating means (123). The transmission curves (TC) of the colour or spectral filter mosaics and the colour separating means (123) are suitably spread out in the intervals of a spectrum to be studied. The combination of the colour separating means (123) and the spectral or colour or spectral filter mosaics produces different sets of linearly independent transmission curves (TC). The multiple-filter image captured by the image sensor (12) is demosaicked by identifying and segmenting the image regions that are affected by the regions of the multiple filter mosaic, and after an optional interpolation step, a multi-band image is obtained. The resulting multi-band image is transformed into a multi- or hyperspectral image.

Provided are an optical detection apparatus which can measure multi-channel samples at high speed and various wavelengths using an optical detector and a multi-channel sample analyzer employing the same. The optical detection apparatus includes an optical detector; a filter wheel having at least two color filters connected to each other in the shape of a disk; a plurality of optical channels through which a plurality of beams of light enter the filter wheel; and a mirror unit including a plurality of mirrors for sequentially reflecting the plurality of beams of light transmitted through the filter wheel to the optical detector, wherein the mirror unit rotates together with the filter wheel.

The addition of DMD illumination modulator(s) 702 in series with projection SLM(s) 706 / 709 to produce high-performance projection displays with improved optical efficiency, reliability, and lower maintenance requirements. This approach eliminates the vibration, audible noise, and safety problems associated with high speed rotating color filter wheels 203 commonly used in SLM projectors and controls the light applied to individual areas of the projection SLM(s).

A number of laser beam stations emit vertically separated parallel planes and / or ray-planes of laser light that can be discriminated by their respective plane elevations, modulation of the laser light, time synchronizing, etc. Identifying the laser plane would also imply an identification of the source laser beam station, and thus a precise indication of the elevation at the point of optical intercept. Alternatively, a single laser beam station is used that can emit several different monochromatic color planes and / or ray-planes of laser light. Monochromatic laser diodes, for example, are used for point-light sources and rotating or on-end conical mirrors are used to convert the diode laser light to the required monochromatic color planes and / or ray-planes of laser light. Receivers, generally held on masts attached to motor grader, bulldozer, loader, and excavator machines are used to sense the vertical reference position of the monochromatic color planes and / or ray-planes of laser light, relative to the earth cutting blade of the machine. Fixed-color filters, color filter wheels, and / or linear array photodetectors are used to discriminate amongst the colors and to exactly sense the plane of intersection with the machine. The results of the sensing are either displayed to an equipment operator for manual adjustment of the blade to an automatic servo control system connected to hydraulically control the blade.

An optical gun sight system for an M1A2 Abrams Main Battle Tank supported in a lower housing which may be attached to the fixed internal upper housing in the turret of the tank. An adapter plate is provided which has two sets of openings, one to align with the openings in the upper housing and the other to align with openings in the lower housing. An alignment mechanism allows for fine adjustment of the lower housing relative to the upper housing. Operating buttons, knobs and filter wheel are conveniently located on or beneath the front face of the lower housing. A thermal imaging system includes an objective lens for receiving an image of a target object, an eyepiece lens for viewing the image of the object, and a compensator lens movably located between the objective and eyepiece lenses for providing a thermal image of the object. The system includes a servo motor control system for controlling the position of the compensator lens based upon temperature, range and field of view to provide an accurate thermal image of the object.

The invention discloses a laser source comprising a laser device, a fluorescent wheel, a color filter wheel. The fluorescent wheel is excited by laser to emit fluorescence. The laser emitted from the laser device passes through a first diffusion slice before reaching the fluorescent wheel. The first diffusion slice is fixedly arranged. After being combined, the laser and the fluorescence pass through a second diffusion slice before being subjected to color filtering of the color filter wheel. The second diffusion slice is controlled to rotate. The cooperation of the first diffusion slice and the second diffusion slice effectively increases the spatial random phase of the laser, forms multiple independent speckle patterns, effectively weakens a speckle effect, and improves projection image display quality.

The invention discloses a laser light source and a projection display device. Red light emitting efficiency is improved, and accordingly the advantage of improving overall brightness of the laser light source is achieved. The laser light source comprises an excitation light source body, a fluorescent wheel, a color filtering wheel and a control unit. The fluorescent wheel comprises a reflection portion and a transmission portion allowing the excitation light source body to transmit, and a fluorescent body capable of emitting yellow light after being excited by the excitation light source body and a fluorescent body capable of emitting green light after being excited by the excitation light source body are attached to the surface of the reflection portion. The color filtering wheel comprises a transparent portion, a red color filtering portion and a green color filtering portion. The control unit controls the fluorescent wheel and the color filtering wheel to rotate synchronously, the transparent portion of the color filtering wheel corresponds to the transmission portion of the fluorescent wheel and a part of the fluorescent body capable of emitting the yellow light after being excited by the excitation light source body, the red color filtering portion of the color filtering wheel corresponds to the other part of the fluorescent body capable of emitting the yellow light after being excited by the excitation light source body, and the green color filtering portion of the color filtering wheel corresponds to the a fluorescent body capable of emitting the green light after being excited by the excitation light source body.

The invention relates to a light source module and a projection device employing the same. The light source module comprises a monochromatic light source, a rotation wheel and a filtering wheel, wherein the monochromatic light source is used for sending first color light, the rotation wheel can rotate relatively to an axis and is provided with a light transmitting area and a light wavelength conversion area, the light wavelength conversion area is coated with a first light wavelength conversion material, the first light wavelength conversion material can be used for transforming the first color light into second color light, the filtering wheel rotates with the rotation wheel at the same speed around the axis and is provided a first color light filtering area and a second color light filtering area, the first color light filtering area and the second color light filtering respectively correspond to the light transmitting area and the light wavelength conversion are; when entering the light transmitting area, the first color light passes through the rotation wheel and then passes through the first color light filtering area; and when entering the light wavelength conversion area, the first color light is transformed into the second color light and passes through the second color light filtering area. The light source module is used for providing a projection light source.

The invention discloses a photoacoustic and fluorescence dual-mode integrated tomography imaging system and a photoacoustic and fluorescence dual-mode integrated tomography imaging method. The system comprises a modulation laser light source (1), a vibrating mirror (2), a sample rotary table (3), a filtering wheel (4), a gating intensified charge-coupled device (ICCD) camera (5), a photoacoustic detection acquisition module (6), a system control module (7), a computer (8), a data bus (9) and a control bus (10), wherein the vibrating mirror, the sample rotary table, the filtering wheel and the gating ICCD camera are positioned on the same straight line with the direction of lasers; the ultrasound transduction array normal direction of the photoacoustic detection acquisition module is perpendicular to the straight line to form a crossed vertical detection mode. According to the imaging method, light absorption distribution formed by photoacoustic tomography imaging is used as prior information for the reestablishment of fluorescence tomography imaging, and the positions of fluorophores, fluorescent yield and fluorescence lifetime parameters are reestablished by an iterative method. By the photoacoustic and fluorescence dual-mode integrated tomography imaging system and the photoacoustic and fluorescence dual-mode integrated tomography imaging method, the imaging complexity can be reduced, the cost of hardware can be saved, and the flexibility of the system and the reestablishing accuracy of the fluorescence tomography imaging can be improved.

The invention discloses a seashell digger which is an automatic ship type digging machine widely applicable to digging seashell products such as razor clams, clams and sea cucumbers on intertidal zones of coastal areas. The seashell digger structurally mainly comprises a ship, a driving machine, a crane, a mud filter wheel, a hydro-extracting wheel, a conveyor and the like. The mud filter wheel comprises a mud axle, rowed claws, claw nails and the like, the ship can be pushed to forwardly run under the rotation action of the mud filter wheel, an elbow is further arranged at the tail end of each claw nail of the rowed claws, and working clearance is reserved between the elbows of each two adjacent claw nails, so that seashells can be automatically dug when the mud filter wheel rolls forwardly. The seashell digger has the advantages that the digger is low in manufacturing cost and is effectively adaptive to severe working environments; the seashell digger only needs to mechanically run forwardly, so that the seashells can be quickly, accurately and efficiently dug on a large scale, and the labor intensity of manual operation can be greatly relieved.

A method and apparatus for extracting synchronization information at the output of a projection apparatus, without modifying its rotating color segmented filter wheel or drive electronics. Three photodiodes, each with a different principle color filter, is placed at the projector output to detect output of the different colors in the filter wheel. An exclusive OR circuit is used to detect white light passing through the filter wheel.

A multispectral imaging color measurement system, comprising a dark room, a sample platform and an imaging device for capturing said object being measured; a controllable illumination device, a filter wheel unit, an imaging signal processing unit and an electronic control unit. A method for processing imaging signals of the multispectral imaging color measurement is also proposed. The multispectral imaging color measurement system and the method for processing imaging signals thereof can overcome the inaccuracy of traditional digital imaging systems and the limits of spectrophotometer systems and provide users in the textile industry with highly accurate color measurement and evaluation.

The invention discloses an annular optical filer wheel which comprises an optical filter unit, an optical filter wheel disc unit, a main supporting structure unit, a top flange unit, a driving mechanism unit and the like. The optical filter unit divides an optical system into eight imaging detection channels, namely, a red light channel, a green light channel, a blue light channel, a near-infrared channel, a panchromatic channel, a 0-degree polarized light channel, a 45-degree polarized light channel and a 90-degree polarized light channel. The annular optical filer wheel has the advantages of being capable of achieving multi-channel filtering, detecting different areas respectively at the same time and being rotated fast. After the annular optical filter wheel rotates by one circle, multi-spectral and polarization detection of each target area is finished. The annular optical filer wheel is particularly suitable for design of the filter wheels of optical systems of large diameters, large focal lengths and annular view fields.

A filter wheel having spirally shaped left and right channel 3D filters. The 3D filters are, for example, spectral separation filters. The filter is mounted, for example, close to an integrating rod output of a projector. The left and right channel filtered light scrolls across a modulation device which is energized with correspondingly scrolling left and right image data. In one embodiment, the integrating rod comprises mirrored surfaces to facilitate recycling of light reflected off the filter wheel. The filter wheel may be placed in a single or dual projector configuration. In one embodiment, the filters are fixed at the end of an integrating rod using “re-cycled” light to illuminate different channels of a projection system.

A system and a method for optimizing an iris setting, used in combination with a lamp, for each excitation wavelength for each carousel run in an apparatus for identifying and measuring bacteria in biological samples. The system includes a feedback control loop positioned between a filter wheel and an optical cup for measuring the intensity level of the excitation wavelength, and feeding this information to an iris having an iris setting control device such that the iris setting may be adjusted based upon the measured intensity level to control and optimize the level of light fed to the filter wheel from the lamp. The iris setting can be adjusted so that the level of light fed to the filter wheel remains constant during the lifetime of the lamp and to ensure that the level of light fed to the sample remains below the level at which photo-bleaching occurs.

FLIR kits are provided comprising optical and related components which can be commonly used for both navigational and targeting scenarios. Such components include a common detector interface, imaging optics, scanner, interlacer, filter wheel, and thermal reference sources with integrated chopper / rotator assembly, all of which when assembled form a stand-alone imaging sensor when combined with a common associated electronics subassembly. The kits are integrated into standard navigational and targeting platforms of the type found on the AH-64 Apache and RAH-66 Comanche attack helicopters.

The invention relates to the field of small animal molecular imaging, and provides an imitating CT scanning mode multispectral time domain fluorescence molecular tomography measuring system with ultrasensitive and high time-space resolution measurement performances so as to realize the high-quality multi-component multi-parameter imaging function. The imitating CT scanning mode multispectral time domain fluorescence molecular tomography measuring system comprises two picosecond semiconductor lasers, an optical fiber coupler, an incident optical fiber, an imaging cavity, a rotating platform, a receiving optical fiber, a motor driving filter wheel and a detection module, wherein the two picosecond semiconductor lasers and the optical fiber coupler are used for providing wavelength ultrashort laser required, the optical fiber coupler is used for coupling two same-frequency ultrashort laser pulses of different wavelengths into a bundle of laser according to fixed time interval, the incident optical fiber is used for projecting emergent laser of two or one of both picosecond semiconductor lasers onto an object, the imaging cavity and the rotating platform are used for realizing the imitating CT scanning mode, the receiving optical fiber is used for receiving reflective or transmitted laser from the object, and the detection module is used for receiving emergent light passing through corresponding filter pieces. The invention is mainly applied to the molecular imaging of small animals.

The invention discloses a multiple-grating monochrometer. The monochrometer mainly comprises a mono-light optical splitting system, a control system, a computer and a printer, wherein the splitting system and the control system are designed as one, the upper part of the device is a grating chamber, the lower part is a controller chamber; the grating chamber mainly comprises an entrance slit, two exit slits, a color filter group, two concave mirrors, a grating turntable, a reflector and a stepper motor, wherein the open or close size of the entrance and exit slits are controlled manually; the hardware circuit adopts a second-order Butterworth filter to perform anti-aliasing filtering, and the hardware 8-bit pulse width modulation method is used to realize the control of the stepper motor. The multiple-grating monochrometer overcomes the bottleneck of low data transmission speed caused by the use of the RS232 interface before and the USB2.0 interface is used to connect with the computer. A power distribution system, a grating turntable control system, a filtering wheel control system, a reflector control system and a high speed and high accuracy data acquisition system are integrated to increase the integration degree, reliability, control precision and scanning precision of the system. The newly provided automatic scanning multiple-grating monochromatic spectrometer system has wide development prospect.

The invention provides a laser fluorescent molecular imaging system and an instant fluorescent imaging method. The system and the method comprise an image processing part and an image collecting part, wherein, in the image collecting part, a controller is connected with a camera, a lens adjusting motor, a transmission filter wheel, a laser filter wheel, a laser light source, a white lamp and electronic control translation stages in three directions, controls the lens adjusting motor to change focus length and aperture of a lens, controls the transmission filter wheel and the laser filter wheel to rotate and respectively switch a transmission filter and a laser filter to the acting position, controls opening and closing of the laser light source and the white lamp, and controls motor shafts of the electronic control translation stages in three directions to move; and the image processing part is connected with the camera in the image collecting part, receives fluorescent images and white light images, performs automatic cutting, pseudo-color addition and photon number statistic processing in the automatic cut area on fluorescent images, and overlays the processed fluorescent imagesand the white light images to obtain laser fluorescent molecular images. The system and the method can be applied in the fields of fluorescent image acquisition and analysis, medicine research and development and the like.

A photodynamic therapy light source for treating skin conditions of a patient is disclosed which has a light source (10), a filter wheel (24), a light guide (60), and a control unit (40) for controlling the source. A spectral analyser (80) is included for analysing the spectrum received from a patient, and a camera (70) is also provided for taking images of the patient so that before and after treatment images can be taken for comparison purposes and for further diagnosis. A filter wheel (24) is provided which includes a number of filter elements (24′) for selectively enabling a particular bandwidth of illumination to be provided. The illumination from the unit (10) can be modulated so that a cyclic treatment of a period in which illumination is applied, followed by a period in which illumination is not applied is provided. The period in which illumination is applied can be further pulsed or modulated to provide a pulsed illumination to the patient during the period in which illumination is applied to the patient.

The invention discloses a wheel tread abrasion detection method based on a laser displacement sensor. The method includes the following steps: arranging a 2D laser displacement sensor that is positioned lower than a steel rail plane position outside a track; sectioning data corresponding to wheels by analyzing distribution rules of the number of output effective value data points, and filtering wheel brake disc and vehicle bottom device data that is inconsistent with the wheel data; on the basis of mounting position parameter values of the laser displacement sensor, converting a coordinate system xoy of the sensor into a tread reference coordinate system uov through coordinate rotation; combining contour data of standard wheels and data measured by the sensor, and obtaining complete contour data of wheels; and selecting data about the smallest wheel rim as optimal tread data, and calculating wheel tread abrasion, wherein a difference between a standard wheel rim height and an actual wheel rim height is a tread abrasion value. The method is simple in measuring principle, provides a stable system, and can meet actual demands of tread abrasion measurement.

A system for determining polarization profiles of points in a scene from video frames using Stokes parameters includes a scene having a region that emits scene light rays that correspond to the points in the scene, an optical chopper controller, a rotating Stokes filter wheel that includes five trigger holes, three rotating linear polarizers, a circular polarizer, and a reference screen, a color filter, a video camera having a video frame, and a computer system having a frame grabber apparatus. The scene light rays are transmitted through the Stokes filter and the color filter to the video camera. Images corresponding to the scene light rays are projected onto respective pixels in the video frame and recorded as two-dimensional (2-D) arrays, and the images corresponding to the scene light rays from four unique images, obtained from light transmitted consecutively through three linear polarizers and a circular polarizer of the rotating Stokes filter wheel, are used by programming in the computer system to calculate respective Stokes parameters of the points in the scene.

An excitation and detection system is provided for separately detecting different wavelengths of emission light emitted from a sample. The system comprises an excitation assembly to excite a sample and a detection assembly to receive fluorescence emitted from the sample. The detection assembly includes a multi-band dichroic member and at least first and second detection cameras. The multi-band dichroic member has a transmission / reflection characteristic with at least two transmissive regions separated from each other along the wavelength spectrum and with at least one reflective region separated from the transmissive regions along the wavelength spectrum. The dichroic member transmits fluorescence that aligns with the at least two transmissive regions to the first detection camera. The dichroic member reflects fluorescence that aligns with the reflective region to the second detection camera. The dichroic member multiplexes the detection of fluorescent signals without the use of a filter wheel in the detection assembly. The components of the detection assembly remain stationary throughout imaging of multiple colors, for example therefore allowing the use of two detectors to record images of three or more colors without the need for filter wheels or other moving components.

The invention provides a fluorescence molecule imaging device, comprising an excitation module and an imaging module, wherein the excitation module consists of an exciting light source, an exciting filter wheel, an exciting optical filter and a plurality of beams of optical fibers. The imaging module consists of a CCD (Charge Coupled Device) camera, a lens, a lens adjusting unit, an emitting filter wheel, an emitting optical filter and an imaging cavity. The exciting light source generates exciting light, which passes through the exciting optical filter in the exciting filter wheel, and then the exciting light of some set wave band is irradiated to the detected object evenly via one optical fiber; the detected object is excited to generate the fluorescence signal with wavelength longer than that of the exciting light; the signal passes through the emitting optical filter of the emitting filter wheel set in front of the lens, then the specific emitting fluorescence signal is received by the CCD camera, converted into an image signal and displayed in a computer. The fluorescence molecule imaging device is simple in design and structure, convenient in operation, low in cost, and is widely applied to the fields such as medical image and the like.

The invention discloses a light source. The light source comprises a laser emitting laser beams in at least one color; a fluorescent wheel used for receiving laser irradiation and generating fluorescence in at least one color; and a color filter wheel which comprises a color filter area and a transmission area, wherein the color filter area is used for receiving, filtering and outputting the fluorescence in the at least one color, and the transmission area is used for transmitting the laser beams in the at least one color. Through arranging microstructures on the incident surface and the light-emitting surface of the transmission area, while the laser beams are transmitted, diffusion speckle dissipation can also be performed on the laser beams, functions of the color filter wheel part are diversified, application of individual speckle dissipation parts can also be omitted or reduced in light source configuration, and simplification of the light source configuration and compression of light source volume can be facilitated. The invention also provides a laser projection apparatus applying the light source provided by the technical scheme.

The invention discloses a device capable of improving measurement precision of gas analysis instrument, which comprises a filter wheel which is provided with a plurality of infrared filters; an electric motor which is used to drive the an infrared stationary light source and a monolithic system, wherein, a plurality of infrared filters are arranged on the filter wheel, the electric motor is used to drive the filter wheel to rotate against a preset frequency; an infrared stable light source which is used to irradiate a detecting gas cell through the infrared filters and is provided with an infrared sensor behind the detecting gas cell to receive the beam from the infrared stable light source; a single chip system which is used to control the drive of the electric motor and conduct wavelet contraction thresholds filtering on the signals received by the infrared sensor. The method and device of the invention are optimized by decomposing Haar wavelet and rebuilding wavelet, multiplication is transferred to addition in wavelet transform and meanwhile section wavelet filtering is adopted, which reduces operation volume, can be applied on a single chip system or imbedded system, effectively reducing the noise signals of gas analysis instrument, improving the measurement precision and decreasing the dependence on the hard circuit filter and model selection.

The invention belongs to the technical field of spectral imaging equipment, and relates to a wavelength-adjustable hyperspectral imager device. A transparent window is designed on the circumference ofa filter wheel; a testing light source and a photodetector are mounted on a coaxial optical path corresponding to the transparent window so as to accurately locate wavelengths; the wavelength-adjustable hyperspectral imager device is produced by combining the filter wheel, the light source, a front objective lens, a lens combination, a sensor and simple mechanical brackets; a motor drives the filter wheel to rotate to change optical filters working in optical path of a lens combination-sensor to accurately determine different wavelengths; the front objective lens receives natural scattered light emitted by the light source, the natural scattered light forms parallel light after passing through the lens combination, a light signal of the parallel light is detected by the sensor and then converted into an analog current signal, the analog current signal is amplified and analog-digital conversion is performed on the analog current signal. The wavelength-adjustable hyperspectral imager device can achieve acquisition, storage, transmission, processing and recurrence of an image, and is suitable for the spectral range of 200-2500nm, especially suitable for a deep ultraviolet light waveband.

A filter wheel capable of executing continuous operation accurately is implemented. The filter wheel comprises a first pulley fixed to a rotation axle of a motor, a filter set table (a second pulley) on which a plurality of filters circularly arranged at equal intervals between a center axis and an outer periphery thereof are mounted, and a belt engaged with respective outer peripheries of the first pulley, and the filter set table, for conveying rotation of the motor to the filter set table through the intermediary of the first pulley, wherein upon an increase in diameter of the filter set table, due to a change in size of the filter, a third pulley is formed inside a space formed when the plurality of the filters are disposed in a circular fashion on the filter set table so as to be integral with the filter set table, the belt being engaged with the respective outer peripheries of the first pulley, and the third pulley.

A method for measuring NOx having a specific discharge lamp. The method controls a photometric analysis device, in which an electrically rotatable filter wheel or shutter wheel is used to change various shutters and / or filters in a beam path with beam source, cuvette and detector. The filter and / or shutter wheel is controlled in such a way that the measurement time is greater than the transfer time. This control improves the detection limit of the NOx resonance absorption method.

The invention discloses a light source device comprising an exciting light source used for producing exciting light and a wavelength conversion device arranged in the propagation light path of exciting light. The wavelength conversion device comprises a reflection area and a wavelength conversion area, and the wavelength conversion area is provided with a wavelength conversion material used for converting the received exciting light into excited light of preset wavelength. The light source device further comprises a polarization device, a polarization conversion assembly and a filter group, which are sequentially arranged on a light path between the exciting light source and the wavelength conversion device. The invention further discloses a projection system. Through the technical scheme, the light paths of exciting light and excited light can be separated, and compared with the prior art, exciting light in excited light can be filtered without filter wheels. The light source device and the projection system have the advantages of simple overall structure, compact layout, low production cost, high reliability, and the like.