116 results about "Diffuse transmission" patented technology

There is provided a light source unit comprising a luminescent plate having a luminescent light emission portion and a diffuse transmission portion, a first light source which emits light of a wavelength band which can excite the luminescent material, a second light source which emits light of a wavelength band which differs from the luminous light and the light emitted from the first light source, a light guiding optical system which guides light of respective wavelength bands in color emitted from the luminescent plate to a predetermined plane, and a light source control part for controlling individually the emission of light from the first light source and the second light source, wherein the luminescent plate is disposed on optical paths of the first light source and the second light source, wherein a light shining position of light from the first light source and a light shining position of light from the second light source are made to differ from each other on the luminescent plate, and wherein the light source control part controls so that the first light source and the second light source emit light simultaneously or separately to thereby emit synthesized light or monochromatic light.

The invention discloses a scattering determination and corrector method of a taper bunch CT system. After arranging a parameter, an air projected picture and a beam attenuation grid projected picture are collected. A circular scanning is carried out on the detected object. A projected picture set I of the detected object with beam attenuation grid and a projected picture set II of the detected object are collected. The projected attitude of the center of each metal ball in the beam attenuation grid is calculated. A scattered field distributing image corresponding to the projected picture of the projected picture set I is calculated through a beam attenuation grid corrector method. A projected picture set III after scattering correction is gained through the projected picture set I subtracting the corresponding scattered field distributing image. Thereby, a sequence slice image after scattering correction is reconstructed through a filter back-projection reconstruction method. The invention can be applied to the scattering correction of the taper bunch CT system from low energy to medium or high energy. The invention is a simple and effective scattering correction method of the taper bunch CT system.

A dye sensitize solar battery based on the light scattering membrane electrode of the titanium dioxide Nano Rods is provided, which belongs to technical field of solar battery manufacturing. The invention comprises light anode, electrolyte solution and counter electrode, which is characterized in that the said light anode includes in turn the first layer closely connected with the conducting fundus and the second layer contacted with the first layer. The first layer is a dense TiO2 thin membrane formed by the TiO2 particles of 2 to 5 nm in grain diameter, while the second layer is a Nano Rods thin membrane formed by the TiO2 tiny particles of 5 to 60 nm in grain diameter and Nano Rods with diameter of 6 to 11 nm and length of 90 to 450. The mirror face diascoptic lighting intensity is obviously weakened while the diffuse transmission light intensity is increased in the infrared band and near infrared band of 600 to 900. The first layer is 50 to 15 nm in thickness while the second layer is 2 to 12 micron in thickness. The dye sensitize solar battery is characterized in high light scattering property, simple preparation method and easy operation.

A reflection type projecting screen includes a diffuse plate having a diffuse transmission surface for converting at least transmission light into diffused light and a corner cube array for reflecting the light passing through the diffuse plate to a position which is approximately similar to a passing position of the diffuse transmission surface. The diffuse plate and the corner cube array are positioned in an order of the diffuse plate and the corner cube array. The reflection screen is capable of improving utilization efficiency of light and simplifying the structure while reducing the effect of outside light. Furthermore, there are provided a front projector system and a multi-vision projector system each of which has a projector for projecting the projection light and a reflection screen for reflecting the projection light as diffused light having directivity in at least one predetermined direction, in accordance with the incident direction of the projection light.

A light source unit includes an excitation light source and a luminescent wheel on which luminescent light emitting areas including, on a reflecting surface, red and green luminescent materials which respectively emit light of red and green wavelength band, when receiving excitation light, and a diffuse transmission area which diffuses and transmits excitation light, are aligned end to end in a circumferential direction. An excitation light incident surface of a luminescent material layer of the luminescent wheel has a surface with a plurality of projecting bodies. Regular quadrangular pyramids are arranged thereon in a matrix with outer boundaries of bottom portions of adjacent regular quadrangular pyramids contacting each other. The pyramids rise at a rising angle of at least 30°, and a length of one side of an outer boundary of the bottom portion of the pyramid is between 10 and 100 μm.

A device and a method for laser rangefinder receiving field-of-view calibration and optical axis parallelism measurement are provided. The invention relates to a device and method for laser rangefinder receiving center field-of-view calibration and field-of-view measurement. The device comprises a calibration light source, a beam shaping and precision adjusting component, a diffuse transmission plate, a power meter, a collimator, a laser ranging system to be tested, and an oscilloscope. The device and the method of the invention not only can be used to calibrate the field of view of a laser receiving center and measure the range of the receiving field of view, but also can be used to measure the parallelism between a transmitting optical axis and a receiving optical axis. The device and the method are mainly characterized in that calibration of the center field of view of a laser rangefinder, measurement of the field-of-view range and measurement of parallelism between the transmitting and receiving optical axes are realized by using an auxiliary calibration light source with high beam quality to produce simulated echo and scanning the receiving field of view.

The invention relates to a diffuse transmission spectrum and image information fusion method for detecting internal quality of honeydew melons on line and a device. The method comprises the following steps: establishing a honeydew melon internal quality nondestructive testing model and detecting the internal quality of a honeydew melon sample on line. The device comprises a conveying device, a signal control unit, a diffuse transmission spectrum acquisition device, a honeydew melon image acquisition device and a honeydew melon internal quality detection software system; drag rings for containing honeydew melons are arranged on the conveying device; each drag ring sequentially penetrates through an image acquisition chamber of the image acquisition device and a spectrum acquisition chamber of the diffuse transmission spectrum acquisition device; a layer sensor and two industrial cameras in the image acquisition chamber and a laser sensor and a near infrared spectrometer in the spectrum acquisition chamber are connected with a computer provided with the honeydew melon internal quality detection software system through the signal control unit. According to the method and the device, the internal quality of honeydew melons can be effectively detected, and the defect that internal quality indexes of the honeydew melons cannot be accurately detected through the image information is overcome.

A surface light source device 1 includes a base member 3 provided with a plurality of point-source lines, each of which has a plurality of point sources 11 arranged in a line, and a plurality of diffuse transmission members 14 for covering the point-source lines. Each of the diffuse transmission members 14 is located while keeping substantially equal distances from the respective point sources 11 at least in a direction perpendicular to each of the point-source lines. Consequently, it is possible to allow light fluxes emitted from the point sources 11 to be transmitted in diffusion through the diffusion transmission members 14.

The invention provides a quick near-infrared measuring device and method for milk ingredients and relates to the technical field of near-infrared spectroscopic analysis. The device comprises a constant current driving unit, an LED (Light Emitting Diode) component unit, a sample pool unit, a photoelectric detection unit, a signal processing and control unit, a man-machine interface unit, and the like. A diffuse transmission measuring mode is adopted, sample absorbance values of sixteen short-wave near-infrared absorbing wavelengths are utilized and a prediction model in the device is used, thereby simultaneously measuring the indexes in the milk, such as fat, protein, milk sugar, non-fat milk solid, total milk solid, water, and the like. The quick near-infrared measuring device has the advantages that sixteen short-wave near-infrared absorbing wavelengths are used for quickly measuring the main ingredients of milk, thereby being small in data volume, high in measuring speed and suitable for on-site application. The device is small in volume, low in power consumption, light in weight and convenient in carrying, thereby being capable of meeting the requirement for quickly on-site analyzing the main ingredients of a milk sample.

A method to produce surface enhanced Raman substrate (SERS) focalizes a laser beam with pulse width of 10 swung dash 500femtosecond, power of 1 swung dash 100milliwatt and peak power of 2 is multiplied by 10⁹ swung dash 5 is multiplied by 10¹²W to form a light spot with a diameter of several microns, thus projecting the focalized light spot of the femtosecond laser beam onto a silicon glass surface mixed with precious metals, synchronously scanning the focalized light spot and forming a silicon glass substrate with nanometer roughness precious metal grains on its surface. And then the substrate is positioned to silver nitrate or aurum chlorate for steeping to form a precious metal film layer with nanometer roughness and obtaining a SERS. Relevant experiments indicate that the SERS produced according to the present invention is provided with a remarkably enhanced surface Raman scattering effect.

Apparatus and a method are disclosed for the simultaneous or rapid sequential use of two or more different separations between the source and detector of the measuring apparatus to obtain spectral measurement data in diffuse transmission or “interaction” modes of collecting optical information from a specimen. The method and apparatus subsequently combine separate data taken from two or more different pathlengths to provide discrimination against undesired information while preserving or enhancing desired information. Additional reference information to normalize the optical signal is also provided. The optical and mechanical design of the optical probe also provides for transmittance, reflectance and interactance measurements on small amounts of specimen.

The invention discloses an on-line real-time detection device of optical parameters, color parameters and electrical parameters of a light emitting diode (LED) lamp. The device comprises a total lumen test part, an optical fiber spectrograph, a digital power meter, a computer, a test starting switch, a barcode printer matched with the computer, and mechanical parts, wherein the total lumen test part, the optical fiber spectrograph and the digital power meter are all connected with the computer through universal serial buses (USBs); the test starting switch is connected with the computer through a serial port; and the total lumen test part comprises a large-area solar battery, a luminosity function matching optical filter and a polytetrafluoroethylene diffuse transmission film. The on-line real-time detection device has the largest advantage that the large-area solar battery is adopted as the total lumen measuring part of the LED lamp, so the measuring device has the advantages of simple optical structure, simple and convenient manufacturing process, low cost and high practicality, can be applied to on-line detection of industrial production, can also be used as off-line detection equipment in a laboratory, and has wide popularization and application value.

A compact, and low maintenance back lit illuminated sign (10), especially such a back lit sign suitable for use on a vehicle. The shallow back lit illuminated sign (10) comprises a housing (12), a light source (30) suitable for supplying light to a light fiber (20), and at least one side-light emitting fiber (20). The housing (12) has a sign face (14) and an interior surface (16, 18) that includes a back surface (19). The sign face (14) has an illuminated area that diffusely transmits light. The back surface (19) is located at a depth from the sign face (14). One or more side-light emitting fibers (20) are connected so as to receive light from the light source (30) and are mounted within the housing (12) so as to limit the amount of emitted light, from the fiber(s) (20), that travels directly to the sign face (14).

A vacuum ultraviolet hemisphere reflectivity testing device belongs to the field of vacuum ultraviolet spectrum transmission testing and comprises a deuterium lamp light source, a toroid mirror, a Seya-Namioka monochrometer, an alignment reflector, a photochopper, a fluorescent integrating sphere coated with a fluorescent conversion film on the inner wall, a sample, a diffuse transmission light filter, a detector, an accurate rotary table, a wavelength driving mechanism, a data collection system, a computer and a vacuum tank. All optical elements of the testing device are of reflection structures, a light division system adopts the Seya-Namioka monochrometer, a IV type phase difference elimination concave face grating with large numerical is adopted at a light division element of the monochrometer, and efficient transmission of vacuum ultraviolet spectrum energy is guaranteed. A receiving system of the detector adopts the scheme of the fluorescent integrating sphere, thereby avoiding excess energy loss after vacuum ultraviolet beams are reflected mangy times on the inner wall of the integrating sphere. By means of two working models (sample/reference), absolute measurement of the vacuum ultraviolet hemisphere reflectivity is achieved.

The invention discloses an optical three-dimensional correlation identification device based on an integrated imaging system and an identification method. The device comprises a three-dimensional information acquisition device and a correlation identification system, wherein the three-dimensional information acquisition device comprises a sample rotation device, an optical microscope, a diffuse transmission element, a micro lens array, an imaging lens and a computer, the correlation identification system comprises a laser device, a first reflective mirror, a second reflective mirror, a reverse telescope system, a spatial light modulator, a first Fourier light transmission mirror, a third reflective mirror, a diaphragm, a light refractive crystal, a second Fourier light transmission mirror, a second CCD sensor and a spatial light modulator. The device has advantages of good amplification capability, high imaging quality, comprehensive three-dimensional information and excellent identification effect.

The present invention is directed to an apparatus and method for measuring the haze value of transmissive samples. The apparatus comprises a first light source selectively configurable to emit a first light beam, a second light source selectively configurable to emit a second light beam, an integrating sphere having an outer surface and an inner surface, the inner surface configured to reflect light incident upon the inner surface, the inner surface further enclosing an interior volume. The integrating sphere is further equipped with an exit port configured to emit light from the interior volume of the integrating sphere. The exit port is positioned such that light from the first light source exits the integrating sphere without obstruction, and light from the second light source is diffused on the interior surface of the integrating sphere prior to exiting the exit port. A light detector is also included and is configured to generate a light-intensity signal when light exiting the integrating sphere has passed through a sample and is incident on the light detector. The apparatus further includes a processor configured to receive the light-intensity signal and generate an output signal to a user indicating the haze value. The present invention is also directed to a method of calculating the haze value of a sample using a stored calibration value, a diffuse transmission value (sample-absent diffuse light-intensity value), a direct transmission value (sample-absent direct light-intensity value), a measured diffuse transmission value (sample-present diffuse light-intensity value) and a measured direct transmission value (sample-present direct light-intensity value).

The invention provides a monochrome full-parallax holographic three-dimensional one-step printer light path structure. A system assembly comprises a coherent laser light source, a mechanical translational control shift system, an optical lens, a diffuse transmission plate, a holographic recording material, a shutter, a spatial light modulator (SLM) and the like. The structure is characterized in that the SLM modulates object light; the object light after modulation is uniformly irradiated on the diffuse transmission plate in front of a holographic plate; another beam of reference light is transmitted to a control position of a mechanical system which can move along an x axis and a y axis on a scanning lens focal plane via an optical fiber; after being emitted, the reference light is interfered with the object light on the holographic plate so as to complete one holographic pixel recording process; then, a computer translation system and the SLM are used to carry out control and a next holographic pixel is exposed till that all the pixels are exposed. Under the condition that imaging quality is guaranteed, the structure has the following advantages that 1 there is no distortion display in a 3D image; 2 a whole process is full-automatic and intelligent; 3 a finished product possesses a three-dimensional stereoscopic effect and is easy to carry and observe.

The invention relates to an ultraviolet optical instrument resolution tester, wherein, a deuterium lamp source forms an image on an incidence slit group mechanism of an ultraviolet monochromator by a mechanical iris aperture and a quartz condensing-lens by the ratio of 1:1, ultraviolet light emitted by an exit slit of the ultraviolet monochromator evenly irradiates an ultraviolet diffuse transmission instrument which is tightly pressed together with an ultraviolet resolution plate by a fixture and is fixed on a two-dimensional adjusting platform behind the exit slit, through the diffuse transmission effect of the ultraviolet diffuse transmission instrument, part of the ultraviolet resolution plate is evenly illuminated and the ultraviolet resolution plate forms an infinite ultraviolet resolution target by a flat reflector and an aspheric collimator mirror; an optical instrument platform to be measured is placed on an optical guide rail with axis coinciding with an optical axis of a parallel light path. The tester adopts an aspheric surface to design a reflective collimator, and forms the infinite ultraviolet resolution target. The tester not only reduces costs of design and process, but also makes the best use of ultraviolet energy.

There is provided a surface light-emitting device capable of preventing an increase in power consumption even if the length of the light-emitting surface of the surface light-emitting device is greater than the width, and capable of emitting light uniformly without decreasing the brightness of the light-emitting surface nor increasing the height of the light guiding space. In the present surface light-emitting device, the incident plane (201) is one of two sides of the light guiding space (20) in opposition in the longitudinal direction. The light-transmitting plate (4) includes a diffusion filter (6) which covers a specific area of the surface of the light-transmitting plate (4) near the light source (3). The remaining area of the surface of the light-transmitting plate at a distance from the light source (3) is not covered with the diffusion filter (6). The diffusion filter (6) is formed of a laminate in which a plurality of diffuse transmission films are layered. The number of diffuse transmission film (6) layers is highest in the area closest to the light source (3) so that the light transmittance is increased as the distance from the light source (3) increases due to a decrease in the diffusion of light, and the number is gradually decreased as the distance from the light source (3) increases.

The present invention discloses a dispersion module and a backlight module containing the dispersion module. A light source is arranged at one side of the dispersion module, and the light source comprises a first light source, a second light source, and a third light source. The second light source is positioned on a first direction of the first light source, a first space is defined between the first and the second light sources; the third light source is positioned on a second direction of the first light source, a second space is defined between the third light source and the first light source; wherein the first space is less than the second space, and the first direction is different from the second direction. The dispersion module includes a plurality of dispersion components, which parallel to the first and the second directions to form respectively a first linear array compaction and a second linear array compaction, the first linear array compaction is less than the second linear array compaction. Therefore light produced by the backlight module projects evenly on a display panel without happening the uneven distributing of brightness and darkness by adopting the present invention.

The invention discloses a watermelon sugar degree rapid modeling method based on secondary spectrum recombination. The method comprises the following steps: collecting diffuse transmission spectrums of a watermelon, and selecting spectrums of J wavelengths within a high-signal-noise-ratio spectrum range; measuring sugar degree values of the watermelon; adopting a uniformly-spaced extraction spectrum method or a uniformly-spaced average spectrum method to reconstruct new spectrum matrixes, arranging uniformly-spaced points j, enabling j to be no smaller than 1 and no larger than J/2 and be a positive integer, reconstructing the spectrums of J wavelengths, making comparisons of modeling effects of the new spectrum matrixes, and performing self-adaption optimization of the new spectrum matrixes with the correlation coefficient to be over 0.8; performing spectrum pretreatment on the new spectrum matrixes with the correlation coefficient to be over 0.8; and using diffuse transmission spectrums screened out and the sugar degree values of the watermelon to build a prediction model of the watermelon sugar degree, and achieving on-line detection of the watermelon sugar degree. The watermelon sugar degree rapid modeling method can also be used for detection research of internal quality of other fruits such as sugar degree, acidity and hardness.