122 results about "Opacity" patented technology

A method of making an at least one hole in an optically transparent body comprises the following steps: (i) providing an ultrashort pulse laser for producing a laser output with a wavelength λ, the laser output having a subpicosecond laser pulse duration; (ii) providing a laser output focusing lens for focusing the laser output, the focusing lens having a numerical aperture NA; (iii) providing an optically transparent body, the optically transparent body having a transparency at λ of at least 90%/cm; (iv) providing a liquid filled container situated proximate to the optically transparent body, such that the optically transparent body is in direct contact with the liquid; and (v) directing the laser output through the focusing lens to produce a focused laser output with a subpicosecond laser pulse duration proximate the optically transparent body, wherein the focused laser output traces at least one hole track pattern through the transparent glass body while the optically transparent body and said focused laser output move relative to one another in X-Y-Z directions. The at least one hole track pattern is in contact with the liquid and the focused laser output, in conjunction with the liquid, creates at least one hole in the optically transparent body.

In an image processing method for generating a pseudo three-dimensional image by a volume rendering method in which a pixel value of each pixel on a projection plane on which a three-dimensional image illuminated by an arbitrary light source is projected is determined using a brightness value at each examination point, which is a point on the three-dimensional image sampled along each of a plurality of visual lines connecting an arbitrary viewpoint and each pixel on the projection plane, an illuminance level at each examination point is calculated based on an opacity level at each calculation point, which is a point on the three-dimensional image sampled along each of a plurality of light rays connecting the light source and each examination point, and the brightness value at each examination point is determined based on the calculated illuminance level.

An aircraft passenger seat privacy partition including a screen selectively switchable between an opaque optical state and a substantially transparent optical state in response to a change in voltage applied to the screen, and a touch-responsive switch embedded in the screen for detecting a change in capacitance in the screen and applying the voltage change to the screen to selectively switch between the opaque and substantially transparent optical states.

The invention provides a polycarbonate combination with high light reflectivity, which comprises 63 to 90 shares of polycarbonate (PC), 3 to 6 shares of bromide polycarbonate, 2 to 5 shares of Acrylic Acid Core-Shell Copolymer, 5 to 25 shares of TiO2, 0.1 to 0.3 shares of antioxidant, 0.2 to 0.4 shares of lubricant and 0.3 to 0.5 shares PTFE fine powder. The combination has the advantages of anti-flaming, high light reflectivity, high temperature resistant, easy modeling and good opacity and can be used for producing the spare parts for electronic electric appliances such as the LED display, the LCD display, etc.

The present invention provides a material for photoelectric conversion elements for use in imaging elements which comprises a compound represented by the following formula (1). The material for photoelectric conversion elements for use in imaging elements, which comprises a compound represented by the following formula (1), is used to produce a photoelectric conversion element which is excellent in terms of hole- or electron-leakage prevention, thermal resistance to processing temperatures, transparency to visible light, etc. (In formula (1), R₁ and R₂ each independently represent a substituted or unsubstituted aromatic group.)

The invention discloses a production process of a compound transparent holographic film, and belongs to the technical field of laser anti-counterfeit. The production process comprises the preparation of compound film coating liquid, the coating of the compound film coating liquid, the low-temperature film formation and UV pre-curing of the film coating liquid, the wired mold pressing and UV light full curing, and the rolling of the transparent holographic film; and the production process combines an information layer with a medium layer as a whole through the compound film coating liquid to form a compound coating layer, so that the prepared transparent holographic film has such characteristics as high refraction index, high transparency and signal-to-noise ratio, excellent wear and ageing resistance and obvious holographic image contrast, the technical bottlenecks of difficult tracking and difficult positioning due to small contrast in a traditional transparent holographic image are broken through, the random positioning of a transparent holographic pattern in a certificate is really achieved, and the comprehensive anti-fake effect of transparent hologram is enhanced.

The invention discloses a zero-dimensional Cs3Cu2I5 perovskite scintillation crystal and application thereof. The zero-dimensional Cs3Cu2I5 perovskite scintillation crystal is prepared through the steps that firstly, N, N-dimethylformamide and dimethyl sulfoxide are mixed evenly to prepare a mixed solution, cesium iodide and cuprous iodide are added into the mixed solution, stirring is conducted to prepare a supersaturated precursor solution, and finally crystal growth is conducted through an inverse temperature crystallization method after the supersaturated precursor solution is filtered. When the Cs4PbI6 perovskite crystal is prepared, the inverse temperature crystallization method is adopted, operation is easy, controllability is high, repeatability is good, and large-scale industrialproduction can be achieved; meanwhile, the crystal prepared by the method is good in transparency, good in stability, high in quantum luminous efficiency and high in responsivity, and can be used fornuclear radiation detection.

The invention discloses a noncontact automatic detection for detecting transparency of mixed liquid such as turbid liquid, emulsified liquid and the like. The noncontact automatic detection method comprises the steps of: generating one group of plane visible light and black light, and the plane visible light and the black light pass through the outer side of a transparent container and horizontally irradiates the mixed liquid to be mixed; the light penetrates through the mixed liquid to lose partial energy, the other part of light arrives at a photoelectric receiving device at the other opposite outer side of the transparent container and a photoelectric converter in the photoelectric receiving device generates a photovoltaic electric signal, the photovoltaic electric signal is processed through a circuit and a computing program, thus a numerical value of absorbing light energy of the mixed liquid to be measured can be obtained, thus the transparency of the mixed liquid is determined.

The invention discloses a preparation method of transparent glass with an intermediate infrared 3.9 mum luminescence characteristic at room temperature. The chemical composition of the glass substrateis (mol%) 26InF3-14ZnF2-19BaF2-11GaF3-8SrF2-12PbF2-5LiF-(4-x)LaF3-xHoF3-1NdF3 (x is equal to 0.2, 0.5, 1, 2, 3, 4, named as xHo-1Nd). The sum of the molar percentages of all the compounds is 100%. The preparation method comprises the following steps of 1) weighing each compound, and stirring and mixing in a mortar, 2) putting the mixture into a platinum crucible, and putting the platinum crucibleinto a 850 DEG C high-temperature furnace for heat preservation for 30 minutes, 3) after the solution glass is cooled, putting the solution glass into a glove box, heating the solution glass for 2 hours at 850 DEG C in an environment full of nitrogen, and pouring the solution glass onto a copper plate preheated at 240 DEG C, and 4) placing the sample in an annealing furnace for annealing treatment to eliminate stress in the glass, and cooling to room temperature after 3 h. The glass prepared by the method has the advantages of high transparency, high luminous efficiency, excellent chemical stability, simple preparation process, and realization of batch production, and can be used as a gain material of an intermediate infrared fiber laser.

It is a toner for optical fixing which contains a binder resin, a colorant, and an infrared light absorbent, and the infrared light absorbent has a coloring opacity of 20 or less, and of phthalocyanine compound and/or naphthalocyanine compound.

The invention discloses an anti-electromagnetic radiation ultrathin film, a device, a preparation method and application, and the ultrathin film is of a laminated structure and is sequentially provided with a first dielectric layer, a first metal layer, a second dielectric layer, a second metal layer and a third dielectric layer. The dielectric layer is made of a visible light band transparent dielectric material; the first dielectric layer and the third dielectric layer are the same in thickness and are both smaller than the second dielectric layer in thickness. The anti-electromagnetic radiation ultrathin film is high in transparency in a visible light band, and the transmittance in the visible light band is greater than 80%. An alternate film layer structure composed of metal and a medium is utilized, and multiple reflection of light waves in a multilayer film is utilized, so that enhanced transmission in a visible light wave band is realized. 1G-40GHz ultra-wideband electromagneticshielding can be realized, the shielding effect is good, and the electromagnetic shielding effect is superior to 50dB.

The invention discloses a production process of a transparent holographic film with high refractive index, and belongs to the technical field of laser anti-counterfeit. The process comprises the steps of preparation of film coating liquid with high refractive index, coating of the film coating liquid with high refractive index, low-temperature film formation and UV precuring of the film coating liquid, wired mold pressing, UV light complete curing and rolling of the transparent holographic film. The production process combines an information layer with a medium layer through the film coating liquid with high refractive index to form a composite coating layer, so that the prepared transparent holographic film has such characteristics as high refractive index, high transparency and signal-to-noise ratio, excellent wear resistance and ageing resistance and obvious holographic image contrast, the technical bottlenecks of difficult tracking and difficult positioning caused by small contrast in traditional transparent holographic images are broken through, the random positioning of the transparent holographic images in certificates is truly realized, and the transparent holographic comprehensive anti-counterfeiting effect is promoted.

The invention discloses inorganic non-linear optical crystal sodium iodobismuthate, and preparation and application thereof. The chemical formula of the inorganic matter is NaBi(IO3)4, the molecular weight is 931.57, the inorganic matter belongs to a monoclinic system, the crystal space group is Cc, and the cell parameters are as shown in the description; the compound can be obtained through a hydrothermal synthesis method at the temperature of 210 to 250 DEG C, the operation is simple, and the experiment condition is mild; the crystal of the inorganic compound has a relatively high second-order nonlinear optical effect, and phase matching can be realized; and the compound has relatively high transparency in visible-near-infrared light zones and medium-infrared light zones, has relativelylarge band gaps and relatively high thermal stability, and can be used as a nonlinear optical crystal material which can be widely applied to the fields such as optics.

The invention relates to an opacity control method, an opacity control device, AR/MR equipment, a controller and a medium. The opacity control method comprises the following steps: acquiring current light intensity and eye state characteristic parameters of a wearer; inputting the current light intensity and the eye state characteristic parameters of the wearer into a pre-trained opacity regression model, and outputting an equipment parameter target value; and adjusting the corresponding equipment parameter based on the equipment parameter target value so as to adjust the opacity of the AR/MRequipment. According to the most natural state and reaction of the eyes of the user, the opacity of the AR/MR equipment is adaptively adjusted based on the opacity regression model, and the user experience is improved.

The invention discloses a light field multi-plane representation reconstruction method and device based on a neural network, and the method comprises the following steps: generating a light field dataset through employing a scene of an open source code SceneNet; training an MPI reconstruction network according to the light field data set, performing sparse light field acquisition on the dynamic scene by using the camera array, and reconstructing an MPI for each viewpoint of a camera of the camera array by using the MPI reconstruction network; and filtering the alpha channel and the color vector of the reconstructed MPI in a time domain to form a target viewpoint MPI, selecting a target viewpoint MPI of a neighbor viewpoint for MPI fusion of a new viewpoint to be reconstructed, and generating a reconstructed image under the new viewpoint according to a rendering method of mixing transparency from front to back. According to the method, the system complexity can be greatly reduced, anda better light field interpolation effect can be realized in a space domain and an angle domain at the same time.

The invention discloses a high-transparency diffuse reflection metasurface based on a regular hexagon arrangement circular ring mesh. The technical problem that in the prior art, diffuse reflection metasurface transparency is low is solved. The metasurface comprises a transparent dielectric plate and M*N periodically arranged coding units printed on the upper surface of the transparent dielectricplate, the lower surface of the transparent dielectric plate is printed with a mesh composed of a plurality of circular ring patches, which are arranged in a regular hexagon manner and stacked in thewidth direction; each coding unit comprises K*K first coding subunits and second coding subunits, which are periodically arranged; the two coding subunits adopt a circular mesh structure consisting ofa plurality of circular ring patches, which are arranged in a regular hexagon manner and stacked in the width direction; rectangular notches with the same width and different depths are etched in theintersection positions of two orthogonal diameters and the circumference of the circular mesh structure, the number and the positions of the two coding subunits are determined through the optimal coding sequence, and the size is determined by the phase difference of 180 +/-30 degrees in the reflection characteristic.

Described herein are methods for fabricating a plurality of optoelectronic devices, and the optoelectronic devices resulting from such methods. One such method includes performing through silicon via (TSV) processing on a wafer, which includes a plurality of light detector sensor regions, to thereby form a plurality of vias, and then tenting and plating the vias and performing wafer back metallization. Thereafter, plurality of light source dies are attached to a top surface of the wafer, and a light transmissive material is then molded to encapsulate the light detector sensor regions and the light sensor dies therein. Additionally, opaque barriers including opaque optical crosstalk barriers are fabricated. Further, solder balls or other electrical connectors are attached to the bottom of the wafer. The wafer is eventually diced to separate the wafer into a plurality of optoelectronic devices.

A wearable display apparatus has an image generator that is energizable to form a 2D image; a partially transmissive mirror having a curved reflective surface; a beam splitter disposed to reflect light toward the curved mirror surface; and an optical image relay that is configured to relay the formed 2D image at the image generator to a curved focal surface of the partially transmissive mirror, wherein the curved focal surface is defined between the curved reflective surface of the partially transmissive mirror and the beam splitter, wherein the relay, curved mirror, and beam splitter are configured to form an exit pupil for viewing the generated 2D image as an optical virtual image; and a spatial light modulator configured with addressable array of pixels for selectively changing opacity for visible light from the object field according to dimensions of the generated 2D image.

The invention relates to a light sheet illumination imaging device, which comprises a first achromatic lens, a second achromatic lens, a semi-cylinder lens, a reflecting mirror, a third achromatic lens, a micro lens group, an illumination objective lens, a sample table, an imaging objective lens and an imaging lens from the object side to the image side, wherein the first achromatic lens, the second achromatic lens, the semi-cylinder lens and the reflecting mirror are positioned on the same optical axis; the reflecting mirror, the third achromatic lens, the micro lens group, the illumination objective lens and the sample table are positioned on the same optical axis; the sample table, the imaging objective lens and the imaging lens are positioned on the same optical axis. The light sheet illumination imaging device has the advantages that through the combination and matching effect of one micro lens group and other components, the illumination light sheet can still form limited sheet layer light illumination in the illumination direction; parallel light can be changed into non-parallel crossed light; after the light passes through the illumination objective lens, the formed shade regions are blocked and absorbed in each direction of structures with low transparency in the sample on the sample table, so that shade formed by blocking and absorption can be eliminated.