33results about How to "Good optical structure" patented technology

A structure of an optical path for laser range finding includes a main body and a light-emitting unit assembled in the main body. The main body has a transmitting channel, a receiving channel and a calibration channel. The light-emitting unit is assembled in the transmitting channel. The light-emitting unit emits an external optical beam and an internal optical beam. The external optical beam is emitted through the transmitting channel. The internal optical beam is emitted to the receiving channel via the calibration channel. An included angle is defined between the external optical beam and the internal optical beam. A receiver is mounted in the receiving channel. Under this arrangement, the external optical beam and the internal optical beam do not interfere with each other.

The present invention relates to a high scattering smectic liquid crystal material and display device using the same. In the present invention, a series of smectic A phase liquid crystals having compact arrangement of crystal domains or a series of smectic liquid crystal mixed materials having a degree of order higher than that of the smectic A phase and an optical texture different from that of the smectic A phase are obtained by mixing a smectic liquid crystal with an organic compound having a high optical anisotropy (Δn) or mixing different types of smectic phases. When used in a smectic stable state liquid crystal display pattern, these materials have high scattering properties and can effectively improve the contrast of a smectic liquid crystal display device. The present invention also improves contrast when it used in a reflective smectic liquid crystal display device.

The invention provides a method for preparing petroleum-based mesophase pitch with uniform and high mesophase content. In the method, the FCC oil slurry of naphthenic or intermediate-based crude oil is used as a raw material, and under the action of a catalyst, the halogenated alkanes are mixed with the raw materials, and the temperature is raised. to 280-350° C., under a pressure of 0-2 MPa, and react for 5-20 hours to obtain modified oil. Take the distillate oil of the modified oil above 400°C, mix the distillate oil with the co-carbonizing agent, and react for 2-10 hours at 360-480°C, with a reaction pressure of 4-10 MPa, to obtain high-quality mesophase pitch. The technological process of the invention is simple and easy to operate, and the prepared mesophase pitch has uniform anisotropic structure, high mesophase content (>96%), low softening point (240-260 DEG C), and good spinnability.

The present invention relates to an optical structure for producing a decorative lighting effect in a lighting device, and a lighting device comprising at least one of the optical structure, wherein the optical structure comprises an optical element formed in one piece and comprising at least one opening; and an LED-filament comprising a substrate and a plurality of light sources arranged on the substrate, the substrate being at least partly made of a flexible material; wherein the at least one opening is adapted to receive the LED-filament such that a portion of the LED-filament extends through and is at least partly enclosed by a surrounding wall of the at least one opening such that the LED-filament is guided by and held in place by means of the at least one opening of the optical element and wherein light emitted from the LED-filament interacts with the optical element.

The invention discloses a light-emitting device, the light-emitting device includes a package substrate, has a first surface and a second surface opposite, a patterned conductive layer is arranged on the first surface, and the patterned conductive layer passes through a spacer at least Divided into two first and second regions that are electrically isolated from each other; LED chips, mounted on the patterned conductive layer, have opposite upper surfaces, lower surfaces, and sidewalls, and the lower surface is provided with a first electrode and the second electrode, wherein the first electrode is electrically connected to the first region, and the second electrode is electrically connected to the second region; the encapsulation layer covers the LED chip and the first surface of the substrate, and the encapsulation layer is in The thickness directly above the LED chip is greater than or equal to 0.5 times the thickness of the LED chip and less than or equal to 1.2 times the thickness of the LED chip.

The invention discloses an optomechanical microcavity structure containing a nonlinear mechanical oscillator, a measurement system and a method, and belongs to the field of micro-nano optoelectronic microcavity sensing. In the optomechanical microcavity composed of two one-dimensional photonic crystal micro-nanobeams, the movable micro-nanobeams are designed in a nonlinear mechanical oscillator, and the microdisk microcavity is used to monitor the movement of the microprobes to realize non-linear The displacement of the linear mechanical oscillator is measured to realize the experimental research on the nonlinear optical-mechanical coupling characteristics of the optical force-driven cavity integrated on the all-optical chip; at the same time, a coupling method based on two-way micro-nano fiber-optical microcavity is also designed Used to realize optical-mechanical coupled pumping and displacement detection simultaneously, the all-optical detection system can effectively observe nonlinear phenomena in optomechanical microcavity systems. For the first time, a design that introduces a nonlinear mechanical oscillator into an optomechanical microcavity is proposed, and at the same time, the observation of nonlinear phenomena under the action of optical-mechanical coupling is realized through experimental measurements.

The invention relates to the technical field of petroleum deep processing, and particularly relates to a preparation method of mesophase pitch. The preparation method comprises the following steps: uniformly mixing dimethylsulfoxide extract oil with hydrogen cracking tail oil at a mass ratio of dimethylsulfoxide extract oil to hydrogen cracking tail oil being 6:4-9:1, carbonizing for 10-25 h in a high-pressure autoclave at 430-480 DEG C, 12-18 MPa, in an inert gas atmosphere and stirring condition to obtain the mesophase pitch, wherein the dimethylsulfoxide extract oil is the dimethylsulfoxide extract oil of naphthene base crude oil vacuum gas oil, the hydrogen cracking tail oil is tail oil obtained through fixed bed hydrocracking or suspended bed hydrocracking of naphthene base crude oil vacuum residuum. The preparation method of mesophase pitch has the outstanding advantages as follows: the sources of raw materials are extensive and the cost is low; a hydrogenation solvent and a catalyst are not needed, the preparation process is simple; the prepared mesophase pitch is low in softening point, good in optical structure and high in mesophase content.

The invention discloses a preparation method and a preparation system of mesophase pitch. The preparation method includes the following contents: (1) the first raw material enters a first reaction unit after being heated, and the first reaction material stream is obtained after the reaction; (2) ) After the second raw material is heated and the first reaction stream enters the second reaction unit, the second reaction stream is obtained after the reaction; (3) The second reaction stream is rapidly cooled and then enters the third reaction unit to contact with the carrier gas for processing , oil and gas products and mesophase pitch are obtained after treatment. The preparation system includes a heating unit, a first reaction unit, a second reaction unit, a quenching device, a third reaction unit and a fractionation system. The preparation system of the mesophase pitch can operate stably for a long period, and the mesophase pitch obtained by the above preparation method has good quality controllability and high yield.