6results about How to "Improve facial shape" patented technology

This application discloses a fixed-focus lens, characterized in that it comprises, sequentially from the object side to the image side along the optical axis: a first lens with negative optical power, wherein its object side is convex and its image side is concave; a second lens, wherein its object side is concave and its image side is convex; a third lens with negative optical power, wherein its object side is concave and its image side is convex; a fourth lens with positive optical power, wherein its object side is convex and its image side is concave; a fifth lens with positive optical power, wherein its object side is convex and its image side is convex; a sixth lens with positive optical power, wherein its object side is convex and its image side is convex; a seventh lens with negative optical power, wherein its object side is concave and its image side is concave; an eighth lens with positive optical power, wherein its object side is convex and its image side is convex; a ninth lens, wherein its object side is concave and its image side is convex; and a tenth lens, wherein its object side is convex and its image side is concave; the fixed-focus lens comprises ten lenses with optical power.

The invention relates to a manufacturing method of a multi-region reflector with adjustable optical performance. According to the manufacturing method, a multi-region windowing reflector product with adjustable optical performance is obtained through the procedures of base material cleaning, AR plating on an A surface, AR plating on a B surface, peelable glue printing on the A surface, peelable glue printing on the B surface, cleaning, HR plating on the A surface, BL plating on the B surface, glue removing cleaning, laser cutting and the like. Compared with the prior art, the invention has the advantages of abundant product functions, stable performance, high surface quality and the like.

The invention discloses a free type wandering star wheel capable of improving the grinding and polishing surface type of a square piece, relates to the technical field of grinding and polishing, and can solve the problem that the machining error is large in the grinding and polishing process of an existing quartz crystal square piece. The free type wandering star wheel capable of improving the grinding and polishing surface type of the square piece comprises a circular outer gear ring, a circular inner gear ring and a grinding disc body and further comprises a plurality of loose pulley structures which are the same in structure and used for containing the square piece, and the diameter size of each loose pulley structure is smaller than the radius difference between the outer gear ring and the inner gear ring; the loose pulley structure is laid on the grinding disc body in a free state and located between the outer gear ring and the inner gear ring. The loose pulley structure is driven by the outer gear ring or the inner gear ring to rotate on the millstone body.

The invention provides a preparation method of a polycrystalline diamond grinding fluid for a silicon carbide substrate DMP. The polycrystalline diamond grinding fluid comprises the following components: pretreated polycrystalline diamond particles, an alcohol-based system, a polymeric dispersant, a stabilizer, a lubricant, a pH regulator, an antibacterial agent, a microemulsion forming agent and deionized water. The development of the grinding fluid is different from the traditional grinding of a copper disc matched with a polycrystalline grinding material, the polycrystalline matched with a polyurethane grinding pad has better surface effect and grinding rate, the surface roughness Ra can reach 1-2nm, the submerging rate can reach 0.15-0.25 mu m / min, and a surface damage layer is relatively small; an alcohol-based system is adopted in the system and comprises but is not limited to one or a mixed solution of more of ethylene glycol, glycerol, ethanol and triethylene glycol; and the polymeric dispersant suitable for an alcohol system is added, so that the dispersity of the particles is ensured while the speed is ensured, and scratches caused by soft agglomeration among the particles are avoided.

The invention provides a preparation method of an oral three-dimensional occlusion induction type high-angle bone face type appliance, which comprises the following steps: acquiring upper and lower jaw dentition digital models of a child patient, constructing upper and lower jaw tooth digital models of the child patient after occlusion reconstruction of the upper and lower jaws, and then designing a back tooth occlusion relation and a maximum occlusion contact mode after occlusion reconstruction, a design scheme of the invisible tooth socket containing the gap part is obtained, and a design scheme of the flexible filler is constructed. The invisible tooth socket containing the gap part prepared according to the design scheme can be independently used and can also be matched with flexible filler for use. The orthodontic appliance can solve the technical problem that the existing orthodontic appliance is difficult to simultaneously and effectively control the perpendicularity and inclination of front and rear teeth, adjust occlusion induction and tooth uniformity and adjust the inclination of an occlusion plane during deciduous tooth shedding and permanent tooth eruption of a child patient.

The present application provides a polishing liquid, which comprises abrasive and oxidizing agent; the oxidizing agent comprises the following raw materials: vanadium compound solution 0.1-35wt%; pH value regulator 0.001%-10wt%; flocculating agent 0.001%-10wt%; humectant 0.001%-15wt%; salt 0.001%-8wt%; water balance. The present application can polish the carbon face and silicon face of silicon carbide by the selection of vanadium compound solution, the cooperation of the rest auxiliary agents and the use of abrasive in the polishing liquid, and ensures the removal rate under the condition of less than 0.1 nanometer surface roughness.