Abstract: An image focus alignment structure includes a base, a lens barrel, a first sealant layer and a second sealant layer. The base has a first installation portion and a second installation portion. The lens barrel is disposed on the base. The first sealant layer is for fixing a partial barrel body of the lens barrel on the first installation portion. The second sealant layer is for fixing another partial barrel body of the lens barrel on the second installation portion.

Abstract: The prevent invention provides a lens focusing apparatus. The lens focusing apparatus comprises a lens holding module for clamping at least one lens to be tested, a chart display module and a focal length shortening module. The chart display module includes a frame assembly, a first chart display and a plurality of second chart displays disposed on the frame assembly. Each second chart display is inclined at a first predetermined angle relative to the first chart display. The focal length shortening module includes a first focal length shortening device and a plurality of second focal length shortening devices. The first focal length shortening device is disposed between the at least one lens and the first chart display, and each second focal length shortening device is disposed between the at least one lens and the corresponding second chart display.

Abstract: A lens assembly including a lens module, a housing, a first adhesive, and a circuit board module is provided. The lens module has a top portion and a stand extending out of the top portion and passing through the housing, so that the stand is assembled to the circuit board module. The top portion is connected to an upper side of the housing. The housing is located between the top portion and the circuit board module. The stand, the housing, and the circuit board module are fixed together by the first adhesive. A manufacturing method of the lens assembly is also provided.

Abstract: A lens focusing device includes a lens holding module for clamping at least one test lens to be tested, a replaceable chart display module, and a focal length shortening module. The replaceable chart display module includes a frame structure, a first chart display element detachably disposed on the frame structure, and a plurality of second chart display elements detachably disposed on the frame structure, and each second chart display element is inclined at a predetermined angle relative to the first chart display element. The focal length shortening module includes a first focal length shortening structure and a plurality of second focal length shortening structures. The first focal length shortening structure is disposed between the at least one test lens and the first chart display element, and each second focal length shortening structure is disposed between the at least one test lens and the corresponding second chart display element.

Abstract: The prevent invention provides a lens focusing apparatus. The lens focusing apparatus comprises a lens holding module for clamping at least one lens to be tested, a chart display module and a focal length shortening module. The chart display module includes a frame assembly, a first chart display and a plurality of second chart displays disposed on the frame assembly. Each second chart display is inclined at a first predetermined angle relative to the first chart display. The focal length shortening module includes a first focal length shortening device and a plurality of second focal length shortening devices. The first focal length shortening device is disposed between the at least one lens and the first chart display, and each second focal length shortening device is disposed between the at least one lens and the corresponding second chart display.

Abstract: A lens focusing device includes a lens holding module for clamping at least one test lens to be tested, a replaceable chart display module, and a focal length shortening module. The replaceable chart display module includes a frame structure, a first chart display element detachably disposed on the frame structure, and a plurality of second chart display elements detachably disposed on the frame structure, and each second chart display element is inclined at a predetermined angle relative to the first chart display element. The focal length shortening module includes a first focal length shortening structure and a plurality of second focal length shortening structures. The first focal length shortening structure is disposed between the at least one test lens and the first chart display element, and each second focal length shortening structure is disposed between the at least one test lens and the corresponding second chart display element.

Abstract: An image focus alignment structure includes a base, a lens barrel, a first sealant layer and a second sealant layer. The base has a first installation portion and a second installation portion. The lens barrel is disposed on the base. The first sealant layer is for fixing a partial barrel body of the lens barrel on the first installation portion. The second sealant layer is for fixing another partial barrel body of the lens barrel on the second installation portion.

Abstract: This invention discloses a process for the synthesis of a rubbery polymer by emulsion polymerization that comprised polymerizing (1) a conjugated diolefin monomer and (2) a functionalized monomer having the structural formula: wherein the R1 groups can be the same or different and represent hydrogen atoms or alkyl groups containing from 1 to about 8 carbon atoms, wherein R2 represents a hydrogen atom or an alkyl group containing from 1 to about 8 carbon atoms, wherein R3 represents a hydrogen atom or an alkyl group containing from 1 to about 8 carbon atoms, and wherein R4 represents a hydrogen atom or an alkyl group containing from 1 to about 8 carbon atoms, with the proviso that if R3 represent an alkyl group then R4 represents a hydrogen atom, and with the proviso that R4 represents an alkyl group then R3 represents a hydrogen atom, wherein said polymerization is conducted in an aqueous medium, and wherein said polymerization is initiated with a free radical initiator.

Abstract: The present invention is directed to a catalyst system for synthesizing rubbery polymers, such as polybutadiene rubber, styrene-butadiene rubber, isoprene-butadiene rubber, or styrene-isoprene-butadiene rubber, that are amine functionalized and have a high trans microstructure. The catalyst system, in one embodiment, includes (a) an organolithium amine compound, (b) a group IIa metal salt of an amino glycol or a glycol ether, (c) an organoaluminum compound, and optionally (d) an amine compound. The amine functionalized rubbery polymers can be utilized in tire tread rubbers where the rubbery polymers may provide desirable wear properties without substantially sacrificing other performance characteristic(s), e.g., traction properties.

Abstract: This invention relates to a precipitated silica reinforced conjugated diene-based elastomer composition containing an alkoxysilane coupled, in-chain functionalized, conjugated diene-based elastomer and to a tire having at least one component thereof. Said in-chain functionalized conjugated diene-based elastomer is a conjugated diene-based elastomer which contains a plurality of at least one of in-chain p- and m-(2-pyrrolidinoethyl) styrene (PES) and m-(2-pyrrolidino-1-methylethyl) alpha-methylstyrene (PAMS) groups.

Abstract: This invention discloses a process for making dilithium initiators in high purity. This process can be conducted in the absence of amines which is desirable since amines can act as modifiers for anionic polymerizations. The dilithium compounds made are highly desirable because they are soluble in aromatic solvents.

Abstract: A heterogeneous rubbery polymer is provided that includes a polymer chain derived from a vinyl aromatic monomer and a conjugated diolefin monomer, wherein from greater than 20 weight percent to about 40 weight percent of units in the rubbery polymer are derived from the vinyl aromatic monomer and from about 60 weight percent to about 80 weight percent of units in the rubbery polymer are derived from the conjugated diolefin monomer. The polymer chain is further characterized by having greater than zero and less than about 30 weight percent of the vinyl aromatic units in sequences containing 1 vinyl aromatic unit, from about 5 weight percent to about 20 weight percent of the vinyl aromatic units in sequences containing 5 to 8 vinyl aromatic units, and greater than zero and less than about 5 weight percent of the vinyl aromatic units in sequences containing 9 or more vinyl aromatic units.

Abstract: This invention discloses a process for synthesizing a dendrimer of a rubbery polymer comprising: (a) reacting a lithium terminated rubbery polymer with a halogenated tin containing compound to produce a polymer which is terminated with halogenated tin moieties, wherein the halogenated tin containing compound is of the structural formula: wherein X represents a halogen atom, wherein Z1 groups can be the same or different and are selected from alkyl groups containing from 1 to 8 carbon atoms, wherein x represents an integer from 1 to 20, wherein the molar ratio of the lithium terminated rubbery polymer to halogen atoms in the halogenated tin containing compound is within the range of 2:n to (n?1):n, wherein n represents the number of halogen atoms that are bonded directly to tin atoms in the halogenated tin containing compound; (b) reacting the polymer which is terminated with halogenated tin moieties with a molar excess of a tertiary alcohol to produce a polymer which is terminated with hydroxy tin moietie

Abstract: This invention discloses a process for synthesizing a dendrimer of a rubbery polymer comprising: (a) reacting a lithium terminated rubbery polymer with a halogenated tin containing compound to produce a polymer which is terminated with halogenated tin moieties, wherein the halogenated tin containing compound is of the structural formula: wherein X represents a halogen atom, wherein Z1 groups can be the same or different and are selected from alkyl groups containing from 1 to 8 carbon atoms, wherein x represents an integer from 1 to 20, wherein the molar ratio of the lithium terminated rubbery polymer to halogen atoms in the halogenated tin containing compound is within the range of 2:n to (n?1):n, wherein n represents the number of halogen atoms that are bonded directly to tin atoms in the halogenated tin containing compound; (b) reacting the polymer which is terminated with halogenated tin moieties with a molar excess of a tertiary alcohol to produce a polymer which is terminated with hydroxy tin moietie

Abstract: The present invention is directed to a catalyst system for synthesizing rubbery polymers, such as styrene-butadiene rubber, that can be utilized in tire tread rubbers. The catalyst system, in one embodiment, includes an organolithium compound and a potassium alkyl borohydride or potassium alkyl aluminum hydride defined by: (R)3A?(H)K+, wherein A is boron or aluminum, H is hydrogen, K is potassium, and R, which is the same or different, is either H, a C1-C10 alkyl, a C3-C10 cycloalkyl, phenyl, or phenyl substituted C1-C10 alkyl, or a C3-C10 cycloalkyl, with the proviso that at least one R is a C1-C10 alkyl, and further wherein any two R's may optionally be part of a carbocyclic ring. The rubbery polymers can have low to medium vinyl microstructure content, i.e., from about 10% to about 40%, and are useful in tire tread rubber compounds which can exhibit improved wear and tear characteristics.

Abstract: The present invention is directed to a catalyst system for synthesizing rubbery polymers, such as polybutadiene rubber, styrene-butadiene rubber, isoprene-butadiene rubber, or styrene-isoprene-butadiene rubber, that are amine functionalized and have a high trans or high vinyl microstructure. The catalyst system, in one embodiment, includes an organolithium amine compound, and one or more of (a) a group IIa metal salt of an amino glycol or a glycol ether, (b) an organoaluminum compound, or (c) an amine compound. The amine functionalized rubbery polymers can be utilized in tire tread rubbers where the rubbery polymers may provide desirable wear properties without substantially sacrificing other performance characteristic(s), e.g., traction properties.

Abstract: This invention discloses a process for synthesizing a dendrimer of a rubbery polymer comprising: (a) reacting a lithium terminated rubbery polymer with a halogenated silicon containing compound to produce a polymer which is terminated with halogenated silicon moieties, wherein the halogenated silicon contain compound has at least four halogen atoms which are bonded directly to silicon atoms, wherein the ratio of the lithium terminated rubbery polymer to halogen atoms in the halogenated silicon containing compound is within the range of 2:n to (n-1):n, wherein n represents the number of halogen atoms that are bonded directly to silicon atoms in the halogenated silicon containing compound, wherein the halogenated silicon containing compound contains at least three halogen atoms which are bonded directly to a silicon atom; (b) reacting the polymer which is terminated with halogenated silicon moieties with a molar excess of a tertiary alcohol to produce a polymer which is terminated with hydroxy silyl moieties; a

Abstract: A heterogeneous rubbery polymer is provided that includes a polymer chain derived from a vinyl aromatic monomer and a conjugated diolefin monomer, wherein from greater than 20 weight percent to about 40 weight percent of units in the rubbery polymer are derived from the vinyl aromatic monomer and from about 60 weight percent to about 80 weight percent of units in the rubbery polymer are derived from the conjugated diolefin monomer. The polymer chain is further characterized by having greater than zero and less than about 30 weight percent of the vinyl aromatic units in sequences containing 1 vinyl aromatic unit, from about 5 weight percent to about 20 weight percent of the vinyl aromatic units in sequences containing 5 to 8 vinyl aromatic units, and greater than zero and less than about 5 weight percent of the vinyl aromatic units in sequences containing 9 or more vinyl aromatic units.

Abstract: Rubbery polymers can be formed having the general formula: R1R2N—(CH2)n—X—CH2—CHR3R4 wherein R1 and R2 are independently selected from a group consisting of alkyls, cycloalkyls, alkenyls, cycloalkenyls, aryls, phenyls, heterocycles, acyls, and silanes, or R1 in combination with R2 forms a heterocyclic ring; n is an integer from 1 to 20; X is selected from a group consisting of sulfur, a phosphorus moiety, and a silicon moiety; R3 and R4 are one of hydrogen, alkyls, alkenyls, and at least one of which includes reactive unsaturation such as an alkenyl group. Moreover, this invention discloses a process of making functionalized rubbery polymers from the functionalized monomers.

Abstract: This invention discloses a process for making dilithium initiators in high purity. This process can be conducted in the absence of amines which is desirable since amines can act as modifiers for anionic polymerizations. The dilithium compounds made are highly desirable because they are soluble in aromatic solvents.