Abstract: An optical imaging system includes a first lens group including a reflective member and one or two lenses disposed in front of the reflective member; and a second lens group disposed behind the reflective member and including a plurality of lenses. The one or two lenses included in the first lens group have a positive refractive power overall, an image-side surface of a lens disposed closest to the reflective member among the one or two lenses included in the first lens group is concave, the reflective member includes an incident surface, a reflection surface, and an exit surface, and 0.25?D12P/DR?1.0 is satisfied, where D12P is a distance on an optical axis from the image-side surface of the lens disposed closest to the reflective member to the incident surface, and DR is a distance on the optical axis from the incident surface to the reflection surface.

Abstract: An optical imaging system includes a plurality of lenses disposed along an optical axis from an object side of the optical imaging system toward an imaging plane of the optical imaging system. The lenses are separated from each other by respective air gaps along the optical axis between the lenses. The lenses include a first lens closest to the object side of the optical imaging system. The conditional expressions 1.5 mm<Gmax, TL<12.0 mm, and 0.15<R1/f are satisfied, where Gmax is a maximum air gap along the optical axis among all of the air gaps, TL is a length of the optical imaging system along the optical axis from an object-side surface of the first lens to the imaging plane, R1 is a radius of curvature of the object-side surface of the first lens, and f is a focal length of the optical imaging system.

Abstract: An imaging lens system is provided. The imaging lens system includes a first lens having refractive power, a second lens having refractive power, a third lens having a convex object-side surface, a fourth lens having refractive power, a fifth lens having refractive power, and a sixth lens having refractive power. The first lens to the sixth lens are sequentially arranged from an object side toward an imaging plane. The imaging lens system satisfies the conditional expressions TTL/f<1.0 and 0.9<f1/f4<1.4, where TTL is a distance from an object-side surface of the first lens to the imaging plane, f is a focal length of the imaging lens system, f1 is a focal length of the first lens, and f4 is a focal length of the fourth lens.

Abstract: An imaging lens system includes a first lens group, an optical path conversion element, and a second lens group arranged in order from an object side. An optical axis of the second lens group is disposed eccentrically in a direction with respect to a geometric optical axis of the optical path conversion element.

Abstract: An optical imaging system is provided. The optical imaging system includes a first lens group including a first lens, a reflective member, and a second lens arranged in order from an object side to an imaging side; and a second lens group disposed behind the second lens and including a plurality of lenses, wherein the first lens has positive refractive power, and has a convex object-side surface and a concave image-side surface, and the first lens is spaced apart from the reflective member, and the second lens is bonded to the reflective member.

Abstract: One aspect of the present invention provides a stretching apparatus for manufacturing a separator including a first stretching machine and a second stretching machine arranged in parallel with each other, in which the first stretching machine includes a plurality of first unit sections having different stretching ratios, and the second stretching machine includes a plurality of second unit sections having different stretching ratios, the overall stretching ratio by each of the first stretching machine and the second stretching machine is the same each other, and at least one stretching ratio of the first unit section and at least one stretching ratio of the second unit section are different from each other and a method of manufacturing a separator using the same.

Abstract: An optical imaging system includes a plurality of lenses disposed along an optical axis from an object side of the optical imaging system toward an imaging plane of the optical imaging system. The lenses are separated from each other by respective air gaps along the optical axis between the lenses. The lenses include a first lens closest to the object side of the optical imaging system. The conditional expressions 1.5 mm<Gmax, TL<12.0 mm, and 0.15<R1/f are satisfied, where Gmax is a maximum air gap along the optical axis among all of the air gaps, TL is a length of the optical imaging system along the optical axis from an object-side surface of the first lens to the imaging plane, R1 is a radius of curvature of the object-side surface of the first lens, and f is a focal length of the optical imaging system.

Abstract: A camera module includes a lens module including a plurality of lenses having refractive power, a first optical path folding unit disposed on the object side of the lens module and configured to refract or reflect incident light in an optical axis direction of the lens module. Among the lenses constituting the lens module, an effective radius of a lens closest to the first optical path folding unit may have substantially the same size as an effective radius of an exit surface of the first optical path folding unit.

Abstract: A lens assembly includes a first D-cut lens and a lens barrel surrounding a portion of a side surface of the first D-cut lens. The side surface of the first D-cut lens includes a linear portion, and the lens barrel is configured to expose at least a portion of the linear portion of the first D-cut lens in a direction perpendicular to an optical axis.

Abstract: In one embodiment of the present invention, provided are: a composite membrane comprising a polyolefin-based porous support and a solid electrolyte impregnated into the support; and a manufacturing method therefor.

Abstract: A camera module includes a lens module including a plurality of lenses having refractive power, a first optical path folding unit disposed on the object side of the lens module and configured to refract or reflect incident light in an optical axis direction of the lens module. Among the lenses constituting the lens module, an effective radius of a lens closest to the first optical path folding unit may have substantially the same size as an effective radius of an exit surface of the first optical path folding unit.

Abstract: One aspect of the present invention provides a method of manufacturing a multi-layer separator, which includes (a) extruding a first composition including a first polyolefin and a first pore forming agent to obtain a first sheet; (b) extruding a second composition including a second polyolefin and a second pore forming agent to obtain a second sheet; (c) stretching each of the first sheet and the second sheet in the machine direction (MD) to obtain a first precursor film and a second precursor film; (d) laminating the first precursor film and the second precursor film to obtain a stacked structure; and (e) stretching the stacked structure in the transverse direction (TD), and then removing the first pore forming agent and the second pore forming agent from the stacked structure.

Abstract: An imaging lens system includes a lens group including a plurality of lenses, and an optical path folding member disposed on an image side of the lens group, wherein ?1.2<fR/PL<?0.40, where fR is a focal length of a rearmost lens disposed closest to an imaging plane in the lens group, and PL is a distance from an incident surface of the optical path folding member to an exit surface of the optical path folding member.

Abstract: An optical imaging system includes a first lens having positive refractive power, a second lens having refractive power, a third lens having refractive power, a fourth lens having refractive power, a fifth lens having negative refractive power, wherein the first to fifth lenses are sequentially disposed from an object side, and a reflective member having a plurality of reflective surfaces to reflect the light refracted by the fifth lens multiple times, wherein 3<BFL/TL<7 is satisfied, where BFL is a distance on an optical axis from an image-side surface of the fifth lens to an imaging plane, and TL is a distance on an optical axis from an object-side surface of the first lens to the image-side surface of the fifth lens.

Abstract: In one embodiment of the present invention, provided are: a composite membrane comprising a polyolefin-based porous support and a solid electrolyte impregnated into the support; and a manufacturing method therefor.

Abstract: The present disclosure relates to a separator and a method of manufacturing the separator. The separator includes a porous support and a hydrophilic polymer applied to the surface of the porous support through a solution including the hydrophilic polymer and a solvent, and satisfies the following Equation: 0.015?(C*D)/(A*B)?0.65, where A is a thickness (?m) of the porous support, B is an air permeability (Gurley, seconds/100 ml) of the porous support, C is a porosity (% by volume) of the porous support, and D is a content (% by weight) of the hydrophilic polymer in the solution.

Abstract: The present invention provides a novel Lactobacillus sp. strain, which has high antibacterial activity against various pathogenic bacteria, including bacteria associated with fish diseases and dental cavities, inhibits the production of melanin and promotes the synthesis of collagen, and thus can be utilized as a material for a variety of foods and medicines, and the use thereof.

Abstract: The present invention provides a separator that is formed of a porous film that has a hydrophobic region containing a polyolefin, and a hydrophilic region containing a hydrophilic polymer dispersed in the hydrophobic region, wherein the content of the hydrophilic region in the porous film is 0.1 to 7.5 wt %, and a method of manufacturing the same.

Abstract: The present invention provides a method of manufacturing a separator, which includes: (a) manufacturing a base film by extruding and stretching a composition that includes a crosslinkable polyolefin in which a silane-based compound is grafted to a first polyolefin, a non-crosslinkable polyolefin consisting of a second polyolefin, and a pore-forming agent; (b) applying a crosslinking catalyst to the surface of the base film while extracting the pore-forming agent from the base film by applying a solution including the crosslinking catalyst and an extraction solvent to the base film; and (c) crosslinking the crosslinkable polyolefin while removing the extraction solvent remaining on the base film by applying heat and steam to the base film.

Abstract: An optical imaging system includes a first lens having positive refractive power, a second lens having refractive power, a third lens having refractive power, a fourth lens having refractive power, a fifth lens having negative refractive power, wherein the first to fifth lenses are sequentially disposed from an object side, and a reflective member having a plurality of reflective surfaces to reflect the light refracted by the fifth lens multiple times, wherein 3<BFL/TL<7 is satisfied, where BFL is a distance on an optical axis from an image-side surface of the fifth lens to an imaging plane, and TL is a distance on an optical axis from an object-side surface of the first lens to the image-side surface of the fifth lens.