Abstract: The present disclosure provides a miniature imaging lens including, along an optical axis in order from an object side to an image side, a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; a sixth lens having a negative refractive power; and a filter. The miniature imaging lens satisfies a conditional expression 2<f1/R1<3, where f1 denotes a focal length of the first lens, and R1 denotes a radius of curvature of the object-side surface of the first lens.

Abstract: A collimator lens includes a first lens, a second lens and a diaphragm from an object side to an image side of the assembly in turn along an optical axis, in which the first lens is of a positive focal power, and an object side surface thereof is convex; the second lens is of a positive focal power, and an image side surface thereof is convex; optical centers of the first lens and the second lens are arranged along a same straight line, the system meets following formulas: f1>f2; (dn/dt)1<?50×10?6/° C.; (dn/dt)2>?10×10?6/° C., where f1 represents a focal length of the first lens, f2 represents a focal length of the second lens, (dn/dt)1 represents a change rate of a refractive index of the first lens with temperature, and (dn/dt)2 represents a change rate of a refractive index of the second lens with temperature.

Abstract: The present disclosure provides a method, a device and a system for correcting distortion of a wide-angle lens. The method includes: acquiring n half field of views FOVs ?1 to ?n of the wide-angle lens, and acquiring ratios of adjacent FOVs ?1 to ?(n?1) according to the n half FOVs ?1 to ?n; obtaining image heights IHs r1 to rn corresponding to the n half FOVs according to the n half FOVs ?1 to ?n; obtaining an IH relationship of adjacent half FOVs according to the ratios of adjacent FOVs ?1 to ?(n?1) and the IHs r1 to rn corresponding to the n half FOVs, and obtaining the IH of each half FOV through recurrence calculation according to an IH corresponding to a maximum FOV and the IH relationship of adjacent half FOVs; and correcting distortion of the wide-angle lens across FOVs according to the IH of each half FOV.

Abstract: The disclosure discloses a camera lens and an imaging device, and the camera lens includes: a front lens group close to the object-side, a reflective element, a diaphragm and a rear lens group close to the image-side, wherein the front lens group comprises a first lens and a second lens; the rear lens group includes a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens; the front lens group is a negative refractive index lens group, the rear lens group is a positive refractive index lens group; the reflective element is disposed between the second lens and the third lens; the diaphragm is disposed between the third lens and the fourth lens. The camera lens and the imaging device of the present disclosure may not generate vignetting at the large field of view.

Abstract: The present invention is concerned with PCR-based detection methods and kits for the identification, differentiation, and quantification of different bacterial strains (e.g., Gram-negative bacterial strains), and also association of two or more PCR-positive genes to a single genome. The methods generally comprise carrying out PCR reactions using at least a first PCR primer set and/or probe for at least one target nucleic acid; and a second PCR primer set and/or probe for at least a second target nucleic acid. Positive PCR reaction products are then detected to determine test samples containing positive PCR reaction products for both the first and second target nucleic acids. This information can be used to calculate the gene association rate to determine whether the sample contains, for example, Shiga toxin-producing E. coli of the O-type serogroup.

Abstract: The present invention is concerned with PCR-based detection methods and kits for the identification, differentiation, and quantification of different bacterial strains (e.g., Gram-negative bacterial strains), and also association of two or more PCR-positive genes to a single genome. The methods generally comprise carrying out PCR reactions using at least a first PCR primer set and/or probe for at least one target nucleic acid; and a second PCR primer set and/or probe for at least a second target nucleic acid. Positive PCR reaction products are then detected to determine test samples containing positive PCR reaction products for both the first and second target nucleic acids. This information can be used to calculate the gene association rate to determine whether the sample contains, for example, Shiga toxin-producing E. coli of the O-type serogroup.