Abstract: The present disclosure discloses an optical imaging system including twelve lenses, sequentially from the object side to the image side. The optical imaging system satisfies following conditions satisfying: ?40.00?f9/d17??5.00; 2.00?d23/d22?18.00; ?6.51?f12?/f34??1.00; 4.00?IH*f/TTL?15.00, where f9 denotes a focal length of the ninth lens; d17 denotes an on-axis thickness of the ninth lens; d23 denotes an on-axis thickness of the twelfth lens; d22 denotes an on-axis distance from the image-side surface of the eleventh lens to the object-side surface of the twelfth lens; f12? denotes a combined focal length of the first lens and the second lens; f34 denotes a combined focal length of the third lens and the fourth lens; f, IH, TTL respectively denotes a focal length, an image height and a total optical length of the optical imaging system.

Abstract: The present disclosure discloses an optical imaging system satisfying: 0.38?f10-12/f?0.90, ?21.70?f7-8/(d13+d15)??1.00, 2.00?d17/d18?10.00, and 1.00? (d1+d3)/d23??5.00, where f denotes a focal length of the optical imaging system; f10-12 denotes a combined focal length of the tenth lens, the eleventh lens and the twelfth lens; f7-8 denotes a combined focal length of the seventh lens and the eighth lens; d1 and d3 denotes an on-axis thickness of the first and second lens; d23? denotes an on-axis distance from the second lens to the third lens; d13, d15 and d17 denotes an on-axis thickness of the seventh, eighth, and ninth lens; and d18 denotes an on-axis distance from the ninth lens to the tenth lens. The optical imaging system of the present disclosure has good optical performance, variable aperture and low distortion, and can change the depth of field during measurement.

Abstract: The present disclosure relates to a field of optical lens, and provides a camera optical lens including, from an object side to an image side in sequence, a first lens having negative refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power and a seventh lens having positive refractive power; where the camera optical lens satisfies conditions of: ?50.10?f2/f??22.90; 9.20?d2/d4?30.00; and ?11.10?R5/f??9.55.

Abstract: An object of the present invention is to provide an industrially advantageous method for producing uracil compound, which is a production intermediate of a 2,6-dioxo-3,6-dihydropyrimidine compound, and ureidomethylene compound applicable as a raw material for uracil compounds. The present invention is characterized in that uracil compound, which is a production intermediate of a 2,6-dioxo-3,6-dihydropyrimidine compound, is produced by subjecting a compound of formula (II) below or a salt thereof to chemical reaction in the presence of an organic base or an inorganic base. In formula (II), X1 represents a hydrogen atom or a substituted or unsubstituted C1-6 alkyl group, X2 represents a hydrogen atom or a substituted or unsubstituted linear C1-6 alkyl group, etc., R1 represents a hydrogen atom or a substituted or unsubstituted C1-6 alkyl group, etc., R2 represents a hydrogen atom or a substituted or unsubstituted C1-6 alkyl group, and R3 represents a substituted or unsubstituted C1-6 alkyl group, etc.

Abstract: An object of the present invention is to provide a 2,6-dioxo-3,6-dihydropyrimidine compound that has excellent bactericidal and antimicrobial activity, has excellent safety, and can be industrially favorably synthesized, and an agricultural and horticultural fungicide, a nematicide, and an antifungal agent for use in medicine/animals that contain the compound as an active ingredient.

Abstract: The present disclosure relates to a field of optical lens, and provides a camera optical lens including, from an object side to an image side in sequence, a first lens having negative refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power and a seventh lens having positive refractive power; where the camera optical lens satisfies conditions of: ?50.10?f2/f??22.90; 9.20?d2/d4?30.00; and ?11.10?R5/f??9.55.

Abstract: The present disclosure relates to the technical field of optical lens and discloses a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens and a sixth lens. And the camera optical lens satisfies following conditions: 2.00?f1/f2?5.00 and 2.00?R3/R4?4.50, where f1 denotes a focal length of the first lens; f2 denotes a focal length of the second lens; R3 denotes a curvature radius of an object-side surface of the second lens; and R4 denotes a curvature radius of an image-side surface of the second lens. The camera optical lens of the present disclosure can achieve a high imaging performance while obtaining a low TTL.

Abstract: The present disclosure relates to a field of optical lens, and provides a camera optical lens including, from an object side to an image side in sequence, a first lens having negative refractive power, a second lens having positive refractive power, a third lens having positive refractive power, a fourth lens having negative refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power and a seventh lens having negative refractive power; wherein the camera optical lens satisfies conditions of: ?55.00?R1/d1??18.00; 1.42?f2/f?1.96; and 2.70?f4/f1?10.10. By adjusting the conditions, the camera lens has a suitable field angle for front lens and excellent optical performance.

Abstract: The present disclosure relates to optical lens, in particular to a camera optical lens, comprising, from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens; the second lens has a negative refractive power, and the third lens has a negative refractive power; wherein the camera optical lens satisfies the following conditions: 2.00?f1/f?3.00, ?20.00?R5/d5??10.00; where, f denotes a focus length of the camera optical lens, f1 denotes a focus length of the first lens, R5 denotes a curvature radius of an object side surface of the third lens, and d5 denotes an on-axis thickness of the third lens. The camera optical lens has a high performance and satisfies a design requirement of low TTL.

Abstract: The present disclosure relates to the technical field of optical lens and discloses a camera optical lens. The camera optical lens includes, 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 negative refractive power, a fourth lens, a fifth lens and a sixth lens. The camera optical lens satisfies following conditions: 1.00?f2/f3?10.00 and 2.00?d3/d5?3.00, where f2 denotes a focal length of the second lens; f3 denotes a focal length of the third lens; d3 denotes an on-axis thickness of the second lens; and d5 denotes an on-axis thickness of the third lens. The camera optical lens can achieve a high imaging performance while obtaining a low TTL.

Abstract: Provided is a camera optical lens including first to seventh lenses. The camera optical lens satisfies following conditions: 1.50?d1/d13?3.00; 5.00?(d1+d2)/d6?8.00; and ?50.00?(R5+R6)/(R7+R8)??5.00, where d1 and d13 denote on-axis thicknesses of the first and seventh lenses, respectively; d2 denotes an on-axis distance from an image side surface of the first lens to an object side surface of the second lens; d6 denotes an on-axis distance from an image side surface of the third lens to an object side surface of the fourth lens; R5 and R6 denote curvature radiuses of an object side surface and the image side surface of the third lens, respectively; and R7 and R8denote curvature radiuses of the object side surface and an image side surface of the fourth lens, respectively. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.

Abstract: The present disclosure relates to the technical field of optical lens and discloses a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens, a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens, a fifth lens and a sixth lens. And the camera optical lens satisfies following conditions: ?5.00?f1/f3??2.50 and ?10.00?R5/R6??2.00, where f1 denotes a focal length of the first lens; f3 denotes a focal length of the third lens; R5 denotes a curvature radius of an object-side surface of the third lens; and R6 denotes a curvature radius of an image-side surface of the third lens. The camera optical lens of the present disclosure can achieve a high imaging performance while obtaining a low TTL.

Abstract: The present disclosure discloses a camera optical lens. The camera optical lens includes, in an order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The camera optical lens further satisfies following conditions: ?5.00f1/f3?1.10; ?10.00 R5/R6?1.00; where f3 denotes a focal length of the third lens; f1 denotes a focal length of the first lens; R5 denotes a curvature radius of an object side surface of the third lens; and R6 denotes a curvature radius of an image side surface of the third lens. The camera optical lens can achieve a high performance while obtaining a low TTL.

Abstract: The present invention discloses a camera optical lens with seven-piece lenses including, from an object side to an image side in sequence, 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 refractive power, a fifth lens having a positive refractive power, a sixth lens having a negative refractive power and a seventh lens having a negative refractive power. Herein the camera optical lens satisfies the following conditions: ?10.00?f4/f?10.00, 4.00?d5/d6?8.00, and 2.00?(R3+R4)/(R3?R4)?10.00. The camera optical lens according to the present invention has excellent optical characteristics, such as large aperture, wide-angle, and ultra-thin.

Abstract: The present invention discloses a camera optical lens with seven-piece lenses including, from an object side to an image side in sequence, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens satisfies the following conditions: ?1.00?f6/f?10.00, 1.00?d5/d6?5.00, and 1.00?R3/R4?5.00. The camera optical lens according to the present invention has excellent optical characteristics, such as large aperture, wide-angle, and ultra-thin.

Abstract: The present invention discloses a camera optical lens consisting of seven-piece lenses including 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 negative refractive power, a sixth lens having a positive refractive power and a seventh lens having a negative refractive power. The camera optical lens satisfies the following conditions: 0.15?f5/f4?0.50, ?15.00?(R9+R10)/(R13+R14)??6.00, and 1.00?d4/d6?8.00. The camera optical lens according to the present invention has excellent optical characteristics, such as large aperture, wide angle, and ultra-thin.

Abstract: The present invention discloses a camera optical lens with seven-piece lenses including, from an object side to an image side in sequence, 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 negative refractive power, a sixth lens having a positive refractive power and a seventh lens having a negative refractive power. The camera optical lens satisfies the following conditions: ?3?f3/f2??2 and ?4?(R1?R2)/(R3?R4)??1.5. The camera optical lens according to the present invention has excellent optical characteristics, such as large aperture, wide-angle, and ultra-thin.

Abstract: The present invention discloses a camera optical lens with seven-piece lenses including, from an object side to an image side in sequence, 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 negative refractive power, a sixth lens having a positive refractive power and a seventh lens having a negative refractive power; wherein the camera optical lens satisfies the following conditions: 20.00?R7/d7?40.00, ?20.00?R13/d13??5.00, and 4.00?d1/d2?15.00. The camera optical lens according to the present invention has excellent optical characteristics, such as large aperture, wide-angle, and ultra-thin.

Abstract: The present disclosure relates to the field of optical lenses and provides a camera optical lens sequentially including, 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 negative refractive power; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power; a sixth lens having a positive refractive power; and a seventh lens having a negative refractive power. The camera optical lens satisfies following conditions: 3.50?f3/f2?6.00; ?1.50?f5/f4??0.60; and ?1.50?f1/f7??0.60, where f1, f2, f3, f4, f5 and f7 denotes focal lengths of the first, second, third, fourth, fifth and seventh lenses, respectively. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures.

Abstract: The present disclosure relates to an optical lens, in particular to a camera optical lens. The camera optical lens includes, from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, the second lens has a positive refractive power, and the third lens has a negative refractive power, and the camera optical lens satisfies the following conditions: ?5.00?f1/f3??1.00, and 5.00?R5/R6?7.00, where f1 denotes a focal length of the first lens, f3 denotes a focal length of the third lens, R5 denotes a curvature radius of an object-side surface of the third lens, R6 denotes a curvature radius of an image-side surface of the third lens. The camera optical lens can obtain high imaging performance and a low TTL.