Abstract: An optical system, a camera module, and an electronic device are provided. The optical system includes a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power which are sequentially arranged from an object side to an image side along an optical axis of the optical system. The first lens group includes a first lens. The second lens group includes a second lens, a third lens, and a fourth lens. The third lens group includes a fifth lens, a sixth lens, a seventh lens, and an eighth lens. A distance between any two groups of the first lens group, the second lens group, and the third lens group is adjustable such that the optical system is operable to be at a telephoto end, an intermediate, and a wide-angle end.

Abstract: An optical system, a lens module, and an electronic device are provided. The optical system includes sequentially, from an object side to an image side along an optical axis, first to seventh lenses. Object-side surfaces and image-side surfaces of the first lens and the fifth to seventh lenses are aspheric surfaces. The object-side surfaces of the first lens and the fifth lens are convex near the optical axis. The object-side surface and the image-side surface of the second lens are concave. The object-side surface and the image-side surface of the third lens are convex. The object-side surface of the sixth lens is concave near the optical axis. The image-side surface of the seventh lens is concave near the optical axis.

Abstract: An optical system, a lens module, and an electronic device are provided. The optical system includes sequentially, from an object side to an image side, first to eighth lenses each with a refractive power. The optical system satisfies the expression: 2<fcj/fdj<3, where fcj represents an effective focal length of the optical system at a long focal length end, and fdj represents an effective focal length of the optical system at a short focal length end.

Abstract: The optical system includes, a first lens having a positive refractive power, an object side surface thereof being convex near an optical axis, and an image side surface thereof being concave near the optical axis; a second lens having a negative refractive power, an object side surface thereof being convex near the optical axis, and an image side surface thereof being concave near the optical axis; a third lens having a positive refractive power; a fourth lens having a negative refractive power; a fifth lens having a refractive power; a sixth lens having a positive refractive power, an object side surface thereof being convex near the optical axis; a seventh lens having a negative refractive power, an object side surface thereof being convex near the optical axis, and an image side surface thereof being concave near the optical axis; the optical system satisfies the following condition: 1?TTL/ImgH?1.12.

Abstract: A clove essential oil Pickering emulsion-based coating preservative, and a preparation method and use thereof. Preparing a 20 mg/ml zein solution with ethanol and a zein powder, preparing a 0.4 mg/ml to 6 mg/ml sodium caseinate solution with ultrapure water and sodium caseinate, and conducting magnetic stirring overnight; adding the zein solution dropwise into the sodium caseinate solution, and conducting magnetic stirring; conducting evaporation on the ethanol in the zein solution, and replacing evaporated ethanol with the ultrapure water; adding a clove essential oil, and conducting high-speed homogenization for 3 min to obtain a clove essential oil Pickering emulsion; and preparing a 1.5% w/v to 2% w/v chitosan solution with 1% v/v acetic acid and chitosan, adding the clove essential oil Pickering emulsion to the chitosan solution, conducting high-speed homogenization for 3 min, and conducting ultrasonic defoaming for 30 min to obtain the clove essential oil Pickering emulsion-based coating preservative.

Abstract: A lens system includes, sequentially from an object side to an image side, a first optical path folding element located on a first part of the folded optical axis and configured to direct light from the first part of the folded optical axis to a second part of the folded optical axis; a lens group located on the second part of the folded optical axis; a second optical path folding element configured to direct light from the second part of the folded optical axis to a third part of the folded optical axis; and a third optical path folding element configured to direct light from the third part of the folded optical axis to a fourth part of the folded optical axis. The second part, the third part, and the fourth part are located within a same plane that is perpendicular to the first part.

Abstract: An optical system, sequentially comprising from an object side to an image side: a first lens having positive refractive power, an object side surface of the first lens being convex at the optical axis; a second lens having negative refractive power, an image side surface of the second lens being concave at the optical axis; a third lens having positive refractive power, an image side surface of the third lens being convex at the optical axis; and a fourth lens having negative refractive power, an image side surface of the fourth lens being concave at the optical axis. The optical system further satisfy the following relation: 0.28<M<1.3, M being the magnification of the optical system.

Abstract: An optical system, a camera module, and an electronic device are provided. The optical system includes a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive refractive power which are sequentially arranged from an object side to an image side along an optical axis of the optical system. The first lens group includes a first lens. The second lens group includes a second lens, a third lens, and a fourth lens. The third lens group includes a fifth lens, a sixth lens, a seventh lens, and an eighth lens. A distance between any two groups of the first lens group, the second lens group, and the third lens group is adjustable such that the optical system is operable to be at a telephoto end, an intermediate, and a wide-angle end.

Abstract: A semiconductor structure and a method for fabricating a semiconductor structure are provided. The method includes forming one or more fins on a substrate, wherein each fin includes a first sidewall and a second sidewall opposing each other. The method also includes forming a sacrificial layer over the fin. Further, the method also includes performing a first ion implantation process on the first sidewall and a top of the fin, and performing a second ion implantation process on the second sidewall and the top of the fin.

Abstract: A semiconductor structure and a method for fabricating a semiconductor structure are provided. The method includes forming one or more fins on a substrate, wherein each fin includes a first sidewall and a second sidewall opposing each other. The method also includes forming a sacrificial layer over the fin. Further, the method also includes performing a first ion implantation process on the first sidewall and a top of the fin, and performing a second ion implantation process on the second sidewall and the top of the fin.

Abstract: A projector having a first end and a second end opposite to the first end includes an image source, a mirror and a first lens set. The image source is disposed at the first end, and projects lights of an image along a first direction. The mirror is disposed at the second end along the first direction. The first lens set is disposed between the image source and the mirror, and forms for the lights a common aperture located between the first lens set and the mirror.

Abstract: A zoom lens includes a first, a second, a third and a fourth lens groups that are arranged along an optical axis and from an object side to an image side in sequence. The refractive powers of the four lens groups are positive, negative, positive and positive, respectively. The first and the third lens groups are fixed at a fixed position. The second lens group is movable along the optical axis in accordance with the change of magnification. The fourth lens group is movable along the optical axis in accordance with keeping an image plane fixed at an image sensor. The present invention has at least four pieces of lens that are made of plastic material in order to decrease camera lens weight and move easily the lens groups. In addition, the present invention has small variation of aperture value, moderate zoom ratio and compact size at the same time.

Abstract: A zoom lens includes a first, a second, a third and a fourth lens groups that are arranged along an optical axis and from an object side to an image side in sequence. The refractive powers of the four lens groups are positive, negative, positive and positive, respectively. The first and the third lens groups are fixed at a fixed position. The second lens group is movable along the optical axis in accordance with the change of magnification. The fourth lens group is movable along the optical axis in accordance with keeping an image plane fixed at an image sensor. The present invention has at least four pieces of lens that are made of plastic material in order to decrease camera lens weight and move easily the lens groups. In addition, the present invention has small variation of aperture value, moderate zoom ratio and compact size at the same time.

Abstract: According to one embodiment, a user logs into a bank account and access a bill payment service through the bank. The user enters a recipient's email address and an amount to be transferred from the user's account to the recipient. The bill payment service transfers the amount to a payment provider, who then transfers the amount to the recipient if the recipient has an account with the payment provider. As a result, recipients who are not part of a bill payment service can quickly receive payments, and users can make quickly and easily payments to recipients who are not part of a bill payment service by simply entering an email address and payment amount.