Abstract: A camera optical lens includes, from an object side to an image side: a first lens having positive refractive power; a second lens having positive refractive power; a third lens having negative refractive power; a fourth lens having positive refractive power; and a fifth lens having positive refractive power. The first lens is made of glass material. At least one of the second, third, fourth and fifth lenses is made of glass material. Working temperature of the camera optical lens ranges from ?40° C. to 105° C. The camera optical lens satisfies following conditions: 1.50?TTL/f?4.00; 1.70?n1?2.20; and R3/R4??2.00, f denotes a focal length of the camera optical lens; TTL denotes a total optical length; n1 denotes a refractive index of the first lens; R3 denotes a central curvature radius of an object-side surface of the second lens, and R4 denotes a central curvature radius of an image-side surface of the second lens.

Abstract: The present disclosure provides a casing and a lens and relates to the technical field of optical equipment. The casing includes an outer casing provided with an accommodating hole and an inner casing accommodated in the outer casing and provided with a mounting hole. The outer casing is made of metal material, and a hardness of the inner casing is lower than a hardness of the outer casing, thereby the outer casing can meet the metal shape requirements of the lens. The relatively soft inner casing can solve the problem that a metal material cannot be tightly fitted with the lens group. The casing not only has advantages of metal profiles, but also can take a fitting structure with stacked outer diameters and a bumpy ridge fitting structure into account due to providing the relatively soft inner casing inside, which is more beneficial for lenses with high performance requirements.

Abstract: The present application discloses a portable electronic device. The device includes a case; a camera lens fixed to the case; a sound generator attached to the case for producing sounds; and a central process unit and a circuit system for providing controlling current to the camera lens. The camera lens includes a side wall and a lens holder moveable relative to the side wall. The lens holder is driven to a predetermined position farther away from the case than an initial position, when the sound generator is producing sounds. The present application further provides a method for eliminating noise by applying controlling current to the lens holder to move the lens holder to a position farther away from the case for avoiding collision between the case and the lens holder.

Abstract: The present application discloses a portable electronic device. The device includes a case; a camera lens fixed to the case; a sound generator attached to the case for producing sounds; and a central process unit and a circuit system for providing controlling current to the camera lens. The camera lens includes a side wall and a lens holder moveable relative to the side wall. The lens holder is driven to a predetermined position farther away from the case than an initial position, when the sound generator is producing sounds. The present application further provides a method for eliminating noise by applying controlling current to the lens holder to move the lens holder to a position farther away from the case for avoiding collision between the case and the lens holder.