An optical system includes a diaphragm, and a first cemented lens disposed adjacent to an object side of the diaphragm. The first cemented lens included a negative lens. A predetermined condition is satisfied.

An optical imaging lens, in order from an object side to an image side along an optical axis, includes a first optical assembly, a second optical assembly, a third optical assembly, a first aperture, a fourth optical assembly, a fifth optical assembly, a second aperture, a sixth optical assembly, and a seventh optical assembly, wherein one of the first optical assembly, the second optical assembly, the third optical assembly, the fourth optical assembly, the fifth optical assembly, the sixth optical assembly, and the seventh optical assembly is a compound lens formed by adhering at least two lenses, while the others are single lens, thereby achieving the effect of high image quality and low distortion.

A cemented lens may include a first lens and a second lens connected via an adhesive layer. The first lens may include a convex surface facing toward the second lens, and a first flange surrounding an outer circumference of the convex surface. The second lens may include a concave surface connected to the convex surface, and a second flange surrounding an outer circumference of the concave surface. One of the first and second flange may include a projection protruding toward an other of the first and second flange. The other of the first and second flange may include an opposed portion opposed to a side surface of the projection Ga is a distance between the convex surface and the concave surface, and Gb is a distance between the side surface and the opposed portion, and the following expression: Gb<Ga may be satisfied.

A meta lens assembly includes a first meta lens, a second meta lens arranged on an image side of the first meta lens, and a third meta lens arranged on an image side of the second meta lens, the first meta lens, the second meta lens, and the third meta lens being arranged from an object side of the meta lens assembly to an image side of the meta lens assembly facing an image sensor.

A camera for a portable electronic device is provided. The camera comprises a housing, a first lens assembly (101) having a first optical axis, a second lens assembly (105, 107) having a second optical axis, a mirror (103) placed at a point of intersection of the first and the second optical axis, and an image sensor (109) placed on the second optical axis. Furthermore, the camera comprises an image stabilisation apparatus, comprising a first detector configured to generate a first signal in response to a rotation of the camera about an axis that is perpendicular to both the first and the second optical axis and a first actuator configured to rotate the first lens assembly (101) and the mirror (103) in response to the first signal relative to the housing about a first rotation axis perpendicular to the first and second optical axis for compensating the rotation of the camera.

An optical imaging lens, in order from an object side to an image side along an optical axis, includes a first optical assembly, a second optical assembly, a third optical assembly, an aperture, a fourth optical assembly, and a fifth optical assembly, wherein two of the first optical assembly, the second optical assembly, the third optical assembly, the fourth optical assembly, and the fifth optical assembly are a compound lens formed by adhering at least two lenses, while the others are single lens, thereby achieving the effect of high image quality and low distortion.

An imaging lens including a first lens group and a second lens group. Each of the first lens group and the second lens group includes three lenses with refractive power. The first lens group includes two aspheric lenses and a glass lens, and an outermost lens surface of the first lens group facing an object side is a spherical surface. The second lens group includes an aspheric lens and a glass lens, and the second lens group includes a cemented surface. An aperture stop of the imaging lens is disposed between the first lens group and the second lens group.

An imaging optical system includes an infrared light absorbing element, an infrared light reducing film and a plate element in order along a paraxial path. The infrared light absorbing element is made of an infrared light absorbing plastic material, and the infrared light absorbing element is configured to refract a light. The infrared light reducing film is closer to an image surface of the imaging optical system than an incident surface of the infrared light absorbing element to the image surface of the imaging optical system. The plate element is disposed between the infrared light reducing film and the image surface, the plate element includes a translucent portion, a holder portion and a taper structure coating. The taper structure coating is disposed on at least one of an incident surface and an exit surface of the translucent portion.

A fixed focal length lens system includes, in order from an object side to an image side, first lens element having negative power, second lens element having negative power, third lens element having positive power, fourth lens element having power, fifth lens element having power, and sixth lens element having positive power. The third lens element is a positive meniscus lens element having a convex surface on the image side. At least one of second to sixth lens elements is made of glass. The fixed focal length lens system satisfies condition (1) below:
0<(L1R2+L2R1)/(L1R2−L2R1)<100  (1)
where L1R2 is a radius of curvature of an image-side surface of first lens element, and L2R1 is a radius of curvature of an object-side surface of second lens element.

The zoom lens consists of a first lens group, a front group, a middle group, and a rear group, in order from an object side. The first lens group has a positive refractive power and includes a negative lens and a positive lens, successively in order from a position closest to the object side to an image side. The front group consists of one or more lens groups that move during zooming and has a negative refractive power as a whole throughout an entire zoom range. The middle group includes only one lens group as a lens group. The rear group consists of a plurality of lens groups. An aperture stop is disposed between a lens surface closest to the image side in the front group and a lens surface closest to the object side in the rear group. The zoom lens satisfies predetermined conditional expressions.