Apparatus for an optical system optimized for PDAF depth sensing are disclosed herein. An example apparatus includes a phase detection auto focus (PDAF) sensor including a plurality of focus pixels and a plurality of micro lenses. The example apparatus also includes an optical system located above the PDAF sensor and configured to direct light to the micro lenses of the PDAF sensor. In some examples, the optical system includes a lens and an opaque element configured to block light through the lens except for at least one circular asymmetric subsection of the lens.

One example zoom lens group is disposed on an object side of an imaging lens group along a direction of an optical axis. The example zoom lens group includes an optical element and a drive element, and the drive element drives the optical element to move along a first direction, causing the optical element to cut into or move out of an optical path to implement zoom. The first direction is set at an included angle with the optical axis, and when the optical element cuts into the optical path, the optical element enlarges a field of view.

The present invention relates to a reflective eyepiece optical system and a head-mounted near-to-eye display apparatus. The system includes: a first lens group, and a first optical element and a second lens group for transmitting and reflecting a light from a miniature image displayer. The second lens group includes an optical reflection surface, and the optical reflection surface is an optical surface farthest from a human eye viewing side in the second lens group. The optical reflection surface is concave to a human eye viewing direction. The first optical element reflects the light refracted by the first lens group to the second lens group, and then transmits the light refracted, reflected, and refracted by the second lens group to the human eye.

The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.

A zoom lens group is provided and includes a cover, a first magnetic device and at least two lenses. The cover includes an installation cavity, and the first magnetic device is connected to the cover. Each of the at least two lenses is movably arranged in the installation cavity and provided with a second magnetic device. The first magnetic device is configured to attract the second magnetic device to calibrate each of the at least two lenses, in such a manner that axes of the at least two lenses coincide with each other. The zoom lens group can calibrate the camera lenses, thereby increasing precision of the zoom lens group and improving the imaging effect.

The present invention provides a zoom lens, at least including a first camera lens, a second camera lens, a first motor assembly, and a housing. The first camera lens and the second camera lens are installed in the housing. The first motor assembly is installed to the housing and connected to the first camera lens, so as to drive the first camera lens to move relative to the second camera lens to change a focal length. For the zoom lens provided by the present invention, the first camera lens is driven by the first motor assembly, which requires a lower cost, a simpler structure, and is easier to process, thereby better meeting the actual use requirements.

A periscope-type zooming camera module which requires no voice-coil unit includes a light steering device, a lens unit, a light sensing assembly, and a zooming assembly. The light steering device changes transmission direction of light. The lens unit is arranged to receive light from the light steering device; and the light sensing assembly is arranged to receive light from the lens unit. The zooming assembly merely requires different levels of voltage to zoom in and out, adjusting focal length of the lens unit.

Provided is a finder device capable of preventing dust on a display surface of a display element and reducing an influence of heat which is generated from the display element on an optical system.

An EVF 1 includes: an optical system 20 that includes a display element 10, a first lens group G1 disposed in order from the display element 10 side, and a second lens group G2; a first holding frame 30 that holds the display element 10 and the first lens group G1 to seal a space between the display element 10 and the first lens group G1; a second holding frame that holds the second lens group G2; and a diopter adjustment unit 50 that adjusts a diopter by integrally moving the display element 10 and the first lens group G1 relative to the second lens group G2.

The present application discloses a zoom lens assembly having a first static lens group and a second static lens group defining an assembly optical axis secured to a lens support. A first guide member having a first guide member axis is secured to the lens support, and a second guide member having a second guide member axis is secured to the first guide member. A first mobile carriage is slidably coupled to the first guide member and a first mobile lens cell having a first optical axis is secured to the first mobile carriage. A second mobile carriage is slidably coupled to the first guide member, with a second mobile lens cell having a second optical axis secured to the second mobile carriage. The zoom lens assembly further includes a third mobile carriage slidably coupled to the second guide member, with a third mobile lens cell having a third optical axis secured to the third mobile carriage. The first guide member axis and the second guide member axis are substantially parallel, and the first optical axis, second optical axis, and the third optical axis are substantially collinear with the assembly optical axis.

A modular finite conjugate zoom lens assembly with five lens groups each including a doublet, wherein two or three movable lens groups are disposed between a pair of static lens groups.