An optical imaging lens assembly includes, sequentially along an optical axis from an object side to an image side: a first lens, having a negative refractive power, an image-side surface of the first lens being a concave surface; a second lens, having a positive refractive power, an object-side surface of the second lens being a convex surface; and a third lens, having a refractive power, an object-side surface of the third lens being a convex surface. A Half of a diagonal length ImgH of an effective pixel area on an image plane of the optical imaging lens assembly, an effective focal length f of the optical imaging lens assembly and an entrance pupil diameter EPD of the optical imaging lens assembly satisfy: 3 mm<ImgH×f/EPD<4 mm. A maximal field-of-view FOV of the optical imaging lens assembly and the effective focal length f of the optical imaging lens assembly satisfy: 1 mm<tan(FOV/2)×f<2 mm.

An optical lens system includes, in order from the object side to the image side: a first lens with negative refractive power, a stop, a second lens with positive refractive power, and a third lens with positive refractive power, wherein a distance from an object-side surface of the first lens to an image-side surface of the third lens along an optical axis is TD, a distance from the image-side surface of the third lens to an image plane along the optical axis is BFL, half of a maximum view angle (field of view) of the optical lens system is HFOV, an incident pupil aperture of the optical lens system is EPD, and following conditions are satisfied: 1.82<TD/BFL<3.8 and 3.10<sin(HFOV)/EPD<8.12.

An image capturing optical lens assembly includes three lens elements, the three lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element and a third lens element. Each of the three lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The second lens element has negative refractive power. The object-side surface of the third lens element is concave in a paraxial region thereof, and the image-side surface of the third lens element is convex in a paraxial region thereof. The image capturing optical lens assembly has a total of three lens elements.

An optical system includes a first lens group, a second lens group, and a lens drive device. The first lens group and the second lens group satisfy conditional expressions (1) to (5) below:

[00001]$-\text{6}\text{.0}\text{<}\text{f}\text{/}\text{f2}\text{<}-\text{2}\text{.0}$

[00002]$\text{ih}\text{/}\text{f}\text{<}\text{0}\text{.4}$

[00003]$0.7<\text{TTL/f}\text{<}\text{1}\text{.0}$

[00004]$1.6<\text{Fno}\text{<}\text{7}\text{.}\text{0}$

[00005]$\text{De2}<\text{De1}.$

A camera module includes a lens module including lenses and a reflecting module disposed in front of the lens module. The reflecting module is configured to change a path of light to direct the light toward the lens module. The reflecting module includes a holder in which a reflecting member configured to change the path of the light is mounted and a first housing supporting the holder. The holder is configured to slide with respect to the first housing to enable rotation of the reflecting member with respect to a first axis and a second axis.

Provided an imaging apparatus including a first optical device, a second optical device disposed such that light transmitted through the first optical device is incident on the second optical device, and a third optical device disposed such that light transmitted through the second optical device is incident on the third optical device, wherein at least one of the first optical device, the second optical device, and the third optical device includes a plurality of nanostructures, and heights of at least two nanostructures of the plurality of nanostructures are different from each other.

A lens optical system includes a first lens group in which a first lens of an object side is composed of a meniscus lens having a negative refractive power, and having a positive refractive power as a whole, a second lens group arranged at an image side I than the first lens group, the second lens group being a focusing group for correcting a change in image distance depending on a change in object distance, being composed of two or less lenses, and having a positive refractive power as a whole, and a third lens group arranged at the image side I than the second lens group, the third lens group having a negative refractive power as a whole, in which a first lens of the image side I is composed of a concave or meniscus lens.

An electronic device is disclosed herein, including a housing having an inner space; a display disposed in the inner space and visible from an exterior, the display further including: a display panel having a first opening, at least one additional layer stacked under the display panel and having a second opening larger than the first opening, and a camera disposed in the inner space under the at least one additional layer, facing the second opening, and including: a lens housing, a plurality of lenses supported by the lens housing including a first lens closest to the display panel, and at least one image sensor, wherein the first lens either corresponds to an upper surface of the lens housing or at least partially protrudes from the upper surface of the lens housing.

A head-mountable display device for displaying an image received from a microscope comprises a first display configured to display a first image of a part of an object, the first image received from a microscope. Further, the head-mountable display device comprises a first optical arrangement located in front of the first display. The first optical arrangement comprises at least one lens. Additionally, the head-mountable display device comprises a mounting structure configured to fasten the first display to the head of a user. The head-mountable display device is configured to allow a direct line of sight from a first eye of the user to the object in a field of view of the user outside of the first display while the user is watching the first display through the first optical arrangement, if the mounting structure is fastened to the head of a user. An angle between a display direction and the direct line of sight is less than 50° and the display direction is orthogonal to the first display.

Example embodiments provide for an optical lens assembly and imaging lens with IR light filtering. The lens comprises a body having two surfaces and a plurality of layers of optical thin film layered along a direction formed on at least one surface. The optical thin films comprise less than 20 layers and thicker than 400 nm and thinner than 2000 nm thickness. Through the alternately layered layers of optical thin film, the transmittance of the lens for incident light in infrared ray band is reduced. Therefore, the infrared ray is mostly filtered without use of an additional infrared ray filter.