The present disclosure provides an optical imaging module, an optical imaging device and an electronic device. The optical imaging module includes a first lens group and a second lens group arranged in sequence from an object side to an imaging surface. The first lens group has a positive refractive power, and includes a first lens having a positive refractive power and a second lens having a negative refractive power arranged in sequence from the object side to the imaging surface. The first lens includes a convex object-side surface and a convex image-side surface. The second lens group includes a plurality of lenses with refractive power, and the plurality of lenses with refractive power include at least one movable lens configured to focus on objects to be photographed at different distances by moving along the optical axis.

An optical member driving mechanism is provided. The optical member driving mechanism includes a movable portion and a fixed portion. The movable portion includes a holder for holding an optical member with an optical axis. The movable portion is movable relative to the fixed portion. The fixed portion has a housing and a base. The housing is disposed on the base, and includes a top surface and a side surface. The top surface extends in a direction that is parallel to the optical axis. The side surface extends from an edge of the top surface in a direction that is not parallel to the optical axis. The side surface has a rectangular opening.

An optical imaging lens may include a first, a second, a third, a fourth, a fifth, a sixth, a seventh, and an eighth lens elements positioned in an order from an object side to an image side. Through designing concave and/or convex surfaces of the eight lens elements, the improved optical imaging lens may provide better imaging quality while the system length of the lens may be shortened, the F-number may be reduced, the field of view may be extended, and the image height may be increased.

An optical imaging lens may include a first, a second, a third, a fourth, a fifth, a sixth, a seventh, and an eighth lens elements positioned in an order from an object side to an image side. Through designing concave and/or convex surfaces of the eight lens elements, the improved optical imaging lens may provide better imaging quality while the system length may be shortened, the F-number may be reduced, the field of view may be extended, and the image height may be increased.

An optical diaphragm device includes: diaphragm blades each including a first fixing boss and a moving boss protruding from the other surface of a first planar plate toward a side in a second direction; light leakage prevention blades each having a second fixing boss and forming a pair with the diaphragm blade; a drive ring on which first cam grooves are formed; and a housing body capable of housing the diaphragm blades, the light leakage prevention blades, and the drive ring. A second cam groove is further formed in the light leakage prevention blade, the moving boss of the diaphragm blade is inserted into the second cam groove of the light leakage prevention blade, and is inserted into the first cam groove of the drive ring. The light leakage prevention blade has a light leakage prevention blade extending portion which extends toward the other side from the second fixing boss.

A variable diaphragm is provided. The variable diaphragm includes: first and second substrates opposite to each other; a light detector on a side of the first substrate distal to the second substrate, and configured to detect an intensity of incident light and generate a first signal; an electrowetting microfluid medium layer between the first and second substrates, and including transparent and opaque fluid mediums immiscible with each other, wherein an aperture of the variable diaphragm is formed by the transparent fluid medium, and one of the transparent and opaque fluid mediums is conductive; and a driving electrode between the first and second substrates, and configured to receive a driving voltage corresponding to the first signal and for driving the electrowetting microfluid medium layer, so as to change an area of an orthographic projection of the opaque fluid medium fluid medium on the second substrate, thereby changing a diameter of the aperture.

The imaging lens consists of, in order from the object side, a first positive lens group, a stop, a second positive lens group, and a third negative lens group. The first lens group includes a negative lens which has a concave surface on the image side, and two positive lenses which are disposed to be closer to the image side than the negative lens and which have respective convex surfaces on the object side, convex surfaces on the object side. The second lens group includes an aspheric lens, and two sets of cemented lenses disposed to be closer to the image side than the aspheric lens. The third lens group consists of one lens component.

A viewing port for sighting through a barrier includes a primary body and a secondary body engaging with a barrier aperture in the barrier. The primary body defines a first aperture. The secondary body defines a second aperture. The first aperture of the primary body is aligned with the second aperture of the secondary body defining a viewing channel between the primary body and the secondary body. The viewing channel providing a field of view through the barrier.

This invention provides a system and method for detecting and imaging specular surface defects on a specular surface that employs a knife-edge technique in which the camera aperture or an external device is set to form a physical knife-edge structure within the optical path that effectively blocks reflected rays from an illuminated specular surface of a predetermined degree of slope values and allows rays deflected at differing slopes to reach the vision system camera sensor. The light reflected from the flat part of the surface is mostly blocked by the knife-edge. Light reflecting from the sloped parts of the defects is mostly reflected into the entrance aperture. The illumination beam is angled with respect to the optical axis of the camera to provide the appropriate degree of incident angle with respect to the surface under inspection. The surface can be stationary or in relative motion with respect to the camera.

Reduction or elimination of negative consequences of reflected stray light from lens surfaces is achieved by propagating a laser beam through an eccentric pupil that excludes the optical axis of the system, which is rotationally symmetric. In such systems, stray light reflections eventually are focused onto the unique optical axis of the system, in either a real or virtual focal region. By using an eccentric pupil, all damage due to focusing of the stray light lies outside of the beam. These focal regions can, e.g., be physically blocked to eliminate beam paths that lead to optical damage, re-pulse beams and parasitic lasing.