There is provided herein an optical system for a tip section of a multi-sensor endoscope, the system comprising: a front-pointing camera sensor; a front objective lens system; a side-pointing camera sensor; and a side objective lens system, wherein at least one of said front and side objective lens systems comprises a front and a rear sub-systems separated by a stop diaphragm, said front sub-system comprises, in order from the object side, a first front negative lens and a second front positive lens, said rear sub-system comprises, in order from the object side, a first rear positive lens, an achromatic sub-assembly comprising a second rear positive lens and a third rear negative lens, wherein the following condition is satisfied: f.sub.(first rear positive lens)≤1.8f, where f is the composite focal length of the total lens system and f.sub.(first rear positive lens) is the focal length of said first rear positive lens.

Misalignment of a substrate portion which integrates an image sensor and a substrate is suppressed. An imaging apparatus comprises: an imaging optical system including at least one optical element; a holding member holding the imaging optical system; an image sensor configured to capture a subject image formed by the imaging optical system; a substrate having the image sensor mounted thereon; and a bonding member fixing a substrate portion to the holding member, the substrate portion integrating the image sensor and the substrate, wherein the bonding member is partly in contact with a surface of the substrate portion, and at at least two positions in a part of the surface of the substrate portion in contact with the bonding member, the surface of the substrate portion faces different directions.

The present disclosure provides an imaging lens assembly module including a baseplate and an imaging lens assembly. The imaging lens assembly includes an imaging lens set and a barrel. The imaging lens set includes at least one lens element. The at least one lens element includes two first trimmed surfaces. The barrel includes a barrel portion and a base portion. The barrel portion has a first inner surface, and the barrel portion includes two second trimmed surfaces. The barrel portion and the base portion are formed integrally, a shortest distance is defined between the first trimmed surfaces of the lens element, a shortest distance is defined between the second trimmed surfaces of the barrel portion, and the optical axis passes vertically through the shortest distance between the first trimmed surfaces and the shortest distance between the second trimmed surfaces.

A driving mechanism is provided, including a base, a movable module, and a driving assembly. The movable module has a movable member and a connecting member connected to the movable member. The driving assembly is connected to the base and the connecting member. The driving assembly has a driving element that generates a driving force to the connecting member and the movable member, so that the movable module moves relative to the base.

A camera module is provided. The camera module includes a housing, and a first lens module and a second lens module disposed in the housing and individually movable in an optical axis direction, the first and second lens modules being configured to generate rolling friction on one of both sides of each of the first and second lens modules and sliding friction on the other of both sides when the first and second lens modules are moved.

A plenoptic endoscope includes a fiber bundle with a distal end configured to receive light from a target imaging region, a sensor end disposed opposite the distal end, and a plurality of fiber optic strands each extending from the distal end to the sensor end. The plenoptic endoscope also includes an image sensor coupled to the sensor end of the fiber bundle, and a plurality of microlenses disposed between the image sensor and the sensor end of the fiber bundle, the plurality of microlens elements forming an array that receives light from one or more of the plurality of fiber optic strands of the fiber bundle and directs the light onto the image sensor. The plurality of microlens elements and the image sensor together form a plenoptic camera configured to capture information about a light field emanating from the target imaging region.

An imaging lens assembly has an optical axis, and includes at least one radial reduction lens element and a light blocking element. The radial reduction lens element includes an effective optical portion and a peripheral portion. The effective optical portion includes a reduction part shrinking from a portion of the effective optical portion towards the optical axis so that the effective optical portion is non-circular. The peripheral portion and the reduction part are disposed at interval. The light blocking element includes a receiving structure and an extending light blocking structure. The extending light blocking structure and the receiving structure are disposed at interval, and the extending light blocking structure is connected to the receiving structure so that the effective optical portion is non-circular.

A lens apparatus includes zoom lens units configured to move in an optical axis direction for zooming, and a correction lens unit configured to move in the optical axis direction to correct change in a focal position due to change in an atmospheric pressure. The lens apparatus satisfies an inequality 0.4<|fair_t/fw|<6 where fair_t is a composite focal length of an air lens included in one of the zoom lens units having a smallest absolute value of the composite focal length among the zoom lens units and fw is a focal length of the lens apparatus at a wide-angle end.

The light emitting assembly includes a substrate (1), a laser light source array, and a lens array. The laser light source array is disposed on the substrate (1), the lens array is disposed on a light emitting side of the laser light source array, one lens (3) in the lens array is disposed opposite to at least one laser light source (2) in the laser light source array, a light emitting surface of the lens (3) is a spherical surface, and at least some laser light sources (2) are eccentrically arranged with corresponding lenses (3). In a manufacturing process, lenses (3) of a same structure and laser light sources (2) of a same structure are used, and eccentric distances between the laser light sources (2) and the lenses (3) are changed, so that light emitting assemblies with different divergence angles can be prepared.

Provided is a prism device applied to a periscope lens module, including a bearing frame, a supporting-restoring assembly, a prism, and shape memory alloy wires. The shape memory alloy wires include first to fourth shape memory alloy wires. The first shape memory alloy wire and the second shape memory alloy wire are configured to drive the supporting-restoring assembly to drive the prism to rotate about a first rotation center axis. The third shape memory alloy wire and the fourth shape memory alloy wire are used to drive the supporting-restoring assembly to drive the prism to rotate about a second rotation center axis. The first rotation center axis is perpendicular to the second rotation center axis. The solutions of the present invention enable the prism to rotate towards two central axes that are perpendicular to each other, and has high stability and a simple structure, thereby achieving miniaturization.