An optical system is provided. The optical system includes a first optical module with a first light-entering hole, a second optical module with a second light-entering hole, and a third optical module with a third light-entering hole. The second light-entering hole is close to the first light-entering hole and the third light-entering hole. The focal length of the second optical module is different from the focal length of the first optical module and the focal length of the third optical module.

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.

A camera assembly is provided. The camera assembly comprises: a frame comprising a first side wall, a second side wall facing the first side wall, and a base formed between the first side wall and the second side wall; a linear driving portion comprising a first movable member coupled to the first side wall to be able to slide and a second movable member coupled to the second side wall to be able to slide; a lens module arranged on the base, the lens module comprising at least one lens and an image sensor; a reflective member comprising a first surface onto which external light is incident and a second surface formed at a predetermined angle with the first surface so as to face the lens; and a holder on which the reflective member is disposed, the holder comprising a support portion supported on the base so as to rotate around a first rotational axis perpendicular to the optical axis of the lens and around a second rotational axis perpendicular to the optical axis and to the first rotational axis. The first movable member is connected to one side of the reflective member, with reference to the support portion, and the second movable member is connected to the other side thereof. When the first movable member and the second movable member move in the same direction, the reflective member may rotate around the first rotational axis. When the first movable member and the second movable member move in different directions, the reflective member may rotate around the second rotational axis.

A target object providing a large angular incidence range for retroreflection and a reduced amount of interfering reflections. The target object is configured to provide a 360° all-around retroreflection about a vertical axis and ±45° angular incidence range from the horizontal. According to one aspect, the target object comprises eight triple prisms arranged around the arrangement axis in such a way that their contour embeds in an octahedral shape, wherein four of the eight triple prisms are arranged to embed in a first pyramidal body and other four of the eight triple prisms are arranged to embed in a second pyramidal body. Each of the first and the second pyramidal bodies comprises a pyramid base and four lateral surfaces, wherein the pyramid bases of the first and the second pyramidal bodies are arranged parallel to each other.

An optical reflecting assembly includes a reflective member, a reflective element holder and a structure component. The reflective member includes a reflective surface for folding a light. The reflective element holder includes an assembling surface correspondingly disposed to the reflective member. The structure component is made of a metal material and has a three-dimensional structure, at least one portion of the structure component is inserted in the reflective element holder, and the structure component includes a first supporting wall, a second supporting wall and at least one extending wall. The first supporting wall and the second supporting wall are bent to form a first bending line with an angle. The extending wall and the second supporting wall are bent to form an extending bending line being a non-closed line.

An image capturing unit includes an imaging element and a dual-shot injection-molded optical folding element that are adjacent to each other. The imaging element is configured for an imaging light to pass through. The dual-shot injection-molded optical folding element includes a first part and a second part. The first part is made of transparent material. The first part has a reflective surface configured to reflect the imaging light. The second part is made of opaque material, and the second part is fixed at periphery of the first part. The second part includes a supporting portion configured to support the dual-shot injection-molded optical folding element. The supporting portion maintains the dual-shot injection-molded optical folding element at a predetermined position corresponding to the imaging element through mechanism assembly.

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.

A camera module includes: an optical path folding member configured to refract or reflect light incident along a first optical axis in a direction of a second optical axis intersecting the first optical axis; a driving assembly configured to provide driving force to rotate the optical path folding member on a plane intersecting the first optical axis; and a first ball bearing and a second ball bearing supporting the optical path folding member such that the optical path folding member is enabled to rotate on the plane. A distance from the first ball bearing to the first optical axis is less than a distance from the second ball bearing to the first optical axis.

The invention relates to a subassembly (1) for an objective (10), in particular for a long and slim optical image transmission system, for example an endoscope, an objective (10) and an optical image transmission system, as well as methods for manufacturing a subassembly and an objective. The subassembly (1) comprises a prism (2) and an aperture element (3), wherein the prism (2) and the aperture element (3) are fixedly connected to each other, preferably by means of a putty or via direct bonding.

An image compensation device and a prism carrying mechanism thereof. The prism carrying mechanism comprises a base and a pair of prism carrying members. The base comprises a base body, a light passing hole disposed at the base body, and a plurality of first sliding assembling parts integrally formed on the same side of the base body. Each of the prism carrying members comprises a carrying member body, a prism assembling part disposed at the carrying member body and corresponding to the light passing hole, and a plurality of second sliding assembling parts integrally formed on the same side of the carrying member body. The prism assembling parts of the pair of prism carrying members are oppositely and alternately disposed in an axial direction. The plurality of second sliding assembling parts are slidably assembled to the plurality of first sliding assembling parts respectively.