CN-224216940-U - Optical imaging system, camera module and electronic equipment

CN224216940UCN 224216940 UCN224216940 UCN 224216940UCN-224216940-U

Abstract

The utility model relates to the technical field of optical imaging, and discloses an optical imaging system, an imaging module and electronic equipment, which comprise a lens assembly, an imaging assembly and a prism assembly, wherein the prism assembly is provided with an incident surface and an emergent surface which are positioned on the same side, the lens assembly faces the incident surface, the imaging assembly faces the emergent surface, a stray light improving area for improving stray light is formed on the prism assembly, and light is reflected in the prism assembly for multiple times after being emitted to the incident surface from the lens assembly and is reflected to the emergent surface after passing through the stray light improving area. According to the utility model, the stray light improving area is arranged, and the light blocking area is formed in the prism, so that the light path emitted to the outside of the working surface is diffusely reflected, the continuous reflection intensity of an invalid light path is effectively reduced, the generation of stray light, ghost images and glare is reduced, and the imaging quality is improved.

Inventors

Xu Ganzhou
ZHANG HAO
DU KAIWEN
ZHOU YIYUAN
XIE YUZUO
BAO ZHAOHAN

Assignees

盛泰光电科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250616

Claims (10)

1. The optical imaging system comprises a lens assembly, an imaging assembly and a prism assembly, and is characterized in that the prism assembly is provided with an incident surface and an emergent surface which are positioned on the same side, the lens assembly is opposite to the incident surface, the imaging assembly is opposite to the emergent surface, a stray light improving area for improving stray light is formed on the prism assembly, and light is reflected in the prism assembly for multiple times after being emitted to the incident surface from the lens assembly and is reflected to the emergent surface after passing through the stray light improving area.
2. The optical imaging system according to claim 1, wherein the light enters the prism assembly from the incident surface from each direction and is reflected to form a plurality of different light paths, the light paths are respectively configured into a first light path and a second light path corresponding to two sides of the imaging assembly, the first light path and the second light path formed in the prism assembly overlap and intersect to form an intersection point area, and the stray light improving area is correspondingly arranged at the intersection point area.
3. The optical imaging system of claim 2, wherein the prism assembly has a first reflecting surface, a second reflecting surface and a third reflecting surface, the second reflecting surface is located between and on the same side as the incident surface and the exit surface, and external light enters the prism assembly from the incident surface and sequentially irradiates the first reflecting surface, the stray light improving area, the second reflecting surface and the third reflecting surface and then emits from the exit surface, or external light enters the prism assembly from the incident surface and sequentially irradiates the first reflecting surface, the second reflecting surface, the stray light improving area and the third reflecting surface and then emits from the exit surface.
4. The optical imaging system according to claim 2 or 3, wherein the prism assembly comprises a first prism in a right trapezoid shape and a second prism in a right trapezoid shape, right-angle faces of the first prism and the second prism corresponding to the right angles are in glued connection to form the stray light improving area, the stray light improving area comprises a silk-screen area for shielding stray light and a light-transmitting area for allowing light to pass through and complementarily distributing with the silk-screen area, and a continuous wavy boundary line for forming diffuse reflection of light is formed between the silk-screen area and the light-transmitting area.
5. The optical imaging system of claim 4, wherein the silk-screened area is U-shaped and comprises a full shielding section shielding the bottom of the right angle surface and half shielding sections shielding two sides of the right angle surface from two sides of the full shielding section to the top, the light-transmitting area is positioned between the two half shielding sections, and the boundary line between the light-transmitting area and the full shielding section corresponds to the lowest point of the intersection point area.
6. The optical imaging system of claim 4, wherein said boundary line is formed by alternating and staggered connection of a plurality of arcs having a radius of 0.05 mm.
7. The optical imaging system according to claim 4, wherein the prism assembly comprises a third prism having a bottom surface on a side thereof facing away from the incident surface and the exit surface, the stray light improving region comprises a first light blocking groove concavely provided on the bottom surface and extending to the intersection region, and a second light blocking groove concavely provided on both sides of the third prism and offset from the first light blocking groove, the first light blocking groove has a first converging side on which a plurality of continuous first wave structures for forming diffuse reflection of light are formed, and the first converging side corresponds to a lowest point of the intersection region, and an intersection line for forming diffuse reflection of light in a continuous wave shape is formed between the silk-screen region and the light transmitting region.
8. The optical imaging system according to claim 7, wherein the stray light improving area further includes a third light blocking groove and a fourth light blocking groove formed on the bottom surface and disposed on both sides of the first light blocking groove along the optical path, and a plurality of continuous second wave structures for diffusely reflecting light are formed on the third light blocking groove and/or the fourth light blocking groove.
9. The camera shooting module is characterized by comprising a support, an anti-shake motor, the lens assembly, the imaging assembly and the prism assembly, wherein the lens assembly, the imaging assembly and the prism assembly are according to any one of claims 1 to 8, a mounting surface is arranged on the support, a mounting groove is concavely formed in the mounting surface, the prism assembly is arranged in the mounting groove, the anti-shake motor is arranged on one side of the mounting surface and faces the incident surface, the imaging assembly is arranged on the other side of the mounting surface and faces the emergent surface, and the lens assembly is arranged on the anti-shake motor.
10. An electronic device comprising an optical imaging system as claimed in any one of claims 1 to 8.

Description

Optical imaging system, camera module and electronic equipment Technical Field The present utility model relates to the field of optical imaging technologies, and in particular, to an optical imaging system, a camera module, and an electronic device. Background The optical imaging system is an instrument based on the refraction principle of light, and collects and focuses light of an object to a point through a lens to form a clear image, so that the optical imaging system is often applied to the fields of various camera modules, microscopes, various industrial detection and the like. The optical imaging system of the camera module mainly comprises a lens assembly, a prism assembly and an image sensor, scenery light rays are precisely focused on the image sensor through refraction by virtue of a lens combination in the lens assembly to form an inverted real image, and the image sensor converts light signals into point signals to generate an image. The prism component is used as a core element in an optical imaging system, and precisely turns or splits a light path when in action, is often used for changing the direction of light rays in a periscope lens to realize long-focus compression, and can participate in color separation or polarization treatment. However, since the prism has a plurality of air-glass interfaces including an incident surface and an exit surface, even if an antireflection film is coated on the surface of the prism assembly, residual reflected light is still generated at the edge of the prism assembly, and ghosts are formed by reflection and refraction inside the prism assembly, and if the total reflection failure is caused by film coating defects, pollution or angle deviation, the total reflection inclined surface directly generates penetrating stray light. In addition, the scattering of ambient stray light on the non-working surface of the prism assembly and the newly added complex reflection path after the folding of the optical path can lead imaging light to more easily invade the sensor, and cause glare spots or contrast reduction which are difficult to predict. Disclosure of utility model Aiming at the defects of the prior art, the utility model aims to provide an optical imaging system, an imaging module and electronic equipment to solve the problem that a prism assembly is reflected by light to cause a large amount of stray light. In order to solve the technical problems, the technical scheme includes that the optical imaging system comprises a lens assembly, an imaging assembly and a prism assembly, wherein the prism assembly is provided with an incident surface and an emergent surface which are positioned on the same side, the lens assembly faces the incident surface, the imaging assembly faces the emergent surface, a stray light improving area for improving stray light is formed on the prism assembly, and light is reflected in the prism assembly for multiple times after being emitted to the incident surface from the lens assembly and is reflected to the emergent surface after passing through the stray light improving area. Further, light enters the prism assembly from the incident surface from all directions and then is reflected to form a plurality of different light paths, the light paths are respectively configured into a first light path and a second light path corresponding to two sides of the imaging assembly, the first light path and the second light path formed in the prism assembly are overlapped and intersected to form an intersection point area, and the stray light improving area is correspondingly arranged at the intersection point area. Further, the prism assembly is provided with a first reflecting surface, a second reflecting surface and a third reflecting surface, the second reflecting surface is positioned between the incident surface and the emergent surface and is on the same side with the incident surface, external light enters the prism assembly from the incident surface and then sequentially irradiates the first reflecting surface, the stray light improving area, the second reflecting surface and the third reflecting surface and then emits from the emergent surface, or external light enters the prism assembly from the incident surface and then sequentially irradiates the first reflecting surface, the second reflecting surface, the stray light improving area and the third reflecting surface and then emits from the emergent surface. Further, the prism assembly comprises a first prism in a right trapezoid shape and a second prism in a right trapezoid shape, right-angle faces, corresponding to right angles, of the first prism and the second prism are connected in a gluing mode to form a stray light improving area, the stray light improving area comprises a silk-screen area for shielding stray light and a light-transmitting area for allowing light to pass through and complementarily distributing with the silk-screen area, and a continuous wavy boundary line fo