Lens assembly, optical unit and electronic device

A lens assembly, having an optical path, and the lens assembly comprising:

• a reflection component, having an optical portion and a V-shaped groove, wherein the optical path passes through the optical portion, the V-shaped groove has two light-blocking surfaces and a plurality of curved protrusions, the two light-blocking surfaces are gradually spaced apart from each other from the optical portion along a direction away from the optical path, and the plurality of curved protrusions are sequentially arranged and are connected to the two light-blocking surfaces;
• and
• a light-blocking membrane layer, coated on the plurality of curved protrusions and at least one of the two light-blocking surfaces of the V-shaped groove of the reflection component and adjacent to the optical portion, and the light-blocking membrane layer having:
• a distal side;
• and
• a proximal side, located closer to the optical portion than the distal side, and the proximal side comprising:
• two extension structures, disposed at a side of the V-shaped groove close to the optical path and extending along a direction away from the distal side, wherein the two extension structures are not overlapped with each other in a direction in parallel with the optical path;
• and
• a recessed structure, connected to the two extension structures and recessed along a direction towards the distal side;
• wherein the two extension structures and the recessed structure are formed by coating the light-blocking membrane layer on the plurality of curved protrusions.