Patent ID: 8587718

Claim:
A manufacturing method for an image pickup unit which includes: a circuit board, a solid-state image pickup device disposed on a back side of the circuit board such that a light receiving unit arranged to the solid-state image pickup device faces forward, an objective lens which has a plurality of legs extending toward the solid-state image pickup device, and a lens barrel which holds the objective lens and has a flat tapered surface formed on at least a part of a proximal end of the lens barrel, the proximal end of the lens barrel being spaced with a predetermined distance from a front part of the solid-state image pickup device and the circuit board and opposing the front part of the solid-state image pickup device and the circuit board without contact, so that a distance between the flat tapered surface and the circuit board increases toward the outer circumference of the lens barrel, the manufacturing method comprising the steps of: applying a first light-curing adhesive to an end face of each of the plurality of legs of the objective lens which opposes the solid-state image pickup device; mounting the objective lens together with the lens barrel by abutting the end face of each of the plurality of legs of the objective lens against the solid-state image pickup device; directing a first beam at the end face of each of the plurality of legs in a direction along the tapered surface to cure the first light-curing adhesive so that the first beam is passed through the space between the front part of the solid-state image pickup device and the circuit board and the proximal end of the lens barrel, and after the directing of the first beam is complete, applying a second light-curing adhesive between the circuit board and the proximal end of the lens barrel, and directing a second beam to cure the second light-curing adhesive therebetween from an outer circumferential side of the lens barrel.