Abstract:
A method of assembling a vehicular camera includes providing a lens assembly having a base portion, a lens barrel and a plurality of optical elements in the lens barrel, and providing a circuit element having a circuit board and an imaging array. An adhesive bead is dispensed at the base portion and/or circuit element. The circuit element is placed at the base portion with the adhesive bead therebetween and the optical elements are aligned with the imaging array via a six axis robotic device when the circuit element is at the base portion and in contact with the adhesive bead. The adhesive bead is cured to a first cure level via exposure of the adhesive bead to ultraviolet light. The assembly is moved to a second curing stage and the adhesive bead is cured to a second cure level via heating the adhesive bead.
Abstract:
A vehicular camera includes a lens holder and a plurality of stacked, overlapping, board-to-board interconnected printed circuit boards that includes at least a first printed circuit board and a second printed circuit board. Circuitry disposed at the first printed circuit board is electrically connected with circuitry disposed at the second printed circuit board via board-to-board electrical connection. The circuitry disposed at the first printed circuit board includes an imaging sensor at a first side of the first printed circuit board. Pliable material is disposed between and contacts a second side of the first printed circuit board a third side of the second printed circuit board. The pliable material allows for movement between the first printed circuit board and the second printed circuit board when the plurality of printed circuit boards is being accommodated within a cavity of a rear housing during assembly of the vehicular camera.
Abstract:
An imager assembly for a vehicular camera module includes an imager circuit board and a lens holder. An imager is disposed at the imager circuit board. The lens holder includes a lens holding portion that accommodates a lens. The lens holder includes a plurality of pins extending from an attaching portion and extending in a direction away from the lens holding portion of the lens holder. With the attaching portion of the lens holder at the imager circuit board, individual pins of the plurality of pins are received at least partially through respective apertures of the imager circuit board to locate the lens holder at the imager circuit board. With the pins received at least partially through the apertures of the imager circuit board, and with the lens aligned with the imager at the imager circuit board, the pins are fixedly attached at the imager circuit board.
Abstract:
A vehicular camera includes (i) a lens barrel accommodating a lens, (ii) a lens holder having a passageway and (iii) an imager printed circuit board attached to the lens holder with the imager facing the lens. The lens barrel at least partially passes through the passageway of the lens holder when attaching the lens barrel to the lens holder. The imager printed circuit board is attached to the lens holder with the imager facing the lens and optically aligned with the lens. A biasing element urges the lens barrel in a direction outward away from the imager printed circuit board. With the imager printed circuit board attached to the lens holder, the lens barrel is fine adjustable relative to the lens holder. A rear housing attached at the lens holder to encase the imager printed circuit board.
Abstract:
A vehicular camera includes a lens barrel accommodating a lens and having at least two radial protrusions protruding radially outward at or near an inner end of the lens barrel. A lens holder includes a passageway for receiving the inner end of the lens barrel and has at least two slots extending longitudinally from a board end of the lens holder. The lens barrel is received in the lens holder and the board end of the lens holder is attached at an imager printed circuit board with the imager facing the lens. The radial protrusions are movable within the slots while the lens barrel is adjusted relative to the imager to align the lens at the imager. After the lens is aligned relative to the imager, the radial protrusions within the slots are welded to the lens holder to secure the lens barrel relative to the imager printed circuit board.
Abstract:
A vehicular camera includes a lens accommodated in a lens barrel, a lens holder that accommodates at least part of the lens holder, and a printed circuit board with an imager disposed thereat. After the lens is optically aligned with the imager, the adhesive is initially curable to an initially-cured state in an initial curing process for an initial-cure time period. The initially-cured adhesive is further curable to a further-cured state in a secondary curing process for a further-cure time period that is longer than the initial-cure time period. As further cured, the further-cured adhesive maintains optical alignment of the lens with the imager for use of the vehicular camera in a vehicle. The further-cured adhesive maintains at least 70% strength of bond after being exposed for 1000 hours to a temperature of 85 degrees Celsius and a humidity of 85% RH.
Abstract:
A vehicular camera includes a lens accommodated in a lens barrel, a lens holder that accommodates at least part of the lens holder, and a printed circuit board with an imager disposed thereat. The lens barrel is attached at the lens holder by a cured adhesive with the printed circuit board attached at the lens holder, or the printed circuit board is attached at the lens holder by a cured adhesive with the lens barrel attached at the lens holder. With the lens in focus with the imager and optically center-aligned therewith, the adhesive is initially cured to an initially-cured state in an initial curing process that includes UV light exposure for a first period of time. The initially-cured adhesive is further cured to a further-cured state in a secondary curing process that is achieved within a second period of time that is longer than the first period of time.
Abstract:
A vehicular camera includes a lens accommodated in a lens barrel, a lens holder that accommodates at least part of the lens holder, and a printed circuit board with an imager disposed thereat. The lens barrel is attached at the lens holder by a cured adhesive with the printed circuit board attached at the lens holder, or the printed circuit board is attached at the lens holder by a cured adhesive with the lens barrel attached at the lens holder. With the lens in focus with the imager and optically center-aligned therewith, the adhesive is initially cured to an initially-cured state in an initial curing process that includes UV light exposure for a first period of time. The initially-cured adhesive is further cured to a further-cured state in a secondary curing process that is achieved within a second period of time that is longer than the first period of time.
Abstract:
A vehicular camera module includes a housing and an imager assembly having an imager, an imager circuit board and a lens holder. The imager is disposed at the imager circuit board. The lens holder includes a lens holding portion and an attaching portion, with the lens holding portion accommodating a lens. The attaching portion of the lens holder includes a plurality of pins that, when the attaching portion is mated with the circuit board, are received at least partially through apertures of the imager circuit board. With the pins received at least partially through the apertures, and with the lens focused and optically aligned with the imager at the imager circuit board, the pins are soldered at the imager circuit board so as to fixedly attach the lens holder at the imager circuit board to form the imager assembly. The imager assembly is attached at the housing.
Abstract:
A process for providing a vehicular camera suitable for vehicular use includes providing a front camera housing having a lens assembly disposed thereat and providing an imager disposed on a printed circuit board. An adhesive is disposed in its uncured state between the front camera housing and the printed circuit board. The front camera housing and said printed circuit board are adjusted relative to each other to achieve optical center-alignment and focusing of the lens optics relative to the imager. The adhesive is initially cured from its uncured state to an initially-cured state in an initial radiation curing process that includes exposure to UV light for a first time period. After optical center-alignment and focusing, the adhesive is further cured from the initially-cured state to a further more cured state in a secondary curing process undertaken for a second time period that is longer than the first time period.