System and method for bonding camera components after adjustment

• US 20060049154A1
• Filed: 09/09/2004
• Published: 03/09/2006
• Est. Priority Date: 09/09/2004
• Status: Abandoned Application

• Current Assignee: Aptina Imaging Corporation (ON Semiconductor Corporation)
• Original Assignee: Aptina Imaging Corporation (ON Semiconductor Corporation)
• Inventors: Tella, Richard P., Clifford, George M. Jr.
• Application Number:
  US10/936,900
• Publication Number:
  US 20060049154A1
• Time in Patent Office: Days
• US Class Current: 219/121.640
• CPC Class Codes: B23K 26/244 Overlap seam welding
• CPC Class Codes: B29C 2035/0822 using IR radiation
• CPC Class Codes: B29C 65/00 Joining or sealing of preformed parts , e.g. welding of plastics materials; Apparatus therefor general aspects of processes or apparatus for joining preformed parts B29C66/00; using porous material formed by internal pressure generated therein for joining preformed parts B29C44/1228, B29C44/326
• CPC Class Codes: B29C 65/1612 Infrared [IR] radiation, e.g. by infrared lasers
• CPC Class Codes: B29C 65/1616 Near infrared radiation [NIR], e.g. by YAG lasers
• CPC Class Codes: B29C 65/1635 at least passing through one of the parts to be joined, i.e. laser transmission welding
• CPC Class Codes: B29C 65/1654 scanning at least one of the parts to be joined
• CPC Class Codes: B29C 65/1664 making use of several radiators
• CPC Class Codes: B29C 65/1674 making use of laser diodes B29C65/167 takes precedence
• CPC Class Codes: B29C 65/561 using screw-threads being integral at least to one of the parts to be joined
• CPC Class Codes: B29C 65/72 by combined operations or combined techniques, e.g. welding and stitching
• CPC Class Codes: B29C 66/21 said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
• CPC Class Codes: B29C 66/54 Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/7332 at least one of the parts to be joined being coloured
• CPC Class Codes: B29C 66/73361 at least one of the parts to be joined being opaque to visible light
• CPC Class Codes: B29C 66/73921 characterised by the materials of both parts being thermoplastics
• CPC Class Codes: B29C 66/934 by controlling or regulating the speed
• CPC Class Codes: B29C 66/939 characterised by specific speed values or ranges
• CPC Class Codes: B29C 66/949 characterised by specific time values or ranges
• CPC Class Codes: B29K 2025/00 : Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
• CPC Class Codes: B29K 2025/06 : PS, i.e. polystyrene
• CPC Class Codes: B29K 2033/08 : Polymers of acrylic acid esters, e.g. PMA, i.e. polymethylacrylate
• CPC Class Codes: B29K 2055/02 : ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• CPC Class Codes: B29K 2069/00 : Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2077/00 : Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2101/12 : Thermoplastic materials
• CPC Class Codes: B29K 2995/0027 : for light outside the visible spectrum
• CPC Class Codes: B29L 2011/00 : Optical elements, e.g. lenses, prisms
• CPC Class Codes: B29L 2011/0016 : Lenses

Abstract

Disclosed are systems and methods which utilize laser plastic welding techniques for bonding camera assembly components after their adjustment to a desired relative position. A plastic material of one camera component to be bonded is adapted to be transparent or translucent to the wavelength of light emitted by a laser, although some portion of visible light is blocked. However, a plastic material of the other camera component to be bonded is adapted to be absorptive of the wavelength of light emitted by the laser.

Claims

1. A method for bonding camera components after adjustment, said method comprising:

interfacing a first camera component and a second camera component to provide an overlapping region of contact between said first camera component and said second camera component; and

applying laser energy to at least one portion of said overlapping region.

2. The method of claim 1, wherein said interfacing comprises:

locking cam surfaces between said first camera component and said second camera component.

3. The method of claim 2, wherein said at least one portion of said overlapping region corresponds to a cam surface interface between said first camera component and said second camera component.

4. The method of claim 1, wherein said applying laser energy comprises:

applying laser energy to a plurality of portions of said overlapping region.

5. The method of claim 4, wherein said applying laser energy comprises:

using optical elements to direct a single laser beam to said plurality of portions.

6. The method of claim 1, further comprising:

adapting one of said first camera component and said second camera component to pass said laser energy at said at least one portion of said overlapping region.

7. The method of claim 6, further comprising:

adapting said one of said first camera component and said second component to block all visible light energy.

8. The method of claim 6, further comprising:

adapting the other one of said first camera component and said second camera component to absorb said laser energy at said at least one portion of said overlapping region.

9. The method of claim 1, further comprising:

providing a welding well at said at least one portion of said overlapping region, said welding well providing a thin wall at an interface between said first camera component and said second camera component.

10. The method of claim 1, further comprising:

applying a bonding mechanism in addition to a weld resulting from said laser energy.

11. A system for bonding camera components after adjustment, said system comprising:

a first interface surface of a first camera component;

a second interface surface of a second camera component, wherein said first interface surface and said second interface surface are adapted to provide an overlapping region of contact between said first interface surface and said second interface surface when said first camera component and said second camera component are interfaced; and

a laser energy delivery system delivering laser energy to at least one portion of said overlapping region.

12. The system of claim 11, wherein said first interface surface and said second interface surface comprise corresponding threaded surfaces.

13. The system of claim 11, wherein said first interface surface and said second interface surface comprise smooth surfaces.

14. The system of claim 11, wherein said first interface surface and said second interface surface comprise corresponding cam surfaces.

15. The system of claim 11, wherein said first camera component comprises one of a lens holder and a housing and said second camera component comprises the other one of said lens holder and said housing.

16. The system of claim 11, wherein said first camera component and said second camera component are opaque with respect to visible light.

17. The system of claim 16, wherein one of said first camera component and said second camera component is at least translucent with respect to said laser energy.

18. The system of claim 11, further comprising:

a welding well disposed in a surface of said first camera component opposite said first interface surface, said welding well presenting a thin walled portion of said first camera component at said at least one portion of said overlapping region.

19. The system of claim 11, wherein said first camera component and said second camera component are comprised of polycarbonate.

20. The system of claim 11, wherein said laser energy delivery system comprises:

a laser; and

an optical system to direct a laser beam emitted by said laser at a plurality of portions of said overlapping region.

21. The system of claim 20, wherein said laser comprises an infra-red laser.

22. The system of claim 20, wherein said optical system comprises a beam splitter.

23. The system of claim 20, wherein said optical system comprises a laser beam scanner.

24. The system of claim 11, wherein said laser energy delivery system comprises:

a plurality of lasers.

25. A method for laser welding optical system components, said method comprising:

selecting a material of a first component to be opaque with respect to visible light, said selected material of said first component also being at least translucent with respect to laser light used in said laser welding;

selecting a material of a second component to be compatible for welded bonding with said material of said first component, said selected material of said second component also being absorptive with respect to laser light used in said laser welding;

interfacing said first component and said second component to provide an overlapping region; and

shining said laser light through said material of said first component onto said material of said second component to weld said first component to said second component at said overlapping region.

26. The method of claim 25, wherein said material of said first component and said material of said second component are comprised of a same base polymer.

27. The method of claim 26, wherein said material of said second component comprises an opacifying agent.

28. The method of claim 27, wherein said opacifying agent comprises carbon added to said base polymer in sufficient quantity to be absorptive with respect to said laser light.