Lens holding block enabling accurate lens positioning
AssigneeSumitomo Electric Industries, Ltd.
InventorKazuhiro Tanida
Life of this patent
Estimating the term…
Abstract
A flat portion has a flat top surface, on which a chip carrier is provided. A light-emitting element is mounted on the chip carrier. A vertical portion is integral with the flat portion and extends vertically, i.e., perpendicularly to the flat top surface of the flat portion. A metal plate made of a metal having good welding performance is silver-brazed onto the vertical portion. A lens barrel containing a lens for focusing a light beam from the light-emitting element is inserted in a through-hole of the vertical portion and the metal plate, and welded to the metal plate so that the optical axes of the light-emitting element and the lens coincide with each other.
Claims12
A lens holding block on which a light-emitting element and a lens-barrel containing a lens for focusing a light beam emitted from the light-emitting element are to be mounted, comprising:
- a flat portion having a flat top surface on which the light-emitting element is to be mounted;
- a vertical portion being perpendicular to the flat top surface and integral with the flat portion and having the opening into which the lens-barrel is to be inserted, for holding the lens-barrel so that optical axes of the light-emitting element and the lens coincide with each other;
- and
- a metal plate made of a metal having good welding performance, having an opening, and fixed to the vertical portion on a side opposite to a side where the light-emitting element is to be provided so that the openings of the metal plate and the vertical portion conform to each other.
A light source unit comprising:
- a light-emitting element;
- a chip carrier on which the light-emitting element is mounted;
- a lens for focusing a light beam emitted from the light-emitting element;
- a lens-barrel containing the lens;
- a lens holding block comprising:
- a flat portion having a flat top surface on which the chip carrier is provided;
- a vertical portion being perpendicular to the flat top surface and integral with the flat portion and having an opening in which the lens-barrel is inserted, and holding the lens-barrel so that optical axes of the light-emitting element and the lens coincide with each other;
- and
- a metal plate made of a metal having good welding performance, having an opening, and fixed to the vertical portion on a side opposite to a side where the light-emitting element is to be provided so that the openings of the metal plate and the vertical portion conform to each other.
Dependencies are inferred from the claim text.