US 6,639,248 B2 · Light emitting and receiving device structure

Abstract

A light emitting and receiving device structure capable of compactly accommodating a light emitting element and a light receiving element and having an optical axis of an emitted beam of light in close proximity to an optical axis of a return beam of light to produce the light emitting and receiving device in a miniature size and lightweight. A one-piece structure consists of a cylindrical package having a bottom with its one end open and the other end closed with a bottom plate and a protruding pedestal member which is installed on the bottom plate of the package with its centerline concentric with the centerline of the package. The light receiving element is secured to the front end surface of the pedestal member, while the light emitting element is secured to the side face of the pedestal member, thus accommodating both devices in one package.

Claims4

Dependent claims

A light emitting and receiving device structure comprising:

a cylindrical package with a bottom, one end thereof having an opening and another end thereof being closed by a bottom plate;
and
a pedestal member concentric with a center line of the package being protrudingly disposed on said bottom plate,
wherein,
a light receiving element is secured to a front end surface of said pedestal member,
a light emitting element is secured to a side face of said pedestal member,
both said light emitting element and said light receiving element are incorporated in said package, and
a one-piece light projection and receiving lens having a light projection lens unit formed on a part of a light receiving lens unit is secured to said opening of said package.

5 more elements

Dependencies are inferred from the claim text.

Light emitting and receiving device structure

Life of this patent

Light emitting and receiving device structure

Life of this patent

Abstract

Claims4