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US 8,559,020 B2Granted
Optoelectronic component and light sensor having same
AssigneeSick AG
InventorGerhard Merettig
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AssigneeSick AG
InventorGerhard Merettig
Estimating the term…
The invention relates to an optoelectronic component for the positional determination of an incident light beam in a longitudinal axis direction, having flat sides, longitudinal sides and two oppositely disposed end sides, having a low ohmic first contact layer at a first flat side for a first electric contact (cathode) and having at least two low ohmic second contact layers along the end sides for second contacts (anodes). The invention additionally relates to a light sensor having such a component. To provide an improved optoelectronic component for the positional determination of an incident light beam as well as to provide an improved light sensor having such an optoelectronic component, it is proposed that at least one of the second contact layers not only extends along the end side but also over part sections along a second and third long side longitudinal side.
An optoelectronic component having a longitudinal axis and being configured for the determination of the position of incidence of an incident light beam along the longitudinal axis, the optoelectronic component further having a photodiode structure with first and second opposed flat sides, third and fourth opposed longitudinal sides and fifth and sixth opposed end sides, having a first low ohmic contact layer at the first flat side for a first electric contact to the photodiode structure and having at least second and third low ohmic contact layers along the fifth and sixth end sides for second contacts to the photodiode structure, wherein at least one of the second and third contact layers not only extends along the respective end side, but also has part sections which extend partly along said third and fourth longitudinal sides, the part sections also having contact to the photodiode structure.
A light sensor having a light transmitter and an optical light reception system in a triangulation arrangement, the light sensor further having a light receiver which includes an optoelectronic component, the optoelectronic component having a longitudinal axis, having a photodiode structure with first and second opposed flat sides, third and fourth opposed longitudinal sides and fifth and sixth opposed end sides, having a first low ohmic contact layer at the first flat side for a first electric contact to the photodiode structure and having at least second and third low ohmic contact layers along the fifth and sixth end sides for second contacts to the photodiode structure, wherein at least one of the second and third contact layers not only extends along the respective end side, but also has part sections which extend partly along said third and fourth longitudinal sides, the part sections also having contact to the photodiode structure, the light sensor also having an evaluation unit for determining the distance of the object from the light sensor from a position of incidence of a light beam reflected by the object on the longitudinal axis of the optoelectronic component.
Dependencies are inferred from the claim text.