Abstract:
A method of operating an optoelectronic proximity sensor including a radiation-emitting component, a radiation-detecting component and a control unit includes: operating the radiation-emitting component with a pulsed current, wherein the pulsed current of the radiation-emitting component has an on time and an off time during a measurement period, and causing the control unit to evaluate a detector signal of the radiation-detecting component during the on time and ending the on time if the detector signal exceeds a threshold value, wherein the ratio of the on time to the measurement period is less than 1/10.
Abstract:
A method of operating an optoelectronic proximity sensor including a radiation-emitting component, a radiation-detecting component and a control unit includes: operating the radiation-emitting component with a pulsed current, wherein the pulsed current of the radiation-emitting component has an on time and an off time during a measurement period, and causing the control unit to evaluate a detector signal of the radiation-detecting component during the on time and ending the on time if the detector signal exceeds a threshold value, wherein the ratio of the on time to the measurement period is less than 1/10.
Abstract:
Fluctuation frequency (F) of an ambient light (S) is identified by: A) specifying first frequency (F1) and second frequency (F2), higher than said first frequency; B) measuring an optical power of the ambient light with a signal receiver (2) over a measuring time interval (Ti) during a total measuring time (T), which is shorter than or equal to a first cycle duration (P1) belonging to the first frequency; C) detecting the optical power of the ambient light in a time series over the total measuring time; D) determining at least one detection feature for identifying the fluctuation frequency by evaluating the time series; and E) identifying the fluctuation frequency of the ambient light as the first frequency or as the second frequency by means of the at least one detection feature.
Abstract:
Fluctuation frequency (F) of an ambient light (S) is identified by: A) specifying first frequency (F1) and second frequency (F2), higher than said first frequency; B) measuring an optical power of the ambient light with a signal receiver (2) over a measuring time interval (Ti) during a total measuring time (T), which is shorter than or equal to a first cycle duration (P1) belonging to the first frequency; C) detecting the optical power of the ambient light in a time series over the total measuring time; D) determining at least one detection feature for identifying the fluctuation frequency by evaluating the time series; and E) identifying the fluctuation frequency of the ambient light as the first frequency or as the second frequency using the at least one detection feature.
Abstract:
A sensor that senses a biometric function includes at least one transmitter configured to transmit electromagnetic radiation in an emission direction, including at least one receiver configured to receive electromagnetic radiation in a receiving direction, wherein the transmitter and the receiver are configured such that the emission direction of the transmitter is inclined away from the receiving direction of the receiver by a defined angle, wherein the angle is 1° to 60°.