ToF Imager

Together with a dedicated optic the sensor device allows to build a Time-of-Flight (ToF) camera which is capable of measuring absolute spatial distance. The device controls a laser-diode or LED sending short pulses of IR light. An integrated array of purpose-designed photo diodes detects the radiation reflected by an object. From the digital data provided by the sensor device the distance information can be derived by a dedicated software algorithm. Laser- and LED-illumination are equally supported.



  • 3D object recognition
  • Gestures in interior & exterior
  • Cliff detection


  • Low power consumption
  • High resolution with few pixel

Use Case


3D object recognition for environmental mapping and gesture detection


High performance with low number of pixels

Expertise in Optical Sensor Interface ICs


  • 3D information enables object classification in real time
  • Good cost/perfomance ratio
  • High sensitivity
  • Low power consumption


  • Automotive qualified (AEC-Q100)
  • On board temperature sensor for temperature compensation
  • High ambient light immunity
  • Robust against humidity
  • Distance information in all lighting conditions


  • Usable with a variety of emitters (EEL, VCSEL, LED) with wavelengths from 850 to 940 nm
  • Lightsource programmable on-chip
  • Small and lightweight
  • Easy calibration

Our Solution

About – E527.31 ToF Imager

Our indirect ToF solution can capture 3D maps in both indoor and outdoor environments. Objects such as hands and feet can be detected with a high recognition rate, allowing very reliable and intuitive gesture recognition to be realized with suitable algorithms.

Advantages / USPs

  • High ambient light immunity
  • Low power consumption
  • Two different operation Modes (Sleep Mode and Full Operation Mode)
  • Low data rate
  • Automotive qualified
  • Cost-effective standard CMOS process

Comparison of E527.31 vs. competitor’s approach

Elmos: Simple 3D ToF Imager
with high performancer

Competitor: Absolute Measurement

+ Small number of pixels ensures data transmission with simple standard BUS systems
+ Despite the low resolution, many applications
can be realized without limitations and for a cost-efficient price
+ Easy calibration (additional pixel for optical alignment available
+ Optimized BOM list
– Large FoV only possible with low resolution

+ High Resolution
– High data rate
– High BOM cost



Which lightsources can be used with E527.31?

All pulsed light sources can be used as emitters (Edge-emitting laser, LEDs, VCSELs)

What is the difference between the different lightsources?

The choice of light source depends mainly on the application
If high ranges must be achieved and eye safety is not required an EEL should be used.
LEDs or VCSELs should be used to protect the eyes. Here the price is the decisive factor.
Although VCSELs are more expensive, they also provide the better emission characteristics for our sensor.


Power Low (Need min. 4 LEDs) Mid High
Range Mid (with 4 LEDs) Mid High
Cost Low Mid


Emission characteristics Spot Square Spot (Diffraction foil or lens needed)

Which wavelength should be used?

The choice of wavelength depends mainly on the application
Applications where the user looks directly into the light source, it is better to use wavelengths of 940 nm!
Applications where the user is not looking directly into the light source, it is better to use wavelengths of 850 nm due to the higher sensitivity of the pixel!


850 nm 940 nm


- Visible for human eyes
- Higher sensitivity

-  Not visible for human eyes
- Lower sensitivity


- Easy Open Liftgate (Trunk Opener)
- Over head console
- Automatic Doors  

- Infotainment
- Automatic Doors

Do I need a lens in front of the emitter?

It depends on the choice of light source. An EEL requires a lens or a diffractive foil. With VCSELs and LEDs, an optical system is often already integrated.

Do I need a lens in front of the sensor?

A lens in front of the sensor is absolutely necessary. Both standard lenses (usually high installation height) and customized lens systems (lower installation height) can be used here




If you have any questions, don't hesitate to contact us