Use Case

Application

3D object recognition for environmental mapping and gesture detection

Challenge

High performance with low number of pixels

Expertise in Optical Sensor Interface ICs

Performance

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

Robustness

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

Flexibility

  • 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

 

FAQ

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.

Characteristics

LEDVCSELEEL
PowerLow (Need min. 4 LEDs)MidHigh
RangeMid (with 4 LEDs)MidHigh
CostLowMid

High

Emission characteristicsSpotSquareSpot (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 nm940 nm

Characteristics

- Visible for human eyes
- Higher sensitivity

-  Not visible for human eyes
- Lower sensitivity

Applications

- 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

 

 

Contact

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

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