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LiDAR LiDAR

LiDAR

 

LiDAR, which stands for Light Detection and Ranging, is a remote sensing method that measures distance by emitting laser light to a target and measuring its reflection with a sensor. LiDAR is increasingly important in applications such as automotive ADAS (Advanced Driver Assistance Systems), Automated guided vehicle (AGV) and range finding.

Pulsed laser diodes and detectors are employed in LiDAR.

We offer a variety of high-sensitivity photodetectors that can be used for short-, mid-, and long-range detection by ADAS and autonomous vehicles. These include silicon PIN photodiodes, silicon and InGaAs avalanche photodiodes (APD), silicon photomultipliers (SiPM or MPPC), and CMOS distance image sensors.

We also offer custom specific products such as APD arrays integrated wigh Trans impedance Amplifier, to support the specific requirements of different systems.

 

 

 

Comparison table

Parameter MPPC® APD PIN photodiode
Range Long Middle Short
Accuracy High High High
Readout circuit Simple Complex Complex
Operation voltage to several tens of V 100 to 200 V to 10 V
Gain 105 10 to 100 1
Temperature sensitivity Middle High Low
Response time Fast Medium Medium
Ambient light immunity Medium Medium High
Array Suitable Suitable Suitable
Gap Narrow Wide Wide
Uniformity Good Depends on the size Good

Recommended products

Si photodiode

Basic detector for rangefinders. Suitable for short-range measurement or use under bright light. It is affordably priced and features low-voltage operation. With a high-speed response of 500 MHz, it can measure from the visible range up to 1000 nm. JEDEC level: 2a.

Si APD

Si APD can measure longer distances than Si PIN photodiodes since it has high sensitivity for long wavelength of up to 900 nm. We also offer APD with a band-pass filter that decreases effect of background light, thereby supporting longer measurement distance at a higher accuracy.

MPPC

MPPC is a device having multiple APD pixels operating in Geiger mode. Its excellent sensitivity enabling detection of extremely weak light at photon counting level is suitable for long range measurements.

PLD

The laser diodes operated at the peak emission wavelength of 905 nm feature high-peak power under pulsed operation. Various types are available, with different peak output powers and emission widths.

Distance image sensors

The S1196x series are image sensors capable of detecting distance to an object using the time-of-flight (TOF) method. They are available as linear and area image sensor types. Depending on the combination of the light source and the detector, point-by-point scanning is not necessary. They are optimized for measurements of relatively short distances.

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