VCSELs Offer Homogeneous Illumination for Facial Recognition

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OSRAM expands its laser-light-source offerings with two new Vertical Cavity Surface Emitting Lasers (VCSELs) to open up numerous applications such as 3D imaging and 3D scanning 

Osram Opto Semiconductors has unveiled the PLPVCQ 850 and the PLPVCQ 940, the latest additions to its Bidos product family. Applications for the new Vertical Cavity Surface Emitting Lasers (VCSELs) include machine vision or facial recognition, as well as object or architectural scanning that involves mapping an area in 3D and positioning virtual furniture and other items. The application helps save time and money when designing spaces, according to the firm.

Applications and Advantages of VCSELs

As explained by OSRAM, VCSELs combine the high power density and simple packaging of an IRED with the spectral width and speed of a laser. Unlike laser diodes, VCSELs and are much less sensitive to temperature fluctuations. One of the most familiar applications for the technology is facial recognition for mobile devices. VCSELs illuminate the face with infrared light for cameras. The image captured by the camera is then compared to the image stored on the device. If they match, the device is unlocked.

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These 3D sensing applications can now make use of PLPVCQ 850 and PLPVCQ 940 for Time of Flight (ToF) measurements.

Two new VCSELs for the 3D sensing market

The new VCSELs come with a compact black package measuring only 2.40 mm x 3.30 mm x 1.20 mm. Depending on the application, the customer can select the 2 W component with the appropriate wavelength – either 850 nm (PLPVCQ 850) or 940 nm (PLPVCQ 940).

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The infrared beam is formed with the aid of a special micro lens array to achieve exceptionally homogeneous illumination of the field of view (FOV), the company claimed.

Another benefit of the VCSEL chip from the Osram subsidiary Vixar is the ease of installation.

“We are delighted to add these highly innovative products to our VCSEL family. With these products we are setting new standards in emerging applications such as 3D sensing, and with our know-how we are looking to gain significant influence in this market”, said Nina Reiser, Marketing Manager at Osram Opto Semiconductors.

BIDOS – PLPVQ 940 Product Features

  • Wavelength: 940 nm
  • Maximum efficiency: 27 percent and an output of 300 mW
  • Two bond wires supply the laser diode uniformly and rapidly with  energy
  • The angle within which BIDOS provides illumination is 65° x 78°
  • Package size: 1.9 mm x 2.20 mm x 0.85 mm

Availability

The two new products will be available in the first half of 2019. For more information on VCSELs, click here.

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