TechInsights publishes a teardown of Intel RealSense L515 LiDAR:
"The Intel RealSense L515 is rated for indoor use and can provide depth measurements between 0.25 m and 9 m with a field of view of 70° x 55°. Its LiDAR unit consists of an IR (860 nm) laser reflecting off a scanning MEMS mirror, coupled with an IR photodiode. It is also fitted with an RGB camera which provides a 1080p resolution at 30 fps.
The RealSense L515 is housed in a compact and lightweight “hockey puck” enclosure (61 mm x 26 mm / 100 grams), which makes it ideal for robotics applications, as it can be more easily incorporated into a product."
What is the purpose of the strange, but nice shape of the metal in 4th figure ?
ReplyDeleteThat is the scanning MEMS mirror.
ReplyDeleteLooks like ST logo inthe 4th figure
ReplyDeleteOf course this is ST. ThechInsights writes:
Delete"TechInsights was able to remove an intact STMicroelectronics PM56A die from the laser scanning module. The die is measured at 3.53 mm x 2.8 mm.
Compared to its predecessor the PM54A, analyzed by TechInsights, the mirror found in the Intel RealSense L515 does not have a static frame, rather all static parts (such as PADs, routing metals, anchors) are inside the maximum in-plane extension defined by the Lorentz coil. This solution allows to have a more compact design, despite the high Field of View reported by Intel of 70° x 55°."
Only one mirror? Does this mean it has a array of photodiodes?
ReplyDeleteCould that MEMS mirror be capable of scanning in 2 axes?
DeleteOnly one photodiode cover all FOV.They use something like fisheye lense.
DeleteYes 2 axis mirror
ReplyDeleteCool, but how? I would love to read more about those fast MEMS
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