Update: TechInsights fixed a typo in the original twit. The spatial resolution is 0.03MP, 10x lower than initially reported.
"TechInsights has begun the teardown process of #Apple iPad Pro (Model A2068). Our early findings indicate a 4.18 mm x 4.30 mm (18.0 mm²) #Sony ToF sensor with 0.03 MP resolution & 10 µm pitch pixels within the #LiDAR system. Our analysis continues with in-depth reports to follow."
iFixIt publishes a teardown video showing that LiDAR IR illumination pattern is less dense than a FaceID one:
Is the pattern static? Terrible resolution.
ReplyDeleteHigh fps sensor and tablet motion can improve that, but still surprising.
It appears static from the video.
DeleteThe only way to avoid multi path error in tof is by projecting modulated sparse rays.
DeleteOr scanning
Deletemaybe the camera is not fast enough to capture the fact that pattern is scanning
DeleteThe die size does not match up with resolution if it is a 10um pixel. Assuming 4:3 format and if it is truly 0.3MP then 640 x 480...with 10um pixel, it will not fit in a die size of 4.18 mm x 4.30 mm
ReplyDelete0.3MP with 10µm pixel size. Even with square sensor like 550X550 pixels gives an array side of 5.5X 5.5mm
ReplyDeleteReported figures of 4.18 X 4.3 mm seem pretty much Strange (either the resolution or the pixel size are not correct)
0.03 Mpixels probably. The rest of the space is ToF readout, which we all know requires tons of digital memory.
ReplyDeleteI have seen videos where the 3D meshing works great outdoors too. How does this ToF system work so well outdoors?
ReplyDeleteAny information on the transmitter elements?
ReplyDeleteThe meshing is not that good... old kinectFusion looked same or better.
ReplyDeleteLiDAR "Scanner" means that you have to scan by your hand because the spots are so sparse?
ReplyDeleteThe number of emitter array does not fit with projected dot number. So, it seems to be scanning anyway...
DeleteHow can you tell it's scanning? I think it's only measuring the distance to those dots.
DeleteThis is not him. The word "scanner" comes straight from Apple marketing:
Deletehttps://image-sensors-world.blogspot.com/2020/03/apple-releases-its-first-product-with.html
the vcsel array is duplicated using a DOE. if it does scan it must be very high speed because the points look static on the video. maybe due to aliasing.
ReplyDelete