2024-05-03 02:04 AM
As far as I know, dToF has two illumination modes. One is spot dToF (iPhone) and the other is flood illumination. Which one is VL53L8CH? Thanks.
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2024-05-03 11:33 AM
All the DToF chips from ST use a flood-type illumination. The VL53L8CH uses a VCSEL with a native output of a 27-degree cone, and a diffuser that spreads the light into a 45-degree pyramid of light.
2024-05-03 11:33 AM
All the DToF chips from ST use a flood-type illumination. The VL53L8CH uses a VCSEL with a native output of a 27-degree cone, and a diffuser that spreads the light into a 45-degree pyramid of light.
2024-05-29 01:31 AM
Sorry about late reply. Thanks for your answer. I have another question that "a VCSEL" means single VCSEL unit or a VSCEL array? Thanks.
2024-05-29 07:33 AM
Let's try to open a new topic once an answer has been accepted.
But to answer your question the Vertical Cavity Surface Emitting Laser is a chip that consists of several cells and each cell emits light. On the VL53L0, L1 and L3 there are 4 such cells. On the VL53L4 which uses a different (single stage) cell there are almost a dozen. I don't know how many cells there are on the L8 though. But the answer is one tiny chip with multiple cells on it integrated into the module.
- john