Hi,
I came across the application report on MBMC pattern sequence mode (see http://www.ti.com/lit/an/dlpa035/dlpa035.pdf), and would like to submit a request. Here's the required info:
b) For my application, I require an exposure time of 375 microseconds. (Note that it may later be necessary to set this to 385 microseconds. I intend to trigger the MBMC patterns with an external trigger of period 375 microseconds. According to the user named PetroGelabert, the minimum trigger period to avoid buffer rotate overhead issues when using over 24 patterns is 385 microseconds: see http://e2e.ti.com/support/dlp__mems_micro-electro-mechanical_systems/f/850/t/168690.aspx . However, I have yet to observe any buffer rotate overhead issues when using an external trigger with a period of 375 microseconds. Anything below that 375 microseconds does create issues though.)
c) The table at the bottom of my post contains the MBMC pattern information sequence input (sorry about the length, but I'm trying to follow the instructions explicitly). The table contains 96 rows that defines 96 1-bit patterns that cycle between red, green, and blue LEDs.
d) The development time for this project is 2 weeks (mid-June).
e) I'm making this request for two reasons.
First, I want to perform structured light scanning (projecting light and capturing photos) with white illumination at fast rates. Currently, I'm forced to do structured light scanning using either red, green, or blue light. Fulfilling this request would enable one to perform structured light scanning with 32 different white structured light patterns by capturing one photo for every three patterns (same pattern displayed three times, but using different LEDs).
Second, I want to perform structured light scanning with color illumination at fast rates. So instead of displaying sets of three identical patterns using red, green, and blue illumination (as described in the previous paragraph), the three sequential patterns can be different.
Thanks,
Matt
| Pattern bit-depth | Number of patterns | Pattern color |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
| 1 | 1 | Red |
| 1 | 1 | Green |
| 1 | 1 | Blue |
