Other Parts Discussed in Thread: DLP2010,
Hello,
I'm planning to use the DLP2000 or the DLP2010 for structured illumination in a special measurement setup (even though these these chips might not be designed for this purpose, they seem suitable for my application).
For this application it is required to project an image at a defined position within a certain sampling interval (= exposure time of a camera).
If the projected image is just "monochromic" (mirrors either "on" or "off") everything is fine. However, for intermediate values the mirrors are turned "on" and "off" for certain time interval (some sort of PWM or Delta-Sigma modulation I guess). This still does not disqualify these DLPs from being used in this particular application if I can ensure that the sampling interval is an integer multiple of the mirror flip frequency -- Otherwise I run into trouble due to aliasing.
The first thing I need to know is how fast mirror flip frequency of the DLP2000 / DLP2010 is, so I can determine possible sampling intervals and rates.
Next, I would like to know whether the individual mirrors are synchronized somehow i.e. if all mirrors are flipped "on" and "off" with a fixed frequency. Here it does not matter whether there is a delay between the individual lines or pixels as long as this delay is fixed for each line or pixel. The requirement of fixed delays comes from the fact that I need to derive a synchronization signal somehow (if there are any low price DLPs with a dedicated mirror sync output please tell me!). Since in my setup one region of the DLP will not be usable anyways, I could then derive a sync signal by permanently "displaying" an appropriate "pattern" (= color) in this section which I could detect via the combination of a laser- and a photodiode followed by a PLL or simply a discriminator and some logic in order to obtain the correct frequency and phase relation.
Thank You very much!
