Hello
I am trying to make a custom VR display from one of your DLPs. I project onto a high grade diffuser and then view the image from the otherside behind some magnifying lenses. However, I am getting a grainy image texture (as below – ignore the color artifacts caused by capture). Is it possible that this is caused by diffraction effects from the DMD?
-Brooke
Hi Vivek,
See image below for a photo of the set-up.
We are using a semi-transparent diffuser from Edmund Optics. I had trouble pasting the link here, but the product is called "80° Diffusing Angle 8" x 8" Unmounted Sheet". No gain.
Lens focal length and diameter is 40mm and 34mm, respectively. The diffuser is placed at the focal distance and the DLP is around 12cm away on the other side. We have the "engineered" surface of the diffuser facing the DLP while the polished side faces the lenses.
The illumination optics are as in the DLP3010EVM (no modifications made), focus adjusted to make the image look as sharp as possible.
You make a great point though, the image looks fine when projected onto the shiny side of the diffuser and viewed from the same side. The same can't be said with the rough side which looks blurred.
While I recognize that this is not the DLP's fault and probably out of your domain, do you have any suggestions? Has anyone else tried to use a DLP to create a near-eye display?
Brooke
