DLP4500: DLP4500

System modelled in light tools

Hi Tanmoy,

Do you have an option to digitally  pre-process input image/data to correct for non uniformity of the final optical system?  Since brightness is not biggest care about, this will help relax constraints on optical system.  

regards,

Vivek

Hello Vivek Sir,

I can do greyscale correction.

But I am already getting a uniform illumination at dmd (uniformity of about 85- 91%) since have truncated the beam.

My real question is

The system designed as above using cylindrical lens patterns generates an uniform illumination at dmd.

But I am not using any homogenizer, so will this result in loss of image quality.

Is homogenizer an absolute necessity if i can compromise on efficiency?

Hi Tanmay,

I do have few follow-up  questions:

1. What type of illumination source you are using?

2. Where is DMD in the simulation model ?

3. Is there  a projection lens in the model or outside?

4. Cylindrical lens does allow to change the aspect ratio of light source to match with DMD. What is your criteria for image quality?

regards,

Vivek

1. What type of illumination source you are using?

LED uv monochrome CBT39 by luminus having FWHM of 130 degrees 

2. Where is DMD in the simulation model ?

The DMD is placed below the prism

3. Is there a projection lens in the model or outside?

I have simulated only illumination (nonsequential) model so the projection lens will be outside.

4. Cylindrical lens does allow to change the aspect ratio of light source to match with DMD. What is your criteria for image quality?

We are planning to directly purchase a pre-designed projection lens with mtf according to TI standards 

For us, brightness and uniformity is the biggest concern as its end use is for 3d printing, we are currently using a light engine which has a total output power of 1W and a uniformity of 90 %, we need a similar light engine. 

The image below shows the power distribution