I'm planning to change lightcrafter optics and use a 405nm 500mW source; we know this is outside TI specification ( >420nm ), but some test we did with pico projector worked fine in our application. What kind of problem should arise, perhaps shorter lifetime? Or will be available a "uv-graded" DLP sized like DLP3000?
Welcome to the TI DLP&MEMS e2e forum.
You are correct - the usage you propose is outside the specifications for the DLP3000 DMD device. The result will be shortened operational lifetime of the DMD. Use of the DLP3000 under these conditions is at your own risk. However, if it works for you, that is great.
There are no plans at this time for a UV rated DLP3000.
We are interested in your application and your experience with this project.
Thank you for your reply. My question now is if you have some extimation of lifetime in this working condition... Using DLP Discovery 4100 XGA, the closest uv rated device, may be too expensive for our application.
I hope all is well. My name is Justin Lemon and I am a Technical Support Consultant at Digital Light Innovations. I just came across your post so I wanted to contact you to see if I could help clarify this for you. I just consulted with one of our Engineers and they said if you use a light source that gives off a higher power density than the TI specifications (in your case you are only going with a light source that is outside the TI specification by about 80 mW), it will degrade the overall life of the DMD. To elaborate, it's not like the DMD will just completely fail and stop working all of a sudden. Instead, you will start getting stuck pixels in the middle and outsides of the DMD. Those mirrors will start showing stuck black and white pixels, so when you start seeing that, you will know the DMD is starting to degrade.
But if you absolutely need to run a higher power density than recommended by TI, once the DMD starts degrading, you can always purchase another DMD by itself and just replace it. I know you would be spending more money, but if you need to do so to continue your project, experiment, etc. that is what you are looking at. In regards to the "UV graded" DLP sized chip, let me do some more research and I will get back with you as soon as possible.
In the meantime, if you have any questions or need anything, please do not hesitate to contact me directly. I included my contact information at the bottom. I will get back with you shortly once I have some more answers for you.
Technical Support Consultant
Digital Light Innovations
DIGITAL LIGHT innovations
I just saw that Pascal kindly answered your question regarding the D3000 UV DMD. You are correct about the DLP Discovery 4100 XGA Kit having the closest uv rating you can find. You mention that it is too expensive for your application so I wanted to see what kind of budget you're working with and what you consider "too expensive." I ask because we also sell the Discovery Kits and we can always send you a quote so you can get a better idea of the cost as well as what all comes with the D4100 XGA UV Kit. I can also send over a very informative brochure on the D4100. It lists your various kit options, as well as a detailed explanation of the included items and advantages the D4100 will give you that will not be able to find with any other DLP-based technology or kit.
If you could kindly send over your email address, I can send over the D4100 Brochure as well as a Wavelength Efficiency Chart that shows the Transmission of each wavelength at various ranges. I believe you will find both documents very helpful to you, especially in your case. I look forward to hearing back from you.
Tech Support Consultant
512-615-4630 x 4630
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