Dear TI
I have a standard DLP light commander. I would like to replace the LEDs with a UV source. Accordingly I would need to know whether the projector can project light at wavelengths down to around 340nm.
We are aware that the front end projection optics may need replacing but are really interested in whether the optics bringing light to the DLP mirror and the mirror itself can handle these wavelengths. I went through the datasheet for the DMD itself ( http://www.ti.com/lit/ds/dlps013a/dlps013a.pdf ). It's designed for visible light (420-700 nm) and there is not enough information on UV. The micromirror material seem to be Coming Eagle XG (or 2000), I found some info about it ( http://www.coresix.com/images/EAGLE_XG_material_information.pdf ) in particular UV transmission seem ok for the near UV. However I would need some additional information:
- how much light will be reflected at 360nm? - will the use of UV with the current mirror raises other issue (e.g. diffraction)?
Thanks in advance
Riccardo
Hello RIcardo,
We do not recommend UV operation for the DMD package type included in the Light Commander. Moreover, the optical coatings of the window are optimized for the visible not the UV. The following link shows window transmission curves for a different DMD types, but the visible coatings are basically the same. http://focus.ti.com/pdfs/dlpdmd/Type_A_window_transmission_Discovery_Website.pdf
The remainder of the optics int the core optical module (not the illumination module) are all reflective, so should not be affected much by UV light.
Please understand that operation in the UV of the DLP5500 is not covered by any warranty.
Fizix.
Hello Ricardo,
I worked on such solutions in the past . Most of DMD are not covered by any warranty if used with UV light (mainly because of optical coatings of the window as Fizix said) and you will have to work on your side to get this kind of information depending on requirements of your application.
Nik