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DMD for high resolution spectroscopy in the UV range

Michael Analytis
Prodigy 25 points
Other Parts Discussed in Thread: DLP7000UV, DLP9500UV

Dear forum,

we are very interested in using the DMD device for very deep UV (down to 150nm) spectroscopy application. Since the transmittance of the entrance window will not allow for such low wavelengths, I would like to know if it is possible (of course on our own risk) to replace (remove) the window ?

Can you also tell us something about the surface material of the micro mirrors. (Reflectivity for UVC)

Thank you in advance,

Michael.

  • 0
    TI__Intellectual 2305 points

    Hi Michael,

    To find information on the Transmittance of the UV and Visible DMD windows, please check out this app note.

    The reflectance curve of the mirrors follows very closely to that of bulk aluminum (Al).

    We do not recommend removal of the window under any circumstances.

    Regards,

    A214529

  • 0 in reply to A214529
    Prodigy 25 points

    Hi ,

    thanks for the information of the app note. We firmly belive that such a DMD would be extermly useful for high resolution optical spectroscopy and hence could open a whole new market for TI. We are a manufacturer of analytical instruments used for the determination of elemental concentration in metals, ceramics, glasses, etc... Our instruments are using a certain combination of suitable detectors and spectrometers to achive this task. With the aid of a DMD we could reduce overall size of such instruments and enhance the analytical power at the same time ! The DMD would be used in a new kind of camera for spectral imaging. But as a prerequist the window must allow the transmission of very low wavelengths and hence the window material must therefore be of fused silica or even better of MgF2 or CaF2. 

    We would like to build a prototyp of such a camera and would replace the original window through a CaF2 window. Of course we would do this under clean room conditions. In case we are successful with this test, could TI imagine to produce a XUV line of DMD ? The whole optical spectrometry market which could make use of such a novel camera is certainly of serveral thousend units / year.

    Best regards,

    Michael.

    www.spectruma.de

  • 0 in reply to Michael Analytis
    TI__Intellectual 2305 points
    Hi Michael,

    Thank you for your suggestions. We are always looking for customer inputs on how we can improve our product offerings.

    At this time our UV products (DLP9500UV and DLP7000UV) are designed & optimized for use with UV Light down to 363nm at illumination power density of 2.5W/cm2.

    We do not recommend removal of the window.

    Regards,

    A214529