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Use of DLP for spectrometers in the 3+ micron range.

Anthony Colaprete
Prodigy 10 points
Other Parts Discussed in Thread: DLP4500NIR


We are interested in developing a DLP instrument for space flight and planetary exploration. The DLP4500NIR EVM supports observations into the near infrared (out to about 2.5 microns). We are interested in pushing these out further using an alternate detector. What may limit the application is the reflectance of the MEMS mirrors and the spectrometer lens transmission. Can the MEMS mirror surface finish be explained? Also, what type of lenses are used in the spectrometer (e.g., SiO2)?]

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    TI__Mastermind 30600 points

    Anthony,

    Welcome to the DLP Forums and thank you for your questions. The MEMS mirror surface is simply aluminum. I'd like to point you to an app note that might be helpful for your questions. 

    The optics module in the NIRscan is provided from a third party and is optimized for the wavelength range used in the measurements. I don't know the exact specification and makeup of the optical module.

    I'd also like to bring your attention to this app note as well. 

    Thanks,
    Paul