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DLP670S: Wavelength-power density curve

Part Number: DLP670S

Hi Team,

We would like to ask your help regarding the customer's inquiry below.

We have purchased a DLP670S and intend to use it with a 795nm illumination source. We understand from the datasheet that the damage threshold between 400-700nm is 31W/cm2, but falls sharply to 10mW/cm2 beyond 700nm.

Would you be able to provide us with a wavelength-power density curve to better understand how the power damage threshold scales with wavelength? Specifically, what is the absolute maximum power density applicable at 795nm. 

Regards,

Danilo

  • HI Danilo,

    The 795nm wavelength is near infrared, just outside of the visible wavelength range.

    Our devices with visible coating windows are usually specified for either 420-700nm or 400-700nm, depending on the package technology. These wavelength ranges are qualified by internal testing here in Dallas.

    Since the DLP670S device was designed for visible wavelength applications, we did not perform infrared wavelength testing. The 10 mW/cm2 limit is a historical limit used by the product lines to avoid potential issues on applications that we just don't know about in the infrared range. We do not have wavelength by power density curves at this time.

    The device will most likely work in the 795nm range, however we cannot predict performance or lifetime without internal data.

    If the customer has more questions, we can certainly take those offline. 

    Thank you,

    Danilo

  • Hi Matt,

    Thank you very much for your response.

    Regards,

    Danilo