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OPT3004: 【ALS】TI_OPT3004 question

Jimmy Lai
Expert 6845 points
Part Number: OPT3004

Dear Team,

Whether OPT3004 would meet following texture? We appreciated your great support.

The material is as follows

soda glass+ translucent Ink Printing on ALS  plane

Many Thanks,

Jimmy

  • 0
    TI__Expert 6800 points

    Hi Jimmy,

    Soda glass in general should not attenuate light entering the sensor much, but the translucent ink printing could attenuate the light significantly and could require compensation. The following video goes over the considerations to make when using dark glass covers.

    https://training.ti.com/light-sensor-calibration-lab?context=1139747-1139746-1140283-1149259

    Thank you,

    Brent Elliott

  • 0 in reply to Brent Elliott
    TI__Expert 6845 points

    Hi Brent,

    Thanks a lot for your reply.

     

    Any suggestion on the transmission of this soda-lime/ink system for visible light?

     

    Referring to the OPT3004 datasheet (2.1.1 Choosing the Dark Window), there is a working example with only around 20% transmittance at 550nm.

    May I understand it as the window 550nm transmittance should be > 25%?

     

    BTY, is it necessary to consider ink surface roughness or/and transmission haze?

     

    Thank you again.

    Jimmy

  • 0 in reply to Jimmy Lai
    TI__Expert 6800 points

    Hi Jimmy,

    The transmission spectrum of the system you are describing depends completely on the specifics of the material. Many dark glasses will have 10% transmission at around 550nm, but it is dependent on the specific material of the window. Surface roughness should not be an issue since this will behave like a diffuser which should not impact performance negatively.

    Thank you,

    Brent Elliott