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NIrscan nano range

davide bellotti
Intellectual 350 points
Other Parts Discussed in Thread: DLP2010NIR, BQ24250

HI .I ' m working with my IR detector in a range from 1200 nm up to 2200 nm , GDP photodiode extended range.

Can  I replace my IR sensor with the  NIR scan nano  ? It is possible install my photodiode and scan   only the wavelenghts I need example 1300 , 2100 , etc..

thanks .

bye 

  • 0
    TI__Guru 54550 points

    Hello Davide,

    Although you can replace the sensor, at minimujm you would also have to change the bandpass filter (just before the grating) and the grating itself, since both are designed for the 900 - 1700 nm range.

    You would have to determine the correct grating pitch to get the wavelength range you want on to the width of the DMD and you may also likely have to change the angle of the grating to couple the light onto the DMD. 

    This is not a trivial task, but it is possible.

    Please also look at the TI Design for the NIRscan-Nano [ http://www.ti.com/tool/TIDA-00554?keyMatch=nirscan%20nano&tisearch=tidesigns ].  All of the design files are there including specifications for the lenses used.  Please check that the lenses will work in the range you are attempting to optimize for.

    I hope this helps.

    Fizix

  • 0
    TI__Expert 6995 points

    Additionally, you might need to tweak the transimpedance amplifier depending on the capacitance and gain needed for your photodiode. See Optimizing the DLP® Spectrometer Signal Chain for more information on photodiode options and transimpedance amplifier description. 

    The NIRscan Nano photodiode is a 1mm sensor, replace with something of similar size since the optics were designed to collect a light bundle in that area. The new photodetector will need to be aligned in the location of the current photodetector since the placement of the sensor in the can varies, and is typically not well specified by the manufacturers. 

    Also, note that the grating and its position targets the range 900-1700nm. If you desire to shift this spectrum range, the grating would need to be tilted to elect another diffraction order.

    Best regards,
    Pedro

  • 0 in reply to PedroGelabert
    Intellectual 350 points
    Hi thanks for your answer , this is a very important projetc for me , so :
    1) I will try to change the angle of the grating
    2) I will change the photodiode with an extender range
    3)I will adjust the transimp. amplifier for the new PD.
    4)i will split the range with installing two spectrometer in the prcess control , one for the standard range 900-1700nm and the other with 1400-2200 nm(changing the angle of the grating and the PD).
    Is this a good way?
    thanks and best regards.
  • 0 in reply to davide bellotti
    TI__Expert 6995 points

    Davide,

    The current grating produces about 800nm wavelength spread. If you tilt the grating by 4 degrees, you can achieve about 1300-2100nm. Also note that there is a highpass filter that passes everything above 885nm, so targeting a wavelength start of 1300nm would require a different filter. I would recommend a filter that blocks wavelengths below 1285nm.

    You can find the optical ZMX files in the NIRscan Nano Tool Folder, under the "Download Design Files". Look for the CAD Files (Opto-Mechanical). 

    Best regards,

     Pedro

  • 0 in reply to PedroGelabert
    Intellectual 350 points
    Hi Pedro thank you very much for your answer .
  • 0 in reply to davide bellotti
    TI__Expert 6995 points

    Davide,

    I have collected some of the needed info for shifting the wavelength range as a FAQ.

    Best regards,
    Pedro

  • 0 in reply to PedroGelabert
    Intellectual 350 points

    Hi pedro thank you very much for the informations , are very importants.

    I have found the right long pass filter for my IR range , do you have mechanical information for the dimension of the filter and the lens?

    thank you .

  • 0 in reply to davide bellotti
    TI__Expert 6995 points

    Davide,

    I have listed all the design files in this FAQ. Look under the Opto-Mechanical entry. 

    Best regards,
    Pedro

  • 0 in reply to Fizix
    Intellectual 350 points

    Dear Fizix ,

    I am ready to buy the NanoScan for test in laboratory , I have just some question .

    I will modify the range from 900-1700 to 1300-2150 , the question is :

    Can I dismount all the parts for make the mechanical modifications of the chassis ?

    I have differts ir leds , 1300 nm 1700nm 2100 nm etc .Can I use it for check the right waveleghts positions ?

    if the test will be ok , can I buy all the optics parts like lens grating etc.. direct from the providers or you can provide?

    thank you and best regards.

    davide

  • 0 in reply to davide bellotti
    TI__Expert 6995 points

    Davide,

    I have placed an E2E FAQ that summarizes the modifications to the NIRscan Nano engine, as well as, the considerations on resolution and wavelength range here:

    The post A Look Inside the NIRscan Nano shows the optics inside of the NIRscan Nano engine.

    Best regards,
      Pedro

  • 0 in reply to PedroGelabert
    Intellectual 350 points

    Dear Pedro , 

    thank for your advice , there are only some question :

    1)Can I send the  TI  lens drawing to optimax ?Can I ask for the lens kit for nanospectrometer TI?

    2)Can I implement the canbus in your pcb only with a little change of the pcb?Canbus pin are not used in your project?

    3)Wich software i must to use for open  your pcb files? 

    thanks and best regards.

  • 0 in reply to davide bellotti
    TI__Expert 6995 points

    Davide,

    The TI license states:

    Buyers are authorized to use TI reference designs with the TI component(s) identified in each particular reference design and to modify the reference design in the development of their end products. HOWEVER, NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT, AND NO LICENSE TO ANY THIRD PARTY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT, IS GRANTED HEREIN, including but not limited to any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which TI components or services are used. 

    Thus you can send the TI lens drawings to Optimax and modify them as long as your implementation uses the TI DLP2010NIR.

    You can also modify the design to reroute the CanBus pins. The CAN bus are mixed to PA0 and PA1, PB0 and PB1, PT0 and PT1, or PT2 and PT3. However note the current use of those pins:

    • The current implementation uses PA0 and PA1 as I2C9 to communicate with BQ24250.
    • The current implementation uses PB0 and PB1 as USB pins.
    • The current implementation uses PT0, PT1, PT2, and PT3 as LCD

    Thus, the simplest approach would be to use another I2C port for BQ24250 communication and use PA0 and PA1 for CanBus. The current implementation is using I2C6, I2C7, I2C8, and I2C9. So you would need to replace I2C9 with another I2c, like I2C2 that is mixed in PN2 and 

    The design files were generated using Cadence OrcCAD and Cadence Allegro.

    Best regards,
    Pedro

  • 0 in reply to PedroGelabert
    Intellectual 350 points

    Pedro thank you very much.

    best regards.