Spectral Sensor - AS7343

Sensors
1

Hi,

Product:

On the datasheet, page 50, Item 11.3 (Application Optical Requirements), it’s saying:

“…For optimal performance, an achromatic diffuser shall be placed above the device aperture. The recommended solution is a bulk diffuser that meets the minimum recommended scattering characteristic shown below. For more details refer to the optical design guide or contact ams OSRAM…”

I didn’t find this diffuser on your website.
Do you have any plans to sell it, because it’s not clear for me which diffuser I should use.

I would like to use this sensor to record the sun daily light intensity (to see the photosynthesis correlation).

I have also another question: on the product overview, it’s saying “…The board includes a white LED to illuminate the sensing area…”

But because it’s a spectral sensor, this artificial light (LED) will not introduce a measurement error, due to this aditional light?

Thanks

2

The LED(s) can be turned on or off under program control.

You may find that the spectral data are useful as is, without the diffuser, How, exactly, do you plan to collect the data?

Do you have in mind pointing the sensor towards the sun?

3

Thanks for the quick answer.
My plan is to collect the data during the day light (let’s say from 7am to 6pm, daily), placing it in a fixed place, so I cannot point the sensot towards the sun, due to the different sun position during the day.

4

That will require some thought and experimentation. The sensor IC has a “cone of vision” (see the data sheet) with a strong angular dependence.

You could try pointing the sensor board down to collect light from a horizontal white surface, or buy a research grade hemispherical diffuser intended for insolation measurements (see this guide to pyranometers).

5

No, we don’t sell/plan to sell diffusers…like it mentions for specifics they recommend contacting them directly (https://ams-osram.com/) - though also note that this is suggested for optimal performance…for most situations the un-diffused setup works fine

Whether or not it’ll introduce error depends on how well you calibrate lighted vs non-lighted measurements; you can choose to disable the LED

6

I would like to use this sensor to record the sun daily light intensity

You don’t really need a spectral sensor. Pyranometers are designed for the task and can be purchased from many sources or made from inexpensive parts and materials at home.

This DIY site is excellent.

This web site covers many of the commercial instruments, plus DIY.