AS7263 - A near miss to the Optical Inch

A project log for The Optical Inch

A tiny, ultra low profile wideband spectrometer for everyday needs (test lamps for color temperature & CRI, UV-A /UV-B dosimetry, ...)

helgehelge 01/26/2017 at 13:372 Comments

Just found this very interesting simple-ish NIR spectroscopic fingerprinting sensor which goes in the general direction of the Optical Inch. Same class of device although the impelementation is quite different because it uses dielectric narrowband filters.

Time will tell if this will evolve and how filter based arrays compare to the Optical Inch band gap array.

How do you feel about commercial products that crop up and do similar things to what you're working on?


6-Channel Visible Spectral_ID Device with Electronic Shutter and Smart Interface

"The AS7263 is a digital 6-channel spectrometer for spectral identification in the near IR (NIR) light wavelengths. AS7263 consists of 6 independent optical filters whose spectral response is defined in the NIR wavelengths from approximately 600nm to 870nm with full-width half-max (FWHM) of 20nm.

An integrated LED driver with programmable current is provided for electronic shutter applications.
The AS7263 integrates Gaussian filters into standard CMOS silicon via Nano-optic deposited interference filter technology and is packaged an LGA package that provides a built in aperture to control the light entering the sensor array. Control and Spectral data access is implemented through either
the I²C register set, or with a high level AT Spectral Command set via a serial UART."


distribution (Digi-Key $4.90)


David wrote 01/26/2017 at 16:32 point

Doesn't that article also mention the AS7262, with sensors at 450, 500, 550, 570, 600, and 650 nm?

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helge wrote 01/26/2017 at 18:59 point

Indeed, you might as well combine the -2 and -3, whack on a VEML6075

and cover the range from UV to NIR with 14 channels. They're first to market with a design that works with conventional Si processing. 

I'd still like to experimentally prove the bandgap defined wavelength selectivity of the initial concept though. Plus they prove the form factor and function of The Optical Inch has merit ;-) 

Indeed these filter baed sensors have been around for a while with their most popular incarnation being 4-channel color temperature sensor for lighting feedback and monitor calibration.

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