Imaging spectrophotometer for 2D spatially resolved measurements of spectral reflectance of materials

Khaled Mahmoud; Seongchong Park; Seung-Nam Park; Dong-Hoon Lee

doi:10.1117/12.2184014

1 July 2015 Imaging spectrophotometer for 2D spatially resolved measurements of spectral reflectance of materials

Khaled Mahmoud, Seongchong Park, Seung-Nam Park, Dong-Hoon Lee

Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 965503 (2015) https://doi.org/10.1117/12.2184014
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of

Abstract

We introduce a new prototype instrument for measuring the 2D spatially resolved distribution of spectral reflectance based on new spectral imaging technique. The instrument captures digital spectral images of a test sample using a pulsed LED-based monochromatic source and a scientific grade CCD array and special data acquisition algorithm is used to extract the useful image data corresponding to the target application. In earlier version of this instrument, we used a commercial CCD camera with 8-bit ADC without any cooling stages which has many drawbacks. In this work, we have modified our setup by introducing a new scientific grade CCD; deep-cooled interline transfer sensor with 16-bit ADC and electronic shutter. With this new instrument we could achieve a higher accuracy, higher spatially resolved measurements, higher dynamic range, mush better sensitivity and lower uncertainty and we could avoid many sources of errors in the old setup. With one wavelength scan, one can get the full reflectance data of the sample under test which saves a lot of time in comparison with conventional methods. This new instrument is promising with a potential of applications in the field of optical material testing.

Citation Download Citation

Khaled Mahmoud, Seongchong Park, Seung-Nam Park, and Dong-Hoon Lee "Imaging spectrophotometer for 2D spatially resolved measurements of spectral reflectance of materials", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 965503 (1 July 2015); https://doi.org/10.1117/12.2184014

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KEYWORDS

Reflectivity

Spectrophotometry

CCD cameras

Charge-coupled devices

Data acquisition

Prototyping

Calibration

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