Hyperspectral screen-image-synthesis meter with scattering-noise suppression.

Area of Science:

• Optical Engineering
• Spectroscopy
• Material Science

Background:

• The original screen image synthesis (SIS) meter offered high-speed, whole-field measurements by fusing data from multiple sample-rotational angles.
• However, the initial SIS meter was limited by stray light noise and lacked spectral measurement capabilities.

Purpose of the Study:

• To develop an improved SIS system incorporating snapshot hyperspectral technology to address limitations of the original design.
• The goal was to create a hyperspectral meter capable of accurate spectrum and color temperature coefficient measurements while mitigating stray light noise.

Main Methods:

• A sparse sampling screen (SSS) based dispersion image was integrated into the SIS system.
• Hyperspectral data was captured at various sample-rotational angles and then fused to generate whole-field hyperspectral data.
• The system's accuracy was validated by comparing its hyperspectral values and 2D color temperature coefficient distribution with a one-dimensional spectrum goniometer (ODSG).

Main Results:

• The proposed SIS system successfully produced whole-field hyperspectral data and effectively reduced stray-light noise.
• Experimental comparisons confirmed the correctness of the hyperspectral values obtained.
• The system demonstrated accurate 2D color temperature coefficient distribution, comparable to ODSG measurements.

Conclusions:

• The integration of snapshot hyperspectral technology with SSS has resulted in a functional screen image synthesis hyperspectral meter.
• This novel system overcomes the limitations of previous SIS meters, offering enhanced spectral measurement capabilities and noise reduction.
• The study validates the feasibility of the developed meter for both spectrum distribution and color temperature coefficient measurements.