Absolute spectral irradiance scale in the 700-2400 nm spectral range

Area of Science:

• Radiometry
• Optical Physics
• Metrology

Background:

• Accurate spectral irradiance scales are crucial for various scientific and industrial applications.
• Existing scales may have limitations in specific wavelength ranges or accuracy.

Purpose of the Study:

• To develop a new absolute spectral irradiance scale for the 700-2400 nm range.
• To ensure accurate and reliable spectral measurements in the near-infrared spectrum.

Main Methods:

• Utilized an absolute radiometer as the primary standard.
• Employed a series of narrow-band interference filters to define discrete wavelengths.
• Determined spectral irradiance of quartz halogen lamps at specific wavelengths.
• Interpolated values for intermediate wavelengths.

Main Results:

• Successfully established an absolute spectral irradiance scale for 700-2400 nm.
• Demonstrated agreement within +/- 1% when compared to NIST standards.
• Validated the scale's accuracy through comparison with blackbody radiance-based standards.

Conclusions:

• The newly developed spectral irradiance scale is accurate and reliable for the 700-2400 nm range.
• This scale provides a valuable tool for precise optical measurements.
• The scale's high agreement with NIST standards enhances confidence in its use.