Approved Method: Spectroradiometric Measurement Methods for Light Sources

Spectroradiometric Measurement Methods for Light Sources

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ANSI/IES LM-58-20+E1
Document Type: Lighting Measurement and Testing (LM)

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SKU: ANSI/IES LM-58-20 Category: Tag:

Product Description

Approved American National StandardThis document describes the requirements and recommendations of the instruments and procedures for spectroradiometric measurements, including those of color performance, spectral irradiance, spectral radiance, and spectral total radiant flux, either in relative or absolute units. The spectral range is from approximately 200 nm to 1,700 nm, where the characterization of light from light sources, visual displays, and light emitting diodes is most commonly done.

Page count: 14 pages
Publisher: Illuminating Engineering Society (2020)
SKU: ANSI/IES LM-58-20+E1
ISBN-13: 978-0-87995-040-8

Chapters:

  • 1.0 Introduction and Scope
    2.0 Normative References
    3.0 Definitions and Nomenclature
    4.0 Spectroradiometers
    5.0 Detectors
    6.0 Correction Methods
    7.0 Calculations
    8.0 Reporting Requirements

Citation Format:
Illuminating Engineering Society. ANSI/IES LM-58-20+E1, Approved Method: Spectroradiometric Measurement Methods for Light Sources. New York: IES; 2020.

CONTENTS

  • 1.0 Introduction and Scope
  • 1.1 Introduction
    1.1.1 Safety Precautions
  • 1.2 Scope
  • 2.0 Normative References
  • 3.0 Definitions and Nomenclature
  • 4.0 Spectroradiometers
  • 4.1 Characteristics
    4.1.1 Wavelength Dispersion
    4.1.2 Wavelength Calibration
    4.1.3 Bandpass
    4.1.4 Slit Scattering Function (Bandpass Function)
    4.1.5 Wavelength Interval
    4.1.6 Stray Light
    4.1.7 Input Geometry
    4.1.8 Calibration Sources
    4.1.8.1 Spectral Irradiance
    4.1.8.2 Spectral Radiance
    4.1.8.3 Total Spectral Radiant Flux
  • 4.2 Array Spectrometry
    4.2.1 Design
    4.2.1.1 CCD Array Spectrometers
    4.2.1.2 Linear Diode Array Spectrometers
    4.2.2 Integration Time
    4.2.3 A/D Converter Data Rate
    4.2.4 Dynamic Range
    4.2.5 Signal-to-Noise Ratio (S/N Ratio)
    4.2.6 Linearity
    4.2.7 Dark Measurement
    4.2.8 Spectral Resolution
    4.2.9 Trigger Capability
    4.2.10 Wavelength Uncertainty
    4.2.11 Bandpass Determination
  • 4.3 Scanning Spectrometry
    4.3.1 Continuous Scanning
    4.3.2 Sequential Scanning
  • 5.0 Detectors
  • 5.1 General
  • 5.2 Ultraviolet-Visible Region (UV-VIS)
    5.2.1 Photomultipliers
    5.2.2 Silicon Photodiodes
    5.2.3 Other Photodiodes
  • 5.3 Near-Infrared (NIR) Region
    5.3.1 Germanium Photodiodes
    5.3.2 Indium Gallium Arsenide (InGaAs) Photodiodes
    5.3.3 Other NIR Photodiodes
  • 6.0 Correction Methods
  • 6.1 Flicker and Corrections
  • 6.2 Bandpass Correction
  • 6.3 Stray Light and Stray-Light Correction
  • 7.0 Calculations
  • 7.1 Spectral Radiometric Quantities
  • 7.2 Radiometric Quantities
  • 7.3 Photometric Quantities
  • 8.0 Reporting Requirements
  • Additional Reading
  • References