In this note, we are going to learn about CIE Standard Source of Illuminant. Welcome to Poly Notes Hub, a leading destination for engineering notes for diploma and degree engineering students.
Author Name: Arun Paul.
About CIE
The CIE (Commission Internationale de l’Éclairage), often known as the International Commission on Illumination, is a leading global authority on light, lighting, color, and vision. Founded in 1913, the CIE is a professional organization that develops international standards and recommendations in various domains.
Key functions of CIE Standard Illuminant
- CIE creates and publishes international standards for measuring and describing color and light.
- It investigates several elements of light and color, such as human eyesight, color perception, and the impact of lighting on the environment and human health.
- It holds conferences, workshops, and publications to disseminate expertise.
- It works with other international organizations, such as ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission), to harmonize standards and practices worldwide.
CIE Standard Source of Illuminant
The establishes many standard illuminants that serve as reference points in colorimetry and lighting design. These illuminants represent diverse light sources and are used to assess the color of objects in specific lighting circumstances.
Here are some of the main CIE standard illuminants –
| Standard | Type | Color Temperature | Use |
|---|---|---|---|
| 1. CIE Standard Illuminant A | Incandescent light | 2856K | Represents typical, domestic, tungsten-filament lighting conditions. |
| 2. CIE Standard Illuminant D65 | Daylight | 6504K | Average daylight is commonly used in color matching and other applications that require natural sunshine. |
| 3. CIE Standard Illuminant D50 | Daylight | 5000K | Used in the print and graphic arts industries to portray daylight conditions at noon. |
| 4. CIE Standard Illuminant F2, F7, F11 | Fluorescent light sources | Represent different fluorescent lighting settings. Cool White Fluorescent (F2), Broadband Fluorescent (F7), and Narrowband Fluorescent (F11). | |
| 5. CIE Standard Illuminant E | Equal energy spectrum | Theoretical reference illuminant with the same energy across the visible spectrum. |