电子科妓女学光电科学与工程学院 SCHOOL OF OPTOELECTRONIC SCIENCE AND ENGINEERING OF UESTC 6,7 Color Fundamentals GAMMA X-RAYS U-V INFRA- MICRO- RAYS RED WAVES T-V RADIO 001nm 1nm 10nm .0001ft 1 ft 100ft ULTRAVIOLET VISIBLE SPECTRUM INFRARED 300 400 500 600 700 1000 1500 WAVELENGTH (Nanometers) FIGURE 6.2 Wavelengths comprising the visible range of the electromagnetic spectrum. (Courtesy of the General Electric Co.,Lamp Business Division.) Visible light wavelength:from around 400 to 700 nm. >an achromatic (monochrome)light source:Intensity. >a chromatic light source,3 attributes to describe the quality: Radiance total amount of energy flow from a light source (Watts); Luminance amount of energy received by an observer(lumens); Brightness intensity.6.1 Color Fundamentals ◼ Visible light wavelength: from around 400 to 700 nm. ➢an achromatic (monochrome) light source: Intensity . ➢a chromatic light source, 3 attributes to describe the quality: Radiance = total amount of energy flow from a light source (Watts); Luminance = amount of energy received by an observer (lumens); Brightness = intensity