산산산산산산산 IMEN 315 산산산산 4. Visual Sensory Systems THE STIMULUS: LIGHT the visual stimuli as a wave of electromagnetic energy (fig 4.1a ) visible range of wavelength from 400nm (blue-violet) to 700 nm (red) a given light stimulus characterized by hue, saturation, brightness the source of light by luminous intensity/ flux (candela) illumination – the lighting quality of a given working environment (fig 4.2 ) illuminance ( 照照 ), luminance ( 照照 ) Reflectance (%) = luminance (FL) / illuminance (FC) THE RECEPTOR SYSTEM schematic view of the eyeball (fig 4.3 ) The Lens corona 照 pupil 照 lens (accommodation) 照
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산업경영공학과 IMEN 315 인간공학 4. Visual Sensory Systems THE STIMULUS: LIGHT the visual stimuli as a wave of electromagnetic energy (fig 4.1a)fig 4.1a visible.
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산업경영공학과
IMEN 315 인간공학
4. Visual Sensory Systems
THE STIMULUS: LIGHT the visual stimuli as a wave of electromagnetic energy (fig 4.1a) visible range of wavelength from 400nm (blue-violet) to 700 nm (red) a given light stimulus characterized by hue, saturation, brightness the source of light by luminous intensity/flux (candela) illumination – the lighting quality of a given working environment (fig 4.2) illuminance ( 照度 ), luminance ( 輝度 ) Reflectance (%) = luminance (FL) / illuminance (FC)
THE RECEPTOR SYSTEM schematic view of the eyeball (fig 4.3)The Lens corona pupil lens (accommodation) retina myopia ( 근시 ), presbyopia ( 노안 )
산업경영공학과
IMEN 315 인간공학
The Visual Receptor System the image may be characterized by its intensity (luminance), wave-
lengths, and size (visual angle) VA = 5.7 * 60* (H/D) two types of receptor cells (rods and cones)1. location – cones for fovea (2°of VA) and rods for periphery2. acuity – motion in the periphery3. sensitivity – advantage of rods in sensitivity4. color sensitivity – rods are color blind5. adaptation – temporary blindness, glare6. differential wavelength sensitivity – cones are generally sensitive to all
wavelengths while rods are insensitive long lengths