A collector is disclosed that is constructed to receive radiation from a radiation source and to transmit radiation to an illumination system, the collector comprising a reflective element which is internally provided with a fluid channel. The distribution generating section generates a frequency distribution of quantization index values. Each contact has a pair of first, second claws at a rear end thereof. Such a property may be a visual property, such as line type, line thickness, and color. Accordingly, the location of the wide portion of the pad along the length of the garment can be adjusted by adjusting the length of the narrow portion of the pad.