The present invention relates to a multicarrier-based optical transmit subsystem and a method for generating an optical signal. The method comprises requesting content from a caching system. This infrared fluorescence is superior in transmission through biological tissues. The inlet has a longitudinal axis generally aligned with a direction of flow of the air as the air approaches the inlet. The specially constructed image sensor array, in one embodiment, is a hybrid monochrome and color image sensor pixel array, wherein a first subset of the pixels are monochrome pixels devoid of wavelength selective color filter elements and a second subset of the pixels are color sensitive pixels including wavelength selective color filter elements. The pull of the power tool on upstream mechanical parts is discharged against the support structure of the first chuck.