Physiology of Aging Selected Contribution: Chronic intermittent hypoxia enhances respiratory long-term facilitation in geriatric female rats

An image recorder for recording an image by reading image data produced by quantizing the image pixel by pixel, subjecting the read image data to image processing, and then manipulating a laser beam modulated by pulse width modulation. A pixel of interest is recorded in a position which is controllable depending on the presence/absence or the densities of pixel data of pixels adjoining the pixel of interest. A laser beam is modulated by pulse width modulation, while the phase or the timing of pulses is controlled to control the recording position, whereby control circuitry is simple and economical.