By laser projection I mean the laser beam that is projected onto the photosensitive drum in the laser printer. The printer receives digital image data from a computer processes it and projects it onto the photosensitive drum using laser beams.
What I want to understand is:
- How does the conversion from digital image data to a laser beam projection actually happen? What is the process? What are the steps involved? What are the components (eg. electronic circuits) involved?
- Does the laser beam project the entire image at once onto the drum like a slide projector projects a entire slide onto the screen or does the laser beam like a pencil "draw" the image onto the drum like how a child would draw a picture on a paper using a pencil?
- If the laser beam draws like a pencil, how is the laser guiding mirror that directs the laser beam onto the drum able to move so fast that a page is printed every few seconds?