The Laser Pen: From Presentation Tool to High-Tech Gadget A laser pen (or laser pointer) is a handheld, battery-powered device that uses a to emit a narrow, coherent beam of visible light. Originally designed as a specialized tool for teachers and presenters, these devices have evolved into ubiquitous gadgets used for everything from amateur astronomy to advanced material engraving. How Laser Pens Work
The term "laser" is an acronym for . Inside the sleek casing of a laser pen, several components work in unison:
: Typically AAA or lithium-ion batteries that provide the electrical energy.
The Laser Pen: From Presentation Tool to High-Tech Gadget A laser pen (or laser pointer) is a handheld, battery-powered device that uses a to emit a narrow, coherent beam of visible light. Originally designed as a specialized tool for teachers and presenters, these devices have evolved into ubiquitous gadgets used for everything from amateur astronomy to advanced material engraving. How Laser Pens Work
The term "laser" is an acronym for . Inside the sleek casing of a laser pen, several components work in unison:
: Typically AAA or lithium-ion batteries that provide the electrical energy.