Amazon.com: Laser Pen
Laser Pen, Portable Wireless Page Turning Pen, case Demonstration Stylus, Suitable for Conference Office, Real Estate Agent, Teaching Teacher Essential use, Black Pen/red Light
Amazon.com: Pen Laser Pointer
Green Laser Pointer High Power Rechargeable Lazer Pointer, Laser Pen with Long Range Adjustable Focus with Star Cap, Laser Pointer Pen Suitable for Outdoor, Astronomy, Cats Dogs (Green)
Amazon.com: Powerful Laser Pointers
Green Laser Pointer High Power Rechargeable Lazer Pointer, Laser Pen with Long Range Adjustable Focus with Star Cap, Laser Pointer Pen Suitable for Outdoor, Astronomy, Cats Dogs (Green)
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Laser pointer - Wikipedia
A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i.e. coherent light) to highlight something of interest with a small bright colored spot.
laser pen - Best Buy
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Zeus Pro 2 - Powerful Blue Laser Pointer 5 WATT / 450nm
Zeus Pro 2 - The most powerful blue burning laser pen 5W with adjustable focus & 3 modes. It's a high power military long range laser. It's 5 Watts 5000mW
Laser Pointers | Green, Blue, Red, High Power & Other Styles
Highlight objects of interest, specific words, and more with Laser Pointers with 630-670nm wavelengths and up to 20 milliwatts. Featuring top brands like Beamshot, Marathon Watch, and Z-Bolt our selection of Laser Pointers offer strong and bright beams of
指星笔 - 百度百科
指星笔，又称激光笔，正式名称是“ 激光指示器 ” (Laser pointer)。 是把可见 激光 设计成便携、手易握、激光模组 (二极管)做成的笔型发射器。 常见的激光指示器有红光 (650-660nm)、绿光 (532nm)、蓝光 (445-450nm)和蓝 紫光 (405nm)等。 激光在漆黑的夜空中由于 瑞利散射 的关系造成一条明亮的光柱，可作指星用途，指星笔一词由此而来。 其中人的眼睛对绿光最敏感 (555nm)，因此较常使用。 通常在会报、教学、导赏人员都会使用它来投映一个光点或一条光 …