Focusing High-Power, Single-Mode Laser Beams | Features | May 2008 | Photonics Spectra
Giving a cheap diode laser a sharper beam – Essential scrap
YEHUOT Long Range Tactical Green Laser Beam Flashligh with USB Charging,Adjustable Focus Light Pointer for Night Astronomy Outdoor Camping and Hiking - - Amazon.com
Focus Like a Laser Beam: 10 Ways to Do What Matters Most: Haneberg, Lisa L., Ferrazzi, Keith: 9780787984816: Amazon.com: Books