To narrow a 10 mm diameter beam from a laser diode to 1 mm, two lenses are required. The first lens must have a focal length that is ten times greater than the second lens, for instance, a 100 mm focal length lens paired with a 10 mm focal length lens. These lenses should be positioned to share a common focal point to achieve the desired beam diameter effectively.
PREREQUISITESOptical engineers, laser technicians, and anyone involved in laser beam manipulation and focusing techniques.
You can do it with 2 lenses. The first has to have 10 times the focal length of the second, for example 100 mm and 10 mm.Quant said:TL;DR Summary: How to narrow d=10 mm beam to d=1 mm
I have a collimated beam from a laser diode d= 10 mm and want to narrow it down to 1 mm. I suppose to use a lense to focus it and then use a lense to collimate it with d=1mm but this lense must have focus distance of 1 mm?? Are there such lenses? Or I must do it in other way?