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?
To narrow a beam to a 1 mm diameter, you typically need optical components such as lenses (convex or concave), beam collimators, apertures, and potentially beam expanders. Additionally, a laser source may be necessary, along with optical mounts and alignment tools to ensure proper setup.
The choice of lens significantly affects the beam diameter because different lenses have varying focal lengths and curvatures. A lens with a shorter focal length will converge the beam more sharply, allowing for a smaller output diameter. It’s essential to select a lens that matches the beam characteristics of the source for optimal results.
Collimation is the process of aligning the light rays to travel parallel to each other, which is crucial for narrowing a beam. By using a collimator, you can ensure that the beam maintains a consistent diameter over a distance, which helps achieve the desired 1 mm size at the output.
Yes, an aperture can be used to narrow a beam by physically restricting its diameter. Placing an aperture in the path of the beam will block the outer parts of the beam, allowing only the central portion to pass through. This method is effective for achieving a specific beam size, such as 1 mm, but may also reduce the overall intensity of the beam.
Achieving a precise 1 mm beam diameter can be challenging due to factors such as alignment errors, lens aberrations, and beam divergence. Additionally, environmental factors like air turbulence and vibrations can affect beam quality. Careful setup and calibration of optical components, along with controlled conditions, are necessary to overcome these challenges.