Which lens should i buy for normal collimation of light ? Will biconvex aspherical lens do it ?
Most aspheric lenses we use are plano-convex. There are many different lenses used to collimate laser light and which one(s) you use depends on the diode, if it is a direct diode laser. Some have such aggressive divergence in one axis that cylindrical lenses are used in conjunction with an asspheric lens. Other times we use compound lenses or multi-element lenses to collimate a diverging beam.
You aren't going to collimate an LED with any lens. They aren't coherent. They are generally across a wider band too. A 532nm lens might be AR coated for that wavelength.
I get that ,one question guys does the wavelength of light affects the collimation ? Cause i found a site saying Lens for 532 nm what if use higher or lower wavelength light?
Which light source should i'll be using?
Steve, your mention of biconvex aspherical caught my attention, a ~6 mm G2 lens is a slightly biconvex aspherical, I am sure for a good reason. However, for larger diameter lenses I keep finding plano convex aspherical lenses being shown as an ideal, do you know why biconvex aspherical is sometimes a good choice, if so?
Edit: Went googling: Here's an example of a plano convex aspherical lens being mentioned https://www.thorlabs.com/tutorials.cfm?tabID=f7ed0dd5-3f31-4f84-9843-e0f7ac33f413
More: https://integratedoptics.com/laser-beam-collimation
Which light source should i'll be using?
Don't know.Steve, your mention of biconvex aspherical caught my attention, a ~6 mm G2 lens is a slightly biconvex aspherical, I am sure for a good reason. However, for larger diameter lenses I keep finding plano convex aspherical lenses being shown as an ideal, do you know why biconvex aspherical is sometimes a good choice, if so?
Edit: Went googling: Here's an example of a plano convex aspherical lens being mentioned https://www.thorlabs.com/tutorials.cfm?tabID=f7ed0dd5-3f31-4f84-9843-e0f7ac33f413
More: https://integratedoptics.com/laser-beam-collimation