Selecting the Right Collimating Lens from Thorlabs


Lenses come with many aberrations like chromatic aberration and spherical aberration. To reduce aberrations and to increase the performance of your system it is important to choose a lens with a right design and correct multi-element systems.

Thorlabs provides a high-quality optical material with the substrate and anti-reflection coating of a different wavelength.

Spherical Singlets

It is a preferable choice for many applications where aberration is not a great concern. The various singlet design of collimating lens Thorlabs are Plano-Convex, Bi-Convex, Plano-Concave, and Bi-Concave. These lenses are used for the wide application.

Plano-Convex Lenses

These lenses are used where the object or image distance is more than five times the other. Plano-convex lens of the Thorlabs performs best for collimating a point source or for focusing collimated light. These lenses are subjected to some aberration that reduces a multi-element system.

Bi-Convex Lenses

It performs best when the object and image are on opposite sides of the lens and the object to image ratio is 0.2 to 5.

Plano-Concave Lenses

Plano-Concave Lenses have a negative focal length and are used for the diversion of collimated beams of light in an instrument like a telescope. It balances the positive spherical aberration of the positive focal length singlets with its negative wave-front.

Bi-Concave Lenses

This collimating lens of Thorlabs has a negative focal length and is commonly used to increase the divergence of converging light.


Location: Australia

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