A self focusing lens is a cylindrical optical lens with a radial gradient in refractive index distribution, which has focusing and imaging functions.
Characteristics of self focusing lenses:
When light travels in the air and encounters different media, its propagation direction will be changed due to the different refractive indices of the media. Traditional lenses use the optical path difference generated by controlling the curvature of the lens surface to converge light into a single point. The difference between a self focusing lens and a regular lens is that the distribution of the refractive index of the self focusing lens material gradually decreases radially, which can cause continuous refraction of the light transmitted along the axis, thus achieving smooth and continuous convergence of the outgoing light to a point.
The Application Principle of Self Focusing Lens
Due to its end face focusing, collimation, and imaging characteristics, as well as its cylindrical shape, self focusing lenses can be applied in various micro optical systems.