Application of aspherical lenses & advantages

1. Introduction to the aspheric lenses

An aspherical lens: An aspherical lens is that the radius of curvature from the center to the edge changes continuously with the increase of height. In the use of a camera lens, if only the spherical lenses are used, more lenses are needed to play a better optical performance. An aspherical lens can reduce the number of lenses because of its unique radius of curvature. Therefore, in the camera lens, the use of an aspheric lens is particularly important.

Inspherical lens display:

2. Application areas of aspherical lenses

The aspherical lens has better surface, so it is widely used in optical instrument, image and optical electronics industry. Such as digital cameras, CD players, high-end microscopy instruments, lasers, exposure and semiconductor machinery.

3. Advantages of aspherical lenses in laser applications

1、 Generally speaking, due to the symmetry of the sphere of the traditional spherical lens, when using different wavelength of light irradiation, the lens will have different refractive index, and cause color difference. The aspherical lens can be corrected by designing an asymmetric radius of curvature, so that the rays of different wavelengths have the same refractive index in the lens, thus reducing the color difference.

2、Correction of image field deformation or distortion. The lens will deform or distort the object at the edge of the image, affecting the clarity of the image. The aspherical lens can be better corrected for image field deformation or distortion by designing an asymmetric radius of curvature so that the light at different positions has the same refractive index within the lens.

3、To achieve a larger field of view and a higher resolution. The aspherical lens can be designed to create a larger field of view, make the coverage of the lens more extensive, and can also improve the resolution of the image field correction, so as to better meet the needs of the application.

4、To achieve much smaller optical systems. Due to the symmetry of the spherical lens, the spherical lens needs to increase the lens to achieve the imaging quality, which makes the optical design complicated and increases the cost.aspherical lenses can be specially designed to achieve equal imaging quality, reduce optical components and reduce design costs, thus enabling smaller optical systems.

5、Because of its unique radius of curvature, coupled with the special process, asphlens can reduce the counterfeiting on the market and ensure the quality of the product.

With the continuous improvement of imaging quality requirements on the market, aspherical lens has the advantages of reducing color difference, correcting image field change or distortion, achieving larger field of view, higher resolution and achieving smaller optical system. As more and more people know the laser application, it is believed that the use rate of aspherical lens in laser application will gradually increase.