Achromatic Lens

1. What is achromatic

• What is chromatic aberration?

When imaging with white light, in addition to the five monochromatic aberrations produced by each monochromatic light, the dispersion caused by the different refractive indices of different colors of light causes different propagation paths of different colors of light, thus presenting The aberration caused by the difference in the optical path of different colors of light is called chromatic aberration (abbreviated as chromatic aberration). Chromatic aberration can be divided into positional chromatic aberration and magnification chromatic aberration due to different properties.

Ideally, a perfect lens would focus all wavelengths to a single point, where the best focus with the "circle of least confusion" would be. However, in actual use, the refractive index of each color wavelength is different, which will lead to chromatic aberration.

• How to achromatic

In practical applications, if you want to use two different lights, because of the problem of color difference, you need to adjust the image twice, or you need to set up another set of imaging equipment, which brings great inconvenience to the production operation and increases the cost. cost.

In order to solve the problem of chromatic aberration, the problem of chromatic aberration is eliminated through a special combination of lenses with different refraction and scattering characteristics.

Achromatic lenses are characterized by their ability to reduce or eliminate chromatic aberration. That is, an improved lens that can reduce or eliminate chromatic aberration, so that two different colored light paths (such as blue-violet and yellow) can be clearly focused at the same time.

2. TIIN OPTICS' innovative lens

Visible light and near-infrared band 1100nm achromatic lens.

Applied to machine vision detection of semiconductor silicon wafers, lithium batteries, solar photovoltaics, color sorting, medicine and medical treatment, etc.