In optical systems, optical lenses are necessary and the most fundamental components. They are transparent and allow light transmit. According to actual application, they are designed to control the light directions, further to its path, the focus and magnification. They could be widely used in cameras, telescopes , projector and such optical instruments.
Of course, it is important to understand the basic light principles. As we all know, Light travels in a straight line until it hits a surface, where it could be absorbed, reflected, or refracted. When light passes through a material with a different refractive index, refraction occurs and causes direction changing. This phenomenon is what allows lenses to bend and focus light.
An optical lens is made of a material with a specific refractive index, such as glass or plastic. It has two surfaces, called the convex (bulging outwards) and concave (curving inwards) surfaces. When light passes through the lens, it is refracted twice: once at each surface. The amount of refraction depends on the shape and curvature of the lens, as well as the refractive index of the material.
The behavior of light passing through an optical lens can be mathematically described using the lens equation: 1/f = 1/v + 1/u, where “ f “ is the focal length of the lens, “ 1/v” is the distance of the object from the lens, and “ 1/v” is the distance of the image from the lens. This equation helps to predict how the lens will affect the path of light and where the image will be formed.
While optical lenses’ design is a complex and iterative process, many aspects, such as size, weight, performance, cost, need to put into consideration. Our optical engineers have more than ten years practical experiences and could provide better solution.
Do not hesitate to contact me with sarah@toperoptics.com or wechat/mobile/whatsapp: +8613037626357. Thanks!