On March 30, Xiaomi MIX FOLD was officially released and will go on sale this Friday. The device has the industry’s first liquid lens and Xiaomi’s first professional imaging chip-Surging C1.
However, Xiaomi officially conducted some popular science on the liquid lens today. The optical fluid in the lens, refractive index, and dispersion characteristics are lower than the commonly used fluorite in SLR lenses, and the optical performance is excellent.
It is precise because of the fluidity of the optical fluid that the two functions of telephoto + macro can be achieved by squeezing the liquid lens to change the optical power. The lens material in the traditional solid lens is composed of glass, optical plastic, etc., and the rate radius is fixed after processing and forming.
Although, by mounting the lens slow group on a motor to drive, the focus position is changed by moving the optical axis in the direction of the optical axis to achieve continuous focus from long-range to close-range.
However, the solid lens has a problem that is difficult to solve so far. When the lens module is moved in a group to achieve macro imaging, the amount of stroke movement increases, especially when the telephoto lens needs a large amount of movement when the image is super close.
In order to ensure the thickness of the whole device, the current requirements for the size of the solid-state module and the limitation of the motor stroke design are difficult to achieve.
In addition, to the telephoto macro, macro shooting is generally achieved through digital cropping and post-magnification. The disadvantages of this are low resolution and poor image quality. The design of the liquid lens makes it possible to ensure the size of the module.
Under the premise, the magnification and image quality are greatly improved. This is the first time that liquid lens technology has been applied to mobile phone cameras, and it is expected that more models will be equipped with this technology in the future.
