Camera lens and depth of field calibration method thereof

Abstract

The invention provides a camera lens and a depth of field calibration method thereof. The camera lens comprises a lens module, a central processing unit and a thermal expansion compensation module, wherein the lens module comprises a first mirror and a second mirror being a baseline length b2 away from the first mirror; and the first mirror comprises a first lens unit molded on the same glass substrate with the first mirror, and a second lens unit being a baseline length b1 away from the first lens unit. The first mirror is made of glass, and has a relatively low thermal expansion coefficient, so that the baseline length between the first lens unit and the second lens unit is basically not influenced by temperature variations, and can be taken as a standard value of a depth of field. Based on the standard value, a variation value of the baseline length between the second mirror and the first mirror can be obtained by calculation, so that thermal expansion of the camera lens can be calibrated.

Description

【Technical field】 [0001] The invention relates to a camera lens for portable electronic equipment, in particular to a camera lens and a depth-of-field calibration method thereof. 【Background technique】 [0002] With the continuous development of technology, electronic devices are constantly developing toward intelligence. In addition to digital cameras, portable electronic devices such as tablet computers and mobile phones are also equipped with lens modules. In order to meet the needs of people, higher requirements are put forward for the image quality of the objects captured by the lens module. Moreover, with the development of 3D imaging technology, it has become a development trend to equip these mobile electronic devices with naked-eye 3D camera lenses. [0003] The 3D lens module in the related art adopts two groups of lens modules to imitate the imaging function of human eyes to take pictures with a certain depth of field. Such as figure 1 As shown, the related art...

AI Technical Summary

Problems solved by technology

However, the difficulty in calibrating the depth of field lies in the fact that the internal temperatures of portable electronic devices such as mobile phones are not equal, such as the temperature of the mobile phone circuit board, chip, and image sensor. Therefore, if the method of measuring the internal temperature of the mobile phone is used to calculate The amount of baseline change between the first shot C1 and the second shot C2 is unrealistic

Just because the change △b of the baseline length between the first lens C1 and the second lens C2 cannot be calculated, the depth of field cannot be calibrated

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