Optical lens group

Abstract

The invention relates to an optical lens group which comprises a first lens and a second lens, wherein an optical axis of the first lens and an optical axis of the second lens are superposed; the radius of the second lens is more than that of the first lens; the first lens comprises a first optical part and a first mounting part; the second lens comprises a second optical part and a second mounting part; the first mounting part comprises a first buckling surface, a first bearing surface and a third bearing surface; the second mounting part comprises a second buckling surface and a second bearing surface which can cooperate with the first buckling surface and the first bearing surface; the vertical distance between the third bearing surface and the first bearing surface is D, and D is more than or equal to 0.08 mm and less than or equal to 0.5 mm. The optical lens group is stable in structure, realizes automatic centering and is favorable for rotational symmetry of image quality.

Description

technical field [0001] The invention relates to an optical lens group. Background technique [0002] Chinese patent 200910308640.8 discloses an optical lens group and a lens module. This optical lens group is composed of a first lens and a second lens. The first lens and the second lens are fastened together through the close abutment of the first abutment surface and the second abutment surface, and the abutment of the first inclined surface and the second inclined surface. Although this optical lens group is fastened together by the inclined surface and the supporting surface, it does not have a certain fastening depth, and the first inclined surface and the second inclined surface do not have a certain inclination angle, so that the first lens and the second The fastening between the lenses is unstable, which is not conducive to assembly and positioning, and the centering effect is poor. [0003] Chinese patent 201420123746.7 discloses a lens module. The first lens an...

AI Technical Summary

Problems solved by technology

For example, in the patent with the application number "CN200710202862.2", one method is to use two matching dimensions for buckling, which belongs to over-positioning, and it is easy to cause uncontrolled assembly; the other way is to use multiple saw teeth for buckling It is easy to produce deviations during assembly, resulting in assembly failure

Another example is that in the patent application number "02157432.4", the two lenses are fastened at right angles, which will produce stress and easily lead to changes in surface shape.

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