Optical lens group
A technology of optical lens group and lens barrel, which is applied in the field of optical lens group, and can solve the problems of affecting the relative position of lenses, optical performance that cannot satisfy users, and affecting the optical imaging quality of optical lens group, etc.
Inactive Publication Date: 2015-11-04
CALIN TECH
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Problems solved by technology
[0004] However, the general industry can allow the tolerance of the inner diameter of the lens barrel to be about 0.005 mm. However, as the optical lens group becomes more and more miniaturized, the error of 0.005 mm has seriously affected the relative position between the lenses, and thus affected The optical imaging quality of the optical lens group, and after making the optical lens group miniaturized design, its optical performance cannot meet the needs of users
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[0029] In order to illustrate the present invention more clearly, the preferred embodiment is now cited in detail with accompanying drawings as follows, please refer to Figure 1 to Figure 3 As shown, the optical lens group 100 of the preferred embodiment of the present invention includes a lens barrel 10, a first lens 20, a second lens 30, a third lens 40, two shading rings 51-52, a fixing ring 53 and a The fourth lens 60 . in:
[0030] The lens barrel 10 is hollow, and opposite ends thereof respectively have an object-side hole 12 and an image-side hole 14 communicating with the inside of the lens barrel 10 .
[0031] The first lens 20 is disposed in the lens barrel 10, and the first lens 20 has a first mirror surface 21 facing the object side hole 12, and a second mirror surface 22 facing the image side hole 14, and the second mirror surface 22 is provided with a first positioning surface 23 and a first reference surface 24 surrounding the second mirror surface 22, and th...
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The invention provides an optical lens group. The optical lens group comprises a lens cone, a first lens, a second lens and a third lens, wherein the first lens, the second lens and the third lens are arranged in the lens cone; the first lens is arranged in the lens cone, and the outer periphery of the first lens is abutted against the inner cone wall of the lens cone; the second lens is abutted against the first lens, and a gap is reserved between the second lens and the inner cone wall of the lens cone; and the third lens is abutted against the second lens, and a gap is reserved between the third lens and the inner cone wall of the lens cone. The relative position of the lenses is fixed through enabling corresponding structures of the lenses to be abutted against each other, thereby further greatly reducing influences imposed on the optical performance by the tolerance of the lens cone.
Description
technical field [0001] The present invention relates to optical devices; in particular, it refers to an optical lens group. Background technique [0002] With the advancement of optical technology, optical devices such as cameras, video cameras, and projectors are becoming more and more popular, and the part that has the greatest impact on the optical performance of the above-mentioned optical devices is the design of the optical lens group used. [0003] Generally speaking, the main components of an optical lens group usually include an external lens barrel and an internal optical lens, which will directly affect the optical performance of the optical lens group, except for the optical design of the optical lens. , and the other is the relative position error between the optical lenses. When the error is smaller, it means the closer to the preset state during design, which makes the optical lens group closer to the ideal state. [0004] However, the general industry can al...
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IPC IPC(8): G02B13/00G02B7/02
Inventor 陈俊铭洪国钦
Owner CALIN TECH