CN210038290U

CN210038290U - Lens cone structure suitable for three-piece VR optical lens

Info

Publication number: CN210038290U
Application number: CN201920488378.9U
Authority: CN
Inventors: 袁超超; 陈宝华; 范君柳; 吴泉英
Original assignee: Suzhou University of Science and Technology
Current assignee: Suzhou University of Science and Technology
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2020-02-07
Anticipated expiration: 2029-04-11

Abstract

The utility model provides a lens cone structure suitable for three formula VR optical lens. The optical lens barrel structure comprises 2 shells and 2 spacing rings. The optical lens barrel structure comprises a first shell (1), a first space ring (3), a second outer space ring (4) and a second shell (2) from left to right. Two shells pass through interior external screw, can let three lenses closely discharge, play the effect of clamping ring. The two spacing rings are positioned among the three lenses, the space between the three lenses is accurately controlled, and the three lenses are tightly placed without shaking by matching with the pressing ring. The centers of the three lenses are on the same horizontal line, the spacing between every two lenses is controlled by a spacing ring, the precision is 0.01-0.02mm, and the side surface of the peripheral tail end of the spacing ring keeps perpendicularity with the bottom, so that the lenses are prevented from being eccentric. The utility model has the characteristics of the lightweight is miniaturized, be applicable to virtual reality equipment field.

Description

Lens cone structure suitable for three-piece VR optical lens

Technical Field

The utility model relates to a VR optical lens cone structure. In particular to a lens cone structure suitable for a three-block VR optical lens.

Background

The VR lens that exists in the market at present generally adopts the single lens scheme, and the VR of single lens is light in weight, the volume is minimum, but the ability that the monolithic lens corrects aberration is limited, therefore the optical imaging quality of the VR system of monolithic lens is relatively poor, and chromatic aberration and distortion are comparatively obvious.

In order to overcome the shortcoming of monolithic formula VR camera lens, two or multi-disc VR optical lens are adopted gradually, the utility model designs a lens cone structure suitable for three formula VR camera lenses. In the design process of the optical lens, in order to improve the imaging quality and realize a larger field angle, the optical system usually adopts an aspheric design, and the aspheric lens has an irregular shape relative to the spherical lens, so that the lens cannot be fixed by adopting a traditional lens barrel structure.

The prior optical lens barrel usually fixes the inner lens through the traditional thread locking, and the relative position of the lens is difficult to be accurately controlled, so that the lens can move, and if the lens is locked on the side wall of the lens barrel by utilizing a threaded hole, the lens can be eccentric.

SUMMERY OF THE UTILITY MODEL

The invention provides a lens barrel structure suitable for a three-piece VR optical lens. The optical lens barrel structure comprises 2 shells and 2 spacing rings. The three-piece optical lens barrel structure comprises a first shell (1), a first space ring (3), a second outer space ring (4) and a second shell (2) from left to right. Two shells pass through interior external screw, can let three lenses closely discharge, play the effect of clamping ring. The two spacing rings are positioned among the three lenses, the space between the three lenses is accurately controlled, and the three lenses are tightly placed without shaking by matching with the pressing ring. The centers of the three lenses are on the same horizontal line, the spacing between every two lenses is controlled by a spacing ring, the precision is 0.01-0.02mm, and the side surface of the peripheral tail end of the spacing ring keeps perpendicularity with the bottom, so that the lenses are prevented from being eccentric.

The technical scheme of the utility model is that:

a lens cone structure suitable for a three-piece VR optical lens comprises 2 shells and 2 space rings.

The role of the two shells: three lenses are tightly arranged through the threads, and the function of a pressing ring is achieved.

The function of the space ring is as follows:

1. the edge thickness between the two lenses is accurately controlled, and the precision reaches 0.01-0.02 mm.

2. The three lenses are completely pressed together by matching with the pressing ring, and the lens does not shake.

3. The step-shaped space ring keeps perpendicularity between the peripheral tail end and the bottom of the space ring, the tolerance is 0.01 degrees, and the function of preventing the lens from being eccentric is achieved.

The tolerance of the periphery of the spacing ring and the side wall of the shell is 0.02mm, namely the diameter of the spacing ring is 0.02mm smaller than the inner diameter of the shell, so that the lens is placed in the shell to realize tight fit. The lenses follow the order of small to large insertion.

The utility model has the advantages as follows:

the utility model discloses the interval of lens in the ability accurate control lens cone prevents that the lens from taking place to rock, and does not produce eccentric phenomenon, has lightweight, miniaturized characteristics.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 shows the structural parameters of the lens optical system of the present invention;

fig. 2 is a mechanical structure diagram of the assembled lens of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

A three-piece VR optical lens with structural parameters as shown in figure 1 is designed, the optical lens has a working wavelength of visible light, a focal length of 36.4mm, a full field angle of 94 degrees, a total system length of 37mm, an entrance pupil diameter of 6mm, an exit pupil distance of 12.5mm, and MTF under the full field of view

Figure DEST_PATH_645886DEST_PATH_IMAGE001

Maximum distortion<8%。

A lens barrel structure is designed according to the above optical lens structure, and the optical lens is assembled, as shown in fig. 2. The first lens (5), the first space ring (3), the second lens (6), the second outer space ring (4) and the third lens (7) are respectively arranged in the lens barrel structure assembly body from left to right. The centers of the three lenses are on the same horizontal line, the spacing between every two lenses is controlled by a spacing ring, the precision is 0.01-0.02mm, the verticality is kept between the peripheral tail end and the bottom of the spacing ring, and the tolerance is 0.01 degrees. The space ring and the pressing ring enable the three lenses to be tightly arranged together, and the lenses are prevented from shaking. This VR optical lens barrel structure assembly body is outside, and two shells make three lenses realize the tight fit through internal thread and external screw thread after screwing up. The tolerance between the periphery of the spacer ring and the side wall of the shell is 0.02mm, namely the diameter of the spacer ring is 0.02mm smaller than the inner diameter of the shell.

The above detailed description has been provided for the purpose of illustrating the invention, and the technical solutions and advantages thereof, it should be understood that the above description is only an embodiment of the invention, and is not intended to limit the scope of the invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the invention should be included in the scope of the invention.

Claims

1. A lens cone structure suitable for three-piece VR optical lens; the optical lens barrel structure comprises 2 shells and 2 spacing rings; the three-piece optical lens barrel structure comprises a first shell (1), a first space ring (3), a second outer space ring (4) and a second shell (2) from left to right; the two shells can enable three lenses to be tightly arranged through the internal and external threads, and the function of a pressing ring is achieved; the two spacing rings are positioned among the three lenses, and the space between the three lenses is accurately controlled to be matched with the pressing ring so that the three lenses are tightly placed without shaking; the centers of the three lenses are on the same horizontal line, the spacing between every two lenses is controlled by a spacing ring, the precision is 0.01-0.02mm, and the side surface of the peripheral tail end of the spacing ring keeps perpendicularity with the bottom, so that the lenses are prevented from being eccentric.

2. The lens barrel structure according to claim 1, wherein: the edge thickness between the two lenses is controlled by the spacing ring, and the precision reaches 0.01-0.02 mm.

3. The lens barrel structure according to claim 1, wherein: the perpendicularity tolerance between the peripheral end of the space ring and the bottom is kept to be 0.01 degrees.

4. The lens barrel structure according to claim 1, wherein: the tolerance of the periphery of the spacer ring and the side wall of the shell is 0.02 mm.

5. The lens barrel structure according to claim 1, wherein: the two shells are provided with internal and external threads which play a role of a clamping ring.