CN212623281U

CN212623281U - Optical lens

Info

Publication number: CN212623281U
Application number: CN202021538942.2U
Authority: CN
Inventors: 胡伟
Original assignee: Guangdong OPT Machine Vision Co Ltd
Current assignee: Guangdong OPT Machine Vision Co Ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-02-26
Anticipated expiration: 2030-07-30

Abstract

The utility model belongs to the technical field of the camera lens, concretely relates to optical lens, including optical device and mechanical device, optical device includes by the object space to the preceding mirror group and the rear mirror group that the image space set up, mechanical device includes the lens cone, overlaps in proper order and locates the solid fixed cylinder and the switching circle of lens cone, preceding mirror group install in the lens cone, the rear mirror group install in the tip of solid fixed cylinder, the lateral part of lens cone is fixed with leads the nail, the solid fixed cylinder be provided with lead nail complex waist groove, the switching circle be provided with lead nail complex curve groove, the curve groove drives lead the nail edge the direction seesaw in waist groove is used for changing preceding mirror group with the interval of rear mirror group. The utility model discloses can adjust preceding mirror group and rear mirror group between the distance, realize focusing the camera lens, help improving the imaging quality of camera lens.

Description

Optical lens

Technical Field

The utility model belongs to the technical field of the camera lens, concretely relates to optical lens.

Background

With the development of the strategy of manufacturing 2025 in China, the industrial automation is rapidly developed, and machine vision is widely applied to the fields of production and manufacturing, quality detection, logistics, medicine, scientific research and the like, and is used for measuring, judging, detecting defects and the like of a target part to reduce or eliminate misjudgment during manual operation and improve the measurement precision and stability. The lens occupies an important position as the 'eye' of machine vision, and the requirement on the lens is higher and higher in application scenes of electronic product manufacturing such as liquid crystal display defect detection, mobile phone touch screen circuits and the like.

However, the inventor finds that the existing scheme has at least the following defects: when the existing lens is focused, the front lens group and the rear lens group can only move simultaneously, and the distance between the front lens group and the rear lens group is fixed, so that the imaging quality is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the optical lens is provided aiming at the defects of the prior art, the distance between the front lens group and the rear lens group can be adjusted, the focusing of the lens is realized, and the imaging quality of the lens is improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an optical lens comprises an optical device and a mechanical device, wherein the optical device comprises a front lens group and a rear lens group which are arranged from an object space to an image space, the mechanical device comprises a lens cone, a fixed cylinder and a switching ring, the fixed cylinder and the switching ring are sequentially sleeved on the lens cone, the front lens group is installed in the lens cone, the rear lens group is installed in the end part of the fixed cylinder, a guide nail is fixed on the side part of the lens cone, the fixed cylinder is provided with a waist groove matched with the guide nail, the switching ring is provided with a curve groove matched with the guide nail, and the curve groove drives the guide nail to move back and forth along the direction of the waist groove so as to change the distance between the front lens group and the rear lens group.

As an optical lens's an improvement, preceding mirror group includes preceding clamping ring, first lens, first space ring, second lens, second space ring, third lens, third space ring, first cemented lens, fourth space ring, second cemented lens, iris diaphragm, well clamping ring and the third cemented lens that sets gradually along the optical axis, first lens with second lens is meniscus lens, the third cemented lens is fixed in through well lens holder in the lens cone.

As an improvement of the optical lens, the waist groove is followed the moving direction of the guide pin extends, the curve groove surrounds the lateral wall setting that revolutes the joint ring.

As an improvement of the optical lens, the guide sleeve is installed to the one end of the guide nail, the other end of the guide nail passes in proper order the waist groove with the curve groove install in the lens cone.

As an improvement of the optical lens, the waist groove forms a straight line hole along the optical axis, the curve groove forms a spiral duct along the optical axis.

As an optical lens's an improvement, iris diaphragm's lateral part is fixed with the diaphragm driving lever, the diaphragm driving lever is fixed with the diaphragm and dials the ring, the end connection of diaphragm driving lever has the ring of adjusting luminance, the ring of adjusting luminance ring set up in gu fixed cylinder, the ring of adjusting luminance is fixed in through the fitting pin gu fixed cylinder's the outside.

As an improvement of the optical lens of the present invention, the guide sleeve is installed to one end of the guide pin, and the other end of the guide pin is installed in the lens barrel.

As an improvement of an optical lens, the mechanical device further includes a focusing ring, the focusing ring is fixed to the outer side of the adapter ring through a first screw.

As an optical lens's an improvement, the tip cover of focusing ring is equipped with solid fixed ring, gu fixed ring passes through the lock pin to be fixed the focusing ring.

As an optical lens's an improvement, back mirror group is including setting gradually fourth lens, fifth space ring, fifth lens and back clamping ring along the optical axis, the fourth lens is biconvex lens, the fifth lens is meniscus lens.

As an optical lens's an improvement, the tip cover of solid fixed cylinder is equipped with the bayonet socket, the bayonet socket is fixed in through a plurality of second screws the tip of solid fixed cylinder.

The beneficial effects of the utility model reside in that, the utility model discloses an optical device and mechanical device, optical device includes by the object space to the preceding mirror group and the rear mirror group that the image space set up, mechanical device includes the lens cone, overlaps in proper order and locates the solid fixed cylinder and the switching circle of lens cone, preceding mirror group install in the lens cone, the rear mirror group install in the tip of solid fixed cylinder, the lateral part of lens cone is fixed with the guide pin, the solid fixed cylinder be provided with guide pin complex waist groove, the switching circle be provided with guide pin complex curve groove, curve groove drives the guide pin is followed the direction seesaw in waist groove is used for changing preceding mirror group with the interval of rear mirror group. Because the front lens group and the rear lens group can only move simultaneously when the existing lens is focused, the distance between the front lens group and the rear lens group is fixed, and the imaging quality is influenced, the switching ring is sleeved on the fixed cylinder, the fixed cylinder is sleeved on the lens cone, so that the lens cone is positioned at the innermost layer, the guide pin is fixed at the side part of the lens cone, the fixed cylinder is provided with a waist groove matched with the guide pin, the switching ring is provided with a curve groove matched with the guide pin, the guide pin sequentially passes through the waist groove and the curve groove, when the switching ring rotates, the curve groove drives the guide pin, thereby driving the front lens group in the lens cone to move, meanwhile, the fixed cylinder positioned between the switching ring and the lens cone is provided with the waist groove, so that the guide pin on the lens cone can move back and forth along the direction of the waist groove, namely, the rotary motion of the switching ring is converted into the back and forth motion of the front lens group in the lens cone relative to the rear lens group at the, the focusing function is realized, and the imaging quality of the lens is improved. The utility model discloses can adjust preceding mirror group and rear mirror group between the distance, realize focusing the camera lens, help improving the imaging quality of camera lens.

Drawings

Fig. 1 is a schematic sectional view of the present invention.

Fig. 2 is a schematic cross-sectional view of the lens barrel of the present invention.

Fig. 3 is a schematic sectional view of the fixing cylinder of the present invention.

Fig. 4 is an exploded view of the present invention.

Fig. 5 is a schematic structural view of the waist groove and the curved groove of the present invention.

Wherein: 1-a lens barrel; 2-fixing the cylinder; 3-a transfer ring; 4-a waist groove; 5-a curved groove; 101-a first lens; 102-a first spacer; 103-a second lens; 104-a second space ring; 105-a third lens; 106-a third space ring; 107-first cemented lens; 108-a fourth space ring; 109-a second cemented lens; 110-an iris diaphragm; 111-a middle pressing ring; 112-a third cemented lens; 113-middle lens base; 114-diaphragm deflector rod; 115-diaphragm shifting ring; 116-front press ring; 201-a fourth lens; 202-fifth space ring; 203-a fifth lens; 204-rear pressing ring; 205-bayonet; 206-a second screw; 301-guiding the nail; 302-a guide sleeve; 303-focus ring; 304-a fixed ring; 305-a dimming ring; 306-a first screw; 307-locking pin.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to fig. 1 to 5, but the present invention is not limited thereto.

Detailed description of the preferred embodiments

As shown in fig. 1-4, an optical lens, including optical device and mechanical device, optical device includes preceding mirror group and the back mirror group that sets up to the image space by the object space, mechanical device includes lens cone 1, fix a section of thick bamboo 2 and switching circle 3 of locating lens cone 1 in proper order, preceding mirror group is installed in lens cone 1, back mirror group installs in the tip of fix a section of thick bamboo 2, the lateral part of lens cone 1 is fixed with guide nail 301, fix a section of thick bamboo 2 be provided with guide nail 301 complex waist groove 4, switching circle 3 is provided with guide nail 301 complex curve groove 5, curve groove 5 drives guide nail 301 along the direction seesaw of waist groove 4, be used for changing the interval of preceding mirror group and back mirror group. Because the front lens group and the rear lens group can only move simultaneously when the existing lens is focused, the distance between the front lens group and the rear lens group is fixed, and the imaging quality is affected, the adapter ring 3 is sleeved on the fixed cylinder 2, the fixed cylinder 2 is sleeved on the lens cone 1, so that the lens cone 1 is positioned at the innermost layer, the guide pin 301 is fixed at the side part of the lens cone 1, the fixed cylinder 2 is provided with the waist groove 4 matched with the guide pin 301, the adapter ring 3 is provided with the curve groove 5 matched with the guide pin 301, the guide pin 301 sequentially passes through the waist groove 4 and the curve groove 5, when the adapter ring 3 rotates, the curve groove 5 drives the guide pin 301, so as to drive the front lens group in the lens cone 1 to move, meanwhile, the fixed cylinder 2 positioned between the adapter ring 3 and the lens cone 1 is provided with the waist groove 4, so as to ensure that the guide pin 301 on the lens cone 1 moves back and forth along the direction of the waist groove 4, that the rotary motion of the adapter ring 3 is converted into the back and forth motion of the front lens group in the, the distance between the front lens group and the rear lens group is changed to realize the focusing function, so that the imaging quality of the lens is improved, wherein the waist groove 4 is a linear groove extending along the optical axis direction, and the curve groove 5 is ensured to drive the front lens group in the lens cone 1 to move back and forth.

As shown in fig. 5, the waist slot 4 extends along the moving direction of the guide pin 301, the curved slot 5 is arranged around the side wall of the adapting ring 3, the waist slot 4 forms a linear hole along the optical axis, the curved slot 5 forms a spiral duct along the optical axis for converting the rotary motion of the adapting ring 3 into the linear motion of the guide pin 301, and the guide pin 301 drives the lens barrel 1 to move back and forth; the fixed cylinder 2 and the rear lens group are enclosed to form a cavity, the lens cone 1 is accommodated in the cavity, the cavity provides a space for the lens cone 1 to move back and forth, the inner diameter of the cavity is matched with the outer diameter of the lens cone 1, the lens cone 1 is reduced to shake in the fixed cylinder 2, and the front lens group in the lens cone 1 is guaranteed to move along the optical axis direction.

One end of the guide nail 301 is provided with a guide sleeve 302, and the other end of the guide nail 301 passes through the waist groove 4 and the curve groove 5 in sequence and is arranged on the lens cone 1. The guide sleeve 302 can avoid the guide nail 301 from generating large displacement, and is favorable for improving the movement stability of the guide nail 301.

The front lens group comprises a front pressing ring 116, a first lens 101, a first spacing ring 102, a second lens 103, a second spacing ring 104, a third lens 105, a third spacing ring 106, a first cemented lens 107, a fourth spacing ring 108, a second cemented lens 109, an iris diaphragm 110, a medium pressing ring 111 and a third cemented lens 112 which are sequentially arranged along an optical axis. Increase first cemented lens 107, second cemented lens 109 and third cemented lens 112, be favorable to controlling aberration and chromatic aberration in optical system to improve the imaging effect of tight shot, but utility model does not regard this as the limit, can be according to actual imaging demand, the order of adjustment lens, in order to reach better imaging effect. The iris diaphragm 110 has a limiting effect on light beams in an optical system, and a user can adjust the position of the iris diaphragm 110 and adjust the size of an aperture according to actual imaging requirements so as to achieve a better imaging effect; the front pressing ring 116, the first spacer ring 102, the second spacer ring 104, the third spacer ring 106 and the fourth spacer ring 108 ensure enough distance between the lenses, so that the imaging effect of the optical system is improved.

The first lens 101 and the second lens 103 are meniscus lenses, the third lens 105 is a bi-moon lens, and the third cemented lens 112 is fixed in the lens barrel 1 through the middle lens holder 113. The middle lens base 113 ensures that the lenses have enough distance, thereby improving the imaging effect of the optical system.

The diaphragm shifting rod 114 is fixed on the side portion of the iris diaphragm 110, the diaphragm shifting ring 115 is fixed on the diaphragm shifting rod 114, the end portion of the diaphragm shifting rod 114 is connected with the dimming ring 305, the dimming ring 305 is sleeved on the fixed cylinder 2, and the dimming ring 305 is fixed on the outer side of the fixed cylinder 2 through the locking nail 307.

A plurality of guide nails 301 set up around lens cone 1, ensure that the guide nails 301 homoenergetic in 1 each side of lens cone drives preceding group of lens forward-backward motion simultaneously, guarantee the steady removal of following the optical axis direction of preceding group of lens, help improving the precision of camera lens adjustment.

The mechanism further comprises a focus ring 303, the focus ring 303 being fixed to the outer side of the adapter ring 3 by means of a first screw 306. The focusing ring 303 and the adapter ring 3 are fixedly connected by a first screw 306, which is helpful for improving the stability between the focusing ring 303 and the adapter ring 3, wherein the first screw 306 is an M1.6 flat head screw.

The end of the focusing ring 303 is sleeved with a fixing ring 304, and the fixing ring 304 fixes the focusing ring 303 through a locking pin 307. The fixed ring 304 is added to lock the rotation position of the focusing ring 303, the surface of the fixed ring 304 is provided with scales of the focusing ring 303 and the dimming ring 305, so that the rotation angle of the focusing ring 303 or the dimming ring 305 can be conveniently recorded, a user can conveniently and directly read the moving distance of the lens barrel 1 or the iris 110, and the operation error is reduced.

The rear lens group comprises a fourth lens 201, a fifth space ring 202, a fifth lens 203 and a rear pressing ring 204 which are sequentially arranged along an optical axis, wherein the fourth lens 201 is a biconvex lens, and the fifth lens 203 is a meniscus lens. The rear pressing ring 204 plays a role in fixing the lens, and prevents the lens from being displaced, so that the lens is not effective.

The end of the fixed cylinder 2 is sleeved with a bayonet 205, and the bayonet 205 is fixed to the end of the fixed cylinder 2 by a plurality of second screws 206. Increase bayonet 205, be convenient for install the camera lens in the camera, still be convenient for dismantle and install, bayonet 205 is fixed in the tip of solid fixed cylinder 2 through a plurality of second screws 206, not only helps improving the steadiness of bayonet 205 and solid fixed cylinder 2's tail end, still is convenient for change bayonet 205, improves the compatibility of camera lens.

The utility model discloses a theory of operation is:

when the focusing ring 303 rotates, the curved groove 5 of the adapter ring 3 is driven to rotate, the rotation motion is converted into the linear motion of the lens cone 1, namely, the linear motion of the front lens group is converted, the front lens group is ensured to move along the optical axis direction, the front lens group front-back motion is controlled, the waist groove 4 extends along the moving direction of the guide nail 301, the guide nail 301 is limited to move only front and back, namely, the lens cone 1 can only move back and forth, the front lens group is ensured to move along the optical axis direction, the distance between the front lens group and the rear lens group is changed, and the focusing function is.

When the dimming ring 305 rotates, the iris 110 is driven by the iris shift lever 114 and the iris shift ring 115 to move, so that the aperture size is adjusted.

Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. An optical lens, characterized in that: the optical device comprises a front lens group and a rear lens group which are arranged from an object space to an image space, the mechanical device comprises a lens cone (1), a fixed cylinder (2) of the lens cone (1) and a switching ring (3) which are sequentially sleeved, the front lens group is installed in the lens cone (1), the rear lens group is installed in the end part of the fixed cylinder (2), a guide nail (301) is fixed on the side part of the lens cone (1), the fixed cylinder (2) is provided with a waist groove (4) matched with the guide nail (301), the switching ring (3) is provided with a curve groove (5) matched with the guide nail (301), and the curve groove (5) drives the guide nail (301) to move back and forth along the direction of the waist groove (4) so as to change the distance between the front lens group and the rear lens group.

2. An optical lens as claimed in claim 1, characterized in that: the front lens group comprises a front pressing ring (116), a first lens (101), a first space ring (102), a second lens (103), a second space ring (104), a third lens (105), a third space ring (106), a first cemented lens (107), a fourth space ring (108), a second cemented lens (109), an iris diaphragm (110), a middle pressure ring (111) and a third cemented lens (112) which are sequentially arranged along an optical axis, the first lens (101) and the second lens (103) are meniscus lenses, the third lens (105) is a meniscus lens, and the third cemented lens (112) is fixed in the lens barrel (1) through a middle lens base (113).

3. An optical lens as claimed in claim 1, characterized in that: the waist groove (4) extends along the moving direction of the guide nail (301), and the curve groove (5) is arranged around the side wall of the rotary joint ring (3).

4. An optical lens as claimed in claim 3, characterized in that: the waist groove (4) forms a linear hole along the optical axis, and the curve groove (5) forms a spiral hole channel along the optical axis.

5. An optical lens as claimed in claim 3, characterized in that: a guide sleeve (302) is installed at one end of the guide nail (301), and the other end of the guide nail (301) sequentially penetrates through the waist groove (4) and the curve groove (5) to be installed on the lens cone (1).

6. An optical lens as claimed in claim 2, characterized in that: the side part of the iris diaphragm (110) is fixed with a diaphragm deflector rod (114), the diaphragm deflector rod (114) is fixed with a diaphragm deflector ring (115), the end part of the diaphragm deflector rod (114) is connected with a light adjusting ring (305), the light adjusting ring (305) is sleeved on the fixed cylinder (2), and the light adjusting ring (305) is fixed on the outer side of the fixed cylinder (2) through a locking nail (307).

7. An optical lens as claimed in claim 1, characterized in that: the mechanical device further comprises a focusing ring (303), and the focusing ring (303) is fixed on the outer side of the adapter ring (3) through a first screw (306).

8. An optical lens as recited in claim 7, wherein: the tip cover of focusing ring (303) is equipped with solid fixed ring (304), gu fixed ring (304) are fixed through check lock nail (307) focusing ring (303).

9. An optical lens as claimed in claim 1, characterized in that: the rear lens group comprises a fourth lens (201), a fifth space ring (202), a fifth lens (203) and a rear pressing ring (204) which are sequentially arranged along an optical axis, the fourth lens (201) is a biconvex lens, and the fifth lens (203) is a meniscus lens.

10. An optical lens as claimed in claim 1, characterized in that: the tip cover of fixed section of thick bamboo (2) is equipped with bayonet socket (205), bayonet socket (205) are fixed in through a plurality of second screw (206) the tip of fixed section of thick bamboo (2).