CN110568600A - Variable-working-distance variable-magnification telecentric lens and use method thereof - Google Patents

Variable-working-distance variable-magnification telecentric lens and use method thereof Download PDF

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Publication number
CN110568600A
CN110568600A CN201910799125.8A CN201910799125A CN110568600A CN 110568600 A CN110568600 A CN 110568600A CN 201910799125 A CN201910799125 A CN 201910799125A CN 110568600 A CN110568600 A CN 110568600A
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CN
China
Prior art keywords
lens
variable
working
distance
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910799125.8A
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Chinese (zh)
Inventor
向先兵
陈铭勇
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Shenzhen Canrui Technology Co Ltd
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Shenzhen Canrui Technology Co Ltd
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Filing date
Publication date
Application filed by Shenzhen Canrui Technology Co Ltd filed Critical Shenzhen Canrui Technology Co Ltd
Priority to CN201910799125.8A priority Critical patent/CN110568600A/en
Publication of CN110568600A publication Critical patent/CN110568600A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B15/00Optical objectives with means for varying the magnification
    • G02B15/14Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group

Abstract

The invention discloses a variable-working-distance variable-magnification telecentric lens and a using method thereof, and the variable-working-distance variable-magnification telecentric lens comprises a lens, a first lens group, a diaphragm and a second lens group, wherein the lens comprises an object surface close to an object to be photographed and an image surface corresponding to the object surface during photographing, the first lens group, the diaphragm and the second lens group are sequentially arranged between the object surface and the image surface from the object surface to the image surface, the combination of the object surface, the first lens group, the diaphragm, the second lens group and the image surface of the lens can project light rays for photographing the object, the first lens group is a fixed lens group fixedly connected with the lens on the lens, and the second lens group is a movable lens group slidably connected with the lens on the lens. A method for using a variable-working-distance variable-magnification telecentric lens comprises the steps that when the variable-working-distance variable-magnification telecentric lens is used for changing the working distance in a variable-magnification mode, the relative positions of an aperture diaphragm and a first lens group and the lens are kept fixed, and a second lens group moves along a horizontal line.

Description

Variable-working-distance variable-magnification telecentric lens and use method thereof
Technical Field
The invention relates to a lens capable of changing working distance and magnification within a certain range, belonging to the technical field of optical lenses.
Background
In recent years, zoom lenses have been widely used, and interchangeable lens devices having a zoom imaging system and an image of variable magnification have been very popular. However, a key problem often exists in the production process of optical technology: for different fields of application, lenses with different working distances and different magnifications are often required, and in order to meet the requirement, a large number of mechanical parts such as lens barrels, space rings and the like and lenses comprising various parameters are often required to be produced. This is neither flexible, nor very costly, nor complicated in production.
The existing zoom lens can only change the magnification and cannot change the working distance; such a zoom system is often a fixed working distance, and zooming is realized by moving some lens group in the system along the optical axis. For example, see patent application No. 201520937346.4 which discloses a zoom system. The zoom system has a working distance which can not be adjusted, and consists of six lens groups which respectively have positive focal power, negative focal power, positive focal power and positive focal power, wherein the first lens group and the sixth lens group are fixed lens groups, and the second lens group, the third lens group, the fourth lens group and the fifth lens group are all movable lens groups.
in order to solve the technical problems, a new technical scheme is especially provided.
Disclosure of Invention
The invention aims to provide a variable-working-distance variable-magnification telecentric lens and a use method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a variable-working-distance variable-magnification telecentric lens, includes camera lens, first battery of lens, diaphragm and second battery of lens, the camera lens contains and is close to the object plane of the object of need shooing when shooing and the image plane corresponding with the object plane between object plane and the image plane, set gradually first battery of lens, diaphragm and second battery of lens by the direction of object plane to image plane, the light that is used for shooing the object can be thrown to the combination of the object plane of lens, first battery of lens, diaphragm, second battery of lens and image plane, first battery of lens is the fixed battery of lens with camera lens fixed connection on the camera lens, the second battery of lens is the mobile battery of lens with camera lens sliding connection on the camera lens.
Preferably, the first lens group and the second lens group are cemented lenses, respectively.
Preferably, the cemented lens is an achromatic double cemented lens.
Preferably, the sliding direction of the second lens is parallel to the horizontal line.
Preferably, the first lens group is fixedly connected with the lens through optical cement.
A method for using a variable-working-distance variable-magnification telecentric lens comprises the steps that when the variable-working-distance variable-magnification telecentric lens is used for changing the working distance in a variable-magnification mode, the relative positions of an aperture diaphragm and a first lens group and the lens are kept fixed, and a second lens group moves along a horizontal line.
Compared with the prior art, the invention has the beneficial effects that:
1. The variable-working-distance and variable-magnification telecentric lens is flexible and changeable, can effectively reduce the number of mechanical parts and optical parts, effectively reduces the production cost, and has higher imaging performance.
2. The variable-working-distance variable-magnification telecentric lens comprises two lens groups, so that the assembly accuracy is improved.
3. When the variable-working-distance variable-magnification telecentric lens is used for changing the magnification and the working distance, the relative position of the aperture diaphragm and the first lens group 1 is kept fixed, and the second lens group moves along the optical axis to realize the change of the working distance and the change of the magnification.
4. By matching with the optical parameters of the strictly designed lens group, the variable-working-distance variable-magnification telecentric lens can change the working distance and the magnification within a certain range, so that the view fields with different widths and images with different sizes can be obtained.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a reference diagram of the use state of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached drawings of the specification, the invention provides a technical scheme that: the utility model provides a variable-working-distance variable-magnification telecentric lens, including camera lens (not shown in the figure), first lens assembly 1, diaphragm 2 and second lens assembly 3, the camera lens contains and is close to the object plane 4 of the object of need shooing and image plane 5 corresponding with object plane 4 when shooing, between object plane 4 and image plane 5, set gradually first lens assembly 1, diaphragm 2 and second lens assembly 3 by object plane 4 to image plane 5's direction, the combination of the object plane 4 of lens, first lens assembly 1, diaphragm 2, second lens assembly 3 and image plane 5 can throw the light 6 that is used for shooing the object, first lens assembly 1 is the fixed lens assembly with camera lens fixed connection on the camera lens, second lens assembly 3 is the removal lens assembly with camera lens sliding connection on the camera lens.
Preferably, the first lens group 1 and the second lens group 3 are cemented lenses, respectively.
Preferably, the cemented lens is an achromatic double cemented lens.
Preferably, the sliding direction of the second lens is parallel to the horizontal line.
Preferably, the first lens group 1 is fixedly connected with the lens through optical cement.
A method for using a variable-working-distance variable-magnification telecentric lens comprises the steps that when the variable-working-distance variable-magnification telecentric lens is used for changing the working distance, the relative positions of an aperture diaphragm 2 and a first lens group 1 with the lens are kept fixed, and a second lens group 3 moves along a horizontal line.
The drawings are only for purposes of illustrating the principles of the invention as will be readily understood by those of ordinary skill in the art. Because of the limitation of the page size of the patent application document, in order to clearly present the principle, the proportional size between each component in the drawings may be inconsistent with the actual product, and it can be understood by those skilled in the art that, for example, the structural principle of highlighting a certain part in the drawings, the part is intentionally drawn to be larger, and the other part is too small, and the like, all of which can be understood in this situation.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Based on the situation that no product has advantages and disadvantages, the invention is only used for specific environments in the background technology, for example, scenes mentioned in the background technology, such as price factors, inconvenience in carrying and the like are considered by some users, the purchase of the application is not recommended, and the product is only used for and recommended to users who need to mention scenes in the background technology and can accept and ignore other negative factors.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a variable working distance variable magnification telecentric lens which characterized in that: including camera lens, first battery of lens, diaphragm and second battery of lens, the camera lens contains and is close to the object plane of the object of need shooing when shooing and the image plane corresponding with the object plane between object plane and the image plane, set gradually first battery of lens, diaphragm and second battery of lens by the direction of object plane to image plane, the light that is used for shooing the object can be thrown to the combination of the object plane of lens, first battery of lens, diaphragm, second battery of lens and image plane, first battery of lens be on the camera lens with camera lens fixed connection's fixed battery of lens, the second battery of lens be on the camera lens with camera lens sliding connection's removal battery of lens.
2. A variable-working-distance variable-magnification telecentric lens according to claim 1, wherein: the first lens group and the second lens group are respectively cemented lenses.
3. A variable-working-distance variable-magnification telecentric lens according to claim 2, wherein: the cemented lens is an achromatic double cemented lens.
4. A variable-working-distance variable-magnification telecentric lens according to claim 1, wherein: the sliding direction of the second lens is parallel to the horizontal line.
5. A variable-working-distance variable-magnification telecentric lens according to claim 1, wherein: the first lens group is fixedly connected with the lens through optical cement.
6. A use method of a variable-working-distance and variable-magnification telecentric lens is characterized in that: when the variable-working-distance variable-magnification telecentric lens is used for changing the working distance with variable magnification, the relative positions of the aperture diaphragm, the first lens group and the lens are kept fixed, and the second lens group moves along the horizontal line.
CN201910799125.8A 2019-08-28 2019-08-28 Variable-working-distance variable-magnification telecentric lens and use method thereof Pending CN110568600A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910799125.8A CN110568600A (en) 2019-08-28 2019-08-28 Variable-working-distance variable-magnification telecentric lens and use method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910799125.8A CN110568600A (en) 2019-08-28 2019-08-28 Variable-working-distance variable-magnification telecentric lens and use method thereof

Publications (1)

Publication Number Publication Date
CN110568600A true CN110568600A (en) 2019-12-13

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012173730A (en) * 2011-02-24 2012-09-10 Nikon Corp Zoom lens, optical device, and manufacturing method for zoom lens
CN103676114A (en) * 2012-09-07 2014-03-26 索尼公司 Imaging lens and imaging apparatus
CN209070213U (en) * 2018-09-21 2019-07-05 鹤山市嘉米基光电科技有限公司 A kind of outdoor projection camera lens
CN110174755A (en) * 2019-06-27 2019-08-27 东莞市宇瞳光学科技股份有限公司 A kind of zoom lens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012173730A (en) * 2011-02-24 2012-09-10 Nikon Corp Zoom lens, optical device, and manufacturing method for zoom lens
CN103676114A (en) * 2012-09-07 2014-03-26 索尼公司 Imaging lens and imaging apparatus
CN209070213U (en) * 2018-09-21 2019-07-05 鹤山市嘉米基光电科技有限公司 A kind of outdoor projection camera lens
CN110174755A (en) * 2019-06-27 2019-08-27 东莞市宇瞳光学科技股份有限公司 A kind of zoom lens

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