Large-aperture medium-wave telecentric lens

Abstract

The utility model discloses a large-aperture medium-wave telecentric lens, which relates to the technical field of lenses and comprises a lens body, the lens body is provided with a light supplementing unit, the light supplementing unit comprises a connecting cylinder, a reflecting cover and a fixing seat, and the connecting cylinder is used for being connected with the lens body; the reflecting cover is mounted in the connecting cylinder; a lens is fixedly arranged on the fixed seat, and the fixed seat is fixedly connected with the connecting cylinder; a plurality of lamp strips are sequentially arranged on the inner surface of the reflecting cover at equal intervals in the length direction of the reflecting cover, each lamp strip is of an annular structure and is connected with a switch through a controller, the controller and the switch are used for controlling the brightness of the lamp strips, the switch is arranged on the surface of the connecting cylinder, and a power source connected with the controller is arranged on the connecting cylinder. In actual use, the light supplementing device has the advantage of convenience in light supplementing, and the technical problem of looseness caused by mutual adjustment between the end cover and the connecting cylinder through threads can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lenses, in particular to a large-aperture medium-wave telecentric lens. Background Art

[0002] A telecentric lens is a high-end machine vision lens. Its characteristic is to eliminate the problem of different magnifications caused by the inconsistent distance between the measured object (or CCD chip) and the lens. Due to its unique technical advantages, the telecentric lens is currently particularly suitable for high-precision detection needs in mechanical parts measurement, plastic parts measurement, glass products and pharmaceutical parts measurement, electronic component measurement, etc., for precision measurement occasions.

[0003] The telecentric lens uses a semi-transparent and semi-reflective mirror in conjunction with a coaxial light source. The coaxial light source is set outside the lens barrel and extends into the lens barrel through a light hole opened on the lens barrel. This solution causes the semi-transparent and semi-reflective mirror to simultaneously project and reflect light, which seriously weakens the light that can be collected. In addition, the brightness of the light source must be increased to clearly capture the image.

[0004] The utility model, publication number CN217587839U, discloses a fill light assembly for a common-mode telecentric lens, comprising a fill light assembly connected to the end of the common-mode telecentric lens and an adjustment mechanism. The fill light assembly comprises a connecting tube, a reflective tube, and an LED lamp bead. The connecting tube has an internal curved portion, and the reflective tube has a reflective portion that matches the curved portion. The connecting tube and the reflective tube are threadedly connected. The reflective portion is provided with a plurality of LED lamp beads and a reflective layer. The adjustment mechanism comprises a clamping assembly and a convex lens. The clamping assembly is slidably mounted on the connecting tube and is used to clamp and secure the convex lens. In actual use, this utility model can achieve the purpose of internal fill light for a telecentric lens.

[0005] However, in actual use, the above-mentioned utility model requires adjustment through an adjustment structure, and the end cap and the connecting tube are connected by a thread. Long-term adjustment can easily damage the threads, resulting in an increase in the gap and a loosening between the end cap and the connecting tube, which increases the maintenance cost of the equipment in the later stage. Utility Model Content

[0006] The purpose of the utility model is to provide a large-aperture medium-wave telecentric lens, which has the advantage of convenient fill light in actual use and can avoid the technical problem of looseness caused by mutual adjustment between the end cover and the connecting tube through threads.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A large-aperture medium-wave telecentric lens includes a lens body, wherein the lens body is equipped with a fill light unit, and the fill light unit includes:

[0009] a connecting tube, the connecting tube being used to connect with the lens body;

[0010] a reflector, the reflector being installed in the connecting tube;

[0011] a fixing seat, on which a lens is fixedly mounted, and the fixing seat is fixedly connected to the connecting tube;

[0012] Among them, several light strips are arranged at equal intervals on the inner surface of the reflector along the length direction of the reflector. The light strips are annular in structure and are connected to a switch through a controller. The controller and the switch are used to control the brightness of the light strips. The switch is arranged on the surface of the connecting tube, and a power supply connected to the controller is arranged on the connecting tube.

[0013] The power source is a dry cell battery or a button cell battery.

[0014] Furthermore, the connecting tube and the lens body are detachably connected via a bayonet.

[0015] Preferably, the reflector and the connecting tube are connected together by bonding or threading.

[0016] Furthermore, in some preferred implementation cases, the fixing seat and the connecting tube are connected by snap fastening or threading.

[0017] Furthermore, in some preferred implementation cases, the switch is a knob-type control switch.

[0018] Furthermore, in some preferred implementation cases, a protective layer is provided on the surface of the connecting tube.

[0019] Furthermore, in some preferred implementation cases, the light strip is an LED light strip.

[0020] Furthermore, in some preferred implementation cases, the fixing seat includes a base and a pressure cover, the base is connected to the connecting tube, and both the base and the pressure cover are provided with mounting grooves that cooperate with the lens, and a plurality of buffer rings are provided on the mounting grooves by means of embedding, and the base and the end cover are connected by a snap fastener.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention mainly consists of a lens body and a fill light unit. The fill light unit is provided to fill light to the lens body to increase the brightness of the target object, thereby improving the imaging effect. In the present invention, a light strip is provided to provide a light source, and a reflector is provided to reflect light onto the lens. In the prior art, the position of the lens is adjusted so that the lens can be close to or away from the LED lamp bead, thereby achieving brightness adjustment. In the present application, the position of the light strip is fixed to the position of the lens, and the brightness of the light strip is adjusted by a switch and a controller, making the adjustment more convenient. At the same time, the power supply is provided by a power supply, so that the fill light unit can be installed separately on the lens body for use, reducing the connection of the lines. In actual use, the brightness can be adjusted by controlling the brightness of all the light strips and also by controlling the number of light strips that are turned on. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0025] Figure 2 This is a schematic diagram of the connection relationship between the fixing seat and the connecting tube of the utility model.

[0026] Figure 3 This is a schematic diagram of the connection between the light strip and the reflector of the present invention.

[0027] Reference numerals:

[0028] 101 lens body, 102 fill light unit, 103 connecting tube, 104 reflector, 105 fixing seat, 106 lens, 107 light strip, 108 switch, 109 base, 110 pressure cover, 111 buffer ring, 112 mounting slot. DETAILED DESCRIPTION

[0029] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0030] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0032] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0033] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0035] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] See Figure 1-Figure 3 This embodiment discloses a lens structure, specifically a large-aperture medium-wave telecentric lens, including a lens body 101, a fill light unit 102 installed on the lens body 101, and the fill light unit 102 including a connecting tube 103, a reflector 104, and a fixing seat 105. The connecting tube 103 is used to connect with the lens body 101; the reflector 104 is installed in the connecting tube 103; a lens 106 is fixedly mounted on the fixing seat 105, and the fixing seat 105 is fixedly connected to the connecting tube 103;

[0037] Among them, a number of light strips 107 are arranged at equal intervals on the inner surface of the reflector 104 along the length direction of the reflector 104. The light strip 107 is a ring structure. The light strip 107 is connected to the switch 108 through a controller. The controller and the switch 108 are used to control the brightness of the light strip 107. The switch 108 is set on the surface of the connecting tube 103, and the connecting tube 103 is provided with a power supply connected to the controller.

[0038] The present invention primarily comprises a lens body 101 and a fill light unit 102. The fill light unit 102 is provided to provide fill light to the lens body 101, thereby increasing the brightness of the target object and thereby improving the imaging effect. In the present invention, a light strip 107 is provided to provide a light source, and a reflector 104 is provided to reflect light onto a lens 106. In the prior art, the position of the lens 106 is adjusted to allow the lens 106 to move closer to or further from the LED light bead, thereby achieving brightness adjustment. In the present application, the position of the light strip 107 is fixed to the position of the lens 106, and the brightness of the light strip 107 is adjusted via a switch 108 and a controller, making adjustment more convenient and avoiding wear and tear. Furthermore, a power supply is provided, allowing the fill light unit 102 to be installed separately on the lens body 101, reducing wiring connections. In actual use, brightness adjustment can be achieved by controlling the brightness of all light strips 107, or even by controlling the number of light strips 107 that are turned on.

[0039] Furthermore, in some preferred implementation cases, the power source is a dry cell battery or a button cell battery, and dry cells are preferred in this embodiment.

[0040] Furthermore, in some preferred implementation cases, the connecting tube 103 and the lens body 101 are detachably connected via a bayonet mount, which may be an LPL bayonet mount, an E bayonet mount, or an EF bayonet mount.

[0041] The reflector 104 and the connecting tube 103 are connected together by bonding or screwing.

[0042] Furthermore, the fixing seat 105 is connected to the connecting tube 103 by snap fastening or threading.

[0043] The switch 108 is a knob-type control switch 108 , so that in actual use, the brightness can be adjusted by rotating the switch 108 .

[0044] In this application, the brightness of the light strip 107 can be controlled by the method in the prior art, and this application does not involve any improvement to the controller structure.

[0045] Furthermore, a protective layer is provided on the surface of the connecting tube 103 , and the protective layer can protect the connecting tube 103 .

[0046] Furthermore, the light strip 107 is an LED light strip.

[0047] In actual use, the inner wall of the reflector 104 is provided with a groove, and the light strip 107 is installed in the groove, so that the light strip 107 can be installed in a hidden manner and the shadow of the light strip 107 can be reduced.

[0048] Furthermore, the fixing seat 105 includes a base 109 and a pressure cover 110. The base 109 is connected to the connecting tube 103. Both the base 109 and the pressure cover 110 are provided with a mounting groove 112 that cooperates with the lens 106. Several buffer rings 111 are provided on the mounting groove 112 in an embedded manner. The base 109 is connected to the end cover by a snap fastener.

[0049] The base 109 is connected to the end cover by a snap-fit ​​method, which can realize the rapid assembly of the lens 106. At the same time, a buffer ring 111 is used to improve the buffer and quickly fix the lens 106 to avoid damage to the surface of the lens 106 due to relative rotation when using threaded installation.

[0050] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large-aperture medium-wave telecentric lens, comprising a lens body, wherein the lens body is equipped with a fill light unit, characterized in that: The fill light unit includes: a connecting tube, the connecting tube being used to connect with the lens body; a reflector, the reflector being installed in the connecting tube; a fixing seat, on which a lens is fixedly mounted, and the fixing seat is fixedly connected to the connecting tube; Among them, a number of light strips are arranged at equal intervals on the inner surface of the reflector along the length direction of the reflector. The light strip is annular in structure and is connected to a switch through a controller. The controller and the switch are used to control the brightness of the light strip. The switch is set on the surface of the connecting tube, and the connecting tube is provided with a power supply connected to the controller; the position of the light strip is fixed to the position of the lens, and the brightness of the light strip is adjusted by the set switch and controller to avoid adjustment wear.

2. The large-aperture medium-wavelength telecentric lens according to claim 1, characterized in that: The power source is a dry cell battery or a button cell battery.

3. The large-aperture medium-wavelength telecentric lens according to claim 1, characterized in that: The connecting tube and the lens body are detachably connected via a bayonet.

4. The large-aperture medium-wavelength telecentric lens according to claim 1, characterized in that: The reflector and the connecting tube are connected together by bonding or threading.

5. The large-aperture medium-wavelength telecentric lens according to claim 1, characterized in that: The fixing seat is connected to the connecting tube through a buckle or a thread.

6. The large-aperture medium-wavelength telecentric lens according to any one of claims 1 to 5, characterized in that: The switch is a knob-type control switch.

7. The large-aperture medium-wavelength telecentric lens according to claim 1, characterized in that: A protective layer is provided on the surface of the connecting tube.

8. The large-aperture medium-wavelength telecentric lens according to claim 1, characterized in that: The light strip is an LED light strip.

9. The large-aperture medium-wavelength telecentric lens according to any one of claims 1 to 5, characterized in that: The fixing seat includes a base and a pressure cover. The base is connected to the connecting tube. Both the base and the pressure cover are provided with mounting grooves that match the lens. Several buffer rings are provided on the mounting grooves by embedding. The base and the end cover are connected by a snap buckle.

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