Infrared transmission eccentric meter

Abstract

The invention relates to the technical field of optical lens detection, in particular to an infrared transmission eccentric meter which comprises a light source emitter, a lens fixing assembly and a light path output detector. The light source emitter comprises a light source, a convex lens and an image modulator which are sequentially arranged in the light incidence direction. The light source is located at an incident focus of the convex lens, light emitted by the light source is emitted to the image modulator in a parallel light beam form through the convex lens, and the image modulator can modulate and output a detection image in a light path. The convex lens is arranged on the light path of the emergent light source, so that the light source is arranged into the parallel light beams meeting the detection standard, and the situation that the detection precision is reduced due to the deviation between the incident light and the optical axis of the lens is avoided. The central optical axis of the lens can be driven to coincide with the rotating center of the lens fixing seat under the pushing of the plurality of arc-shaped lens fixing plates, so that deviation between the optical axis of the lens and the rotating shaft caused by assembly errors of the lens is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of optical lens detection, in particular to an infrared transmission eccentricity meter. Background Art

[0002] During the manufacturing process of optical lenses, the optical axis of the lens does not coincide with the rotational symmetry axis of the lens, which results in eccentricity error. The detection and evaluation of the eccentricity error of optical lenses is an essential step in the manufacture of high-precision optical lenses. The eccentricity error of optical lenses directly affects the imaging quality during final use.

[0003] At present, the method for detecting eccentricity error is to drive the lens to rotate to determine the rotation axis of the lens, use an autocollimator to project a parallel beam of crosshairs, focus it on a certain focal point through the lens to be detected, and then use another autocollimator with an appropriate objective lens to guide this focal point into the eyepiece or CCD camera to observe the reflected crosshairs. If the beam axis deviates from the mechanical rotation axis of the lens, the crosshairs observed by the eyepiece or on the screen will rotate around a certain center, and the rotation radius is the eccentricity of the lens after geometric conversion.

[0004] In the actual detection process, the parallel light beam projected by the autocollimator may have an angular deviation between the initial emitted light beam and the lens optical axis due to assembly errors. The lens installation deviation may also occur during the assembly process, resulting in the incident light beam being unable to be parallel to the lens optical axis, resulting in detection errors. Summary of the invention

[0005] In view of the technical problems existing in the prior art, the present invention provides an infrared transmission eccentricity meter to solve the problem of detection error in the above-mentioned lens eccentricity detection process, which may be caused by the assembly accuracy of the light source and the lens, resulting in the incident light beam being unable to be parallel to the lens optical axis.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: an infrared transmission eccentricity meter includes a light source emitter, a lens fixing assembly and an optical path output detector;

[0007] The light source transmitter comprises a light source, a convex lens and an image modulator which are sequentially arranged along the incident direction of the light; the light source is located at the incident focus of the convex lens, the light emitted by the light source is emitted to the image modulator as a parallel beam through the convex lens, and the image modulator can modulate and output a detection image in the optical path;

[0008] The lens fixing assembly comprises a lens fixing seat arranged in the emission light path of the image modulator, the lens fixing seat is provided with a centering fixture and a lens rotation driving member, the centering fixture can center and clamp the lens so that the lens optical axis coincides with the rotation axis, and the lens rotation driving member is used to drive the lens to rotate along the rotation axis;

[0009] The optical path output detector comprises an imaging plate and an image observation port which are sequentially arranged along the light emission direction of the lens; the imaging plate is used to receive the outgoing light beam of the detection image passing through the lens and generate the detection image.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the light source is an infrared laser.

[0012] Furthermore, the image modulator comprises a reflector and an image modulation plate which are sequentially arranged along the convex lens output pipeline and whose reflective surfaces are parallel to each other.

[0013] Furthermore, the lens fixing seat is provided with an optical path channel along the optical path; the centering fixture includes a plurality of groups of arc-shaped lens fixing plates evenly surrounding the optical path channel, and a pushing mechanism connected to the arc-shaped lens fixing plates; the pushing mechanism can drive the arc-shaped lens fixing plates to synchronously approach or move away from the optical path channel.

[0014] Furthermore, the pushing mechanism includes a turntable, a connecting rod, a sliding seat and a telescopic cylinder; the turntable is rotatably connected to the lens fixing seat and can deflect freely relative to the axis of the optical path; the sliding seat is connected to the arc-shaped lens fixing plate and slidably cooperates with a sliding groove on the lens fixing seat radially opened along the optical path; the two ends of the connecting rod are respectively hinged to the sliding seat and the turntable, and the telescopic cylinder is drivingly connected to the sliding seat.

[0015] Furthermore, the lens rotation driving component is arranged on an electric turntable driving component below the lens fixing seat.

[0016] Furthermore, the image modulation plate is either a chart plate or a graticule plate, which is used to generate a crosshair image.

[0017] Furthermore, the imaging plate is engraved with cross calibration lines corresponding to the cross mark image.

[0018] Furthermore, an eyepiece or a CCD camera is provided at the image observation port.

[0019] Moreover, the infrared transmission eccentricity meter provided by the present invention has at least the following advantages compared with the prior art:

[0020] Beneficial effects:

[0021] By placing a convex lens on the optical path of the outgoing light source, the light source can be arranged into a parallel light beam that meets the detection standard to avoid reducing the detection accuracy due to the deviation between the incident light and the lens optical axis.

[0022] During the lens assembly process, the multiple arc-shaped lens fixing plates can drive the central optical axis of the lens to coincide with the rotation center of the lens fixing seat, so as to ensure that the lens optical axis and the actual rotation axis are initially coincident, avoiding deviation between the lens optical axis and the rotation axis due to lens assembly errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a complete schematic diagram of the principle of the present invention;

[0024] Figure 2 It is a partial structural schematic diagram of the lens fixing assembly of the present invention;

[0025] Figure 3 It is a partial structural schematic diagram of the lens fixing assembly of the present invention from another viewing angle;

[0026] Figure 4 It is a schematic diagram of the principle of the light source transmitter of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the image modulator of the present invention.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] Light source transmitter 1, light source 1.1, convex lens 1.2, image modulator 1.3, 1.31 reflector 1.31, 1.32 image modulator plate 1.32;

[0030] Lens fixing assembly 2, lens fixing seat 2.1, arc lens fixing plate 2.2, sliding seat 2.3, turntable 2.4, connecting rod 2.5, telescopic cylinder 2.6, light beam guide tube 2.7, electric turntable driving member 2.8;

[0031] Light path output detector 3, imaging plate 3.1, image observation port 3.2;

[0032] Lens 4. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0035] like Figure 1-Figure 5As shown, the infrared transmission eccentricity meter designed by the present invention comprises a light source emitter 1, a lens fixing assembly 2 and a light path output detector 3;

[0036] The light source transmitter 1 comprises a light source 1.1, a convex lens 1.2 and an image modulator 1.3 which are arranged in sequence along the incident direction of the light; the light source 1.1 is located at the incident focus of the convex lens 1.2, and the light emitted by the light source 1.1 is emitted to the image modulator 1.3 as a parallel light beam through the convex lens 1.2, and the convex lens 1.2 first adjusts the emitted light into a parallel light beam to ensure that the emitted light is parallel to the optical axis of the lens to be detected; the image modulator 1.3 can then modulate and output the detection image in the optical path;

[0037] The lens fixing assembly 2 comprises a lens fixing seat 2.1 arranged in the emission light path of the image modulator 1.3, and a centering fixture and a lens rotation driving member are arranged on the lens fixing seat 2.1, the centering fixture can center and clamp the lens so that the lens optical axis coincides with the rotation axis, and the lens rotation driving member is used to drive the lens to rotate along the rotation axis;

[0038] The optical path output detector 3 comprises an imaging plate 3.1 and an image observation port 3.2 which are sequentially arranged along the light emission direction of the lens; the imaging plate 3.1 is used to receive the light beam emitted by the lens of the detection image and generate the detection image.

[0039] As an embodiment, the light source 1.1 is an infrared laser having a narrow spectral width and high monochromaticity, which enables them to selectively excite specific absorption characteristics of infrared materials and can be modulated by an image adjuster to output a more accurate detection image.

[0040] As an implementation mode, the image modulator 1.3 includes a reflector 1.31 and an image modulation plate 1.32 which are arranged in sequence along the output pipeline of the convex lens 1.2 and whose reflection surfaces are parallel to each other, so as to ensure that the detection image of the parallel light beam emitted by the convex lens 1.2 after being reflected by the reflector 1.31 and modulated by the image modulation plate 1.32 is still parallel to the optical axis of the lens to be detected, so as to avoid the reduction of detection accuracy due to the deviation between the incident light and the optical axis of the lens.

[0041] Specifically, the image modulation board 1.32 is a chart board or a graticule board, which is used to generate a cross-line image. By generating a cross-line image and projecting it behind the lens, as the lens rotates relative to the rotation axis, if there is a deviation between the optical axis and the rotation axis, the lens accuracy can be detected directly by observing whether the cross lines and the center line points of the cross-line image change.

[0042] As an implementation mode, the lens fixing seat 2.1 is provided with an optical path channel along the optical path; the centering fixture includes a plurality of groups of arc-shaped lens fixing plates 2.2 uniformly surrounding the optical path channel, and a pushing mechanism connected to the arc-shaped lens fixing plates 2.2; the pushing mechanism can drive the arc-shaped lens fixing plates 2.2 to synchronously approach or move away from the optical path channel, thereby ensuring that during the lens assembly process, the central optical axis of the lens can be driven to coincide with the rotation center of the lens fixing seat 2.1 under the push of the plurality of arc-shaped lens fixing plates 2.2.

[0043] Specifically, the pushing mechanism includes a turntable 2.4, a connecting rod 2.5, a sliding seat 2.3 and a telescopic cylinder 2.6; the turntable 2.4 is connected to the lens fixing seat 2.1 in rotation and can be freely deflected relative to the axis of the optical path; the sliding seat 2.3 is connected to the arc-shaped lens fixing plate 2.2 and is slidably matched with a slide groove provided on the lens fixing seat 2.1 along the radial direction of the optical path; the two ends of the connecting rod 2.5 are respectively hinged to the slide seat 2.3 and the turntable 2.4, and the telescopic cylinder 2.6 is connected to the slide seat 2.3 in driving. After the lens to be tested is pre-placed on the lens fixing seat 2.1, one group of sliding seats 2.3 is driven to move along the slide groove by the telescopic cylinder 2.6, and the other sliding seats 2.3 can be driven to move synchronously with the cooperation of the connecting rod 2.5, so that the lens to be tested is clamped in the center, ensuring the lens assembly accuracy, so as to avoid reducing the subsequent detection error.

[0044] Specifically, the lens rotation driving component is arranged on the electric turntable driving component 2.8 below the lens fixing seat 2.1. The purpose of the electric turntable driving component 2.8 is to drive the entire lens fixing seat 2.1 to rotate stably around the axis of the optical path channel to detect whether there is a deviation between the lens optical axis and the rotation axis. The electric turntable driving component 2.8 is an existing driving device and can also be driven by other rotation driving components, which will not be described in detail here.

[0045] In addition, a light beam guide 2.7 extending toward the lens is provided along the optical path below the lens fixing seat 2.1, so as to ensure that the detection image modulated by the image modulator 1.3 can be normally transmitted along the optical path through the light beam guide 2.7 while avoiding interference from ambient light.

[0046] As an implementation mode, the imaging plate 3.1 is engraved with cross calibration lines corresponding to the cross mark image. After the detection image is projected onto the lens, a cross mark pattern will be emitted correspondingly, and the projection will continue relative to the imaging plate 3.1. By comparing the cross mark pattern on the imaging plate 3.1 with the generated detection image to see if there is a deviation; and observing whether the position of the detection image fluctuates with the cross mark pattern when the lens rotates along the rotation axis; the eccentricity of the optical axis of the lens and the rotation axis can be measured by the fluctuation range or deformation degree of the cross mark presented in the detection image.

[0047] As an implementation manner, an eyepiece or a CCD camera is provided at the image observation port 3.2, and the observer can directly observe the detection image on the imaging plate 3.1 through the eyepiece, or the observer can observe the detection image on the imaging plate 3.1 through the CCD camera and then form an image on the screen.

[0048] It should be noted that, in this article, the terms "include", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0049] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other 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.

[0050] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An infrared transmission eccentricity meter, characterized in that: It includes a light source emitter, a lens fixing assembly and a light path output detector; The light source transmitter comprises a light source, a convex lens and an image modulator which are sequentially arranged along the incident direction of the light; the light source is located at the incident focus of the convex lens, the light emitted by the light source is emitted to the image modulator as a parallel beam through the convex lens, and the image modulator can modulate and output a detection image in the optical path; The lens fixing assembly comprises a lens fixing seat arranged in the emission light path of the image modulator, the lens fixing seat is provided with a centering fixture and a lens rotation driving member, the centering fixture can center and clamp the lens so that the lens optical axis coincides with the rotation axis, and the lens rotation driving member is used to drive the lens to rotate along the rotation axis; The optical path output detector comprises an imaging plate and an image observation port which are sequentially arranged along the light emission direction of the lens; the imaging plate is used to receive the outgoing light beam of the detection image passing through the lens and generate the detection image.

2. The infrared transmission eccentricity meter according to claim 1, characterized in that: The light source is an infrared laser.

3. The infrared transmission eccentricity meter according to claim 1, characterized in that: The image modulator comprises a reflecting mirror and an image modulation plate which are sequentially arranged along an exit pipeline of a convex lens and whose reflecting surfaces are parallel to each other.

4. The infrared transmission eccentricity meter according to claim 1, characterized in that: The lens fixing seat is provided with an optical path channel along the optical path; the centering fixture comprises a plurality of groups of arc-shaped lens fixing plates evenly surrounding the optical path channel, and a pushing mechanism connected to the arc-shaped lens fixing plates; the pushing mechanism can drive the arc-shaped lens fixing plates to synchronously approach or move away from the optical path channel.

5. The infrared transmission eccentricity meter according to claim 4, characterized in that: The pushing mechanism includes a turntable, a connecting rod, a sliding seat and a telescopic cylinder; the turntable is rotatably connected to the lens fixing seat and can freely deflect relative to the axis of the optical path; the sliding seat is connected to the arc-shaped lens fixing plate and slidably cooperates with a sliding groove on the lens fixing seat radially opened along the optical path; the two ends of the connecting rod are respectively hinged to the sliding seat and the turntable, and the telescopic cylinder is drivingly connected to the sliding seat.

6. The infrared transmission eccentricity meter according to claim 4, characterized in that: A light beam guide extending toward the lens is arranged along the light path below the lens fixing seat.

7. The infrared transmission eccentricity meter according to claim 1, characterized in that: The lens rotation driving component is arranged on the electric turntable driving component below the lens fixing seat.

8. The infrared transmission eccentricity meter according to claim 3, characterized in that: The image modulation board 1.32 is a chart board or a graticule board, which is used to generate a crosshair image.

9. The infrared transmission eccentricity meter according to claim 8, characterized in that: The imaging plate is engraved with cross calibration lines corresponding to the cross mark image.

10. The infrared transmission eccentricity meter according to claim 1, characterized in that: An eyepiece or a CCD camera is provided at the image observation port.

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