Lens testing tool

Abstract

The name of the present invention is a lens testing tool. It belongs to the field of lens testing technology. It mainly solves the problems of long processing cycle, low tooling material utilization and high overall cost of traditional testing tools when used for lens testing. Its main features are: it is composed of a test main plate, a movable swing bar and a pressure strip; the test main plate is annular, and a graduation value is provided along the front of the ring; the movable swing bar is two swing arms whose ends are hinged on the test main plate, and the opposite sides of the two swing arms are provided with grooves for clamping the lens to be tested, and the bottom surface of the groove is provided with a through hole along the length direction; the pressure strip is a bar-shaped straight rod that cooperates with the through hole on the bottom surface of the swing arm. The present invention has the characteristics of a small number of parts, a simple structure and can meet the imaging quality test of lenses with different outer diameter specifications. It is mainly used for quickly clamping lenses of different specifications in lens testing.

Description

Technical Field

[0001] The present invention relates to the field of lens testing technology, and in particular to a lens testing tool with a maximum adjustable clamping range, a simple and easy-to-process structure, and fast and convenient clamping, and can be applied to imaging quality tests of lenses of different specifications. Background Art

[0002] In recent years, with the rapid development of security, surveillance, digital cameras, mobile phones and other fields, the market has tended to have higher requirements for the imaging quality of various types of lenses. How to test the imaging quality of lenses more quickly is particularly important in lens production.

[0003] Traditional test fixtures first require determining the fit and dimensions between the lens and fixture based on the structural features and dimensions of the lens mounting area. This manufacturing method results in long processing cycles, low tooling material utilization, and high overall costs. Summary of the Invention

[0004] The present invention provides a lens testing tool, the clamping range of which can be adjusted to a maximum extent, and the clamping operation is quick, and the tool can be applied to imaging quality tests of lenses with different outer diameter specifications.

[0005] The technical solution of the present invention is: a lens testing tool, characterized in that it is composed of a test main plate, a movable swing bar and a pressure bar; the test main plate is annular, and a graduation value is provided along the front of the ring; the movable swing bar is two swing arms whose ends are hinged to the test main plate, and the opposite sides of the two swing arms are provided with grooves for clamping the lens to be tested, and the bottom surface of the groove is provided with a through hole along the length direction; the pressure bar is a bar-shaped straight rod that cooperates with the through hole on the bottom surface of the swing arm.

[0006] The strip-shaped straight rod described in the technical solution of the present invention is provided with a short strip extending in a vertical direction of the strip-shaped straight rod.

[0007] The side surface of the short strip close to the strip-shaped straight rod and one of the inner side surfaces of the swing arm groove are located on the same plane in the technical solution of the present invention.

[0008] The two inner side surfaces of the swing arm groove described in the technical solution of the present invention are of different heights and have a step-shaped cross section; the inner side surface of the groove with the higher height is located on the same plane as the side surface of the short strip close to the straight bar.

[0009] The short strip described in the technical solution of the present invention is fixed at the middle part of the bar-shaped straight rod.

[0010] The strip-shaped straight rod described in the technical solution of the present invention is provided with a strip-shaped through hole along the length direction, and the strip-shaped through hole is equipped with a fixing component.

[0011] The fixing assembly described in the technical solution of the present invention includes a central fixing piece in the middle and side fixing pieces on both sides of the central fixing piece.

[0012] The middle fixing member and the side fixing members described in the technical solution of the present invention are both composed of screws and nuts; the short strip is fixed to the strip-shaped straight rod by the middle fixing member.

[0013] The movable pendulum bar described in the technical solution of the present invention is hinged on the back of the test main disk; the graduation values ​​on the front of the test main disk are engraved inner and outer circle graduation values.

[0014] The test main plate described in the technical solution of the present invention is composed of an annular upper plate, a lower plate and a fixing part connected therebetween; the fixing part is an arc-shaped fixing part distributed in two sections, and the spacing distance at one end of the two arc-shaped fixing parts is smaller than the spacing distance at the other end; the movable pendulum bar is hinged between the upper plate and the lower plate at the smaller spacing distance through a rotating shaft; the front of the upper plate is engraved with inner and outer circle graduation values.

[0015] The beneficial effect of the present invention is that the test fixture does not require re-manufacturing according to lens specifications. Instead, lenses with different outer diameters can be tested simply by adjusting the swing bar angle. This test fixture solves the problems of difficult, long, costly, and low-efficiency custom tooling. It is quick to operate and suitable for rapid clamping and testing of lens imaging quality.

[0016] The present invention features a small number of components, a simple structure, and compatibility with imaging quality testing for lenses with varying outer diameters. This not only reduces component mismatch errors but also addresses the challenges of custom tooling, which can be difficult, time-consuming, costly, and inefficient. The present invention is primarily used for rapidly clamping lenses of varying specifications during lens testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the implementation of the present invention, the following briefly introduces the drawings required for use in the embodiments.

[0018] Figure 1 Schematic diagram of the structure of the lens testing tool provided by an embodiment of the present invention.

[0019] Figure 2 It is a structural diagram of a master disk provided by an embodiment of the present invention.

[0020] Figure 3 It is a schematic diagram of the main structure of the movable pendulum bar provided by an embodiment of the present invention.

[0021] Figure 4 It is a side structural schematic diagram of the movable pendulum bar provided by an embodiment of the present invention.

[0022] Figure 5It is a schematic diagram of the main structure of the layering provided by an embodiment of the present invention.

[0023] Figure 6 It is a bottom view structural schematic diagram of the layering strip provided by an embodiment of the present invention.

[0024] The following are marked in the figure: 1. Test main plate, 1-1. Upper plate, 1-2. Lower plate, 1-3. Fixing part, 2. Movable swing bar, 3. Pressure bar, 3-1. Straight bar, 3-2. Fixing component, 3-3. Short bar, 4. Lens to be tested. DETAILED DESCRIPTION

[0025] like Figures 1 to 6 As shown, an embodiment of a lens testing tool of the present invention is composed of a testing main plate 1, a movable swing bar 2 and a pressure bar 3.

[0026] The test main plate 1 is in the shape of a ring and is composed of a circular upper plate 1-1, a lower plate 1-2 and a fixing part 1-3 connected therebetween. It plays a supporting role in the entire structure, and the movable pendulum bar 2 and the pressure bar 3 are both fixed thereon. The fixing part 1-3 is an arc-shaped fixing part distributed in two sections at intervals, and the two sections of the arc-shaped fixing parts have the same structure. The two sections of the arc-shaped fixing parts are symmetrically distributed. The distance between the adjacent ends of the two arc-shaped fixing parts is smaller, and the space between them is used to hinge the movable pendulum bar 2. The distance between the adjacent ends of the two arc-shaped fixing parts is larger, and the space between them is used to open and close the non-hinged end of the movable pendulum bar 2. The front of the upper plate 1-1 is engraved with two inner and outer circle graduation values. One can read the opening angle after the pendulum bar is opened, and the other can read the moving distance when the pressure bar 3 moves in a directional manner toward the center of the test main plate 1.

[0027] The movable swing bar 2 consists of two hinged bars at one end. The hinged end is hinged via a rotating shaft between the upper and lower plates 1-1 and 1-2 at the smaller spacing between the two arc-shaped fixtures. The non-hinged end extends between the upper and lower plates 1-1 and 1-2 at the larger spacing between the two arc-shaped fixtures. The other ends of the two swing bars can open and close within a certain angular range. Opposing sides of the movable swing bar 2 are provided with grooves for clamping the lens 4 to be tested. The bottom of these grooves is provided with strip-shaped through-holes or evenly spaced gaps along their length for the clamping bar 3 to pass through and move up and down, serving as a track for the clamping bar 3 to move toward the center of the circle. The inner side surfaces of the swing bar grooves are of different heights, narrower at the top and wider at the bottom, with the wider portion protruding outward in a stepped manner.

[0028] The pressure strip 3 consists of a straight bar 3-1, a fixing assembly 3-2, and a short bar 3-3. The straight bar 3-1 engages with the through-holes on the bottom surface of the swing bar. The straight bar 3-1 is provided with through-holes along its length. The through-holes of the straight bar 3-1 are fitted with the fixing assembly 3-2. The fixing assembly 3-2 includes a central fixing member and side fixing members on either side of the central fixing member. Both the central fixing member and the side fixing members are constructed from screws and nuts. The short bar 3-3 is fixed to the center of the straight bar 3-1 by the central fixing member. The short bar 3-3 extends outward perpendicularly from the straight bar 3-1. The side of the short bar 3-3 that abuts the straight bar 3-1 is flush with the inner side of the higher groove in the swing bar, ensuring stable placement of the lens 4 under test during testing. The pressure strip 3 serves as a positioning edge, ensuring that the lens 4 under test is centered on the test master plate 1 based on its outer diameter. After the position of the holding bar 3 is determined, the two swing arms of the movable swing bar 2 are opened to a certain angle to stably place the lens to be tested 4 at the center of the tooling test system.

[0029] By calculating the distance that the holding bar 3 must move in a directional manner along the center of the test plate 1, as well as the angle at which the two swing bars open, the perimeter of the lens under test 4 is aligned with the three sides of the "triangular" structure, creating an adjustable fixture for rapid clamping. This simple triangular mechanical structure achieves a maximum clamping adjustment range within a limited range simply by calculating the directional movement of the holding bar 3. This ensures that the lens under test 4 is stably positioned at the center of the test system, maintaining its clear aperture and meeting the imaging quality requirements of lenses with varying outer diameters.

[0030] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A lens testing tool, characterized by: The invention is composed of a test main plate (1), a movable swing bar (2) and a pressure bar (3); the test main plate (1) is annular, and is composed of an upper plate (1-1), a lower plate (1-2) and a fixing member (1-3) connected therebetween; the fixing member (1-3) is an arc-shaped fixing member distributed at intervals between two sections, the interval between one end of the two arc-shaped fixing members is smaller than the interval between the other ends, and two inner and outer circle graduation values ​​are engraved along the front side of the ring; the movable swing bar (2) is a pair of swing arms, one end of which is hinged to the upper plate (1-1) and the lower plate (1-2) at the smaller interval on the test main plate (1) through a rotating shaft, and the other end is connected from the upper plate (1-1) to the lower plate at the larger interval between the two arc-shaped fixing members. (1-2), the two swing arms are provided with grooves for clamping the lens to be tested (4) on the opposite sides, and the bottom surface of the groove is provided with a through hole along the length direction; the pressure strip (3) is a strip straight rod (3-1) that matches the through hole on the bottom surface of the swing arm, and the strip straight rod (3-1) is provided with a strip through hole along the length direction, and the strip through hole is equipped with a fixing assembly (3-2), and the fixing assembly (3-2) includes a middle fixing piece in the middle and side fixing pieces on both sides of the middle fixing piece; the strip straight rod (3-1) is provided with a short strip (3-3) extending in the vertical direction of the strip straight rod (3-1), and the side surface of the short strip (3-3) close to the strip straight rod (3-1) is located on the same plane as one of the inner side surfaces of the swing arm groove.

2. The lens testing tool according to claim 1, characterized in that: The two inner side surfaces of the swing arm groove are of different heights and have a step-shaped cross section; the inner side surface of the groove with the higher height is located on the same plane as the side surface of the short strip (3-3) close to the strip-shaped straight rod (3-1).

3. The lens testing tool according to claim 2, characterized in that: The short strip (3-3) is fixed to the middle of the strip-shaped straight rod (3-1).

4. A lens testing tool according to claim 1, 2 or 3, characterized in that: The middle fixing member and the side fixing member are both composed of screw rods and nuts; the short strip (3-3) is fixed on the strip-shaped straight rod (3-1) by the middle fixing member.

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