Infrared optical system lens positioning tool

Abstract

An infrared optical system lens positioning tool belongs to the field of infrared optics and comprises a metal claw support, three mounting grooves are uniformly formed in the periphery of the metal claw support, a positioning ring is arranged in the middle of the top surface of the metal claw support, and a positioning hole penetrating through the metal claw support and the positioning ring is formed in the center of the metal claw support; a soft positioning claw block is inserted and fixed into the mounting groove, the lower portion of the positioning claw block exceeds the bottom face of the metal claw support, the exceeding portion is of a cambered surface step-shaped structure with the circle center facing inwards, the connecting face of a first step and a second step is an inclined face, a hard thin plate matched with the positioning claw block in radian is further arranged on the outer side of the positioning claw block, and the height of the hard thin plate is larger than that of the positioning claw block. The tool adopts a three-jaw design, and each positioning jaw block is inserted into a gap between the lens and the lens frame, so that the lens is centered in the lens frame; the main body part is made of brass or stainless steel, so that the main body part has large self weight, the lenses can be tightly pressed in the lens frame, and the contact parts of the fixing claws and the lenses are made of wear-resistant soft materials, so that the lenses cannot be damaged.

Description

Technical Field

[0001] The utility model belongs to the field of infrared optics, and in particular relates to a lens positioning tool for an infrared optical system. Background Art

[0002] Infrared objective lenses usually have the characteristics of round lenses, large lens diameter, low lens hardness, and high single-piece value. In addition, the finished infrared thermal imager will have a lot of impact vibration during use, so the side of the lens cannot directly contact the metal frame, and the optical axis cannot be positioned by mechanical hard installation. A utility model patent with a publication number of CN215986668U discloses an infrared optical system optical axis centering tool, which has a soft positioning block at the lower end and a hard pressure block at the upper end; the soft positioning block at the lower end is a three-claw disk with a cavity inside, and the three-claw disk has three equally spaced legs, and the legs are arc surfaces; a center column is set at the center of the three-claw disk, and the upper hard pressure block is sleeved through the center column. Although the tooling can improve the speed and accuracy of lens assembly, there is usually a certain gap between the side of the lens and the frame during assembly, and the three-claw plate cannot be well embedded in the gap, resulting in an insufficiently stable effect of fixing the lens. Moreover, since most of the tooling is made of lighter soft materials, external force is required to press the lens to the bottom of the frame during use. If the external force is not applied evenly, it may also cause a slight deviation in the installation position of the lens in the frame. Utility Model Content

[0003] The utility model aims to provide a lens positioning tool for an infrared optical system, which is more stable when grabbing the lens and more accurate when cleaning and installing the lens.

[0004] A lens positioning tool for an infrared optical system, characterized in that: it includes a metal claw support, three installation grooves are evenly arranged on the outer circumference of the metal claw support, a positioning ring is arranged in the middle of the top surface of the metal claw support, and a positioning hole is opened in the center to pass through the metal claw support and the positioning ring; a soft positioning claw block is inserted and fixed in the installation groove, the lower part of the positioning claw block protrudes beyond the bottom surface of the metal claw support, the protruding part is an arc-shaped stepped structure with the center of the circle inward, the connecting surface of the first step and the second step is an inclined surface, and a hard thin plate matching its curvature is also arranged on the outside of the positioning claw block, and the height of the hard thin plate is greater than the positioning claw block.

[0005] Furthermore, the metal claw support is made of brass or stainless steel, so that it has a large deadweight and can press the lens tightly into the frame.

[0006] Furthermore, the thickness of the inclined surface on the positioning claw block gradually increases from 0.5 mm to 1.5 mm.

[0007] The beneficial effects of the utility model are as follows: the utility model has three positioning plugs, and the plugs are designed to be arcuate trapezoidal slopes, so that not only can each positioning plug be inserted into the gap between the lens and the frame more fittingly, but the slope design can also fit the curvature of the top surface of the mirror, making the pressing effect more compact, and achieving centering of the lens in the frame while being more stable; the tooling adopts a split design, and the main body is made of brass or stainless steel, so that it has a large deadweight and can press the lens tightly in the frame, and the contact part between the positioning claw block and the lens is made of wear-resistant soft material, which will not cause damage to the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the top surface structure of the utility model.

[0009] Figure 2 It is a schematic diagram of the bottom structure of the utility model.

[0010] Figure 3 This is a schematic diagram of the use in Example 1.

[0011] Wherein: 1-metal claw support, 2-positioning ring, 3-positioning hole, 4-positioning claw block, 41-hard thin plate, 5-lens, 6-frame. DETAILED DESCRIPTION

[0012] Embodiment 1: A lens grabbing tool for an infrared optical system, comprising a metal claw support 1. The metal claw support is made of brass or stainless steel, so that it has a large deadweight and can press the lens into the frame. Three mounting grooves are evenly arranged on the outer periphery of the metal claw support 1. A positioning ring 2 is arranged in the middle of the top surface of the metal claw support 1. The positioning ring 2 is made integrally with the metal claw support 1, and a positioning hole 3 is provided in the center to penetrate the metal claw support and the positioning ring. A soft positioning claw block 4 is inserted and fixed in the mounting groove. The lower part of the positioning claw block 4 protrudes beyond the bottom surface of the metal claw support 1. The protruding part is an arc-shaped stepped structure with the center of the circle inward. The connecting surface between the first step and the second step is an inclined surface, and the thickness of the inclined surface gradually increases from 0.5 mm to 1.5 mm. A hard thin plate 41 matching its curvature is also arranged on the outer side of the positioning claw block 4, and the height of the hard thin plate 41 is greater than the positioning claw block 4.

[0013] When in use, put the lens 5 into the frame 6, adsorb the tooling on the robot arm with the pneumatic suction cup through the positioning ring 2, the shape and area of ​​the positioning ring match the pneumatic suction cup, and aim at the optical center point of the lens through the positioning hole 3 through the camera on the robot arm, and then put the tooling vertically below the robot, insert each positioning claw block 4 of the tooling into the gap between the lens 5 and the frame 6, and use the three positioning claw blocks 4 to position the lens 5 in the center of the frame 6; close the pneumatic suction cup, separate the tooling from the robot arm, and use the glue dispenser to pre-fix the fixed lens and the lens bracket with glue, and mainly avoid the three positioning claw blocks 4. Wait for the glue to dry before taking away the tooling through the robot arm for complete glue dispensing.

Claims

1. An infrared optical system lens positioning tool, characterized in that: It includes a metal claw support, three installation grooves are evenly arranged on the outer circumference of the metal claw support, a positioning ring is arranged in the middle of the top surface of the metal claw support, and a positioning hole is opened in the center to penetrate the metal claw support and the positioning ring; a soft positioning claw block is inserted and fixed in the installation groove, the lower part of the positioning claw block protrudes beyond the bottom surface of the metal claw support, the protruding part is an arc-shaped stepped structure with the center of the circle inward, the connecting surface of the first step and the second step is an inclined surface, and a hard thin plate matching its curvature is also arranged on the outer side of the positioning claw block, and the height of the hard thin plate is greater than the positioning claw block.

2. The infrared optical system lens positioning tool as claimed in claim 1, characterized in that The metal claw support is made of brass or stainless steel, so that it has a large deadweight and can press the lens tightly into the frame.

3. The infrared optical system lens positioning tool as claimed in claim 1, characterized in that The thickness of the inclined surface on the positioning claw block gradually increases from 0.5 mm to 1.5 mm.

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