Lens transmission light splitting measurement jig

Abstract

The utility model relates to the technical field of lens transmission measurement, in particular to a lens transmission light splitting measurement jig. A lens positioning hole is formed in the top surface of the base; a base light through hole penetrating to the bottom surface of the base is formed in the bottom of the lens positioning hole; the conversion base is provided with a conversion base light through hole penetrating through the upper and lower end faces of the conversion base. And the lens positioning hole, the base light through hole and the conversion base light through hole are coaxially arranged. When the measuring instrument platform is used, the lens to be measured is ensured to be coaxial with the platform light through hole through the conversion seat and the base, and the measuring accuracy of the measuring instrument platform is improved.

Description

Technical Field

[0001] This utility model relates to the field of lens transmittance measurement technology, and in particular to a lens transmittance spectrophotometer. Background Technology

[0002] A lens transmittance measuring instrument is a specialized instrument used to measure parameters such as light transmittance in the optical performance of lenses. It is an indispensable measuring tool in the field of optical research. The light spot penetrates the lens and enters the measuring instrument through its light-transmitting aperture for measurement. Existing lens transmittance measuring instruments are generally used to measure plane mirrors, so there is no need to align the optical axis; the lens can be placed directly on the surface of the measuring instrument platform 3. However, in actual lens manufacturing, there are multiple lens structures, and the surface of the lens is often curved. Therefore, after the lens is placed on the surface of the measuring instrument platform 3, it is difficult for the optical axis of the lens to be coaxial with the light-transmitting aperture 301 on the measuring instrument platform, resulting in inaccurate measurements. Therefore, it is necessary to design a positioning fixture structure that can make the lens transmittance measuring instrument coaxial with the lens. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a lens transmission spectrophotometer.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] The present invention discloses a lens transmission spectrophotometer fixture, comprising a conversion base connected to a measuring instrument platform; a base detachably connected to the conversion base; a lens positioning hole provided on the top surface of the base; a base light-transmitting hole extending through to the bottom surface of the base provided at the bottom of the lens positioning hole; a conversion base light-transmitting hole extending through the upper and lower end faces of the conversion base provided on the conversion base; the lens positioning hole, the base light-transmitting hole, and the conversion base light-transmitting hole are all coaxially arranged.

[0006] Furthermore, a lower positioning shaft is provided at the bottom of the conversion seat.

[0007] Furthermore, the bottom of the base is provided with a base positioning shaft; the top surface of the conversion seat is provided with a base positioning hole that matches the base positioning shaft; the base positioning shaft is inserted into the base positioning hole.

[0008] Furthermore, the base is provided with a top cover; the bottom end face of the top cover is provided with a top cover positioning hole that matches the base; the base is inserted into the top cover positioning hole; the top of the top cover is provided with a top cover light-transmitting hole that communicates with the top cover positioning hole; the top cover light-transmitting hole and the base light-transmitting hole are coaxially arranged.

[0009] Furthermore, a chamfered surface of the top cover is provided around the inner wall of the positioning hole of the top cover and the bottom end face of the top cover.

[0010] With the above structure, the beneficial effects of this utility model are as follows: the platform light-transmitting hole on the measuring instrument platform is coaxially set with the light-transmitting hole of the conversion seat; the diameter of the lens positioning hole is equal to that of the lens to be tested, so after the lens to be tested is placed in the lens positioning hole, the optical axis of the lens to be tested is coaxial with the platform light-transmitting hole; the light source at the top passes through the lens to be tested, the base light-transmitting hole, the conversion seat light-transmitting hole and the platform light-transmitting hole in sequence before entering the measuring instrument platform for measurement; the conversion seat and the base ensure that the lens to be tested is coaxial with the platform light-transmitting hole, thereby improving the measurement accuracy of the measuring instrument platform. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model assembled on the measuring instrument platform;

[0012] Figure 2 This is an exploded view of the present invention assembled on a measuring instrument platform;

[0013] Explanation of reference numerals in the attached figures:

[0014] 1. Top cover; 101. Light-transmitting hole on top cover; 102. Positioning hole on top cover; 103. Chamfered surface of top cover;

[0015] 2. Base; 201. Base positioning shaft; 202. Lens positioning hole; 203. Base light transmission hole;

[0016] 3. Measuring instrument platform; 301. Platform light transmission hole; 4. Lens to be measured; 5. Converter base;

[0017] 501, Base positioning hole; 502, Lower positioning shaft; 503, Transmitting hole for conversion seat. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figures 1 to 2 As shown, the lens transmission spectrophotometer fixture of this utility model includes a conversion seat 5 connected to a measuring instrument platform 3; a base 2 is detachably connected to the conversion seat 5; a lens positioning hole 202 is provided on the top surface of the base 2; a base light-transmitting hole 203 is provided at the bottom of the lens positioning hole 202, extending to the bottom surface of the base 2; a conversion seat light-transmitting hole 503 is provided on the conversion seat 5, extending through both the upper and lower end faces of the conversion seat 5; the lens positioning hole 202, the base light-transmitting hole 203, and the conversion seat light-transmitting hole 503 are all coaxially arranged.

[0020] The measuring instrument platform is not fundamentally different from existing technologies, so it will not be discussed in detail here;

[0021] The platform light-transmitting hole 301 on the measuring instrument platform 3 is coaxially set with the light-transmitting hole 503 of the conversion seat; the lens positioning hole 202 has the same diameter as the lens 4 to be tested, so after the lens 4 to be tested is placed in the lens positioning hole 202, the optical axis of the lens 4 to be tested is coaxial with the platform light-transmitting hole 301; the light source at the top passes through the lens 4 to be tested, the light-transmitting hole 203 of the base, the light-transmitting hole 503 of the conversion seat and the light-transmitting hole 301 of the platform in sequence before entering the measuring instrument platform 3 for measurement; the conversion seat 5 and the base 2 ensure that the lens 4 to be tested is coaxial with the platform light-transmitting hole 301, thereby improving the measurement accuracy of the measuring instrument platform 3.

[0022] In a preferred embodiment of this utility model, the bottom of the conversion seat 5 is provided with a lower positioning shaft 502; the outer diameter of the lower positioning shaft 502 is equal to the diameter of the light-transmitting hole 301 of the platform; during the assembly of the conversion seat 5, the conversion seat 5 is installed in the light-transmitting hole 301 of the platform through a shaft-hole type fit; and the bottom surface of the conversion seat 5 is attached to the surface of the measuring instrument platform 3, which facilitates the replacement of the conversion seat 5.

[0023] In a preferred embodiment of this utility model, the bottom of the base 2 is provided with a base positioning shaft 201; the top surface of the conversion seat 5 is provided with a base positioning hole 501 that matches the base positioning shaft 201; the base positioning shaft 201 is inserted into the base positioning hole 501; the assembly of the base 2 and the conversion seat 5 is also completed by inserting the base positioning shaft 201 into the base positioning hole 501, which facilitates the replacement of different bases 2 and allows for the replacement of the same base 2 with different lens positioning hole 202 diameters according to the diameter of different lenses 4 to be tested.

[0024] In a preferred embodiment of this utility model, the base 2 is provided with a top cover 1; the bottom end face of the top cover 1 is provided with a top cover positioning hole 102 that matches the base 2; the base 2 is inserted into the top cover positioning hole 102; the top of the top cover 1 is provided with a top cover light-transmitting hole 101 that communicates with the top cover positioning hole 102; the top cover light-transmitting hole 101 and the base light-transmitting hole 203 are coaxially arranged.

[0025] The light-passing hole 101 on the top cover is the light-entry hole, and the diameter of the light-passing hole 101 on the top cover, the diameter of the light-passing hole 203 on the base, and the optical effective diameter of the lens 4 to be tested are equal. The top cover 1 ensures that the range of light entering the light-passing hole 203 on the base is within the optical effective diameter range of the lens 4 to be tested, reducing stray light entering the measuring instrument and making the measurement more accurate.

[0026] As a preferred embodiment of this utility model, a chamfered surface 103 is provided around the inner side wall of the upper cover positioning hole 102 and the bottom end face of the upper cover 1; a chamfered surface is also provided between the top surface of the base 2 and the outer side wall of the base 2. By providing guidance between the chamfered surface 103 of the upper cover and the chamfered surface of the base 2, it is convenient for the upper cover 1 to be placed on the base 2, making the measurement more convenient.

[0027] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A lens-transmitting spectrophotometer fixture, characterized in that: It includes a conversion seat (5) connected to the measuring instrument platform (3); a base (2) is detachably connected to the conversion seat (5); a lens positioning hole (202) is provided on the top surface of the base (2); a base light-transmitting hole (203) is provided at the bottom of the lens positioning hole (202) and extends to the bottom surface of the base (2); a conversion seat light-transmitting hole (503) is provided on the conversion seat (5) and extends to the upper and lower end faces of the conversion seat (5); the lens positioning hole (202), the base light-transmitting hole (203), and the conversion seat light-transmitting hole (503) are all coaxially arranged.

2. The lens transmission spectrophotometer fixture according to claim 1, characterized in that: The bottom of the conversion seat (5) is provided with a lower positioning shaft (502).

3. The lens transmission spectrophotometer fixture according to claim 1, characterized in that: The bottom of the base (2) is provided with a base positioning shaft (201); the top surface of the conversion seat (5) is provided with a base positioning hole (501) that matches the base positioning shaft (201); the base positioning shaft (201) is inserted into the base positioning hole (501).

4. The lens transmission spectrophotometer fixture according to claim 1, characterized in that: The base (2) is provided with a top cover (1); the bottom end of the top cover (1) is provided with a top cover positioning hole (102) that matches the base (2); the base (2) is inserted into the top cover positioning hole (102); the top of the top cover (1) is provided with a top cover light-transmitting hole (101) that communicates with the top cover positioning hole (102); the top cover light-transmitting hole (101) and the base light-transmitting hole (203) are coaxially arranged.

5. A lens transmission spectrophotometer fixture according to claim 4, characterized in that: The inner wall of the upper cover positioning hole (102) and the bottom end face of the upper cover (1) are provided with a chamfered surface (103) around the upper cover.

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