Condensing lens adjusting structure

Abstract

The invention discloses a collecting lens adjusting structure, which comprises a collecting lens, a light lens comprises a lens, the lens is made of an aluminum alloy material, a front-end lens surface is a concave aspheric surface, and a protective film is plated on the surface of the front-end lens surface. The lens can be cut and polished through a numerical control machine tool and is convenient to process, the material cost is only about one tenth of that of a traditional quartz plating double-layer film, the performance is stable, and the service life is long. And the up-and-down and left-and-right deflection angles of the condensing lens can be finely adjusted through an adjusting mechanism formed by the adjusting bolt and the compression spring. The supporting of the lens and the floating arrangement of the mirror shell are realized through the supporting spring, the spherical bolt and the rocking ring which are arranged in the mirror shell, so that the adjustment is convenient.

Description

Technical Field

[0001] The invention belongs to a fluorescence detection focusing lens, and in particular relates to a condenser adjustment structure. Background Art

[0002] The fluorescence detector mainly uses a light source to emit excitation light. After irradiating the fluorescent substance, the fluorescence emitted by the fluorescent substance is converted into monochromatic fluorescence through a monochromator and then irradiated onto the sample. The photomultiplier tube amplifies the received photocurrent and transmits it to the recorder to complete the detection.

[0003] At present, the existing condensers are all made of quartz mirrors that are coated with aluminum and then protected with a protective film. Because they face the xenon lamp directly and the working environment is also high temperature and heat, the aluminum film will age, curl, and fall off over time, which will reduce the reflected light. In order for the quartz mirror to meet the design requirements, it needs to be ground, which is very difficult, and needs to be coated with two different layers of film. The technology is complex, difficult, and costly.

[0004] In addition, after the light source emits the excitation light, a condenser is needed to condense and reflect it forward, and the reflected light needs to pass through the slit to the subsequent grating and other detection structures. In actual use, since the xenon lamp used as the fluorescent light source needs to be replaced with different models and specifications, the condenser needs to be fine-tuned after each replacement to ensure that the reflected fluorescence can pass through the slit. Therefore, how to simply and conveniently adjust the condenser is also a problem that needs to be solved at present. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a condenser adjustment structure, which can reduce the processing difficulty and cost of the condenser.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A condenser adjustment structure comprises a condenser, wherein the condenser comprises a lens, the lens is made of aluminum alloy, the front end mirror surface is a concave aspherical surface, and the surface is coated with a protective film.

[0008] The adjustment structure also includes a lens holder located on the back side of the condenser. The condenser is arranged on the lens holder through an elastic support mechanism. The lens holder is also provided with an adjustment component for adjusting the deflection of the condenser. The adjustment component includes symmetrically arranged adjustment bolts and compression springs. The tail of the adjustment bolt passes through the lens holder and abuts against the back of the condenser, and the compression spring abuts between the lens holder and the back of the condenser.

[0009] The condenser also includes a mirror housing and a retaining ring. The front end of the mirror housing is open and the outer edge has several bolt holes. The lens is adapted to the mirror housing and is arranged in the mirror housing through the opening. The retaining ring is arranged at the front end of the lens and is fixed to the mirror housing by passing bolts through corresponding bolt holes.

[0010] The rear part of the mirror housing also has a cavity protruding backwards, and an elastic support mechanism is arranged in the cavity, including a support spring and a support bolt. The inner circle of the cavity is an axially opened step hole, and the outer circle is an annular groove. The support spring is arranged in the annular groove and abuts against the lens and the mirror housing. A rocking ring with a conical inner hole is arranged in the step hole. One end of the support bolt is a ball head and cooperates with the conical inner hole of the rocking ring, and the other end passes through the rocking ring, the rear wall of the cavity, and the lens bracket in sequence and is fastened to the lens bracket through a nut.

[0011] The adjustment components have two groups, which are respectively arranged on the left and right sides and the upper and lower sides of the support bolt.

[0012] The rear end surface of the mirror housing is also provided with a corresponding guide column, and the compression spring is sleeved on the guide column.

[0013] The condenser adjustment structure of the present invention is adopted. Since the lens is made of aluminum alloy material, the mirror surface is only coated with a protective film, and can be cut and polished by a numerical control machine tool, which is convenient for processing. The material cost is only about one tenth of the traditional quartz double-layer film coating, and the performance is stable and the service life is long. In addition, the condenser adopts an elastic support mechanism arranged on the lens bracket, and the adjustment mechanism composed of an adjustment bolt and a compression spring is used to achieve fine adjustment of the up and down and left and right deflection angles of the condenser. The support of the lens and the floating setting of the mirror housing are achieved by the support spring, spherical bolt and shaking ring installed in the mirror housing for adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0015] Figure 1 A three-dimensional diagram of the condenser adjustment structure of the present invention installed on a light source box;

[0016] Figure 2 For Figure 1 A three-dimensional diagram of the structure of the lens bracket hidden on the base

[0017] Figure 3 is a three-dimensional schematic diagram of a condenser of the present invention;

[0018] Figure 4 is a cross-sectional view of the condenser adjustment structure of the present invention;

[0019] Figure 5 It is an enlarged schematic diagram of the elastic support mechanism of the present invention. DETAILED DESCRIPTION

[0020] A condenser adjustment structure of the present invention is as follows Figure 1-Figure 5 As shown, it is arranged at the rear of the light source box 1 to focus and reflect the fluorescence emitted by the xenon lamp 2. It mainly includes a condenser 3, and the condenser 3 includes a lens 33. The lens is made of aluminum alloy material, such as super-hard aluminum alloy, etc., and its front end mirror surface is a concave aspheric surface, and the surface is coated with a protective film. The lens of the present invention can be cut and polished by a CNC machine tool, which is convenient to process and reduces the aluminum plating mold process. The material cost is only about one-tenth of the traditional quartz double-layer film, and the performance is stable and the service life is long.

[0021] The adjustment structure also includes a mirror body bracket 4 located on the back side of the condenser 3. The condenser 3 also includes a cylindrical mirror housing 31 and a snap ring 34. The front end of the mirror housing 31 is open, and the outer edge has a plurality of protruding axial bolt holes 32. The lens 33 is adapted to the mirror housing 31. The lens 33 is arranged in the mirror housing 31 through the opening. The snap ring 34 is arranged in front of the lens 33 and the edge of the focusing surface of the lens 33 is fixed on the mirror housing 31 through the bolt 5 inserted into the corresponding bolt hole 32. The condenser 3 is arranged on the mirror body bracket 4 as a whole through an elastic support mechanism. The rear middle of the mirror housing 31 also has a cavity 35 protruding backwards, and an elastic support mechanism is arranged in the cavity 35, specifically including a support spring 36 and a support bolt 39, and an axial step hole 37 is opened in the center of the cavity 35, and an annular groove 44 is also provided outside the step hole 37 for limiting the support spring 36, one end of the support spring 36 is against the lens 33, and the other end is arranged in the annular groove 44 and against the rear wall of the cavity 35, and a rocking ring 38 with a conical inner hole is arranged in the step hole 37, and one end of the support bolt 39 is a ball head arranged in the cavity 35 and matched with the conical inner hole of the rocking ring 38, and the other end passes through the rocking ring 38, the rear wall of the cavity 35, and the mirror body bracket 4 in sequence, and is fastened to the mirror body bracket 4 through a nut 40. The elastic support mechanism can realize the support positioning of the lens 33 and meet the floating setting required for the deflection adjustment of the mirror housing 31.

[0022] The mirror body bracket 4 is also provided with two groups of adjustment components for adjusting the deflection of the condenser 3, each group of adjustment components includes symmetrically arranged adjustment bolts 41 and compression springs 42, that is, one group is provided on the left and right sides of the support bolt 39, and one group is provided on the upper and lower sides. The tail of the adjustment bolt 41 passes through the mirror body bracket 4 and abuts against the back of the mirror housing 31 of the condenser 3, and the compression spring 42 abuts between the mirror body bracket 4 and the back of the condenser 3. In addition, the rear end surface of the mirror housing 31 is also provided with two guide posts 43 that are integrated with the mirror housing 31 and correspond to the compression springs 42, and the compression springs 42 are respectively sleeved on the corresponding guide posts 43.

[0023] Thus, when the deflection angle of the condenser 3 needs to be adjusted, taking the left and right angle adjustment as an example, the condenser 3 can be deflected to the right as a whole by simply pushing the mirror housing 31 forward through the left adjusting bolt 41, and by moving the adjusting bolt 41 backward, the compression spring 42 on the right side deflects the condenser 3 to the left, so that the fluorescence reflected by the condenser 3 can pass through the slit. The same is true for the up and down angle adjustment.

[0024] However, those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A condenser adjustment structure, comprising a condenser, characterized in that: The condenser comprises a lens, the lens is made of aluminum alloy, the front end mirror surface is a concave aspherical surface, and the surface is coated with a protective film.

2. The condenser adjustment structure according to claim 1, characterized in that: The adjustment structure also includes a lens holder located on the back side of the condenser. The condenser is arranged on the lens holder through an elastic support mechanism. The lens holder is also provided with an adjustment component for adjusting the deflection of the condenser. The adjustment component includes symmetrically arranged adjustment bolts and compression springs. The tail of the adjustment bolt passes through the lens holder and abuts against the back of the condenser, and the compression spring abuts between the lens holder and the back of the condenser.

3. The condenser adjustment structure according to claim 2, characterized in that: The condenser also includes a mirror housing and a retaining ring. The front end of the mirror housing is open and the outer edge has several bolt holes. The lens is adapted to the mirror housing and is arranged in the mirror housing through the opening. The retaining ring is arranged at the front end of the lens and is fixed to the mirror housing by passing bolts through corresponding bolt holes.

4. The condenser adjustment structure according to claim 3, characterized in that: The rear part of the mirror housing also has a cavity protruding backwards, and an elastic support mechanism is arranged in the cavity, including a support spring and a support bolt. The inner circle of the cavity is an axially opened step hole, and the outer circle is an annular groove. The support spring is arranged in the annular groove and abuts against the lens and the mirror housing. A rocking ring with a conical inner hole is arranged in the step hole. One end of the support bolt is a ball head and cooperates with the conical inner hole of the rocking ring, and the other end passes through the rocking ring, the rear wall of the cavity, and the lens bracket in sequence and is fastened to the lens bracket through a nut.

5. The condenser adjustment structure according to claim 4, characterized in that: The adjustment components have two groups, which are respectively arranged on the left and right sides and the upper and lower sides of the support bolt.

6. The condenser adjustment structure according to claim 3, characterized in that: The rear end surface of the mirror housing is also provided with a corresponding guide column, and the compression spring is sleeved on the guide column.

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