CN101813812B - CaF2Lens holding device and method thereof - Google Patents

Abstract

The invention relates to a _CaF2 lens clamping device, comprising a lens barrel, a first pressure ring and a second pressure ring arranged at both ends of the lens barrel; the radius of the inner surface of the first pressure ring is the same as the optical radius of the _CaF2 lens Adopt the clamping device of the present invention to clamp the lens, and the lens does not need to be grooved, which reduces the production cost of the CaF ₂ lens; Adopt the clamping device of the present invention to clamp the lens, reducing the pressure ring during clamping The clamping stress generated between the CaF ₂ lens greatly reduces the adjustment stress on the CaF ₂ lens, which is conducive to heat dissipation, disperses the adhesive stress of the glue on the CaF ₂ lens, and protects the CaF ₂ lens well. This makes the component suitable for a special use environment, and the processing cost is low.

Description

A kind of CaF2 lens clamping device and its method

technical field

The invention relates to a CaF ₂ lens clamping device and a method thereof.

Background technique

CaF ₂ lenses have been widely used in the infrared field. Due to the poor machining performance of this material, the cost of lenses made of this material is relatively high, and it is difficult to make CaF ₂ The lens meets the special use environment.

Contents of the invention

In order to solve the technical problems described in the background art, the present invention provides a CaF ₂ lens clamping device and its method, which can well ensure the imaging quality of the lens.

The technical solution of the present invention is: the present invention is a kind of CaF ₂ lens clamping device, and its special feature is: this device comprises lens barrel, the first pressure ring that is arranged on lens barrel two ends and the second pressure ring; The radius of the inside face of the first pressure ring is the same as the optical radius of the CaF ₂ lens.

The above-mentioned clamping device further includes a rubber gasket, and the rubber gasket is arranged on the inner side of the second pressure ring.

The above-mentioned lens barrel has symmetrical glue injection holes in the radial direction.

Threads are provided on the outer surfaces of the above-mentioned first pressure ring and the second pressure ring.

A kind of clamping method of _CaF2 lens, its special feature is that the method comprises the following steps:

1) Processing of pressure ring:

1.1) Firstly, through mechanical rough machining, the radius of the contact surface on the first pressure ring that contacts the lens is close to the optical radius of the lens;

1.2) Then, on the optical processing platform, use an optical template to make the radius of the contact surface of the rough-processed first pressure ring equal to the optical radius of the lens;

2) Adjust according to the optical design requirements:

2.1) First, fix the first pressure ring with glue to the lens barrel;

2.2) Next, put the CaF ₂ lens into the lens barrel with the first pressure ring as the installation reference plane;

2.3) Then put the rubber pad and the second pressure ring into the lens barrel in sequence, and dispense glue on the last few turns of the thread on the second pressure ring;

2.4) Check the stress condition of the CaF ₂ lens, and inject glue at the glue injection hole corresponding to the CaF ₂ lens on the lens barrel.

The present invention has the following advantages:

1, adopt clamping device and clamping method of the present invention to clamp lens, lens does not need to be grooved, has reduced the production cost of CaF ₂ lens;

2. Using the clamping device and clamping method of the present invention to clamp the lens, the contact between the press ring and the _CaF2 lens is surface contact, which can reduce the clamping produced between the press ring and the _CaF2 lens during clamping stress;

3. Using the clamping device and clamping method of the present invention to clamp the lens, the contact surface between the pressure ring and the CaF ₂ lens is relatively large, which is conducive to heat dissipation and avoids the large local heat in the later processing. , destroying the CaF ₂ lens;

4. Using the clamping device and clamping method of the present invention to clamp the lens, the processing cost of the pressure ring is relatively low, but the processing cost is relatively high when the lens barrel is directly processed into a surface with a radius;

5. Adopt the clamping device and clamping method of the present invention to clamp the lens. There is a rubber pad between the first pressure ring and the CaF ₂ lens, which can greatly reduce the adjustment stress on the CaF ₂ lens. CaF ₂ lens for protection, making the component suitable for special use environment;

6. Adopt the clamping device and the clamping method of the present invention to clamp the lens. Since there are symmetrical glue injection holes in the radial direction of the lens barrel, the sticking stress of the glue on the CaF ₂ lens can be dispersed, and the CaF ₂ lens can be fixed at the same time. Holds well in the lens barrel.

Description of drawings

Fig. 1 is CaF of the present invention The schematic diagram that lens holding device installs convex lens;

Fig. 2 is a schematic diagram of a CaF ₂ lens holding device of the present invention for installing a concave lens.

Detailed ways

Referring to Fig. 1, 2, CaF ₂ lens clamping device of the present invention comprises lens barrel 1, the first pressure ring 2 and the second pressure ring 3 that are arranged on the front and back ends of lens barrel 1; The optical radius of the CaF ₂ lens 4 is the same; the first pressure ring 2 and the second pressure ring 3 are arranged on both sides of the radial line of the lens barrel 1, leaving a space for installing the CaF ₂ lens 4 therebetween, wherein the CaF ₂ lens 4 can be Convex lenses may also be concave lenses.

In order to greatly reduce the installation and adjustment stress of the device on the CaF ₂ lens, and to protect the CaF ₂ lens well, so that the device can adapt to the special use environment, a rubber gasket 5 is also set in the device, and the rubber gasket 5 is set On the inner side of the second pressure ring 3 .

Simultaneously, in order to disperse the sticking stress of the glue to the CaF ₂ lens, the CaF ₂ lens is fixed well in the lens barrel simultaneously, the present invention is also provided with symmetrical glue injection hole 6, 7.

Threads are provided on the outer surfaces of the first pressure ring 2 and the second pressure ring 3 of the present invention.

The clamping method of _CaF2 lens of the present invention may further comprise the steps:

1) Processing of pressure ring:

1.1) Firstly, through mechanical rough machining, the radius of the contact surface on the first pressure ring that contacts the lens is close to the optical radius of the lens;

1.2) Then, on the optical processing platform, use an optical template to make the radius of the contact surface of the rough-processed first pressure ring equal to the optical radius of the lens;

2) Adjust according to the optical design requirements:

2.1) First, fix the first pressure ring with glue to the lens barrel;

2.2) Next, put the CaF ₂ lens into the lens barrel with the first pressure ring as the installation reference plane;

2.3) Then put the rubber pad and the second pressure ring into the lens barrel in sequence, and dispense glue on the last few turns of the thread on the second pressure ring;

2.4) Check the stress condition of the CaF ₂ lens, and inject glue at the glue injection hole corresponding to the CaF ₂ lens on the lens barrel.

Claims (1)

1. A method for clamping a _CaF lens, characterized in that: the method may further comprise the steps: 1) Processing of pressure ring: 1.1) Firstly, through mechanical rough machining, the radius of the contact surface on the first pressure ring that contacts the lens is close to the optical radius of the lens; 1.2) Then, on the optical processing platform, use an optical template to make the radius of the contact surface of the rough-processed first pressure ring equal to the optical radius of the lens; 2) Adjust according to the optical design requirements: 2.1) First, fix the first pressure ring with glue to the lens barrel; 2.2) Next, put the CaF ₂ lens into the lens barrel with the first pressure ring as the installation reference plane; 2.3) Then put the rubber pad and the second pressure ring into the lens barrel in sequence, and dispense glue on the last few turns of the thread on the second pressure ring; 2.4) Check the stress condition of the CaF ₂ lens, and inject glue at the glue injection hole corresponding to the CaF ₂ lens on the lens barrel.

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