Device for preventing light passing surface of gain medium from being damaged by stray light

Abstract

The utility model discloses a device for preventing stray light from causing damage to a light passing surface of a gain medium, which comprises a fixing seat, a crystal positioning cover, the gain medium, a crystal gland and a diaphragm, the crystal positioning cover is fixed on the fixing seat, the gain medium penetrates through a central hole of the crystal positioning cover and is fastened on the crystal positioning cover through the crystal gland, and the diaphragm is fixed on the crystal positioning cover. And the diaphragm is fastened on the crystal gland and is fastened through the diaphragm gland. According to the device for preventing the stray light from damaging the light passing surface of the gain medium provided by the utility model, the diaphragm made of high-molecular polymer is adopted to prevent the stray light from irradiating the sealing ring part; meanwhile, the diaphragm gland is used for fastening the diaphragm, it is ensured that the diaphragm cannot move in the using process, and the vibration requirement is met on the premise that the vibration requirement is met, so that the vibration effect is improved, and the service life of the diaphragm is prolonged. And the reliability of the solid laser is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of solid lasers, and in particular relates to a device for preventing the light-passing surface of a gain medium from being damaged due to stray light. Background Art

[0002] Stray light is a general term for abnormal transmission light in an optical system. For an imaging optical system, stray light will increase the noise on the image plane. In particular, the stray light convergence points near the image plane will have a serious impact on the imaging.

[0003] Light leakage, residual reflection from the transmitted optical surface, and residual reflection from non-optical surfaces such as the inner wall of the cavity are easily generated in the optical system of a high-energy solid-state laser. At the same time, scattered light will be generated due to optical surface quality problems, and the infrared optical system will also generate stray light due to the system's own thermal radiation.

[0004] The specific reason for the damage of the light-transmitting surface of the gain medium of most high-energy solid-state lasers is the presence of stray light irradiating the seal. The sealing ring will volatilize some gas or smoke due to the irradiation of stray light and be absorbed by the light-transmitting surface of the gain medium, resulting in excessive heat absorption at a local position, and ultimately causing damage to the light-transmitting surface.

[0005] Therefore, it is of great practical significance to design a device to avoid damage to the light-transmitting surface of the gain medium caused by stray light. Utility Model Content

[0006] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide a device for preventing the light-transmitting surface of the gain medium from being damaged due to stray light.

[0007] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the utility model is:

[0008] A device for preventing the light-transmitting surface of a gain medium from being damaged due to stray light comprises a fixing seat, a crystal positioning cover, a gain medium, a crystal pressure cover and an aperture, wherein the crystal positioning cover is fixed on the fixing seat, the gain medium passes through the crystal positioning cover and is fastened to the crystal positioning cover by the crystal pressure cover, and the aperture is fastened to the crystal pressure cover.

[0009] Furthermore, the crystal positioning cover is fastened to the fixing seat by a crystal positioning cover fastener.

[0010] Furthermore, the fixing seat is coaxially arranged with the crystal positioning cover.

[0011] Furthermore, a sealing ring I is installed at the sealing position between the outer periphery of the crystal positioning cover and the fixing seat.

[0012] Furthermore, a sealing ring II is provided on the periphery of the gain medium to form a sealing angle.

[0013] Furthermore, the crystal pressure cover is fastened to the crystal positioning cover by a crystal pressure cover fastener.

[0014] Furthermore, the diaphragm is fastened to the crystal cover via an diaphragm cover.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model discloses a device for preventing the light-passing surface of a gain medium from being damaged due to stray light. The device adopts an aperture made of a high molecular polymer. The aperture has excellent heat resistance and cold resistance, can be used for a long time at -180 to 260°C, has the characteristics of acid resistance, alkali resistance, and resistance to various organic solvents, and is almost insoluble in all solvents. The aperture is white and can reflect part of the stray light. The aperture is set to block the stray light from irradiating to the sealing ring, thereby blocking the sealing ring from volatile gas or smoke due to the irradiation of the stray light, which is adsorbed by the light-passing surface of the gain medium, resulting in excessive heat absorption at a local position and ultimately causing damage to the light-passing surface. At the same time, the aperture pressure cover is used to tighten the aperture to ensure that the aperture cannot move during use. On the premise of ensuring that the aperture meets the vibration requirements, the reliability of the solid laser is greatly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 For this utility model Figure 1 Middle BB section view;

[0019] Figure 3 For this utility model Figure 2 A partial enlarged view of point Ⅰ in the middle. DETAILED DESCRIPTION

[0020] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0022] like Figure 1-3As shown, a device for preventing the light-transmitting surface of a gain medium from being damaged due to stray light comprises a fixing seat 1, a crystal positioning cover 2, a sealing ring I3, a gain medium 4, a sealing ring II5, a crystal pressure cover 6, an aperture 7 and an aperture pressure cover 8, wherein the crystal positioning cover 2 is fastened to the fixing seat 1 by a crystal positioning cover fastener 21, the fixing seat 1 is coaxially arranged with the crystal positioning cover 2, the sealing ring I3 is installed at the periphery of the crystal positioning cover 2 and at a sealing position between the fixing seat 1, the gain medium 4 passes through the central hole of the crystal positioning cover 2, the sealing ring II5 is installed at the periphery of the gain medium 4 and forms a sealing angle 62, the gain medium 4 is pressed by the crystal pressure cover 6 and the crystal pressure cover is used to tighten Firmware 61 fastens the crystal cover 6 to the crystal positioning cover 2, and the aperture 7 is fastened to the crystal cover 6 through the aperture cover 8. The material of the aperture 7 is a high molecular polymer, which has excellent heat resistance and cold resistance. It can be used for a long time at -180 to 260°C, and is resistant to acid, alkali, and various organic solvents. It is almost insoluble in all solvents. The color of the aperture 7 is white, which can reflect part of the stray light. By setting the aperture 7, the stray light can be blocked from irradiating to the sealing ring, thereby preventing the sealing ring from evaporating part of the gas or smoke due to the irradiation of the stray light and being adsorbed by the light-transmitting surface of the gain medium 4, resulting in excessive heat absorption at the local position and ultimately causing damage to the light-transmitting surface.

[0023] A method for preventing a gain medium from being damaged by stray light comprises the following steps:

[0024] a. Install the sealing ring I3 on ​​the crystal positioning cover 2, and use the crystal positioning cover fastener 21 to fasten the crystal positioning cover 2 on the fixing seat 1. The crystal positioning cover 2 plays the role of keeping the gain medium 4 at the center of the product optical axis;

[0025] b. Pass the gain medium 4 through the center hole of the crystal positioning cover 2, and use a cotton swab to install the sealing ring II5 on the periphery of the gain medium 4 to form a sealing angle 62, which is a sealing angle such as a rounded corner / chamfered corner / flat end to ensure the sealing of the device, and at the same time use a crystal pressure cover 6 to press the gain medium 4, and use a crystal pressure cover fastener 61 to fasten the crystal pressure cover 6;

[0026] c. Install the aperture 7 on the crystal gland 6. The material of the aperture 7 is white polytetrafluoroethylene, including but not limited to materials that can cause diffuse reflection of stray light, such as white aluminum nitride, alumina ceramics, POM, etc.;

[0027] d. Use tweezers to clamp the aperture gland fastening port 81, rotate the tweezers, and fasten the aperture gland 8 to the crystal gland 6;

[0028] e. When stray light hits the sealing aperture, it will be completely blocked by the aperture 7, preventing the stray light from affecting the seal and increasing the reliability of the device.

[0029] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A device for preventing damage to the light-transmitting surface of a gain medium caused by stray light, characterized in that: It comprises a fixing seat, a crystal positioning cover, a gain medium, a crystal pressure cover and an aperture. The crystal positioning cover is fixed on the fixing seat, the gain medium passes through the crystal positioning cover and is fastened to the crystal positioning cover through the crystal pressure cover, and the aperture is fastened to the crystal pressure cover.

2. A device for preventing damage to the light-transmitting surface of a gain medium caused by stray light according to claim 1, characterized in that: The crystal positioning cover is fastened to the fixing seat by a crystal positioning cover fastener.

3. The device for preventing the light-transmitting surface of a gain medium from being damaged due to stray light according to claim 1, characterized in that: The fixing seat is coaxially arranged with the crystal positioning cover.

4. The device for preventing the light-transmitting surface of a gain medium from being damaged due to stray light according to claim 1, characterized in that: A sealing ring I is installed at the sealing position between the outer periphery of the crystal positioning cover and the fixing seat.

5. The device for preventing the light-transmitting surface of a gain medium from being damaged due to stray light according to claim 1, characterized in that: A sealing ring II is arranged on the periphery of the gain medium to form a sealing angle.

6. The device for preventing the light-transmitting surface of a gain medium from being damaged due to stray light according to claim 1, characterized in that: The crystal pressure cover is fastened to the crystal positioning cover by a crystal pressure cover fastener.

7. The device for preventing the light-transmitting surface of a gain medium from being damaged due to stray light according to claim 1, characterized in that: The diaphragm is fastened to the crystal cover through the diaphragm cover.

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