CN213814071U

CN213814071U - Optical window

Info

Publication number: CN213814071U
Application number: CN202023156741.9U
Authority: CN
Inventors: 李启龙
Original assignee: Dongguan Environmental Testing Equipment Co ltd
Current assignee: Dongguan Environmental Testing Equipment Co ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-07-27
Anticipated expiration: 2030-12-24

Abstract

The utility model relates to an optical window, which is provided with a supporting body, a first optical glass and a second optical glass, wherein the first optical glass and the second optical glass are connected with the supporting body through a detachable structure; the inner cavity of the support body forms a closed cavity under the encapsulation of the first optical glass and the second optical glass, and the inner cavity is filled with low dew point dry air under a vacuum environment. The optical window provided by the utility model can ensure that various performance indexes of the optical window meet the experimental requirements when in use; the optical window adopts detachable design's mode, can wholly conveniently demolish from high low temperature test box, can dismantle optical window or reserve optical window back alternate use, and the intermediate level of intermediate separation injects low dew point dry air, can avoid outside optical glass surface to frost, ensures optical window normal use under the low temperature state.

Description

Optical window

Technical Field

The utility model belongs to the technical field of the optical detection technique and specifically relates to an optical window is related to.

Background

The study shows that the temperature change has a great influence on the image quality of the photoelectric imaging system. The photoelectric imaging system needs to have a specific temperature working range, and in special cases, the photoelectric imaging system needs to work normally in a temperature environment of-40 ℃ to 50 ℃, and the influence of temperature change on image quality must be concerned. The optical window is an essential optical component in high and low temperature optical tests, and the quality of the material and the structure of the optical window can affect the success or failure of the optical tests. However, the conventional optical window is inconvenient to assemble, use and maintain due to insufficient structural design, and during a high-temperature and low-temperature (below zero degrees centigrade) test, the window is frosted at the normal temperature side due to the temperature gradient at the two sides of the window, so that the optical imaging is blurred, and the test fails. In the existing optical window, the optical glass is sealed and packaged in a manner of sealing an oil ring, but after a long time, the oil ring is squeezed due to stress, so that the oil ring is deformed, and finally the sealing effect is poor. Meanwhile, other treatment modes of the existing optical window, such as plating an electric heating wire on the surface of the optical glass or blowing hot air to the surface of the optical glass outside the high-low temperature box, can heat the surface of the optical glass to prevent frosting during a low-temperature operation test, and similar treatment modes can cause that the surface shape precision of the surface of the optical glass cannot meet the requirement, so that the optical test cannot be normally carried out under the low-temperature condition.

Disclosure of Invention

An object of the utility model is to provide an optical window, under high low temperature environment, can guarantee that the fine light beam that satisfies the emulation light source and send sees through, and can prevent optical glass surface under the low temperature situation, optical glass surface frosting, the phenomenon of condensation.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an optical window, comprising:

the support body is cylindrical, a first attaching part and a second attaching part are respectively formed at two ends of the support body, a first flange part and a functional hole are arranged on the periphery of the support body, and the functional hole is communicated with an inner cavity of the support body;

the first optical glass is tightly attached to the first attaching part and is fixed through a first fixing ring, and the first fixing ring is connected with the support body through a detachable structure;

the second optical glass is tightly attached to the second attaching part and is fixed through a second fixing ring, and the second fixing ring is connected with the support body through a detachable structure;

the inner cavity of the support body forms a closed cavity under the encapsulation of the first optical glass and the second optical glass, and the inner cavity is filled with low dew point dry air under a vacuum environment.

The supporting body is a round barrel, and the first attaching part and the second attaching part are outward flanging structures on the corresponding ends of the supporting body; first laminating portion realizes laminating simultaneously and connects first optical glass and the solid fixed ring of first, and the laminating simultaneously of second laminating portion is realized connecting second optical glass and the solid fixed ring of second.

The above scheme is further that the first fixing ring is provided with a second flange part and a first outer convex ring protruding from the second flange part, the inner side of the outer end of the first outer convex ring is provided with a first inner clamping table, and the first optical glass is embedded in the first outer convex ring and clamped on the corresponding side surface by the first inner clamping table; the second fixing ring is provided with a third flange part and a second outer convex ring protruding from the third flange part, a second inner clamping table is arranged on the inner side of the outer end of the second outer convex ring, and the second optical glass is embedded in the second outer convex ring and clamped on the corresponding side face by the second inner clamping table.

According to the scheme, optical glue is added to the part of the first optical glass, which is tightly attached to the first attaching portion, and the part of the second optical glass, which is tightly attached to the second attaching portion, for sealing connection.

The first optical glass and the second optical glass are coaxially arranged, and the axial distance between the first optical glass and the second optical glass is 50 mm-100 mm; the transmittance of the first optical glass and the second optical glass is not less than 85%.

The second flange part is locked on the first attaching part through screws, and the third flange part is locked on the second attaching part through screws; the outer diameters of the second flange part and the third flange part are consistent and are both smaller than the outer diameter of the first flange part.

The utility model provides an optical window obtains following beneficial effect:

1) and various performance indexes of the optical window during use can meet experimental requirements.

2) The optical window adopts a detachable design mode, can be integrally and conveniently detached from the high-low temperature test box body, can be detached from the optical window or the standby optical window for alternate use, and does not influence the high-low temperature performance and the optical window performance.

3) The optical glass can be conveniently detached from the supporting body of the optical window, and the maintenance and renovation of the optical glass are facilitated.

4) The double-layer optical glass structure is characterized in that the interlayer at the interval between the two layers is filled with low dew point dry air, so that the dry air with the temperature lower than that of a dry ball is ensured between the first optical glass and the second optical glass, the surface of the outer optical glass can be prevented from frosting, and the optical window can be normally used in a low-temperature state.

Description of the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is an assembled and used schematic view of the embodiment of fig. 1.

The specific implementation mode is as follows:

the conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 and 2, which are schematic views of a preferred embodiment of the present invention, the present invention relates to an optical window, which includes a supporting body 1, a first optical glass 2, a second optical glass 4, a first fixing ring 3 and a second fixing ring 5.

The support body 1 is cylindrical, preferably made of metal, and has a first bonding portion 11 and a second bonding portion 12 formed at both ends of the support body 1, respectively, and a first flange portion 13 and a functional hole 14 formed in the outer periphery of the support body 1, wherein the functional hole 14 communicates with an inner cavity 15 of the support body 1, and the functional hole 14 is sealed by a needle valve. First flange portion 13 is used for connecting corresponding test equipment, reaches the mode that optical window adopted detachable design, can wholly conveniently demolish from high low temperature test box, can dismantle back alternate use with optical window or reserve optical window, and does not influence high low temperature performance and optical window performance. The first optical glass 2 is tightly attached to the first attaching portion 11 and fixed by the first fixing ring 3, so as to achieve sealing and packaging. This first solid fixed ring 3 is through detachable construction connection supporter 1, makes things convenient for first optical glass to remove from the supporter conveniently, and the optical glass of being convenient for maintains the maintenance and renovates. The second optical glass 4 is closely attached to the second attaching portion 12 and fixed by the second fixing ring 5, thereby achieving hermetic sealing. This solid fixed ring of second 5 is through detachable construction connection supporter 1, makes things convenient for second optical glass to remove from the supporter conveniently, and the optical glass of being convenient for maintains and renovates. The inner cavity 15 of the support body 1 is sealed by the first optical glass 2 and the second optical glass 4 to form a closed cavity, and the inner cavity 15 is filled with low dew point dry air in a vacuum environment, so that the humidity between the first optical glass and the second optical glass is zero, the frosting of a window can be avoided, and the usability is improved.

Referring to fig. 1 and 2, in the present embodiment, the supporting body 1 is a circular barrel, and the first attaching portion 11 and the second attaching portion 12 are outward flanged structures at corresponding ends of the supporting body 1, so that the structure is simple, and the manufacturing and the assembling are convenient. The first attaching portion 11 is attached to the first optical glass 2 and the first fixing ring 3 at the same time, and the second attaching portion 12 is attached to the second optical glass 4 and the second fixing ring 5 at the same time, so that connection tightness is improved. Further, the first fixing ring 3 is provided with a second flange portion 31 and a first outer protruding ring 32 protruding from the second flange portion 31, a first inner clamping platform 321 is provided on the inner side of the outer end of the first outer protruding ring 32, and the first optical glass 2 is embedded in the first outer protruding ring 32 and clamped on the corresponding side surface by the first inner clamping platform 321. The second fixing ring 5 is provided with a third flange part 51 and a second outer convex ring 52 protruding from the third flange part 51, a second inner clamping table 521 is arranged on the inner side of the outer end of the second outer convex ring 52, and the second optical glass 4 is embedded in the second outer convex ring 52 and clamped on the corresponding side by the second inner clamping table 521. The structure can conveniently and quickly assemble the first optical glass 2 and the second optical glass 4, and the positioning is stable and powerful, so that the installation usability is ensured. In this embodiment, the first optical glass 2 is flush with the inner side surface of the second flange portion 31 and flatly adheres to the first adhesion portion 11; the inner side surfaces of the second optical glass 4 and the third flange part 51 are flush and are flatly attached to the second attaching part 12, and the part of the first optical glass 2 attached to the first attaching part 11 and the part of the second optical glass 4 attached to the second attaching part 12 are both added with optical cement for sealing connection. In this embodiment, the second flange portion 31 is screwed to the first bonding portion 11, and the third flange portion 51 is screwed to the second bonding portion 12, so that the assembly and disassembly are convenient. The outer diameters of the second flange portion 31 and the third flange portion 51 are consistent and smaller than the outer diameter of the first flange portion 13, so that the optical window can be conveniently embedded in the window hole of the corresponding experimental device, and the dismounting and mounting work of the first flange portion 13 cannot be influenced. When the optical glass and the support body are packaged in the embodiment, the optical glass and the support body are assembled and sealed by adopting optical cement, and then are locked and fixed by screws; therefore, after packaging, complete sealing between the two pieces of optical glass and the support body is ensured, and a sandwich cavity between the two pieces of optical glass is permanently sealed in a high-temperature and low-temperature circulating working state and is airtight; the optical glass package can also resist the change of part of stress through the flexible optical cement, so that a good sealing effect is achieved.

Referring to fig. 1 and 2, in the embodiment, the first optical glass 2 and the second optical glass 4 are coaxially arranged, and an axial distance between the first optical glass 2 and the second optical glass 4 is 50mm to 100 mm; the transmittance of the first optical glass 2 and the transmittance of the second optical glass 4 are not less than 85%, so that various performance indexes of the optical window during use can meet experimental requirements.

The utility model discloses the optical window of preparation reaches technical indicator as follows:

1. optical window glass material (selected according to user actual test use condition): quartz glass; k9 glass; germanium; zinc sulfide and the like, and can ensure that various performance indexes of the optical window meet the experimental requirements when in use.

2. Effective clear aperture of common optical window: phi 100 mm; phi is 150 mm; phi is 200 mm; phi is 250 mm; phi is 300 mm; the variety is various, satisfies different equipment needs.

3. Optical window installation position: the temperature of the high-low temperature test chamber can be measured at the central point of the side surface of the chamber body or the central point of the top of the chamber body.

4. Spectral band: (visible light wave band: 0.5um-1.7 um);

(short wave: 3700-4800 nm +/-10 nm; long wave: 8000-14000 nm +/-10 nm; etc.).

5. Optical window glass transmittance: not less than 85%.

6. The optical-grade sealing package ensures the air tightness and the surface shape precision of the optical glass, and the surface shape precision of the optical glass is as follows: better than 1/20 λ (in =0.6328 um);

7. optical glass packaging mode: the metal support body is finely machined, optical cement is used for sealing, stress influence is small when temperature changes, and optical glass is convenient to install and dismantle.

As shown in fig. 2, when the present invention is used, the manufactured optical window is fixed at the top center point or the side center of the high-low temperature box 100, when the high-low temperature box 100 is operated at the extreme high and low temperatures, it is checked that the middle of the interlayer of the optical window glass does not frost or fog, and the surface of the optical window glass does not generate condensation; in order to prevent the outer surface of the metal support body of the optical window from generating low-temperature conduction and causing condensation on the outer surface of the metal support body due to the temperature difference between the inside and the outside of the high-low temperature box, a hot air curtain 200 with the temperature controlled and heated is designed and installed below the metal support body, when the temperature in the high-low temperature box is lower than the normal temperature, the hot air curtain 200 is automatically opened to operate, the temperature can be automatically set, the temperature on the outer surface of the metal support body is kept to be slightly higher than the normal temperature, and the condensation phenomenon on the outer surface of the metal support body is avoided. After the protection cover can be arranged, the protection cover can cover the shape structures of the first convex ring 32 and the second convex ring 52, and is used for protecting the optical window from being damaged due to the influence of external force; meanwhile, when the optical window is not used, the experimental equipment can be covered by the protective cover, so that the requirement that the equipment is used for independently performing high-low temperature cyclic tests is met, and the usability is improved.

Of course, the present invention has been described in detail with reference to the embodiments, and only for the purpose of illustrating the technical conception and the features of the present invention, the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and implement the same, therefore, all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An optical window, comprising:

the support body (1), the support body (1) is cylindrical, construct the first laminating department (11) and second laminating department (12) separately on both ends of the support body (1), and there are first flange department (13) and function hole (14) on the periphery of the support body (1), the cavity (15) of the support body (1) of the communication of the function hole (14);

the first optical glass (2), the first optical glass (2) is closely attached to the first attaching part (11) and fixed through a first fixing ring (3), and the first fixing ring (3) is connected with the support body (1) through a detachable structure;

a second optical glass (4), wherein the second optical glass (4) is tightly attached to the second attaching portion (12) and is fixed through a second fixing ring (5), and the second fixing ring (5) is connected with the support body (1) through a detachable structure;

an inner cavity (15) of the support body (1) is sealed by the first optical glass (2) and the second optical glass (4) to form a closed cavity, and low dew point dry air is injected into the inner cavity (15) in a vacuum environment.

2. An optical window according to claim 1, characterised in that the support (1) is a circular tub, the first (11) and second (12) abutment portions being turned-out structures at the respective ends of the support (1); the first attaching portion (11) is used for attaching and connecting the first optical glass (2) and the first fixing ring (3) at the same time, and the second attaching portion (12) is used for attaching and connecting the second optical glass (4) and the second fixing ring (5) at the same time.

3. An optical window according to claim 1 or 2, wherein the first fixing ring (3) is provided with a second flange portion (31) and a first outer convex ring (32) protruding from the second flange portion (31), the inner side of the outer end of the first outer convex ring (32) is provided with a first inner clamping table (321), and the first optical glass (2) is embedded in the first outer convex ring (32) and clamped at the corresponding side by the first inner clamping table (321); the second fixing ring (5) is provided with a third flange part (51) and a second outer convex ring (52) protruding from the third flange part (51), a second inner clamping table (521) is arranged on the inner side of the outer end of the second outer convex ring (52), and the second optical glass (4) is embedded in the second outer convex ring (52) and clamped on the corresponding side face by the second inner clamping table (521).

4. An optical window according to claim 1 or 2, characterized in that the optical cement sealing connection is added at the position where the first optical glass (2) is tightly attached to the first attaching portion (11) and at the position where the second optical glass (4) is tightly attached to the second attaching portion (12).

5. An optical window according to claim 1 or 2, characterised in that the first (2) and second (4) optical glasses are arranged coaxially and the axial distance between the first (2) and second (4) optical glasses is 50-100 mm; the transmittance of the first optical glass (2) and the second optical glass (4) is not less than 85%.

6. An optical window according to claim 3, wherein the second flange portion (31) is screwed to the first abutment portion (11) and the third flange portion (51) is screwed to the second abutment portion (12); the outer diameters of the second flange part (31) and the third flange part (51) are consistent and are smaller than the outer diameter of the first flange part (13).