High-precision transmission observation window capable of being used in wide-temperature environment

Abstract

The utility model relates to a high-precision transmission sighting window capable of being used in a wide-temperature environment. The high-precision transmission sighting window comprises a lens barrel, an optical lens, an optical lens mounting pressure plate and an outer flange connecting disc, two optical lenses are arranged in the lens barrel in parallel, a nitrogen hollow cavity is formed by the lens barrel and the two optical lenses arranged in parallel, the optical lens installation pressing plate is installed on the peripheries of the optical lenses in a pressing mode, the optical lenses are connected in the lens barrel in a pressing mode, and outer flange connecting discs are coaxially installed on the two sides of the lens barrel. According to the utility model, the optical lens, the nitrogen filled in the nitrogen hollow cavity and the heating tape structure are adopted, so that a stable and high-precision visual sighting window is provided for orientation equipment, and the orientation precision or attitude measurement precision of the orientation equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the application field of precise self-collimation measurement technology, in particular to a high-precision transmission sighting window that can be used in a wide temperature environment. Background Art

[0002] High-precision orientation equipment requires orientation accuracy or attitude measurement accuracy testing over the full temperature range to ensure accurate measurements under varying temperature conditions. This type of full-temperature testing requires the orientation equipment to be placed on an isolated foundation within a high- and low-temperature environmental test chamber. An autocollimation theodolite is set up outside the chamber. The autocollimation theodolite is aimed through the chamber window at the reference mirror on the orientation equipment being measured within the chamber, enabling precise monitoring of the equipment. By determining changes in the angular position or attitude of the reference mirror, the orientation accuracy or attitude measurement accuracy of the system over the full temperature range can be accurately measured.

[0003] The observation windows of commonly used high and low temperature environment test chambers generally use ordinary multi-layer insulating glass. Each layer of glass is made by float glass, which has low surface accuracy. Under different temperatures or when observing from different observation areas, the observation and measurement errors introduced by it are generally measured to be more than 40", which makes it difficult to meet the requirements of high-precision autocollimation measurement.

[0004] In response to the above technical problems, a high-precision transmission observation window that can be used in a wide temperature environment is provided. Summary of the Invention

[0005] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a high-precision transmission sighting window that can be used in a wide temperature environment. The utility model adopts optical lenses, nitrogen-filled nitrogen hollow cavities and a heating belt structure to provide a stable and high-precision visual sighting window for directional equipment, thereby ensuring the directional accuracy or attitude measurement accuracy of the directional equipment.

[0006] The utility model solves the technical problem by the following technical solutions:

[0007] A high-precision transmission sighting window that can be used in a wide temperature environment includes a lens barrel 3, an optical lens 4, an optical lens mounting plate 2, and an external flange connection disk 1; two optical lenses 4 are placed in parallel in the lens barrel 3, and the lens barrel 3 and the two parallel optical lenses 4 form a nitrogen hollow cavity 8. The optical lens mounting plate 2 is press-fitted onto the outer periphery of the optical lens 4, pressing the optical lens 4 into the lens barrel 3, and external flange connection disks 1 are coaxially mounted on both sides of the lens barrel 3.

[0008] Furthermore, a sealing ring 1 5 is provided between the inner side walls of the two optical lenses 4 and the lens barrel; and a sealing ring 2 is provided between the circumferential surfaces of the two optical lenses 4 and the lens barrel.

[0009] Furthermore, an annular heating belt installation groove is formed on the outer circumference of the lens barrel, and the heating belt 7 is embedded in the annular groove.

[0010] Furthermore, the optical lens 4 is circular in shape, and the lens body is made of optical quartz material.

[0011] Furthermore, the optical lens 4 has a thickness of 15 mm and a diameter of 168 mm.

[0012] Furthermore, the double-sided parallelism of the optical lens 4 is not greater than 2″.

[0013] The advantages and positive effects of the utility model are:

[0014] The utility model discloses a high-precision transmission sighting window that can be used in a wide temperature environment. It adopts an optical lens, a nitrogen cavity filled with nitrogen, and a heating belt structure. When used in a wide temperature range, it can provide a stable and high-precision sighting window for directional equipment. While ensuring the sighting clarity, the sighting measurement accuracy is better than 5", thereby ensuring the accuracy of the directional equipment. It ensures that the high-precision directional equipment can be accurately measured under different temperature conditions during the directional accuracy or attitude measurement accuracy test within the full temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the high-precision transmission sighting window of the utility model that can be used in a wide temperature environment;

[0016] Figure 2 This is a left-view structural diagram of the high-precision transmission sighting window of the utility model that can be used in a wide temperature environment;

[0017] In the picture:

[0018] 1-External flange connecting disc, 2-Optical mirror mounting plate, 3-Lens barrel, 4-Optical lens, 5-Sealing ring 1, 6-Sealing ring 2, 7-Heating belt, 8-Nitrogen hollow cavity, 9-Connecting screw 1, 10-Connecting screw 2. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely illustrative and non-restrictive, and should not be used to limit the scope of protection of the present invention.

[0020] like Figure 1 、 Figure 2As shown, a high-precision transmission observation window that can be used in a wide temperature environment includes a lens barrel 3, an optical lens 4, an optical lens mounting plate 2 and an external flange connection disk 1; two optical lenses 4 are placed in parallel in the lens barrel 3, and the lens barrel 3 and the two parallel optical lenses 4 form a nitrogen hollow cavity 8, the air in the nitrogen hollow cavity 8 is exhausted and filled with nitrogen, the optical lens mounting plate 2 is pressed onto the outer periphery of the optical lens 4, and the optical lens 4 is pressed into the lens barrel 3, and the external flange connection disk 1 is coaxially mounted on both sides of the lens barrel 3.

[0021] The outer flange connecting disc 1 is connected to the lens barrel 3 via connecting screws 1 (9). The outer flange connecting disc 1 is connected to the optical lens mounting plate 2 via connecting screws 2 (10). Both connecting screws 1 (9) and 2 (10) are M3 screws. Multiple screw positions ensure a more uniform and stable installation force. Two optical lenses 4 are mounted in parallel, and the cavity between them is nitrogen-filled to prevent frost from forming during alternating high and low temperature cycles.

[0022] A sealing ring 1 5 is provided between the inner sidewalls of the two optical lenses 4 and the lens barrel; a sealing ring 2 6 is provided between the circumference of the two optical lenses 4 and the lens barrel 3. To ensure a tight seal between the nitrogen cavity 8, two sealing rings 1 5 and 2 6 are provided in different locations and with different diameters.

[0023] The outer periphery of the lens barrel 3 is formed with an annular heating belt installation groove, in which the heating belt 7 is embedded. Electric heating can be performed in a low temperature environment to enhance the heat preservation of the high and low temperature environment test box.

[0024] Optical lens 4 is circular in shape, made of high-quality optical quartz and double-sided polished. It is 15mm thick and 168mm in diameter, ensuring both strength and a wide viewing range. The parallelism of both sides of optical lens 4 is no greater than 2″.

[0025] The utility model discloses a high-precision transmission sighting window that can be used in a wide temperature environment. It adopts an optical lens, a nitrogen cavity filled with nitrogen, and a heating belt structure. When used in a wide temperature range, it can provide a stable and high-precision sighting window for directional equipment. While ensuring the sighting clarity, the sighting measurement accuracy is better than 5", thereby ensuring the accuracy of the directional equipment. It ensures that the high-precision directional equipment can be accurately measured under different temperature conditions during the directional accuracy or attitude measurement accuracy test within the full temperature range.

[0026] The working principle of this utility model:

[0027] The optical lens 4 is installed in the lens barrel 3 so that the two optical lenses are placed parallel to each other in the lens barrel 3 to form a hollow cavity. The air in this hollow cavity is purged and filled with nitrogen to form a nitrogen hollow cavity 8. In order to ensure that the nitrogen hollow cavity 8 can be strictly sealed, two sealing rings 5 ​​and 6 with different diameters and sizes at different positions are provided in the structure. The optical lens mounting plate 2 is then pressed onto the outer periphery of the optical lens 4. The outer flange connecting disc 1 is connected to the lens barrel 3 by connecting screws 9, and the outer flange connecting disc 1 is connected to the optical lens mounting plate 2 by connecting screws 10. The outer flange connecting disc 1 allows the high-precision transmission sighting window to be installed on the high and low temperature test chamber. The heating belt 7 embedded in the annular heating belt mounting groove on the outer periphery of the lens barrel 3 can be electrically heated in a low temperature environment to enhance the thermal insulation of the high and low temperature environment test chamber.

[0028] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will understand that various replacements, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A high-precision transmission sighting window that can be used in a wide temperature environment, characterized by: The invention comprises a lens barrel (3), an optical lens (4), an optical lens mounting pressure plate (2), and an outer flange connection disk (1); two optical lenses (4) are placed in parallel in the lens barrel (3); the lens barrel (3) and the two parallel optical lenses (4) form a nitrogen hollow cavity (8); the optical lens mounting pressure plate (2) is pressed onto the outer periphery of the optical lens (4) to press the optical lens (4) into the lens barrel (3); and outer flange connection disks (1) are coaxially mounted on both sides of the lens barrel (3).

2. The high-precision transmission sighting window that can be used in a wide temperature environment according to claim 1, characterized in that: A first sealing ring (5) is provided between the inner side walls of the two optical lenses (4) and the lens barrel; and a second sealing ring (6) is provided between the circumferential surfaces of the two optical lenses (4) and the lens barrel.

3. The high-precision transmission sighting window that can be used in a wide temperature environment according to claim 1, characterized in that: An annular heating belt installation groove is formed on the outer circumference of the lens barrel, and a heating belt (7) is embedded in the annular heating belt installation groove.

4. The high-precision transmission sighting window that can be used in a wide temperature environment according to claim 1, characterized in that: The optical lens (4) is circular in shape, and the lens body is made of optical quartz material.

5. The high-precision transmission sighting window that can be used in a wide temperature environment according to claim 1, characterized in that: The optical lens (4) has a thickness of 15 mm and a diameter of 168 mm.

6. The high-precision transmission sighting window that can be used in a wide temperature environment according to claim 1, characterized in that: The double-sided parallelism of the optical lens (4) is not greater than 2″.

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