CN117741903B - Device and method for detecting assembly interval surface of reflector main mirror - Google Patents
Device and method for detecting assembly interval surface of reflector main mirror Download PDFInfo
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- CN117741903B CN117741903B CN202410184866.6A CN202410184866A CN117741903B CN 117741903 B CN117741903 B CN 117741903B CN 202410184866 A CN202410184866 A CN 202410184866A CN 117741903 B CN117741903 B CN 117741903B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000006073 displacement reaction Methods 0.000 claims abstract description 44
- 238000009434 installation Methods 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000003384 imaging method Methods 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims description 14
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention relates to the field of installation and adjustment of a main mirror of a reflecting mirror, in particular to a detection device for an assembly interval surface of the main mirror of the reflecting mirror and a method for installing and adjusting the main mirror of the reflecting mirror, wherein the detection device comprises the following components: the main lens barrel tool is used for installing and fixing a main lens barrel; the main mirror flexible joint tool is used for installing and fixing a main mirror flexible joint, and a reflecting mirror main mirror is installed on the main mirror flexible joint; the displacement sensor is arranged and fixed on the main lens flexible joint tool and is used for measuring the distance between the main lens cone and the assembling spacing surface of the main lens flexible joint; the main mirror flexible joint tool is installed and fixed on the adjusting mechanism through the adjusting platform, and the adjusting mechanism is used for adjusting the optimal imaging position of the main mirror of the reflecting mirror. The invention does not need to be dismantled and installed for multiple times, simplifies the assembly and adjustment steps, saves the assembly and adjustment time and improves the assembly and adjustment efficiency.
Description
Technical Field
The invention relates to the technical field of installation and adjustment of a main mirror of a reflecting mirror, in particular to a detecting device for an assembly spacing surface of the main mirror of the reflecting mirror and an installation and adjustment method of the main mirror of the reflecting mirror.
Background
The main mirror of the reflecting mirror is used as a core component of the remote sensing load system, and the installation, assembly and positioning precision of the main mirror directly influence the surface shape, so that the imaging quality of the remote sensing load is influenced. Therefore, consistency of positions of the reflector main mirror during installation must be ensured, and internal stress is avoided.
In the installation process of the reflector main mirror, in order to ensure that the reflector main mirror meets the expected working requirement, the reflector main mirror needs to be adjusted so as to ensure that the imaging effect of the reflector main mirror is optimal. Because the optimal installation position of the main mirror of the reflecting mirror is inclined and a plurality of groups of screws are adopted for installation, the distance between the main mirror flexible joint and the main lens barrel corresponding to each installation position is determined in the installation and adjustment process.
The existing adjusting method is to continuously adjust the mounting positions of the gaskets with different thicknesses to enable the main mirror of the reflecting mirror to be located at the optimal imaging position, then process proper main mirror adjusting pads according to the thickness of the gaskets used at the mounting positions, and install the main mirror adjusting pads between the main mirror flexible joint and the main mirror cylinder to complete the adjusting of the main mirror of the reflecting mirror. The current adjusting method has complicated steps, needs to be dismantled and installed for many times, and detects the imaging quality of the main mirror of the reflecting mirror after each installation, and has long time consumption and low efficiency.
Disclosure of Invention
In view of the above problems, the invention provides a device and a method for detecting and adjusting an assembly spacing surface of a main mirror of a reflecting mirror, which are characterized in that when the main mirror of the reflecting mirror is in an optimal imaging position, a displacement sensor is used for measuring the distance between the assembly spacing surface of a flexible joint of the main mirror and a main mirror cylinder, and a main mirror adjusting pad with proper thickness and a dihedral angle structure is processed according to the distance between each installation position, so that the installation is not required to be dismantled for multiple times, the time consumption is short, and the efficiency is high.
The invention provides a detection device for a main mirror assembly spacing surface of a reflecting mirror, which comprises the following components: the main lens barrel tool is used for installing and fixing a main lens barrel; the main mirror flexible joint tool is used for installing and fixing a main mirror flexible joint, and a reflecting mirror main mirror is installed on the main mirror flexible joint; the displacement sensor is arranged and fixed on the main lens flexible joint tool and is used for measuring the distance between the main lens cone and the assembling spacing surface of the main lens flexible joint; the main mirror flexible joint tool is installed and fixed on the adjusting mechanism through the adjusting platform, and the adjusting mechanism is used for adjusting the optimal imaging position of the main mirror of the reflecting mirror.
Preferably, the main lens flexible joint tool comprises a hollow cylindrical body, a connecting lug is formed on the side wall of the hollow cylindrical body, a mounting hole penetrating through the thickness is formed in the connecting lug along the axial direction, a threaded hole is formed in the connecting lug along the radial direction, and a shell of the displacement sensor is inserted into the mounting hole and fastened laterally through a screw; the main lens flexible joint is provided with an ear piece, the ear piece is provided with a through hole, and the detection end of the displacement sensor passes through the through hole and touches the mounting surface on the main lens cone.
Preferably, the number of the displacement sensors, the lugs and the connecting lugs is the same, and is at least three.
Preferably, a connecting plate is further formed on the side wall of the hollow cylindrical body, and the connecting plate is fixed on the adjusting platform.
Preferably, the detection device for the assembly interval surface of the main mirror of the reflecting mirror further comprises an optical platform, and the main mirror cylinder tool and the adjusting mechanism are fixed on the optical platform.
Preferably, the main lens barrel tool is of an L-shaped structure, the main lens barrel tool is horizontally installed and fixed on the main lens barrel tool, the main lens flexible joint tool is horizontally fixed on the upper surface of the adjusting platform through the connecting plate, and the output end of the adjusting mechanism is fixedly connected with the lower surface of the adjusting platform.
The method for adjusting the main mirror of the reflecting mirror provided by the invention is realized by the detection device, and comprises the following steps:
S1: the method comprises the steps of installing and fixing a main mirror cylinder on an optical platform through a main mirror cylinder tool, installing a reflecting mirror main mirror on a main mirror flexible joint, installing and fixing a main mirror flexible joint on a main mirror flexible joint tool, installing the main mirror flexible joint tool on an adjusting mechanism through an adjusting platform, and installing the adjusting mechanism on the optical platform;
S2: the position of the main mirror of the reflecting mirror is adjusted through the adjusting mechanism until the main mirror of the reflecting mirror is at the optimal imaging position;
S3: three displacement sensors are installed and fixed on a main lens flexible joint tool, detection ends of the three displacement sensors respectively penetrate through the main lens flexible joint downwards to be contacted with a mounting surface of a main lens barrel, and the numerical values of the three displacement sensors are recorded as a set A;
s4: moving the detection ends of the three displacement sensors, enabling the detection ends of the three displacement sensors to be level with the installation surface of the main mirror flexible joint by utilizing the precision gauge block, and recording the numerical values of the three displacement sensors as a set B;
S5: and manufacturing a main mirror adjusting pad with corresponding thickness and forming a dihedral angle structure according to the set A and the set B, and installing the main mirror adjusting pad at an installation position between the main mirror flexible joint and the main mirror barrel to finish the precise installation of the main mirror of the reflecting mirror.
Compared with the prior art, when the main mirror of the reflector is determined to be at the optimal imaging position, the distance between the flexible joint of the main mirror and the main mirror cylinder is measured through the displacement sensor, and the main mirror adjusting pad with proper thickness is processed according to the distance between the installation positions, so that the dismounting and installation for multiple times are not needed, the assembling and adjusting steps are simplified, the assembling and adjusting time is saved, and the assembling and adjusting efficiency is improved.
Drawings
FIG. 1 is a schematic diagram showing the effect of the mirror assembly according to the embodiment of the invention after the adjustment;
FIG. 2 is a schematic structural view of a detecting device for a mirror main mirror assembly spacer surface according to an embodiment of the present invention;
FIG. 3 is a schematic view of the partial cross-sectional structure of FIG. 2;
fig. 4 is a partially exploded view of fig. 2.
The reference numerals include: the main lens barrel tool 1, the main lens flexible joint tool 2, the hollow cylindrical body 21, the connecting lug 22, the threaded hole 23, the connecting plate 24, the displacement sensor 3, the adjusting mechanism 4, the adjusting platform 5, the optical platform 6, the main lens barrel 7, the reflecting mirror main lens 8, the main lens flexible joint 9, the lug 91, the through hole 92 and the main lens adjusting pad 10.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, like modules are denoted by like reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, a detailed description thereof will not be repeated.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limiting the invention.
As shown in fig. 1, in order to finally complete the mirror main assembly of the adjustment, the mirror main assembly includes a main lens barrel 7, a mirror main lens 8 and a main lens flexible joint 9, in the installation process of the mirror main lens 8, in order to avoid the reduction of the surface shape precision of the mirror main lens 8 caused by the internal stress generated by the mirror main lens 8, the mirror main lens 7 is installed on the main lens flexible joint 9, so as to form a main lens assembly, and then the main lens flexible joint 9 is installed on the main lens barrel 7 through a main lens adjusting pad 10, and the installation positions between the main lens flexible joint 9 and the main lens barrel 7 are at least three, and the three installation positions are described below as examples.
Since the optimal imaging position of the mirror main mirror 8 is not parallel to the mounting surface of the main mirror barrel 7, a main mirror adjusting pad 10 with an annular structure is added at three mounting positions between the main mirror flexible joint 9 and the main mirror barrel 7, and the thickness of the main mirror adjusting pad 10 is the distance between the mounting surface of the main mirror flexible joint 9 and the mounting surface of the main mirror barrel 7 corresponding to the three mounting positions, and the mounting surface of the main mirror flexible joint 9 and the mounting surface of the main mirror barrel 7 are called as assembly interval surfaces. The invention is innovative in that the three-position displacement sensor is used for measuring the distance between the three assembly spacing surfaces simultaneously, as the three-position is known, the main mirror adjusting pad 10 with a dihedral angle structure which accords with the measurement result can be established in the three-dimensional model according to the three-position, then the main mirror adjusting pad 10 which accords with the measurement result is manufactured on a high-precision machining center, the optimal imaging position of the main mirror 8 of the reflecting mirror is not required to be determined by installing gaskets with different thicknesses, the installation is not required to be dismantled for a plurality of times, the installation and adjustment steps are simplified, a complex precise three-coordinate machine is not required, the device can be implemented in a smaller installation space, the installation and adjustment time is saved, and the installation and adjustment efficiency is improved.
The dihedral angle means that the two fitting surfaces of the main mirror adjustment pad 10 are respectively in contact with the main mirror cylinder 7 and the main mirror flexible joint 9, that is, the thicknesses of the main mirror adjustment pad 10 corresponding to the three fitting positions are different.
The distance between the assembly spacing surfaces of the main mirror flexible joint 9 and the main mirror cylinder 7 is measured by a detection device. As shown in fig. 2-4, the detection device for the main mirror assembly spacing surface of the reflecting mirror provided by the embodiment of the invention comprises a main lens barrel tool 1, a main mirror flexible joint tool 2, three displacement sensors 3, an adjusting mechanism 4, an adjusting platform 5 and an optical platform 6, wherein the main lens barrel tool 1 is of an L-shaped structure, the main lens barrel 7 is horizontally and fixedly arranged on a vertical part of the main lens barrel tool 1, a horizontal part of the bottom of the main lens barrel tool 1 is fixedly arranged on the optical platform 6, the adjusting mechanism 4 is also fixedly arranged on the optical platform 6, the main mirror flexible joint tool 2 is fixedly arranged at the output end of the adjusting mechanism 4 through the adjusting platform 5, the reflecting mirror main mirror 8 is arranged on a main mirror flexible joint 9, the main mirror flexible joint 9 is fixedly arranged on the main mirror flexible joint tool 2, and the displacement sensor 3 is also fixedly arranged on the main mirror flexible joint tool 2.
The main mirror flexible joint tool 2 comprises a hollow cylindrical body 21, three connecting lugs 22 which are distributed at 120 degrees are formed on the side wall of the hollow cylindrical body 21, mounting holes which penetrate through the thickness are formed in the three connecting lugs 22 in the axial direction, threaded holes 23 are formed in the radial direction, the outer shells of the three displacement sensors 3 are inserted into the three mounting holes, and the displacement sensors 3 are locked in the mounting holes by screwing screws into the threaded holes 23; three lugs 91 distributed at 120 degrees are formed on the main lens flexible joint 9, through holes 92 are formed in the lugs 91, and the detection end of the displacement sensor 3 passes through the through holes 92 and contacts with the mounting surface on the main lens barrel 7.
A connecting plate 24 is further formed on the side wall of the hollow cylindrical body 21, and the connecting plate 24 is integrally fixed on the adjusting platform 5, so that the main mirror flexible joint tool 2 is horizontally fixed on the adjusting platform 5.
The positions of the mirror main mirror 8 and the main mirror flexible joint 9 relative to the main barrel 7 are adjusted by the adjusting mechanism 4 until the mirror main mirror 8 is at the optimal imaging position.
The above-mentioned details are about the structure of the detecting device for the main mirror assembly spacer surface of the reflecting mirror according to the embodiment of the invention. The invention also provides a method for adjusting the main mirror of the reflecting mirror by using the detection device, which comprises the following steps:
S1: the main mirror cylinder is installed and fixed on the optical platform through a main mirror cylinder tool, the reflecting mirror main mirror is installed on the main mirror flexible joint, the main mirror flexible joint is installed and fixed on the main mirror flexible joint tool, the main mirror flexible joint tool is installed on the adjusting mechanism through the adjusting platform, and the adjusting mechanism is installed on the optical platform.
S2: and adjusting the position of the main mirror of the reflecting mirror through the adjusting mechanism until the main mirror of the reflecting mirror is at the optimal imaging position.
S3: and (3) installing and fixing the three displacement sensors on a main mirror flexible joint tool, enabling detection ends of the three displacement sensors to respectively penetrate through the main mirror flexible joint downwards to be in contact with the installation surface of the main mirror barrel, and recording the numerical values of the three displacement sensors as a set A.
S4: and (3) moving the detection ends of the three displacement sensors, enabling the detection ends of the three displacement sensors to be level with the installation surface of the main mirror flexible joint by utilizing the precision gauge block, and recording the numerical values of the three displacement sensors as a set B.
And (3) establishing an interval model of the main mirror flexible joint and the main mirror barrel in three-dimensional modeling software according to the two measurement results, so as to design the thickness of three installation positions of the main mirror adjusting pad.
S5: and manufacturing a main mirror adjusting pad with corresponding thickness and forming a dihedral angle structure according to the set A and the set B, and installing the main mirror adjusting pad at an installation position between the main mirror flexible joint and the main mirror barrel to finish the precise installation of the main mirror of the reflecting mirror.
Because the reflector main mirror is arranged on the main mirror flexible joint, the position of the reflector main mirror can be changed by adjusting the main mirror flexible joint, and then the imaging quality of the reflector main mirror is changed, and in the process of continuously changing the position of the reflector main mirror, three displacement sensors display the distances of three assembly spacing surfaces between the main mirror flexible joint and the main mirror cylinder. When the main mirror of the reflecting mirror is at the optimal imaging position, the readings of the three displacement sensors are recorded, three main mirror adjusting pads with dihedral angle structures with corresponding thickness are processed according to the numerical value, and the main mirror adjusting pads are arranged between the main mirror flexible joint and the installation position of the main lens barrel, so that the adjustment work of the main mirror of the reflecting mirror is completed.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present disclosure may be performed in parallel, sequentially, or in a different order, provided that the desired results of the technical solutions of the present disclosure are achieved, and are not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (6)
1. A device for detecting a mirror main mirror assembly spacer surface, comprising:
The main lens barrel tool is used for installing and fixing a main lens barrel;
The main mirror flexible joint tool is used for installing and fixing a main mirror flexible joint, and a reflecting mirror main mirror is installed on the main mirror flexible joint;
At least three displacement sensors respectively installed and fixed on the main mirror flexible joint tool and used for measuring the distance between the main mirror cylinder and the main mirror flexible joint on every assembly spacing surface when the main mirror of the reflecting mirror is at the optimal imaging position; the detection ends of the displacement sensors respectively penetrate through the main lens flexible joint to be in contact with the mounting surface of the main lens barrel, and the numerical value of the displacement sensors is recorded as a set A; moving the detection end of the displacement sensor to enable the detection end of the displacement sensor to be flush with the mounting surface of the main mirror flexible joint, recording the numerical value of the displacement sensor as a set B, calculating according to the set A and the set B to obtain the distance between the main mirror barrel and the main mirror flexible joint at all assembling interval surfaces, manufacturing a main mirror adjusting pad with corresponding thickness and forming a dihedral angle structure, and mounting the main mirror adjusting pad at the mounting position between the main mirror flexible joint and the main mirror barrel, wherein the thickness of the main mirror adjusting pad is the distance between the mounting surface of the main mirror flexible joint corresponding to the mounting position and the mounting surface of the main mirror barrel;
The main mirror flexible joint tool is installed and fixed on the adjusting mechanism through an adjusting platform, and the adjusting mechanism is used for adjusting the optimal imaging position of the main mirror of the reflecting mirror.
2. The device for detecting the assembly interval surface of the main mirror of the reflecting mirror according to claim 1, wherein the main mirror flexible joint fixture comprises a hollow cylindrical body, connecting lugs which are the same as the displacement sensors in number are formed on the side wall of the hollow cylindrical body, mounting holes penetrating through the thickness are formed in the connecting lugs along the axial direction, threaded holes are formed in the connecting lugs along the radial direction, and a shell of the displacement sensor is inserted into the mounting holes and fastened by screws in the lateral direction; the main lens flexible joint is provided with lugs which are the same as the displacement sensors in number, through holes are formed in the lugs, and detection ends of the displacement sensors penetrate through the through holes and touch with mounting surfaces on the main lens barrel.
3. The apparatus according to claim 2, wherein a connection plate is further formed on a side wall of the hollow cylindrical body, and the connection plate is fixed to the adjustment platform.
4. The apparatus for inspecting a mirror assembly spacer of claim 3, further comprising an optical platform, wherein the main barrel tooling and the adjustment mechanism are fixed to the optical platform.
5. The device for detecting the assembly interval surface of the main mirror of the reflecting mirror according to claim 4, wherein the main mirror cylinder tool is of an L-shaped structure, the main mirror cylinder tool is horizontally installed and fixed on the main mirror cylinder tool, the main mirror flexible tool is horizontally fixed on the upper surface of the adjusting platform through the connecting plate, and the output end of the adjusting mechanism is fixedly connected with the lower surface of the adjusting platform.
6. A method for adjusting a mirror main mirror, realized by the detection device for the mirror main mirror assembly spacer surface according to claim 5, comprising the steps of:
S1: the main mirror cylinder is installed and fixed on the optical platform through the main mirror cylinder tool, the reflector main mirror is installed on the main mirror flexible joint, the main mirror flexible joint is installed and fixed on the main mirror flexible joint tool, the main mirror flexible joint tool is installed on the adjusting mechanism through the adjusting platform, and the adjusting mechanism is installed on the optical platform;
S2: the position of the reflector main mirror is adjusted through the adjusting mechanism until the reflector main mirror is at an optimal imaging position;
S3: three displacement sensors are installed and fixed on the main lens flexible joint tool, detection ends of the three displacement sensors respectively penetrate through the main lens flexible joint downwards to be in contact with the installation surface of the main lens barrel, and the numerical values of the three displacement sensors are recorded as a set A;
S4: moving the detection ends of the three displacement sensors, enabling the detection ends of the three displacement sensors to be level with the installation surface of the main mirror flexible joint by utilizing the precision gauge block, and recording the numerical values of the three displacement sensors as a set B;
S5: and manufacturing a main mirror adjusting pad with corresponding thickness and forming a dihedral angle structure according to the set A and the set B, and installing the main mirror adjusting pad at an installation position between the main mirror flexible joint and the main mirror cylinder to finish the precise installation of the main mirror of the reflecting mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410184866.6A CN117741903B (en) | 2024-02-19 | 2024-02-19 | Device and method for detecting assembly interval surface of reflector main mirror |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410184866.6A CN117741903B (en) | 2024-02-19 | 2024-02-19 | Device and method for detecting assembly interval surface of reflector main mirror |
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| CN117741903A CN117741903A (en) | 2024-03-22 |
| CN117741903B true CN117741903B (en) | 2024-06-21 |
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| CN103576283A (en) * | 2013-12-04 | 2014-02-12 | 中国工程物理研究院总体工程研究所 | Rapid reflective mirror system based on flexible supports |
| CN107957626A (en) * | 2017-12-07 | 2018-04-24 | 北京理工大学 | A kind of six-freedom parallel automatic deflection adjusting system and method towards optical mirror slip |
| CN109270652A (en) * | 2018-11-28 | 2019-01-25 | 信利光电股份有限公司 | A kind of optical lens glasses lens assembling system |
| CN113031296A (en) * | 2021-03-24 | 2021-06-25 | 长春长光智欧科技有限公司 | Method for assembling and adjusting metal-based free-form surface three-reflection optical system capable of being assembled and adjusted quickly |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09113793A (en) * | 1995-10-17 | 1997-05-02 | Mitsubishi Electric Corp | Multiple reflection optical device and tilting mechanism for reflecting mirror |
| CN113917669B (en) * | 2021-09-08 | 2022-12-09 | 中国科学院西安光学精密机械研究所 | Off-axis reflection type telescopic system and installation and adjustment detection device and method thereof |
| KR102405094B1 (en) * | 2021-12-15 | 2022-06-07 | 한화시스템(주) | Assembling device for barrel and main mirror of optical equipment |
| CN114153047A (en) * | 2021-12-27 | 2022-03-08 | 桂林航天工业学院 | Light-weight two-shaft flexible support quick reflector |
| KR102577850B1 (en) * | 2023-02-21 | 2023-09-13 | 국방과학연구소 | Monolithic Flexure Hinge Mount for Optical section |
-
2024
- 2024-02-19 CN CN202410184866.6A patent/CN117741903B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576283A (en) * | 2013-12-04 | 2014-02-12 | 中国工程物理研究院总体工程研究所 | Rapid reflective mirror system based on flexible supports |
| CN107957626A (en) * | 2017-12-07 | 2018-04-24 | 北京理工大学 | A kind of six-freedom parallel automatic deflection adjusting system and method towards optical mirror slip |
| CN109270652A (en) * | 2018-11-28 | 2019-01-25 | 信利光电股份有限公司 | A kind of optical lens glasses lens assembling system |
| CN113031296A (en) * | 2021-03-24 | 2021-06-25 | 长春长光智欧科技有限公司 | Method for assembling and adjusting metal-based free-form surface three-reflection optical system capable of being assembled and adjusted quickly |
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