CN112880594B - Image alignment calibration and inspection method applied to low-light-level image intensifier - Google Patents
Image alignment calibration and inspection method applied to low-light-level image intensifier Download PDFInfo
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- CN112880594B CN112880594B CN202110046991.7A CN202110046991A CN112880594B CN 112880594 B CN112880594 B CN 112880594B CN 202110046991 A CN202110046991 A CN 202110046991A CN 112880594 B CN112880594 B CN 112880594B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B11/272—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes using photoelectric detection means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/42—Measurement or testing during manufacture
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Abstract
The invention discloses an image alignment calibration and inspection method applied to a low-light-level image intensifier, which can effectively control the cathode input center and the shell center of the assembled low-light-level image intensifier and effectively inspect the encapsulated low-light-level image intensifier by using an image alignment calibration system, and comprises the following steps: assembling a filling and sealing mould or an inspection mould, opening an image alignment, adjustment and inspection device, adjusting a gas cylinder pressure adjusting valve and a pressure gauge, introducing gas into the filling and sealing mould or the inspection mould, placing the filling and sealing mould or the inspection mould above a lower contact ring, closing a valve to enable an upper contact ring to fall to the top end of the filling and sealing mould or the inspection mould, adjusting a focusing adjusting button and a lifting knob, focusing a light spot generated by a camera on a cross line of the filling and sealing mould or the inspection mould, coinciding the center of the cross line with the light spot, observing the center of the cross line and the light spot offset condition, adjusting a knurled screw to align and then filling and sealing if the conditions are exceeded. The invention improves the yield and the working efficiency of the image intensifier.
Description
Technical Field
The invention relates to the technical field of assembly and inspection of low-light-level image intensifiers, in particular to an image alignment adjustment and inspection method applied to a low-light-level image intensifier, which is mainly used for adjusting the coaxiality of a cathode input center and a shell center of an inverted-image low-light-level image intensifier to be encapsulated and inspecting an image alignment value of the encapsulated low-light-level image intensifier.
Background
The low-light level night vision device is used as an important combat tool for performing far and near distance observation, tracking and identification by using the high-light level night vision device with the eyes with ultra-vision at night, is used by military and military troops such as land, sea, air and the like, and is widely applied to the fields of national security, industry, medicine, health and the like, the low-light level image intensifier is a core device of the low-light level night vision device, and the performance parameters of the low-light level image intensifier directly determine tactical indexes of the night vision device. Under low illumination at night, the inverted low-light-level image intensifier converts an optical image which cannot be directly seen by human eyes into an electronic image through a photoelectric cathode, the electronic image is intensified and amplified through a microchannel plate, then is accelerated through anode high voltage, bombards a fluorescent screen and is converted into an optical image with enough brightness, and finally the optical image is output through an anode optical fiber panel of the inverter to obtain an inverted image which can be directly observed by human eyes.
The glimmer image intensifier to be encapsulated has relative displacement with the shell due to the influence of comprehensive factors such as sealing errors of all component parts, errors of the optical fiber image inverter in the twisting process, shrinkage stress generated by silicon rubber in the curing process and the like, an image transmission path deviates from the center of a mechanical shaft, the qualification rate of the image intensifier is influenced, and meanwhile, the encapsulated glimmer image intensifier is difficult to detect the coaxiality.
Therefore, the invention designs an image alignment adjustment and inspection method and device of the inverted image type low-light-level image intensifier, and the principle of the method is to control the image alignment value of the image intensifier by utilizing the characteristic that the position of an output image of the inverted image type low-light-level image intensifier reversely changes along with the position change of an input image.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the coaxiality of the cathode input center and the shell center of the micro-light image intensifier to be encapsulated and encapsulated cannot be controlled and detected.
The invention aims to provide an image alignment, adjustment and inspection method applied to a low-light-level image intensifier, which uses an image alignment and adjustment system to effectively control the cathode input center and the shell center of the assembled low-light-level image intensifier and effectively inspect the encapsulated low-light-level image intensifier at the same time, and specifically comprises the following steps:
a) assembling a potting mold or an inspection mold, comprising:
(1) the assembly of the low-light image intensifier in the encapsulating mould comprises: adhering the cementing ring to the cathode surface of the low-light-level image intensifier by using a double faced adhesive tape, screwing a first knurled screw and a positioning screw on the shell, putting the low-light-level image intensifier into the shell, sequentially placing an upper compression ring and a compression ring at the anode end of the low-light-level image intensifier, screwing a second knurled screw, then placing an upper clamp and a ring, placing an upper conical ring, screwing a third knurled screw, turning the bottom of the shell, sequentially placing a central ring, a lower conical ring and a lower clamp on the cathode surface of the low-light-level image intensifier, and screwing a fourth knurled screw;
or
(2) The assembly of the low-light image intensifier in the inspection mold comprises: a low-light-level image intensifier is arranged in the lower circular ring, and then the upper circular ring is placed above the lower circular ring;
b) open image alignment calibration and verification device comprising:
and opening a computer, a gas controller and a valve of the image alignment calibration and inspection system, and electrifying the gas controller and the CCD camera.
c) And adjusting the pressure adjusting valve of the gas cylinder and the pressure gauge to enable the pressure gauge to display the pressure value.
d) And introducing the gas in the gas cylinder into a filling and sealing mould or an inspection mould.
e) And placing the encapsulating mold or the inspection mold above the lower contact ring.
f) The valve is closed to cut off the compressed gas in the pneumatic shaft, and the upper contact ring automatically falls to the top end of the filling and sealing mold or the inspection mold.
g) Adjusting a focusing adjusting button and a lifting knob, focusing light spots generated by a CCD camera on a cross line of the encapsulation mold or the inspection mold, and enabling the cross line to be clearly visible on a display screen of a computer;
h) the center of the reticle is coincident with the spot.
i) And rotating the encapsulating mold or the inspection mold, and observing whether the linear distance between the center of the cross line and the offset of the light spot is within 0.3 mm.
j) If the offset linear distance of the low-light-level image intensifier in the encapsulating mold exceeds 0.3mm, respectively adjusting a first knurled screw, a second knurled screw and a third knurled screw to enable the offset linear distance of the encapsulating mold to be within a specified value, and then encapsulating; and if the offset linear distance of the image intensifier in the inspection mould exceeds 0.3mm, repairing the low-light-level image intensifier.
k) And opening the valve to automatically lift the upper contact ring, taking down the filling and sealing mold or the inspection mold, and completing the image alignment value adjustment or the image alignment value inspection of the low-light-level image intensifier.
Preferably, the micro-optical image intensifier to be encapsulated is assembled in the encapsulating mold, and the encapsulated micro-optical image intensifier is assembled in the inspection mold.
Preferably, the encapsulation clamp in the invention comprises a lower clamp, a shell, an upper clamp, a center ring, a cementing ring, a positioning screw, an upper pressing ring, a pressing ring, a knurled screw, a connecting ring, an upper conical ring, a lower conical ring and a non-encapsulated micro-optical image intensifier.
Preferably, the inspection mold in the invention consists of an upper ring, a lower ring and a potted micro-optical image intensifier.
Preferably, the special gas contained in the gas cylinder 14 in the present invention is SF6A gas.
Preferably, the value of the gas cylinder pressure gauge in the invention should be kept between 0.1 and 0.3 MPa.
Preferably, the gas flowing through the valve in the image alignment device in the invention is compressed gas.
The invention has the beneficial effects that:
(1) the image alignment adjustment device provided by the invention has a simple structure, is easy to operate, and can read the error value simply and visually in the image alignment error debugging process.
(2) The filling and sealing mould used by the invention can adjust the coaxiality of the cathode input center and the shell center of the micro-light image intensifier to be filled and sealed through the screws.
(3) The inspection mould used by the invention can effectively inspect the encapsulated low-light-level image intensifier.
(4) The alignment value of the low-light-level image intensifier prepared by the invention is not more than 0.3 mm.
(5) The image alignment and adjustment device and method for the low-light-level image intensifier fundamentally solve the problems that the coaxiality of the cathode input center and the shell center of the low-light-level image intensifier to be encapsulated and encapsulated cannot be controlled and cannot be detected, the qualification rate of the image intensifier is improved, and the production cost is integrally reduced.
Drawings
FIG. 1 is a schematic diagram of the components of a calibration and inspection system used in the image alignment calibration and inspection method of the present invention.
In fig. 1: 1-focusing adjusting button, 2-lifting knob, 3-CCD camera, 4-upper contact ring, 5-pneumatic shaft, 6-lower contact ring, 7-light source, 8-valve, 9-display screen, 10-power supply, 11-voltage-stabilized power supply, 12-gas controller, 13-computer, 14-gas cylinder, 15-gas cylinder pressure regulating valve and pressure gauge, and 16-power supply lead.
Fig. 2 shows a potting mold with an unfinished microimage intensifier.
In fig. 2: 18-lower clamp, 19-shell, 20-upper clamp, 21-center ring, 22-cemented ring, 23-positioning screw, 24-upper press ring, 25-ring, 27-press ring, 28-first knurled screw, 29-second knurled screw, 30-third knurled screw, 31-fourth knurled screw, 32-connecting ring, 33-upper cone ring and 34-lower cone ring.
FIG. 3 is a top view of a potting mold with an un-potted microimage intensifier.
In fig. 3: 26-lining.
FIG. 4 is a schematic diagram of a low-light image intensifier.
In fig. 4: 35 a-shell, 35 b-low-light image intensifier tube, 35 c-high-voltage power supply, 35 d-atmosphere when not encapsulated and silicon rubber when encapsulated.
FIG. 5 is an inspection tool with encapsulated microimage intensifiers.
In FIG. 5: 36-upper ring, 35-low light image intensifier, 37-lower ring.
Detailed Description
The invention is described in more detail below with reference to the figures and examples, but the scope of the invention is not limited to the description.
An image alignment calibration and inspection system for use with a low-light image intensifier, the system comprising: CCD camera 3, light source 7, gas controller 12, valve 8 and constant voltage power supply 11. The CCD camera 3 is connected with a computer 13, and the computer 13 can be used for observing the cross line of the encapsulating mold or the inspection mold in real time for realizing calibration or inspection. The light source 7 provides a light source for the low-light-level image intensifier on the encapsulating mold or the checking mold, and the CCD camera 3 can shoot images. The gas controller 12 is connected with a gas source and supplies pneumatic power to the pneumatic shaft 5 through a valve 8. The stabilized voltage power supply 11 supplies power to the gas controller 12 as required.
The system also comprises a filling mold provided with a non-filled micro-optical image intensifier or an inspection mold provided with a filled micro-optical image intensifier, which is positioned between the upper contact ring 4 and the lower contact ring 6.
The encapsulating mold provided with the non-encapsulated micro-light image intensifier comprises: the micro-optical image intensifier comprises a lower clamp 18, a shell 19, an upper clamp 20, a center ring 21, a cementing ring 22, a positioning screw 23, an upper pressing ring 24, a ring 25, a pressing ring 27, first to fourth knurled screws 28-31, a connecting ring 32, an upper conical ring 33, a lower conical ring 34 and an un-encapsulated micro-optical image intensifier.
The inspection mold with the encapsulated micro-optical image intensifier comprises: an upper ring 36, a lower ring 37 and a micro-light image intensifier 35 which is encapsulated.
An image alignment calibration and inspection method applied to a low-light-level image intensifier specifically comprises the following steps:
a) the assembly sequence of the encapsulation mould provided with the micro-light image intensifier to be encapsulated is as follows: with the double faced adhesive tape with the knot ring 22 paste at the cathode surface of shimmer like the intensifier, then first annular knurl screw 28, set screw 23 is twisted on casing 19, will treat that shimmer like the intensifier 35 of embedment is put into casing 19, the positive pole end of shimmer like the intensifier places clamping ring 24 in proper order, clamping ring 27, twist on second annular knurl screw (29), place anchor clamps 20 again (attach ring 25), go up the awl ring 33, twist on third annular knurl screw 30, with the upset of casing bottom, place centre ring 21 on the cathode surface of shimmer like the intensifier in proper order, lower awl ring 34 reaches anchor clamps 18 down, then twist on fourth annular knurl screw 31.
b) The assembly sequence of the inspection mould provided with the encapsulated micro-light image intensifier is as follows: the lower ring 37 is filled with the encapsulated micro-optical image intensifier 35, and the upper ring 37 is placed above the lower ring 36.
c) And opening a computer 13, an air controller 12 and a valve 8 of the image alignment calibration and inspection system, and electrifying the air controller and the CCD camera.
d) The anode surface of the micro-light image intensifier to be encapsulated is upwards arranged in an encapsulating mould (figure 2) or the anode surface of the encapsulated micro-light image intensifier is upwards arranged in an inspection mould (figure 3).
e) The cylinder pressure regulating valve was adjusted so that the pressure indication of its pressure gauge was maintained at 0.2 MPa.
f) Mixing SF in a gas cylinder6And introducing gas into the encapsulating mold or the inspection mold.
g) A potting mold or inspection mold is placed over the lower contact ring 6.
h) And closing the pneumatic valve 8, disconnecting the compressed gas in the pneumatic shaft 5, and automatically dropping the upper contact ring 4 to the top end of the filling mold or the inspection mold.
i) The CCD camera working table is adjusted to be horizontal by adjusting the lifting knob 2, and then the focusing knob 1 is adjusted to focus light spots formed by the CCD camera on a cross line of the encapsulation mold or the inspection mold, so that the cross line can be clearly seen on a display screen of the computer 9.
j) The center of the cross line is coincident with the light spot formed by the CCD camera.
k) And rotating the encapsulating mold or the inspection mold, and observing whether the linear distance between the center of the cross line and the deviation of the light spot formed by the CCD camera is within 0.3 mm.
l) if the offset straight-line distance of the low-light image intensifier in the encapsulation mould exceeds 0.3mm, adjusting the first knurled screw 28, the second knurled screw 29 and the third knurled screw 30 to enable the offset straight-line distance of the encapsulation mould to be within a specified value, and if the offset straight-line distance of the image intensifier in the inspection mould exceeds 0.3mm, repairing the low-light image intensifier.
m) opening the pneumatic valve 8, so that the upper contact ring 4 is automatically lifted, and the filling and sealing mould or the inspection mould is taken down, thereby completing the image alignment value adjustment or the image alignment value inspection of the low-light-level image intensifier.
Claims (3)
1. The utility model provides an image alignment timing and inspection method for shimmer image intensifier, treats shimmer image intensifier of embedment to carry out the timing of image alignment value or carry out the inspection of image alignment value to the inspection mould of embedment shimmer image intensifier in the embedment mould, its characterized in that includes following step:
a) assembling an encapsulation mold or an inspection mold, comprising:
(1) the assembly of the low-light image intensifier in the encapsulating mould comprises: adhering a gluing ring (22) to the cathode surface of a low-light-level image intensifier by using double faced adhesive tape, screwing a first knurled screw (28) and a positioning screw (23) onto a shell (19), putting the low-light-level image intensifier (35) into the shell (19), sequentially placing an upper pressing ring (24), a pressing ring (27) and a second knurled screw (29) at the anode end of the low-light-level image intensifier, then placing an upper clamp (20) and a ring (25), screwing an upper conical ring (33), screwing a third knurled screw (30), overturning the bottom of the shell, sequentially placing a central ring (21), a lower conical ring (34) and a lower clamp (18) on the cathode surface of the low-light-level image intensifier, and screwing a fourth knurled screw (31);
or
(2) The assembly of the low-light image intensifier in the inspection mold comprises: a low-light-level image intensifier (35) is arranged in the lower circular ring (37), and then the upper circular ring (37) is placed above the lower circular ring (36);
b) open image alignment calibration and verification device comprising:
opening a computer (13), a gas control machine (12) and a valve (8) of the image alignment calibration and inspection system, and electrifying the gas control machine (12) and the CCD camera (3);
c) adjusting a gas cylinder pressure adjusting valve and a pressure gauge (15) to enable the pressure gauge to display a pressure value;
d) introducing gas in the gas cylinder (14) into a filling and sealing mould or an inspection mould;
e) placing an encapsulating mold or an inspection mold above the lower contact ring (6);
f) the valve (8) is closed to cut off the compressed gas in the pneumatic shaft (5), and the upper contact ring (4) automatically falls to the top end of the encapsulating mold or the inspection mold;
g) adjusting a focusing adjusting button (1) and a lifting knob (2), and focusing a light spot generated by a CCD camera (3) on a cross line of an encapsulation mold or an inspection mold to enable the cross line to be clearly visible on a display screen of a computer (9);
h) the center of the cross line is superposed with the light spot;
i) rotating the encapsulating mold or the inspection mold, and observing whether the linear distance between the center of the cross line and the offset of the light spot is within 0.3 mm;
j) if the offset linear distance of the low-light-level image intensifier in the encapsulating mold exceeds 0.3mm, the offset linear distance of the encapsulating mold is enabled to be within a specified value by adjusting a first knurled screw (28), a second knurled screw (29) and a third knurled screw (30) respectively, and then encapsulating is carried out; if the offset linear distance of the image intensifier in the inspection mould exceeds 0.3mm, the low-light-level image intensifier is repaired;
k) and opening the valve (8) to automatically lift the upper contact ring (4), taking down the filling and sealing mold or the inspection mold, and completing the image alignment value adjustment or the image alignment value inspection of the low-light-level image intensifier.
2. The method of claim 1, wherein: the gas in the gas cylinder (14) is SF6A gas.
3. The method of claim 1, wherein: the indicated values of the gas cylinder pressure regulating valve and the pressure gauge (15) are kept at 0.1-0.3 MPa.
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