KR20130078781A - Apparatus for balacing and aligning optical axis of optical gyro - Google Patents

Apparatus for balacing and aligning optical axis of optical gyro Download PDF

Info

Publication number
KR20130078781A
KR20130078781A KR1020110147902A KR20110147902A KR20130078781A KR 20130078781 A KR20130078781 A KR 20130078781A KR 1020110147902 A KR1020110147902 A KR 1020110147902A KR 20110147902 A KR20110147902 A KR 20110147902A KR 20130078781 A KR20130078781 A KR 20130078781A
Authority
KR
South Korea
Prior art keywords
optical
gyro
optical gyro
balancing
optical axis
Prior art date
Application number
KR1020110147902A
Other languages
Korean (ko)
Inventor
이용덕
Original Assignee
엘아이지넥스원 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘아이지넥스원 주식회사 filed Critical 엘아이지넥스원 주식회사
Priority to KR1020110147902A priority Critical patent/KR20130078781A/en
Publication of KR20130078781A publication Critical patent/KR20130078781A/en

Links

Images

Classifications

    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/56—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G01C19/58—Turn-sensitive devices without moving masses
    • G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
    • G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
    • G01C19/721—Details

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Gyroscopes (AREA)

Abstract

The present invention relates to an optical gyro balancing and optical axis alignment device capable of balancing and optical axis alignment. The present invention is an optical gyro driving unit for rotating the optical gyro; A simulation signal generator for generating infrared rays to align the optical axis of the optical gyro; And a balancing sensing unit configured to sense an amount of mass imbalance generated during rotation of the optical gyro.

Description

Optical Gyro Balancing and Optical Axis Alignment Equipment {APPARATUS FOR BALACING AND ALIGNING OPTICAL AXIS OF OPTICAL GYRO}

The present invention relates to an optical gyro balancing and optical axis alignment device, and more particularly, to an optical gyro balancing and optical axis alignment device that can be combined with the balance and optical axis alignment.

In general, an optical gyro (Gyro) refers to a device that tracks an infrared target while rotating the infrared detector. The optical gyro includes a rotating light receiver and a fixed signal detector.

In the case of a rotor in an ideal state, the axis of inertia of the rotor coincides with the axis of rotation of the rotor in all motions. In practice, however, this is not the case, so centrifugal forces and moments are generated and a large force is transmitted to the bearing or support structure supporting the rotating body. If the rotor is largely unbalanced, the movement becomes large in correspondence with the degree of imbalance, thereby destroying the bearings and the supporting structure supporting the rotor. Therefore, balancing is necessary because the light receiving portion of the optical gyro rotates at high speed. In addition, in order to precisely operate the optical gyro, optical axis alignment of the light receiver and the signal detector is also required. Therefore, in order to precisely track the infrared target using the optical gyro, precise balancing and optical axis alignment of the light receiver and the signal detector are required.

However, according to the related art, since the optical axis alignment is performed by separating the optical axis from the optical gyro in the optical axis alignment device and then performing the balancing in a separate balancing device, the balancing and the optical axis alignment are time-consuming and cumbersome. There is a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide an optical gyro balancing and optical axis alignment device that can perform balancing and optical axis alignment in one device.

In order to solve the above problems, the present invention, the optical gyro driving unit for rotating the optical gyro; A simulation signal generator for generating infrared rays to align the optical axis of the optical gyro; And it provides an optical gyro balancing and optical axis alignment device comprising a balancing sensing unit for sensing the mass imbalance amount generated during the rotation of the optical gyro.

The optical gyro driving unit includes an insertion hole in which the optical gyro is inserted and rotated; And a coil block including a head coil wound around the insertion hole and to which a current is applied to rotate the optical gyro.

The balancing sensing unit may include a laser pointer for measuring the progress of rotation synchronization of the optical gyro when the optical gyro rotates.

The balancing sensing unit may include a balance sensor that measures an amount of vibration generated by mass imbalance of the optical gyro when the optical gyro rotates.

The balancing sensing unit may further include an oscilloscope for displaying an amount of mass imbalance generated when the optical gyro rotates.

The simulation signal generation unit, an infrared ray generator for generating an infrared ray; And it may include a collimator for converting the infrared light generated by the infrared generator into parallel light. In this case, the simulation signal generator may further include a support for adjusting the azimuth and elevation of the collimator to align the optical axis of the infrared ray output from the optical gyro with the optical axis. The support may include a lower support rotatably supported about a vertical axis of rotation; And an upper support coupled to the lower support to be rotatable about a hinge axis in a horizontal direction, wherein the infrared generator and the collimator are preferably placed on the upper support.

The collimator may include a parabolic mirror disposed so that the concave reflective surface faces the infrared generator and the optical gyro, and converts infrared rays generated from the infrared generator into parallel light.

In addition, the collimator, the parabolic is accommodated therein, it is preferable that the inner wall further comprises a barrel which is an infrared anti-reflective coating.

According to one embodiment of the present invention, the balancing and optical axis alignment of the optical gyro can be performed in one device, thereby reducing the time required for balancing and optical axis alignment.

1A is a view illustrating an optical gyro balancing and optical axis alignment device viewed from one side according to an embodiment of the present invention.
1B is a view showing an optical gyro balancing and optical axis alignment device viewed from another side according to an embodiment of the present invention.
2A is an exploded view of an optical gyro in which balancing and optical axis alignment are performed by an optical gyro balancing and optical axis alignment device according to an embodiment of the present invention.
FIG. 2B is a coupling diagram of the optical gyro of FIG. 2A.
Fig. 3 is a diagram showing the optical axis alignment states of the light receiving portion and the signal detection portion of the optical gyro, (a) shows a state where the optical axis alignment is poor, and (b) shows a state where the optical axis alignment is good.
4 shows signals detected by the signal detector according to the optical axis alignment state of the optical gyro, (a) is a detection signal in a poor optical axis alignment state, and (b) is a detection signal in a good optical axis alignment state.
FIG. 5 illustrates an optical gyro driver of an optical gyro balancing and optical axis alignment device according to an exemplary embodiment of the present invention.
6 is a view illustrating a state in which an optical gyro is inserted into the coil block of FIG. 5.
7 illustrates a target of an optical gyro balancing and optical axis alignment device according to an embodiment of the present invention.
8 illustrates a collimator of an optical gyro balancing and optical axis alignment device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Figure 1a is a view showing an optical gyro balancing and optical axis alignment device according to an embodiment of the present invention from one side, Figure 1b is an optical gyro balancing and optical axis alignment device according to an embodiment of the present invention from the other side It is a figure which shows what it looked at. 2A is an exploded view of an optical gyro in which balancing and optical axis alignment are performed by an optical gyro balancing and optical axis alignment device according to an embodiment of the present invention, and FIG. 2B is a coupling diagram of the optical gyro of FIG. 2A.

3 is a view showing the optical axis alignment state of the light receiving portion and the signal detection portion of the optical gyro, (a) shows a state in which the optical axis alignment is poor, and (b) shows a state in which the optical axis alignment is good. 4 shows signals detected by the signal detector according to the optical axis alignment state of the optical gyro, (a) is a detection signal in a poor optical axis alignment state, and (b) is a detection signal in a good optical axis alignment state.

FIG. 5 is a view illustrating an optical gyro driving unit of an optical gyro balancing and optical axis alignment device according to an embodiment of the present invention, and FIG. 6 is a view illustrating a state in which the optical gyro is inserted into the coil block of FIG. 5. 7 and 8 are diagrams illustrating a target and a collimator of the optical gyro balancing and optical axis alignment device according to the embodiment of the present invention, respectively.

1, an optical gyro balancing and optical axis alignment device according to an embodiment of the present invention is a device for performing balancing and optical axis alignment for an optical gyro 900, and includes a balancing sensing unit and an optical gyro driver 300. And a simulated signal generator 200.

The optical gyro 900 in which balancing and optical axis alignment are performed by the present invention includes a light receiving unit 920 rotating around the optical axis and a signal detection unit 940 fixed to the fixing member. The optical gyro 900 is fixed to the biaxial gimbal 960, and rotates the light-receiving unit 920 having a large moment of inertia at high speed to have a large momentum. Directivity can be maintained even under disturbance caused by

The light receiving unit 920 rotates by the current change by the coil of the optical gyro driving unit 300 to focus the infrared rays of the target to be coupled to the signal detection unit 940. The signal detector 940 includes a plurality of detection cells 942, and converts infrared rays focused on the detection cells 942 into electrical signals. Therefore, in the optical gyro 900, the optical axes of the light receiver 920 and the signal detector 940 should be aligned. The optical gyro 900 may include optical axis adjusting means for adjusting the pitch angle and the yaw angle of the light receiver 920 to align the optical axes of the light receiver 920 and the signal detector 940. In addition, a balancing adjustment means such as a balancing screw may be provided for balancing the optical gyro 900.

5 and 6, the optical gyro driver 300 rotates the light receiving unit 920 of the optical gyro 900 about the rotation axis in a state where the optical axis is fixed. The optical gyro driver 300 includes a coil block 340 for rotating the optical gyro 900. The coil block 340 includes an insertion hole 342 into which the optical gyro 900 is inserted, and a head coil 344 wound around the insertion hole 342 and to which a current is applied to rotate the light receiver 920. do. The optical gyro driver 300 rotates the optical gyro 900 at a constant rotational speed, for example, a speed of 100 Hz. The optical gyro driver 300 may include a signal amplifier for amplifying the weak electrical signal of the signal detector 940.

The balancing sensing unit includes a laser pointer (not shown), an oscilloscope 120, and a balance sensor 160. The balancing sensing unit senses an amount of mass imbalance generated when the optical gyro 900 rotates.

The balance sensor 160 is provided under the optical gyro driver 300 to measure the amount of vibration generated by mass imbalance when the optical gyro 900 rotates.

The laser pointer detects a rotation period of the optical gyro 900 by irradiating a laser on the optical gyro 900. At this time, it is preferable that a marking that can be a reference point is displayed on the outer circumferential surface of the optical gyro 900. When only the balance sensor 160 is provided without the laser pointer, the mass imbalance amount of the optical gyro 900 can be found, but it is difficult to know in which direction the optical gyro 900 is unbalanced with respect to the rotation axis. However, when the rotation period of the optical gyro 900 is detected by the laser pointer, the rotational cycle of the optical gyro 900 may be interlocked with the measured value of the balance sensor 160 to easily determine whether or not the mass imbalance is formed at an angle from the reference point. . In other words, the rotation angle of the optical gyro 900 with time can be known by the laser pointer, and the mass imbalance amount of the optical gyro 900 with time can be known by the balance sensor 160. The mass imbalance amount according to the rotation angle of the optical gyro 900 can be known, and this can be used for balancing the optical gyro 900.

When the optical gyro 900 rotates while being irradiated, the optical gyro 900 eccentrically rotates due to the mass imbalance of the optical gyro 900. That is, the laser pointer measures rotational synchronous vibration caused by mass imbalance when the optical gyro 900 rotates.

The oscilloscope 120 is connected to the laser pointer and the balance sensor 160 to display the mass imbalance and the moment imbalance generated when the optical gyro 900 rotates.

The simulation signal generator 200 simulates an infrared target located at a long distance for optical axis alignment of the optical gyro 900. The simulation signal generating unit 200 is an infrared ray generator 220 for generating infrared rays, a collimator 240 for converting the infrared rays generated by the infrared generator 220 into far parallel light, and the optical axis of the infrared ray output from the collimator 240 Support 260 for aligning with the optical axis of the optical gyro 900.

Referring to FIG. 7, the infrared ray generator 220 includes a light source 222, a transmission unit 224, a light source stage 226, and a stage adjusting unit 228.

The light source 222 generates infrared rays for optical axis alignment of the optical gyro 900. The light source 222 is preferably a DC light source for irradiating a constant light over time. The transmission unit 224 is provided in front of the light source 222, and has a pin hole 225 for passing the infrared light generated from the light source 222 to adjust the amount of infrared light emitted from the infrared generator 220. The light source stage 226 supports the light source 222 and is provided in a movable structure to adjust a distance between the light source 222 and the optical gyro 900. The stage adjusting means 228 moves the light source stage 226 by a user's manipulation. The stage adjusting means 228 may move the light source stage 226 by, for example, a ball screw method.

Referring to FIG. 8, the collimator 240 includes a barrel 242, a parabola 244, a parabolic mount 246, and a biaxial adjuster 248.

The barrel 242 accommodates the parabolic mirror 244 therein. Parabola 244 has a parabolic reflecting surface and is disposed in barrel 242 by parabolic mount 246 such that the concave reflecting surface faces infrared generator 220 and optical gyro 900. The parabolic mirror 244 converts infrared light emitted from the light source 222 of the infrared ray generator 220 into parallel light. The inner wall of the barrel 242 is preferably an infrared anti-reflective coating to prevent the generation of infrared noise. In addition, the parabolic mirror 244 may be fine-tuned by the biaxial adjuster 248.

9, the support 260 includes a lower support 262 and an upper support 264. The lower supporter 262 is supported on the main stage 800 to be rotatable about an axis of rotation 261 in the vertical direction, that is, to adjust the azimuth angle. The upper support 264 is coupled to the lower support 262 to be rotatable about the hinge axis 263 in the horizontal direction, that is to adjust the elevation. In this case, the infrared generator 200 and the collimator 240 are placed on the upper support 264. One side of the lower support 262 is provided with an azimuth angle adjusting means 265 for adjusting the yaw angle of the lower support 262 relative to the main stage 800, one side of the upper support 264 Elevation adjustment means 266 is provided for adjusting the pitch angle of the upper support 264 with respect to 262. By adjusting the azimuth and elevation of the support 260 while the optical gyro 900 is fixed to the main stage 800, the infrared rays emitted from the collimator 240 may be aligned with the optical axis of the optical gyro 900. In order to precisely adjust the optical axis, the lower support 262 and the upper support 264 is preferably formed of a structure that can be moved finely. In addition, when the azimuth and elevation adjustment of the upper support 264 and the lower support 262 is completed, it is preferable that the upper support 264 and the lower support 262 is formed in a structure that can be fixed so as not to move.

Hereinafter, the optical gyro balancing and optical axis alignment process by the optical gyro balancing and optical axis alignment device according to the present embodiment will be described with reference to the above-described components.

First, the optical gyro 900 is mounted on the optical gyro driver 300 so that the light receiver 920 faces the infrared generator 220 of the mock signal generator 200, and then the light receiver 920 of the optical gyro 900 is mounted. Rotate In this case, balancing is performed on the optical gyro 900 such that the mass imbalance amount of the optical gyro 900 displayed on the balancing sensing unit is equal to or less than a predetermined value, for example, 0.5 gmm or less.

After performing the balancing, the optical axis alignment of the optical gyro 900 is performed by using the infrared rays generated by the infrared generator 220 of the simulation signal generator 200 and incident on the optical gyro 900 through the collimator 240. As shown in FIG. 4, when the optical axis alignment state of the light receiver 920 and the signal detector 940 is good, the detection signal when the infrared ray is incident on the optical gyro 900 and detected by the four detection cells 942. Has a constant period, but the period of the detection signal detected by the detection cell 942 is not constant when the optical axis alignment state is poor. Accordingly, the optical axis of the light receiver 920 and the signal detector 940 is analyzed by analyzing the period of the detection signal generated when the infrared ray is incident on the optical gyro 900 and passes through the four detection cells 942 of the signal detector 940. Can be aligned.

After the optical axis alignment of the optical gyro 900 is performed, the balancing of the optical gyro 900 is performed again using a balancing sensing unit to remove the mass imbalance due to the optical axis alignment.

Thereafter, the detection signal by the infrared rays generated from the infrared generator 220 is checked to check whether the optical axis of the optical gyro 900 is aligned. If the optical axis of the optical gyro 900 is not aligned, the optical axis alignment is performed again. do.

The above process may be repeated to perform balancing and optical axis alignment on the optical gyro 900.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. . Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

120: oscilloscope 220: infrared generator
240: collimator 260: support
300: optical gyro drive unit 800: main frame

Claims (10)

An optical gyro driver for rotating the optical gyro;
A simulation signal generator for generating infrared rays to align the optical axis of the optical gyro; And
Balancing sensing unit for sensing the mass imbalance generated during the rotation of the optical gyro
Optical gyro balancing and optical axis alignment device comprising a. The method of claim 1,
The optical gyro drive unit,
An insertion hole into which the optical gyro is inserted and rotated; And
A coil block including a head coil wound around the insertion hole and to which a current is applied to rotate the optical gyro.
Optical gyro balancing and optical axis alignment device. The method of claim 1,
The balancing sensing unit,
It includes a balance sensor for measuring the amount of vibration generated by the mass imbalance of the optical gyro during the rotation of the optical gyro
Optical gyro balancing and optical axis alignment device. The method of claim 3,
The balancing sensing unit,
Further comprising a laser pointer for measuring the rotation period of the optical gyro during the rotation of the optical gyro
Optical gyro balancing and optical axis alignment device. The method of claim 1,
The balancing sensing unit,
It further includes an oscilloscope for displaying the mass imbalance generated during the rotation of the optical gyro
Optical gyro balancing and optical axis alignment device. The method of claim 1,
The simulation signal generator,
An infrared ray generator for generating infrared rays for optical axis alignment of the optical gyro; And
Comprising a collimator for converting the infrared light generated by the infrared generator into parallel light
Optical gyro balancing and optical axis alignment device. The method according to claim 6,
The simulation signal generator,
And a support for adjusting the azimuth and elevation of the collimator to align the optical axis of the infrared ray output from the optical gyro with the optical axis.
Optical gyro balancing and optical axis alignment device. The method of claim 7, wherein
[0028]
A lower support rotatably supported about a rotation axis in a vertical direction; And
An upper support coupled to the lower support to be rotatable about a hinge axis in a horizontal direction,
The infrared generator and the collimator on the upper support an optical gyro balancing and optical alignment device. The method according to claim 6,
The collimator,
A concave reflective surface is disposed facing the infrared ray generator and the optical gyro, and includes a parabolic mirror for converting infrared rays generated from the infrared ray generator into parallel light.
Optical gyro balancing and optical axis alignment device. The method according to claim 6,
The collimator,
The parabolic is accommodated therein, the inner wall further comprises a barrel which is an infrared anti-reflective coating
Optical gyro balancing and optical axis alignment device.
KR1020110147902A 2011-12-30 2011-12-30 Apparatus for balacing and aligning optical axis of optical gyro KR20130078781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110147902A KR20130078781A (en) 2011-12-30 2011-12-30 Apparatus for balacing and aligning optical axis of optical gyro

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110147902A KR20130078781A (en) 2011-12-30 2011-12-30 Apparatus for balacing and aligning optical axis of optical gyro

Publications (1)

Publication Number Publication Date
KR20130078781A true KR20130078781A (en) 2013-07-10

Family

ID=48991656

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110147902A KR20130078781A (en) 2011-12-30 2011-12-30 Apparatus for balacing and aligning optical axis of optical gyro

Country Status (1)

Country Link
KR (1) KR20130078781A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109297513A (en) * 2018-12-11 2019-02-01 北京遥感设备研究所 A kind of infrared electric light source detector field of view of power gyro and blind area automatic aligning method
KR101986654B1 (en) * 2017-12-20 2019-06-07 주식회사 한화 Force measuring apparatus for mass imbalance measurement of hemispherical resonator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101986654B1 (en) * 2017-12-20 2019-06-07 주식회사 한화 Force measuring apparatus for mass imbalance measurement of hemispherical resonator
CN109297513A (en) * 2018-12-11 2019-02-01 北京遥感设备研究所 A kind of infrared electric light source detector field of view of power gyro and blind area automatic aligning method

Similar Documents

Publication Publication Date Title
CN105026884B (en) The method for seeking the error of system for seeking rotation position
CN107769845B (en) Star double light path be aligned ground validation system
CN206132076U (en) Motion target simulation device
CN107132028A (en) The big off-axis three reflecting optical systems MTF test devices in visual field and method of testing
CN108519103A (en) Utilize the stabilized platform multi-pose accurate synchronization evaluation device and method of autocollimator
Giuliani et al. Six degrees of freedom measurement with continuous scanning laser doppler vibrometer
CN110987013A (en) Method and device for calibrating gyroscope angular motion measurement system
CN109696712A (en) A kind of Underwater Target Detection system of polarization imaging measurement
KR20130078781A (en) Apparatus for balacing and aligning optical axis of optical gyro
CN106352898A (en) Moving target simulation device and calibration method
CN102788565B (en) A kind of support plate right alignment adjustment measuring system and measuring method
CN103076305B (en) Device for measuring surface diffuse reflectivity of material
CN116859374B (en) Laser radar wind measurement calibration method
CN107830822A (en) A kind of opto-electrical angle measuring apparatus
CN101592519B (en) Synchronous reflection distributing photometer
CN209229249U (en) A kind of fixed bracket of multi-functional instrument instruments and meters
CN103744438A (en) Spherical stable tracking platform
CN113739820A (en) Single-shaft sudden stop turntable based on gyroscope characteristics
CN106091903B (en) The large-scale spiral arm flexure quantity measuring method and device of benchmark are determined based on biplane
CN101504278A (en) Detection apparatus and method for assembly error of laser head semi-transparent semi-reflecting lens
CN111982153B (en) Method and system for testing collimation model of inertial navigation platform of submarine-launched missile
CN102253004A (en) Sub-angstrom-level super-smooth transparent surface test system based on differential scattering
CN105910758A (en) Measuring mechanism for contact ratio of center of mass and optical center of falling body and measuring method and adjusting method thereof
CN104655409B (en) Space optical remote sensor focus adjusting mechanism simulates in-orbit gravity release detection method
CN108418627B (en) Portable testing device for receiving field angle through laser communication

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application