CN110823528A

CN110823528A - Optical axis angle adjusting method

Info

Publication number: CN110823528A
Application number: CN201910985129.5A
Authority: CN
Inventors: 董续勇; 张华锋; 王鹏; 赵艳平; 高鹏涛
Original assignee: Luoyang Institute of Electro Optical Equipment AVIC
Current assignee: Luoyang Institute of Electro Optical Equipment AVIC
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-02-21
Anticipated expiration: 2039-10-16
Also published as: CN110823528B

Abstract

The invention relates to an optical axis angle adjusting method, belonging to the technical field of precision optical machine assembly and calibration, and relating to an optical axis adjusting method, which comprises the steps of adjusting the azimuth and the pitch angle of an infrared target source 1 to enable the optical axis of the infrared target source 1 to be parallel to an infrared component 2, detecting the azimuth angle deviation α and the pitch angle deviation β of the optical axis of a laser receiving component 3, and calculating according to a formula to obtain the thicknesses of three gaskets.

Description

Optical axis angle adjusting method

Technical Field

The invention belongs to the technical field of adjustment and calibration of precision optical machines, and relates to an optical axis adjustment and calibration method.

Background

The airborne photoelectric detection tracking system is used for detecting, tracking and ranging the target and guiding the laser-guided bomb to attack the target. The airborne photoelectric detection tracking system comprises an infrared assembly, a laser receiving assembly and a laser emitting assembly, in order to improve aiming accuracy and hitting accuracy of weapons, optical axes of the laser receiving assembly, the laser emitting assembly and the infrared assembly are often required to be parallel, an error is within 10 ″, accuracy cannot be guaranteed by part processing, and the optical axes of the three assemblies need to be corrected by using a gasket. The previous installation and calibration method comprises the following steps: firstly, adjusting the azimuth and the pitching angle of an infrared target source 1 to enable the optical axis of the infrared target source 1 to be parallel to an infrared assembly 2, then detecting the optical axis of a laser receiving assembly 3, if the optical axis of the laser receiving assembly 3 is not parallel to the infrared target source 2, adjusting the thicknesses of a gasket 4, a gasket 5, a gasket 6 and a gasket 7, then retesting the optical axis deviation of the laser receiving assembly 3, if the optical axis deviation exists, continuously adjusting the thicknesses of the gasket 4, the gasket 5, the gasket 6 and the gasket 7 according to the optical axis deviation direction, and repeating the steps until the optical axis of the laser receiving assembly 3 is parallel to the optical axis of the infrared target source 1. The method has the defects that the thickness of the gasket is determined through repeated trial assembly, the thickness of the gasket is inaccurate, the assembly stress is large, and after a period of time, the optical axis is changed frequently, so that the laser receiving optical axis is not parallel to the infrared optical axis, the aiming precision of the airborne photoelectric detection tracking system is influenced, and the striking precision is influenced.

Disclosure of Invention

The purpose of the invention is: the optical axis angle debugging method solves the problems of large stress and poor precision caused by repeated trial assembly of the gasket.

The technical scheme of the invention provides an optical axis angle adjusting method, which comprises the steps of firstly detecting the deviation angle of the optical axes of a laser receiving assembly 3 and an infrared assembly 2, and calculating the compensation amount to be adjusted according to the deviation angle of the optical axes.

Preferably, the optical axis angle adjusting method includes the following steps:

step 1, adjusting the azimuth and the pitching angle of the infrared target source 1 to enable the optical axis of the infrared target source 1 to be parallel to the infrared component 2

Step 2, detecting the azimuth angle deviation α and the pitch angle deviation β of the optical axis of the laser receiving assembly 3;

and 3, establishing an equation according to the azimuth angle deviation α, the pitch angle deviation β and the position of the gasket mounting hole, and calculating to obtain the theoretical thickness of the gasket.

Preferably, in the optical axis angle calibration method, in step 3, a coordinate system is established according to the positions of the gasket mounting holes, the plane coordinates x and y of the gasket compensation position are known, and the gasket height coordinate z is calculated and solved through an equation.

Preferably, in the optical axis angle adjusting method, the number of the gasket compensation positions is not less than three.

Preferably, in the method for adjusting an angle of an optical axis, when the number of the shim compensation positions is three, the calculation equation includes:

x₃+k₁y₃+k₂z₃＝0

wherein x1, y1, x2, y2, x3, y3 and α are known quantities, z1, z2, z3, k1 and k2 are quantities to be solved, wherein z1, z2 and z3 are height coordinates of the gasket to be solved.

Preferably, in the optical axis angle tuning method, each time a shim compensation position is added, the equation xn + k1yn + k2zn is substituted into 0 according to the plane coordinate xnyn of the added shim compensation position, so that the height coordinate zn of the added shim can be obtained.

According to the invention, through optical test and calculation, accurate gasket parameters are directly obtained, the problem caused by repeated gasket trial installation is avoided, the adjustment precision of the optical axis is improved, the assembly stress is reduced, the stability of the optical axis is improved, and the assembly and calibration efficiency is improved.

Drawings

Fig. 1 is a schematic view of optical axis adjustment;

FIG. 2 is a schematic view of the gasket position;

FIG. 3 is a gasket position diagram;

FIG. 4 is a diagram of the coordinate positions of the first embodiment shim;

FIG. 5 is a diagram of a second embodiment shim coordinate position.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.

And adjusting the azimuth and the pitching angle of the infrared target source 1 to enable the optical axis of the infrared target source 1 to be parallel to the infrared assembly 2.

Detecting an azimuth angle deviation α and a pitch angle deviation β of the optical axis of the laser receiving module 3;

a coordinate system is established, and coordinate points of the four shims, i.e., the shim 4, the shim 5, the shim 6 and the shim 7 are O (0, 0, 0), z1(x1, y1, z1), z2(x2, y2, z2), z3(x3, y3, z3), wherein the shim 4 is used as a coordinate origin and the thickness is recorded as 0.

Equation set (1):

x₃+k₁y₃+k₂z₃0 equation (3)

Wherein x1, y1, x2, y2, x3, y3 and α are known quantities, z1, z2, z3, k1 and k2 are quantities to be solved, the 5 equations can be used for solving 5 unknowns to be solved, wherein z1, z2 and z3 are thicknesses of the gasket to be solved.

z1＝-(sin(α)*x1+sin(β)*y1)/(cos(α)+cos(β))

z2＝-(sin(α)*x2+sin(β)*y2)/(cos(α)+cos(β))

z3＝-(sin(β)*y3+sin(α)*x3)/(cos(α)+cos(β))

Example 1

The azimuth deviation-1 'and the pitch deviation-1.5' of the laser receiving optical axis, the coordinates of the three shims are shown in FIG. 4, and are O (0, 0, 0), z1(-42.5, 162.5, z1), z2(219, 145, z2), z3 (219, 3.5, z3), the three shims are substituted into equations (1), (2) and (3), and the equations are solved to obtain

z1＝0.029mm

z2＝0.063mm

z3＝0.032mm

Example 2

The azimuth deviation of the laser receiving optical axis is-30 ', the pitch deviation is-1.5', and 6 shim coordinates are shown in FIG. 5, which are O (0, 0, 0), z1(0, 307.5, z1), z2(230.4, 307.5, z2), z3 (0, 128.2, z3), z4(230.4, 128.2, z4), and z5(230.4, 0, z5) and are substituted into equation sets (1), (2), (3), and then the equations are solved to obtain the target values

z1＝0.067mm

z2＝0.084mm

z3＝0.030mm

z4＝0.045mm

z5＝0.017mm。

Claims

1. An optical axis angle adjusting method is characterized in that the deviation angle of the optical axis of a laser receiving assembly (3) and the optical axis of an infrared assembly (2) is detected, and compensation quantity needing to be adjusted is calculated according to the deviation angle of the optical axis.

2. The optical axis angle adjusting method according to claim 1, comprising the following steps:

step 1, adjusting the azimuth and the pitching angle of the infrared target source (1) to enable the optical axis of the infrared target source (1) to be parallel to the infrared component (2)

Step 2, detecting the azimuth angle deviation α and the pitch angle deviation β of the optical axis of the laser receiving assembly (3);

3. The optical axis angle adjusting method as claimed in claim 2, wherein in step 3, a coordinate system is established according to the positions of the gasket mounting holes, the plane coordinates x and y of the gasket compensation positions are known, and the gasket height coordinate z is calculated and solved through an equation.

4. The method of claim 3, wherein the number of shim compensation positions is not less than three.

5. The optical axis angle adjusting method according to claim 3, wherein when the shim compensation positions are three, the calculation equation includes:

x₃+k₁y₃+k₂z₃＝0

6. The method as claimed in claim 5, wherein the height coordinate zn of the added shim is obtained by substituting the plane coordinate xnyn of the added shim compensation position into the equation xn + k1yn + k2zn equal to 0 when adding a shim compensation position.