CN102095390A - Method for accurately measuring included angles between optical axis of space optical communication terminal and positioning grinding surfaces on terminal - Google Patents

Abstract

The invention relates to a method for accurately measuring the included angles between the optical axis of a space optical communication terminal and positioning grinding surfaces on the end face of the terminal. The effect of the rotating factor of the mechanical rotary table on measurement is overcome by adopting the method. The method comprises the following steps: putting a plane mirror in front of an interferometer and adjusting the plane mirror to ensure the optical axis of the plane mirror to be parallel with the optical axis of the interferometer; putting the space optical communication terminal between the interferometer and the plane mirror and adjusting the space optical communication terminal to ensure the optical axis of the space optical communication terminal to be parallel with the optical axis of the plane mirror; putting an autocollimator between the interferometer and the space optical communication terminal and measuring the included angles between the reflecting optical axes of the positioning grinding surfaces on the end face of the space optical communication terminal and the optical axis of the autocollimator; removing the space optical communication terminal and measuring the included angle between the optical axis of the plane mirror and the optical axis of the autocollimator; and computing the included angles between the optical axis of the terminal and the positioning grinding surfaces on the end face of the terminal according to the included angles between the reflecting optical axes of the positioning grinding surfaces and the optical axis of the autocollimator as well as the included angle between the optical axis of the space optical communication terminal and the optical axis of the autocollimator.

Description

The accurate measurement method of space optical communication terminal optical axis and its location abrasive surface angle

Technical field

The present invention relates to the measuring method of angle between the location abrasive surface on space optical communication terminal optical axis and its end face.

Background technology

The space optical communication terminal system requires the terminal optical axis parallel with the mechanical axis strictness of terminal turntable in manufacture process, to guarantee the accurate aiming of emission light beam.Guarantee that at present the terminal optical axis erects the inner light path of space optical communication terminal come earlier with the strict parallel technological measure of the mechanical axis of terminal turntable often, to determine actual optical axis, guarantee mechanical axis parallel of optical axis and terminal turntable by grinding location abrasive surface on the terminal end face then.The problem that this method exists is: owing to not having or can not measure the optical axis of the inner light path of space optical communication terminal of building and the verticality of terminal end face in the optical communication terminal manufacture process, therefore follow-up in optical communication terminal and terminal turntable assembling process, often bigger to the grinding workload of location abrasive surface.

Summary of the invention

The accurate measurement method that the purpose of this invention is to provide a kind of space optical communication terminal optical axis and its location abrasive surface angle grinds the bigger defective of workload to overcome prior art in guaranteeing the space optical communication terminal optical axis technology parallel with the mechanical axis strictness of terminal turntable.It is realized by following step: one, place level crossing 2 before interferometer 1, adjust the orientation and the pitching of level crossing 2, make the optical axis of level crossing 2 parallel with interferometer 1 optical axis; Two, put into space optical communication terminal 3 between interferometer 1 and level crossing 2, the optical axis that utilizes interferometer 1 to be provided is adjusted the orientation and the pitching of space optical communication terminal 3, makes the optical axis of space optical communication terminal 3 parallel with the optical axis of level crossing 2; Three,, utilize location abrasive surface 3-1 reflection optical axis on autocollimator 4 measurement space optical communication terminals 3 end faces and the angle (α between autocollimator 4 optical axises at interferometer 1 and 3 placement autocollimators 4 of space optical communication terminal ₁, β ₁); Four, under not mobile autocollimator 4 situations, remove space optical communication terminal 3, utilize the angle (α of autocollimator 4 measurement plane mirrors, 2 optical axises and autocollimator 4 optical axises ₂, β ₂); Five, according to the angle (α that locatees abrasive surface 3-1 reflection optical axis and autocollimator 4 optical axises ₁, β ₁) and the angle (α of space optical communication terminal 3 optical axises and autocollimator 4 optical axises ₂, β ₂), can get the angle of space optical communication terminal 3 optical axises and its location abrasive surface 3-1 reflection optical axis

$\left\{\begin{array}{c}\mathrm{\Δ\α}={\mathrm{\α}}_2-{\mathrm{\α}}_1\\ \mathrm{\Δ\β}={\mathrm{\β}}_2-{\mathrm{\β}}_1\end{array}\right..$

Six, the angle of space optical communication terminal 3 optical axises and its location abrasive surface 3-1 reflection optical axis is pressed this formula

Be scaled the angle of space optical communication terminal 3 optical axises and its location abrasive surface 3-1.

Since the present invention can measurement space optical communication terminal optical axis and the space optical communication terminal end face on the angle of location abrasive surface, in building the process of light path, promptly can pay attention to and adjust, therefore can significantly reduce the grinding workload of location abrasive surface the optical axis and the angle problem of location abrasive surface.The present invention utilizes interferometer and autocollimator to make the measuring accuracy of satellite optical communication terminal optical axis and its location abrasive surface angle bring up to 0.5 μ rad.

Description of drawings

Fig. 1 is the synoptic diagram of step 1 of the present invention, and Fig. 2 is the synoptic diagram of step 2 of the present invention, and Fig. 3 is the synoptic diagram of step 3 of the present invention, figure, the 4th, the synoptic diagram of step 4 of the present invention.

Embodiment

Embodiment one: specify present embodiment below in conjunction with Fig. 1 to Fig. 4.Present embodiment realizes by following step: one, as shown in Figure 1, place level crossing 2 before interferometer 1, adjust the orientation and the pitching of level crossing 2, make the optical axis of level crossing 2 parallel with interferometer 1 optical axis; Two, then, as shown in Figure 2, between interferometer 1 and level crossing 2, put into space optical communication terminal 3, the optical axis that utilizes interferometer 1 to be provided, adjust the orientation and the pitching of space optical communication terminal 3, make the optical axis of space optical communication terminal 3 parallel with the optical axis of level crossing 2; Three,, as shown in Figure 3, utilize location abrasive surface 3-1 reflection optical axis on autocollimator 4 measurement space optical communication terminals 3 end faces and the angle (α between autocollimator 4 optical axises at interferometer 1 and 3 placement autocollimators 4 of space optical communication terminal ₁, β ₁); Four, then, under not mobile autocollimator 4 situations, remove space optical communication terminal 3, utilize the angle (α of autocollimator 4 measurement plane mirrors, 2 optical axises and autocollimator 4 optical axises ₂, β ₂), as shown in Figure 4.Because the optical axis of level crossing 2 is parallel with the terminal optical axis, therefore, (α ₂, β ₂) be the angle of space optical communication terminal 3 optical axises and autocollimator 4 optical axises.Five, according to the angle (α between location abrasive surface 3-1 reflection optical axis and autocollimator 4 optical axises ₁, β ₁) and the angle (α of space optical communication terminal 3 optical axises and autocollimator 4 optical axises ₂, β ₂), the angle that can get space optical communication terminal 3 optical axises and its location abrasive surface 3-1 reflection optical axis is

$\left\{\begin{array}{c}\mathrm{\Δ\α}={\mathrm{\α}}_2-{\mathrm{\α}}_1\\ \mathrm{\Δ\β}={\mathrm{\β}}_2-{\mathrm{\β}}_1\end{array}\right..$

Six, the angle of space optical communication terminal 3 optical axises and its location abrasive surface 3-1 reflection optical axis is pressed this formula

Be scaled the angle of space optical communication terminal 3 optical axises and its location abrasive surface 3-1.

Embodiment two: the difference of present embodiment and embodiment one is: described dawn, mirror 2 flatness was 1/50 λ to 1/100 λ, when adjusting the orientation of level crossing 2 and space optical communication terminal 3 and pitching with interferometer 1, being adjusted to interference fringe symmetry and wavefront root-mean-square value is that 1/50 λ to 1/100 λ gets final product.Choose the measuring accuracy that above-mentioned parameter promptly can reach 0.5 μ rad.

Claims (2)

1. the accurate measurement method of space optical communication terminal optical axis and its location abrasive surface angle, it is characterized in that it realizes by following step: one, at the preceding placement level crossing of interferometer (1) (2), adjust the orientation and the pitching of level crossing (2), make the optical axis of level crossing (2) parallel with interferometer (1) optical axis; Two, between interferometer (1) and level crossing (2), put into space optical communication terminal (3), the optical axis that utilizes interferometer (1) to be provided, adjust the orientation and the pitching of space optical communication terminal (3), make the optical axis of space optical communication terminal (3) parallel with the optical axis of level crossing (2); Three, between interferometer (1) and space optical communication terminal (3), place autocollimator (4), utilize location abrasive surface (3-1) reflection optical axis on autocollimator (4) measurement space optical communication terminal (3) end face and the angle (α between autocollimator (4) optical axis ₁, β ₁); Four, under not mobile autocollimator (4) situation, remove space optical communication terminal (3), utilize the angle (α of autocollimator (4) measurement plane mirror (2) optical axis and autocollimator (4) optical axis ₂, β ₂); Five, according to the angle (α between location abrasive surface (3-1) reflection optical axis and autocollimator (4) optical axis ₁, β ₁) and the angle (α of space optical communication terminal (3) optical axis and autocollimator (4) optical axis ₂, β ₂), can get the angle of space optical communication terminal (3) optical axis and its location abrasive surface (3-1) reflection optical axis

$\left\{\begin{array}{c}\mathrm{\Δ\α}={\mathrm{\α}}_2-{\mathrm{\α}}_1\\ \mathrm{\Δ\β}={\mathrm{\β}}_2-{\mathrm{\β}}_1\end{array}\right.;$

Six, the angle of space optical communication terminal (3) optical axis and its location abrasive surface (3-1) reflection optical axis is pressed this formula

Be scaled the angle of space optical communication terminal (3) optical axis and its location abrasive surface (3-1).

2. the accurate measurement method of space optical communication terminal optical axis according to claim 1 and its location abrasive surface angle, the flatness that it is characterized in that described mirror dawn (2) is 1/50 λ to 1/100 λ, when adjusting the orientation of level crossing (2) and space optical communication terminal (3) and pitching with interferometer (1), being adjusted to interference fringe symmetry and wavefront root-mean-square value is 1/50 λ to 1/100 λ.

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