CN206192633U - Optical transmission equipment instrument constant calibration system - Google Patents

Abstract

The utility model belongs to the technical field of precision optical testing and relates to an instrument constant calibration system for optical transmission equipment. The calibration system includes an autocollimation theodolite, an adjustable base, a reference tool and a turning light pipe; the reference tool is installed on the adjustable base; a reference prism is installed on the side of the reference tool; the turning light tube is vertically installed on the first reference tool side; the light entrance of the diverting light pipe faces the autocollimation theodolite, and the light exit of the diverting light pipe faces the reference prism. The utility model directly reads the azimuth value of the reference prism through the turning light pipe, reduces the alignment times and improves the measurement efficiency. At the same time, there is no need to move and rotate the theodolite back and forth during the test, which reduces the measurement error caused by the theodolite level.

Description

Calibration system for instrument constants of optical transmission equipment

technical field

The utility model belongs to the technical field of precision optical testing and relates to an instrument constant calibration system for optical transmission equipment.

Background technique

Optical transmission equipment is mainly used for calibration and measurement of star sensors. It transmits the north reference to the star sensor by outputting star points, and is currently widely used in the positioning and calibration of star sensors. The instrument constant (that is, the angle between the optical axis of the star model and the reference prism) is an important technical index of optical transmission equipment and a standard for measuring the performance of optical transmission equipment.

In the process of calibrating the instrument constants of the optical transmission equipment, the plane mirror is mainly used as a reference, and the theodolite is used to self-align the plane mirror to read the azimuth value first, and the optical transmission equipment is placed on the reference tooling to read the misalignment angle value of the autocollimator. Align the star point of the optical transmission equipment to read the azimuth value, then remove the autocollimation theodolite and place it between the reference tooling and the plane mirror, and read the azimuth value for the plane mirror and the reference prism respectively, and finally obtain the optical transmission equipment through calculation Instrument constants, the test process needs to be aligned more times, so the calibration process has higher requirements for testers. At the same time, since the theodolite needs to be rotated during the calibration process, higher requirements are put forward for the theodolite level, and the test process has higher requirements for personnel and equipment.

Contents of the invention

In order to solve the technical problems of the existing optical transmission equipment instrument constant calibration method with cumbersome steps and high precision requirements of theodolite, the utility model provides a high-efficiency optical transmission equipment instrument constant calibration system and its calibration method.

The technical solution of the utility model is: an instrument constant calibration system for optical transmission equipment, which is special in that it includes an autocollimation theodolite, an adjustable base, a reference tool and a steering light pipe;

The reference tool is installed on an adjustable base, and the adjustable base is used to adjust the level; a reference prism is installed on the reference tool;

The turning light pipe is installed vertically on one side of the reference tool; the light entrance of the turning light pipe faces the autocollimation theodolite, and the light exit of the turning light pipe faces the reference prism.

A roof prism is installed in the turning light pipe; light enters through the light entrance, is reflected by the roof prism, and then exits through the light exit.

The reference prism mentioned above is a rectangular prism.

The measurement error of the above-mentioned autocollimating theodolite is not more than 1″.

The top of the reference tooling is equipped with a vertically arranged backing surface, and the optical transmission equipment to be calibrated is closely attached to the backing surface.

The utility model also provides an instrument constant calibration method for optical transmission equipment, which is special in that it includes the following steps:

1] Build the instrument constant calibration system for optical transmission equipment as claimed in claim 1;

2) Use a level to adjust the adjustable base to make the reference tooling table level;

3) Place the optical transmission equipment to be tested on the benchmark tooling table;

4) Turn on the autocollimator theodolite and adjust the level, and read the output value S of the misalignment angle of the autocollimator on the optical transmission device at this time;

5) Align the autocollimation theodolite with the star point image center of the optical transmission equipment, and read the star point azimuth value H ₁ ;

6) Take away the optical transmission equipment, and read the reference prism azimuth value H ₂ ;

7] Calculate the instrument constant α ₁ of the optical transmission device according to the formula α ₁ =H ₁ -H ₂ -S+ΔL; where ΔL is a constant representing the azimuth error of the steering light pipe.

The beneficial effect of the utility model lies in that the utility model directly reads the azimuth value of the reference prism through the turning light pipe, reduces the number of alignments, and improves the measurement efficiency. At the same time, there is no need to move and rotate the theodolite back and forth during the test, which reduces the measurement error caused by the theodolite level.

Description of drawings

Fig. 1 is a schematic structural diagram of the instrument constant calibration system of the optical transmission equipment of the present invention.

detailed description

Referring to Fig. 1, the utility model provides a calibration system for instrument constants of optical transmission equipment. Light pipe 4. The optical transmission device 5 belongs to the device under inspection, and it is composed of a star model 51 and an autocollimator 52 . The autocollimating theodolite 1 has a display screen, which can display azimuth and elevation values in real time. The autocollimating theodolite 1 is placed in front of the objective lens of the optical transfer device 5 and leveled. The adjustable base 2 is used to level the reference tool 3 in both horizontal and pitch directions (various existing adjustable bases can be selected, such as the base of an electronic balance). The reference tooling 3 is a cube tooling. A reference prism 6 is installed on one side of the reference tooling 3. The reference prism is preferably a right-angle prism, because the right-angle prism is only sensitive to azimuth changes, but not to pitch changes. The azimuth value of the rectangular prism can be displayed on the misalignment angle of the autocollimator through the turning light pipe 4 . The diverting light pipe 4 has two light openings, which are respectively the light entrance and the light exit. There is a certain distance between the two light passages, and a roof prism is installed inside. The light exit exits (the steering angle is preferably 180°), the light entrance of the diverting light pipe 4 faces the autocollimating theodolite 1 , and the light exit of the diverting light pipe 4 faces the reference prism 6 .

Preferably, the self-collimation theodolite 1 can measure the angle value of the star point, and has an auto-collimation function, can measure the azimuth value of the reference prism 6, and the measurement error of the self-collimation theodolite is not more than 1 ", and the base has adjustable feet screw for leveling.

Further, there is an abutment surface on the reference tooling 3, which can make the reference abutment surface on the back of the optical transmission device 5 be closely attached to the abutment surface of the reference tooling.

Install the test equipment according to Figure 1, the working principle is: place the reference tooling 3 on the adjustable base 2, fix the turning light pipe 4 on the reference tooling 3, make the light entrance align with the autocollimator objective lens, and the light exit Align the reference prism 6, use a level to level the reference tooling table, place the optical transfer device 5 on the tooling table, set up the autocollimation theodolite 1 in front of the optical transfer device 5 and level it, read the optical transfer device at this time The output value S of the misalignment angle of the autocollimator, use the autocollimation theodolite to align the star point image center of the optical transmission equipment, read the azimuth H ₁ , take away the optical transmission equipment 5, and use the autocollimation theodolite 1 to pass the steering light The tube 4 reads the azimuth value H ₂ of the reference prism 6, and calculates the included angle α ₁ of the instrument constant of the optical transmission device according to the formula α ₁ =H ₁ -H ₂ -S+ΔL, where ΔL is a constant indicating the azimuth error of the steering light pipe. directly into the formula calculation.

Claims (5)

1. a kind of optical delivery equipment and instrument constant calibration system, it is characterised in that：Including autocollimation theodolite, adjustable pedestal, Benchmark frock and steering light pipe；

The benchmark frock is installed on adjustable pedestal；The side of the benchmark frock is provided with benchmark prism；

The steering light pipe is vertically arranged to benchmark frock side；The light inlet of light pipe is turned to towards autocollimation theodolite, is turned to The light-emitting window of light pipe is towards benchmark prism.

2. optical delivery equipment and instrument constant calibration system according to claim 1, it is characterised in that：The steering light pipe One roof prism is inside installed；Light is entered by light inlet, by being projected by light-emitting window again after the reflection of roof prism.

3. optical delivery equipment and instrument constant calibration system according to claim 1 and 2, it is characterised in that：The benchmark Prism is right-angle prism.

4. optical delivery equipment and instrument constant calibration system according to claim 3, it is characterised in that：The auto-collimation warp The measurement error of latitude instrument is not more than 1 ".

5. optical delivery equipment and instrument constant calibration system according to claim 4, it is characterised in that：The benchmark frock Top be provided be vertically arranged by face, optical delivery equipment to be calibrated is close to described by face.