CN113155414A

CN113155414A - Combined adjustable target

Info

Publication number: CN113155414A
Application number: CN202110104233.6A
Authority: CN
Inventors: 张振华; 孟凡强; 井世丽; 王少华; 周立媛
Original assignee: Hebei Hanguang Heavy Industry Ltd
Current assignee: Hebei Hanguang Heavy Industry Ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-07-23
Anticipated expiration: 2041-01-26
Also published as: CN113155414B

Abstract

The invention discloses a combined adjustable target. The target is designed into a combined structure formed by combining a plurality of small fan-shaped targets, and the combined structure is adopted, so that the shape of the through groove of each small fan-shaped target is not closed, a numerical control cutting processing technology can be directly adopted, the production cost is low, the production period is short, the processing surface precision and the form and position tolerance can reach micron level, the root can be processed into a right-angle shape, the root imaging boundary of the target through groove is clear, and the imaging high-precision requirement is met. When the local size in the target needs to be modified, only the corresponding small target needs to be replaced.

Description

Combined adjustable target

Technical Field

The invention relates to the technical field of optical instruments, in particular to a combined adjustable target.

Background

The target is mainly applied to the fields of testing, scientific research and the like of optical instruments or optical equipment, provides a simulated target for the tests of optical imaging systems and instruments, is usually a metal sheet with an integrated structure, and is usually manufactured by a chemical etching process or a linear cutting process. According to the imaging precision requirement, the size of a cross-shaped window in a target is required to be modified sometimes in a test or experiment, the target is generally manufactured again at present, the etching process flow of the target is complicated, the production cost is high, the production period is long, the linear cutting process of the target is limited by the precision of cutting equipment, and the high-precision imaging test requirement of an optical instrument cannot be met. Meanwhile, because the outer diameters of the same cutting wire are not equal in axial size, and the cutting wire can also displace due to elastic deformation in the feeding process, zigzag burrs are easily generated at the edge part of the cross window after the cutting wire is processed by adopting a linear cutting process. The diameter of the cutting wire can not reach the micron level due to the limitation of the strength of the cutting wire, so that the width of the cross through groove processed by adopting a linear cutting process can not reach the micron level, and the requirement of high imaging precision can not be met. The cross section of the cutting wire is circular, the root of the through groove is arc-shaped after being processed by adopting a linear cutting process, the through groove cannot be processed into a right-angle shape, and after the root of the through groove is imaged through the target, the arc-shaped imaging boundary is difficult to judge, so that the test error is caused.

In the prior art, a dynamic simulation target system is also adopted, the target system receives a static or dynamic image video signal generated by a computer or a video signal generator by using a liquid crystal imaging system, visible light illumination light with uniform and adjustable brightness is provided by an illumination system, and is collimated and projected out by a collimating optical system to form parallel light to enter tested equipment, so that the tested equipment observes a visible light target and a background image which are equivalent to remote and clear, and thus, the test and the semi-physical simulation test of the tested equipment are realized. However, the dynamic simulation target system generally has complex composition, large volume, complex required matched software and algorithm, high price and millions of prices.

Disclosure of Invention

In view of the above, the invention provides a combined adjustable target, which is designed to be a combined structure formed by combining a plurality of small targets, when the local size in the target needs to be modified, only the corresponding small target needs to be replaced, and meanwhile, because of the combined structure, the shape of each small target is not closed, a numerical control cutting process can be directly adopted, the production cost is low, and the period is short.

The combined adjustable target comprises: the device comprises a switching cylinder, a first target, a second target, a third target, a fourth target and a pressing ring; wherein, the first target, the second target, the third target and the fourth target are fan-shaped targets of 1/4 circles with the same diameter; one side of each of the 4 fan-shaped targets is provided with a rectangular groove by taking the original point as a starting point, and the rectangular groove penetrates through the thickness of the fan-shaped target; 4 fan-shaped targets constitute circular target, are fastened on the adapter by the clamping ring, and 4 rectangular channels cooperate and form "ten" font window.

Preferably, the sizes of the rectangular grooves of the 4 fan-shaped targets can be the same or different; the target window size is changed by replacing the sector target.

Preferably, the target is machined by a numerical control cutting process.

Preferably, the pressing ring is in threaded connection with the adapter cylinder.

Preferably, the first target, the second target, the third target and the fourth target are all sheet-type structures.

Has the advantages that:

(1) the target is designed into a combined structure formed by combining a plurality of small targets, and when the local size in the target needs to be modified, only the corresponding small target needs to be replaced.

(2) Because of adopting the combined structure, the shape of each small target is not closed, the relevant processing surface of the through groove of the cross-shaped window of the target can directly adopt the numerical control cutting processing technology, the production cost is low, the production period is short, the precision and the form and position tolerance of the processing surface can reach the micron order, and the requirement of high precision of imaging is met.

(3) Due to the adoption of a combined structure, the shape of each small fan-shaped target is not closed any more, the relevant processing surface of the through groove of the cross-shaped window of the target can be directly processed by a numerical control cutting processing technology, the root is processed into a right-angle shape, and after the root of the through groove of the target is imaged, the right-angle imaging boundary is clear, so that the imaging high-precision requirement is met.

Drawings

FIG. 1 is a schematic diagram of a combinatorial tunable target of the present invention. FIG. 1 does not show a clamping ring

Fig. 2 is a cross-sectional view of fig. 1.

The device comprises a 1-switching cylinder, a 2-target I, a 3-target II, a 4-target III, a 5-target IV and a 6-pressing ring.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The invention provides a combined adjustable target, as shown in fig. 1 and 2, which comprises an adapter cylinder 1, a first target 2, a second target 3, a third target 4, a fourth target 5 and a pressing ring 6, wherein the adapter cylinder 1 is a transition piece of the target and test equipment, an inner circular surface in the middle of the adapter cylinder 1 is matched and installed with outer circular surfaces of the first target 2, the second target 3, the third target 4 and the fourth target 5, an inner circular surface on one side of the adapter cylinder 1 is a thread, an outer circular surface of the pressing ring 6 is a thread, the first target 2, the second target 3, the third target 4 and the fourth target 5 are installed in the adapter cylinder 1 through the pressing ring 6, the first target 2, the second target 3, the third target 4 and the fourth target 5 are all sheet structures, the first target 2, the second target 3, the third target 4 and the fourth target 5 are all quarter-round small fan-shaped targets, and the sizes of the outer circular surfaces are equal. Grooves penetrating through the thickness of the small fan-shaped targets are formed on one edges of the first target 2, the second target 3, the third target 4 and the fourth target 5 by taking the original point as a starting point; the 4 small fan-shaped targets are combined into a finished circular target, and the 4 grooves form a cross-shaped window.

Wherein, the length dimensions L1, L2, L3 and L4 of the grooves of the first target 2, the second target 3, the third target 4 and the fourth target 5 may be equal or different; the width dimensions L5, L6, L7 and L8 of the grooves of target one 2, target two 3, target three 4 and target four 5 may be equal or different.

And the first target 2, the second target 3, the third target 4 and the fourth target 5 are processed by a numerical control cutting process.

The size of the groove of the cross-shaped window of the circular target is changed by exchanging the small fan-shaped targets with different groove sizes, so that the method can be suitable for tests or experiments with different imaging requirements.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A combination adjustable target, comprising: the device comprises a transfer cylinder (1), a first target (2), a second target (3), a third target (4), a fourth target (5) and a pressing ring (6); wherein, the first target (2), the second target (3), the third target (4) and the fourth target (5) are fan-shaped targets of 1/4 circles with the same diameter; one side of each of the 4 fan-shaped targets is provided with a rectangular groove by taking the original point as a starting point, and the rectangular groove penetrates through the thickness of the fan-shaped target; 4 fan-shaped targets constitute circular target, are fastened on adapter (1) by clamping ring (6), and 4 rectangular channels cooperate and form "ten" font window.

2. The combined adjustable target of claim 1, wherein the size of the rectangular grooves of the 4 fan-shaped targets can be the same or different; the target window size is changed by replacing the sector target.

3. The composite tunable target of claim 1 or 2, wherein the target is machined by a numerically controlled machining process.

4. The combined adjustable target according to claim 1, wherein the pressing ring (6) is screwed with the adapter cylinder (1).

5. The combinatorial tunable target of claim 1, wherein each of the first target (2), the second target (3), the third target (4), and the fourth target (5) is a sheet-like structure.