CN1292275C - 1 X N mechanical light switch - Google Patents
1 X N mechanical light switch Download PDFInfo
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- CN1292275C CN1292275C CN 200410012946 CN200410012946A CN1292275C CN 1292275 C CN1292275 C CN 1292275C CN 200410012946 CN200410012946 CN 200410012946 CN 200410012946 A CN200410012946 A CN 200410012946A CN 1292275 C CN1292275 C CN 1292275C
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- prism
- light beam
- relay
- box body
- box
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Abstract
The present invention discloses a 1*N mechanical light switch which relates to a mechanical light switch. A box body 1 of the present invention is a square box, wherein a light beam input device 7 is arranged on the left of the box; an electric signal I/O port 3 is arranged on the box; N light beam output devices 8 are orderly arranged on the right of the box from top to bottom; a circuit control board 2 is arranged in the box; n relays 4 are orderly arranged on the circuit control board 2 form left to right; each relay 4 is connected with a corresponding square refracting prism 5 thereof through a force arm. The electric signal I/O port 3 is connected with the relays 4 through a control circuit. The geometric size of the prism 5 is one time larger than that of the adjacent prism 5; namely that the geometric size of the latter prism is two times as large as the former prism. A light path of the present invention has few switching elements; the present invention reduces the freedom degree influencing the stability of the light path, reduces the difficulty for debugging the light path, increases a switching response speed, improves the optical stability and decreases the volume; the present invention has high cost performance.
Description
Technical field
The present invention relates to a kind of mechanical optical switch, specifically, relate to a kind of 1 * N mechanical optical switch.This photoswitch can be widely used in the gating and the exchange in optical signal transmission path in optical communication system, optical network system, optical fiber debugging and measuring system and the optical fiber sensing system.
Background technology
In the optical transmission system, information is with form low-loss transmission in optical fiber of light signal, and the single-mode fiber diameter is 9um, and its numerical aperture is little, requires to have very high aligning accuracy during the optical fiber beam coupling.Photoswitch is a kind ofly can change the beam Propagation path, has the very optical element of high stability and precision again, and it can realize the selection in beam Propagation path as requested neatly.
1 * N mechanical optical switch formerly has a variety of implementation methods.With 1 * 8 switch is example, and what commercialization was more at present is to form with 1 * 2 mechanical switch cascade, as Fig. 1, Fig. 2.
Wherein: the schematic diagram of 1 * 2 photoswitch as shown in Figure 1, its structure comprises a light beam input end, two light beam output terminals, a relay, catoptron or prism, several parts such as box body.Its principle of work be light from the incident of light beam input end, relay drives catoptron, the transmission direction of control bundle realizes the switching of light beam between two output terminals.
1 * 8 photoswitch that forms by 1 * 2 photoswitch cascade as shown in Figure 2, it comprises seven 1 * 2 photoswitches shown in Figure 1, circuit control section, a light beam input unit, eight light beam followers, several parts such as electric signal input/output port, box body.The user sends out request signal and makes corresponding 1 * 2 photoswitch switching as required, realizes the switching of light from the input end to the output terminal.
Based on 1 * 8 photoswitch of this mode, implementation is simpler, but exists many deficiencies: loss is big such as inserting, and the response time is long, long-time stability difference etc.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect that prior art exists, a kind of 1 * N mechanical optical switch is provided.
The object of the present invention is achieved like this, comprises light path part, Mechanical Driven part, control circuit part, box body.
1, concrete structure
If n=2,3 ..., N=2
n, in order not increase the volume of switch, the value of n is no more than 6.
The present invention is made up of n prism 5, a n relay 4, light beam input unit 7, a N light beam follower 8, box body 1, circuit board 2, an electric signal I/O mouth 3.
Its outer body is a square box body 1, and there is a light beam input unit 7 on box body 1 left side, and there is electric signal I/O mouth 3 box body 1 top, and box body 1 the right from top to bottom, is aligned in sequence with N light beam follower 8;
The chipware of 1 * N switch is housed in the box body 1, and chipware on the front of circuit board 2, from left to right, alternately is arranged with n relay 4 and n prism 5 based on circuit board 2 successively; Relay 4 is fixed on the circuit board 2 by its electric pin, and prism 5 is bonding or be welded on the arm of force of corresponding relay 4; Electric signal I/O mouth 3 is connected with relay 4 by control circuit;
Control circuit is installed on the circuit board 2, comprises power supply, single-chip microcomputer, coding, decoding scheme, A/D change-over circuit, I/O interface etc., and control circuit is communicated by letter with the outside by signal I/O mouth 3, according to the work of user's request controlling and driving mechanism.
2, principle of work
External signal is issued control circuit by electric signal I/O mouth 3, control circuit is making alive on corresponding relays 4, and the adhesive arm of force drives prism 5 and stretches into or exit optical, by the different operating combinations of states of prism 5, realize switching, the transmission of light between N optical channel.
Being without loss of generality, is that example further specifies with 1 * 8 mechanical optical switch, as shown in Figure 3.
Among Fig. 3, bonding respectively or be welded on the corresponding position of box body 1 after the light beam input and output device is debugged; The core component that changes optical transmission direction differs one times first prism 5.1, second prism the 5.2, the 3rd prism 5.3 successively by 3 identical, adjacent both sizes of material to be formed, and is separately fixed on the arm of force of the 1st relay the 4.1, the 2nd relay the 4.2, the 3rd relay 4.3; Relay 4 is fixed on the circuit board 2 by its electric pin, and circuit board 2 is fixed on the inside of box body 1 by its pilot hole, with lid it is encapsulated at last.
When transmitting forward,, be subjected to the refraction of refracting prisms from the light of light beam input end output, produce a displacement in the space, because the length of side of mound, prism back mirror is the twice of the length of side of mound, front mirror as refracting prisms are arranged in the light path., when light beam passed through different prisms in succession, the displacement that produces in the space also had nothing in common with each other.The combination of N different prisms can realize the switching of light beam between N output terminal.
The present invention has the following advantages and good effect:
1. the quantity of light path switching device is dropped to minimum, thereby reduced the degree of freedom that influences stability of layout, also reduced the difficulty of light path debugging;
2. the minimizing of light path switching device number can improve the response speed of switch, improves optical stability;
3. the parts number of light path switching reduces, and has also reduced the volume of 1 * N mechanical optical switch simultaneously.
In a word, ratio of performance to price height of the present invention has wide application prospect.
Description of drawings
Fig. 1-1 * 2 mechanical optical switch synoptic diagram;
Fig. 2-by 1 * 8 mechanical optical switch synoptic diagram of 1 * 2 mechanical optical switch cascade;
Fig. 3-1 * 8 mechanical optical switch is formed synoptic diagram;
The index path of Fig. 4 a-1 * when three prisms of 8 mechanical optical switches are in exit status entirely;
Fig. 4 b-1 * three prisms of 8 mechanical optical switches are in the index path when stretching into state entirely;
Fig. 4 c-1 * 8 mechanical optical switch light beam followers are changed to twin-core light beam follower rear prism index path when withdrawing from entirely;
Fig. 4 d-1 * 8 mechanical optical switch light beam followers are changed to twin-core light beam follower rear prism index path when stretching into entirely;
Wherein:
The 1-box body;
The 2-circuit board;
3-electric signal I/O mouth, i.e. electric signal input/output port;
The 4-relay, or be electromagnet, or be piezoelectric ceramics, comprise the 1st relay the 4.1, the 2nd relay 4.1 ... n relay 4.n;
The 5-prism is a kind of square refracting prisms, comprises the 1st prism the 5.1, the 2nd prism 5.2 ... n prism 5.n;
6-light beam input end;
7-light beam input unit;
8-light beam follower comprises the 1st light beam follower the 8.1, the 2nd light beam follower 8.2 ... N light beam follower 8.N;
9-light beam output terminal comprises the 1st light beam output terminal the 9.1, the 2nd light beam output terminal 9.2 ... N light beam output terminal 9.N;
The 10-roof prism;
11-twin-core light beam follower.
Embodiment
For convenience of explanation, be example still with 1 * 8 mechanical optical switch.
Fig. 4 comprises Fig. 4 a, Fig. 4 b, Fig. 4 c, Fig. 4 d, is one group of 1 * 8 mechanical optical switch light path synoptic diagram.
From left to right, be followed successively by: 5.3,8 light beam followers of 6,1 light beam input units of 1 light beam input end, 7, the 1 prism 5.1, the 2 prisms, 5.2, the 3 prisms 8.1-8.8,8 light beam output terminal 9.1-9.8.
Light beam input unit 7 can enlarge the beam diameter in the optical fiber, makes this light beam that bigger collimation scope be arranged.Light beam follower 8 is made up of eight single core light beam followers, and these light beam followers 8 make it to have best coupling efficiency according to the apolegamy of light path concrete condition.The core that changes the beam Propagation direction in 1 * 8 mechanical optical switch is identical by 3 materials, size differs one times prism 5 successively and forms.Be coated with anti-reflection film on the right angle face of prism, can reduce the surface reflection loss.
In Fig. 4 a, relay 4 all is in off-position, this moment the 1st prism 5.1, the 2nd prism 5.2, the 3rd prism 5.3 all is in the exit optical state, and flashlight is after 6 outgoing of light beam input end, and the free space in switch is propagated, directly be coupled into light beam output terminal 9.1, promptly light beam input end 6 → light beam output terminal 9.1.
In Fig. 4 b, relay 4 all is in "on" position, at this moment the 1st prism 5.1, the 2nd prism 5.2, the 3 prisms 5.3 stretch in the light path under the driving of the arm of force, and light is after 6 outgoing of light beam input end, at first through the refraction of the 1st prism 5.1, light beam is more directly propagated and is produced a displacement h after the outgoing
1, light beam incides on the 2nd prism 5.2 then, produces a displacement h again through superrefraction
2, final beam is subjected to the refraction of the 3rd prism 5.3, produces a displacement h again
3After three refractions, very big displacement deviation takes place in light beam, is coupled into light beam output terminal 9.9, and promptly light beam input end 6 → light beam output terminal 9.9.
Above-mentioned these several displacement h
1, h
2, h
3Between be to be mutually related, have following relation: h
2=2h
1, h
3=4h
1While h
1, h
2, h
3Be decided by the physical dimension of square prism, the refractive index of material and the incident angle of light beam again, material, the physical dimension of choose reasonable collimating apparatus and prism 5 helps the package dimension that improves switch performance, reduce switch.
Light beam outputs to the situation of other passage, is decided by that 3 prisms 5 stretch into the different situations with exit optical.Be changed to " 1 " as the status code that prism " is stretched into " in the light path, the status code of " withdrawing from " light path is changed to " 0 ", and corresponding relation such as table 1 between the connection of optical channel and the status code of several prisms show.
One of three prisms group of state determines the connection of a certain road light path uniquely as can be known from Table 1.
The table mapping table that 1:1 * the different duty of three prisms of 8 mechanical optical switches is communicated with light path
| The prism state encoding | Light path is connected situation | ||
| 5.3 | 5.2 | 5.1 | |
| 0 | 0 | 0 | 6→9.1 |
| 0 | 0 | 1 | 6→9.2 |
| 0 | 1 | 0 | 6→9.3 |
| 0 | 1 | 1 | 6→9.4 |
| 1 | 0 | 0 | 6→9.5 |
| 1 | 0 | 1 | 6→9.6 |
| 1 | 1 | 0 | 6→9.8 |
| 1 | 1 | 1 | 6→9.9 |
In addition, at light beam output terminal 9, in order to reduce the number of light beam follower 8, also can select the structure of Fig. 4 c, Fig. 4 d, single core light beam follower 8 is changed to twin-core light beam follower 11, adds a roof prism 10 simultaneously before each twin-core follower, this roof prism 10 can be with the light beam of parallel beam deviation for intersecting of incident, the intersection point that should intersect light beam is on the focus of twin-core light beam follower 11 lens, and light beam can be coupled to corresponding output channel again like this.
Can reach ± 0.02dB based on its repeatability of 1 * N switch of the present invention, response speed is less than 10ms, and string winds greater than 50dB, and isolation is greater than 50dB.The quantity n that can increase prism simultaneously according to actual needs can realize 1 * N (N=2
n) mechanical optical switch.
Claims (1)
1, a kind of 1 * N mechanical optical switch comprises control circuit, it is characterized in that:
Its outer body is a square box body (1), and there is a light beam input unit (7) on box body (1) left side, and there is electric signal I/O mouth (3) box body (1) top, and box body (1) the right from top to bottom, is aligned in sequence with N light beam follower (8);
The chipware of 1 * N switch is housed in the box body (1), and chipware on circuit board (2), from left to right, alternately is arranged with n relay (4) and n prism (5) based on circuit board (2) successively; Relay (4) is fixed on the circuit board (2) by its electric pin, and prism (5) is bonding or be welded on the arm of force of corresponding relay (4); Electric signal I/O mouth (3) is connected with relay (4) by control circuit;
Wherein, N=2
n, the n value is chosen according to actual needs, n=2,3,4,5;
Described prism (5) is the light path switching device, and it is a kind of square refracting prisms, comprises the 1st prism (5.1), the 2nd prism (5.2) ... n prism (5.n); Be coated with anti-reflection film on its right angle face; The length of side of back prism is the twice of the length of side of front prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410012946 CN1292275C (en) | 2004-03-30 | 2004-03-30 | 1 X N mechanical light switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410012946 CN1292275C (en) | 2004-03-30 | 2004-03-30 | 1 X N mechanical light switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1564038A CN1564038A (en) | 2005-01-12 |
| CN1292275C true CN1292275C (en) | 2006-12-27 |
Family
ID=34478088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410012946 Expired - Fee Related CN1292275C (en) | 2004-03-30 | 2004-03-30 | 1 X N mechanical light switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1292275C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103285368B (en) * | 2013-07-03 | 2014-11-05 | 魏茂芳 | Chinese medicine composition for treating dysmenorrhea |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798938A (en) * | 2012-08-30 | 2012-11-28 | 桂林市光隆光电科技有限公司 | Modular mechanical optical switch |
| CN116560006A (en) * | 2023-07-10 | 2023-08-08 | 广东电网有限责任公司佛山供电局 | Optical fiber remote automatic switching device, method and equipment |
-
2004
- 2004-03-30 CN CN 200410012946 patent/CN1292275C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103285368B (en) * | 2013-07-03 | 2014-11-05 | 魏茂芳 | Chinese medicine composition for treating dysmenorrhea |
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| Publication number | Publication date |
|---|---|
| CN1564038A (en) | 2005-01-12 |
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Granted publication date: 20061227 Termination date: 20160330 |