CN102383669A

CN102383669A - Holographic optical lock

Info

Publication number: CN102383669A
Application number: CN2011103226260A
Authority: CN
Inventors: 蒋鑫巍; 张永安
Original assignee: Kunming University of Science and Technology
Current assignee: Kunming University of Science and Technology
Priority date: 2011-10-21
Filing date: 2011-10-21
Publication date: 2012-03-21

Abstract

The invention relates to a holographic optical lock which comprises a key part and a lockset part, wherein the key part is made of a transparent substance; a beam splitter is fixed just in front of a laser in the lockset part; the reflection surface of the beam splitter and an incidence light path form an angle of 45 degrees; a beam expanding lens, a pinhole, a lens and a full reflector are fixed on the right side of the beam splitter along a light path; the full reflector and the light path form an angle of 45 degrees; other instruments are all vertical to the light path; another full reflector is fixed below the beam splitter; the beam expanding lens, the pinhole, the lens, a key jack and the beam splitter are respectively fixed on the right side of the reflector along the light path; the lens and a CCD (Charge Coupled Device) camera are successively fixed under the beam splitter; and the CCD camera is optically connected with a computer. Because the key is made of the transparent substance, internal structures are different, and the grain has uniqueness, therefore, the key is difficult to simulate and copy so as to improve the safety performance of the lockset.

Description

A kind of holographic optics lock

Technical field

Patent of the present invention relates to a kind of lockset that utilizes optical identification to unblank, and particularly a kind of holographic optics lock belongs to lock technology field.

Background technology

At present, the social safety problem becomes more and more important, household safety particularly, and unlocking system has been the important defence line in the household safety, unlocking system not only concerns family's property safety, more possibly influence life safety.

Traditional mechanical unlocking system easy crack, even also formed special unlocking technique, make traditional mechanical lock in part robber eye as empty.Particularly, traditional key majority is a zigzag, and when key inserts lockhole, thereby the zigzag key will engage and drive the mechanical door lock of opening in the lock.And the robber is with the key runin of a cover same specification even directly with 2 iron wire simulation key shape unlatching door locks.

Therefore, and the unlocking system of mechanical bond optics occurred,, with key shape shaded portions LASER Light Source, thereby reach the purpose of opening door lock, but the robber can duplicate and imitate key shape equally, and crack door lock as in U.S. Pat 4787223.

Also have in existing patent; Like U.S. Pat 4369418, among the US4593185, reflect a plurality of laser by key; And judge with a plurality of sensors whether these laser are correct; And then judge whether to open lockset, but this system still comes difference each other with the special shape of key, still might be imitated and duplicate.

In addition, more there is U.S. Pat 6055079 to propose to launch the inductor of the laser of specific coding to door lock, opens door lock with this with the laser diode of key.But its coded system is too simple, and this structure diode and sensor be single, so can crack with the method for parallel beam split.

Summary of the invention

Patent of the present invention provides a kind of optics lock with holographic method, and the characteristics of utilizing the breath of taking a message on the key to be difficult to duplicate are clapped into hologram with key, and reproduced back and memory image contrast, thus the switch of control lockset, the safety of raising lockset.

The present invention implements according to following technical scheme: the holographic optics lock comprises lockset part, key part and light identification division; Key is the transparent strip mechanism that has special drawing information; The light identification division comprises laser instrument 1,

lens

5,10,13,

beam expanding lens

3,8,

pin hole

4,9,1:1 beam splitter 2,12, total

reflective mirror

6,7, ccd video camera 14, key hole 11 and computer 15; Laser instrument 1 dead ahead is beam splitter 2 fixedly, and beam splitter 2 reflectings surface become 45 degree with input path.Fixedly beam expanding lens 3, pin hole 4, lens 5 and total reflective mirror 6, total reflective mirror 6 become miter angle with light path in order along light path on beam splitter 2 right sides; Fixing total reflective mirror 7 under the beam splitter 2, adjustment angle make the incident light of total reflective mirror 7 and reverberation light path vertical with reverberation to the right, on the speculum right side along light path fixedly beam expanding lens 8, pin hole 9, lens 10, key hole 11 and spectroscope 12 respectively; The distance that beam expanding lens was clipped to

pin hole

4,9 in 3,8 minutes equates with the focal length of beam expanding lens, and the distance that pin hole was clipped to

lens

5,10 in 4,9 minutes equals the focal length of

lens

5,10; Fixed lens 13 and ccd video camera 14 successively under the spectroscope 12, ccd video camera 14 is connected with computer 15;

Lens

5,10,13,

beam expanding lens

3,8 and key hole 11 are spectroscope 12 under the total reflective mirror 6 all perpendicular to light path, and thing light and reference light get into ccd video camera 14 through spectroscope 12, lens 13.

The distance of other elements can be provided with arbitrarily in the said light path, only needs to guarantee thing light light path and reference light light path equivalent optical path.

Described key part can be by transparent organic glass, and plastics etc. are processed; The specification of lens 13 can be different with

lens

5,10; The fixing fixed form that adopts routine of each optical element.

Operating principle of the present invention is: when at first inserting key hole to key, will carry key information, the light that carries this information will form at the CCD place with reference light interferes, and is gathered by CCD, records in the computer; When key inserts once more, thing light will carry key information, form interference pattern at CCD place and reference light, and interference pattern is reproduced in computer, through mating with original pattern, judge whether the control lockset is opened.

The present invention adopts the holographic optical spectrum discrimination, and the pattern lines information that key carries has uniqueness, key be difficult to imitated with duplicate, have advantages such as safe, reliable operation.

Description of drawings

Fig. 1 is a light identification division principle schematic of the present invention;

Fig. 2 is a key sketch map of the present invention;

Among the figure: the 1-laser instrument; 2,12-1:1 beam splitter; 3,5,8,10,13-lens; 4,9-aperture; 6,7-total reflective mirror; The 11-key hole; The 14-CCD video camera; The 15-computer; 16-key, 17-key handle.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment patent of the present invention is further specified:

As shown in Figure 1, the lockset of this holographic optics lock partly comprises laser instrument 1,

lens

5,10,13,

beam expanding lens

3,8,

pin hole

4,9,1:1 beam splitter 2,12, total

reflective mirror

6,7, ccd video camera 14, key hole 11 and computer 15; Laser instrument 1 dead ahead is beam splitter 2 fixedly, and beam splitter 2 reflectings surface become 45 degree with input path.Beam splitter 2 right sides are along light path fixedly beam expanding lens 3, pin hole 4, lens 5 and total reflective mirror 6 in order, and wherein total reflective mirror becomes 45 degree with light path, and other instruments are all perpendicular to light path; Fixing total reflective mirror 7 under the beam splitter 2; The adjustment angle makes the incident light of total reflective mirror 7 and reverberation light path vertical with reverberation to the right; Along light path fixedly beam expanding lens 8, pin hole 9, lens 10, key hole 11 and spectroscope 12 respectively, the distance that beam expanding lens was clipped to

pin hole

4,9 in 3,8 minutes equates with the focal length of beam expanding lens on the speculum right side; The distance that pin hole was clipped to

lens

5,10 in 4,9 minutes should equal the focal length of

lens

5,10; Fixed lens 13 and ccd video camera 14 successively under the spectroscope 12, ccd video camera 14 is connected with computer 15 light;

Lens

5,10,13,

beam expanding lens

Laser instrument 1 can adopt 5 milliwatt red light semiconductor lasers in the experiment; Beam expanding

lens

3,8 can adopt the beam expanding lens of 5 focal distance f=2mm; The distance that beam expanding lens was clipped to

pin hole

4,9 in 3,8 minutes is 2mm, and

lens

5,10 can adopt focal distance f=10cm, the lens of external diameter mm.The distance that pin hole was clipped to

lens

5,10 in 4,9 minutes is 10cm; Lens 13 specifications are preferably identical with

lens

5,10; CCD adopts DH-HV series (USB2.0).The distance of other instruments can be provided with arbitrarily in the light path, only needs to guarantee thing light light path and reference light light path equivalent optical path.

As shown in Figure 1: the reference light light path with holographic method optics lock comprises: the laser that laser instrument 1 sends arrives beam-expanding

system

3,4 through beam splitter 2 and produces the light beam of dispersing; Produce directional light through lens 5 backs; And pass through total reflective mirror 6 light beam direct projections, and converge on the arrival video camera CCD by lens 13 to beam splitter 12.

Thing light light path with holographic method optics lock comprises: the laser that laser instrument 1 sends through beam splitter 2 with the part illuminated to speculum 7; Produce the light beam of dispersing through beam-expanding

system

8,9; Produce directional light through lens 10 backs; Shine on the key hole 11, light beam converges on the back arrival video camera CCD through beam splitter 12 and by lens 13 then.The reference light light path should have identical light path with thing light light path.

As shown in Figure 2 is the shape of key 16, can process by transparency material, and plastics for example, organic glass etc., key is subsidiary to have handle 17, and can be arranged to different shapes according to light path.

When key inserts key hole, will carry key information, the light that carries this information will form at the CCD place with reference light interferes, and is gathered by CCD, records in the computer.Because the lines of organic glass has uniqueness, so key is difficult to be replicated or crack.When key inserts once more, thing light will carry key information, form interference pattern at CCD place and reference light, and interference pattern is reproduced in computer.If with the pattern coupling that prestores, then computer control lockset is opened.If what insert is not key, will on CCD, form other pictures, after in computer, reproducing, be difficult to be complementary with original picture stored, then lockset can not opened.

The present invention describes through the practical implementation process; Without departing from the present invention; Can also carry out various conversion and be equal to replacement patent of the present invention; Therefore, patent of the present invention is not limited to disclosed practical implementation process, and should comprise the whole embodiments that fall in the Patent right requirement scope of the present invention.

Claims

1. a holographic optics lock comprises lockset part, key part and light identification division, and it is characterized in that: key is the transparent configuration that has special drawing information; The light identification division comprises laser instrument (1), lens (5), (10), (13), beam expanding lens (3), (8); Pin hole (4), (9), 1:1 beam splitter (2), (12), total reflective mirror (6), (7); Ccd video camera (14), key hole (11) and computer (15); Laser instrument (1) dead ahead is beam splitter (2) fixedly, and beam splitter (2) reflecting surface becomes 45 degree with input path; Beam splitter (2) right side is along light path fixedly beam expanding lens (3) pin hole (4) lens (5) and total reflective mirror (6) in order, and total reflective mirror becomes 45 degree with light path, and other instruments are all perpendicular to light path; Fixing total reflective mirror (7) under the beam splitter (2); The adjustment angle makes the incident light of total reflective mirror (7) and reverberation light path vertical with reverberation to the right, on the speculum right side along light path fixedly beam expanding lens (8), pin hole (9), lens (10), key hole (11) and spectroscope (12) respectively; Beam expanding lens (3), (8) divide the distance that is clipped to pin hole (4), (9) to equate with the focal length of beam expanding lens, and pin hole (4), (9) divide the distance that is clipped to lens (5), (10) to equal the focal length of lens (5), (10); Fixed lens (13) and ccd video camera (14) successively under the spectroscope (12), ccd video camera (14) is connected with computer (15); Lens (5), (10), (13); Beam expanding lens (3), (8) and key hole (11) are all perpendicular to light path; Be spectroscope (12) under the total reflective mirror (6), thing light and reference light get into ccd video camera (14) through spectroscope (12), lens (13).