CN202352336U

CN202352336U - Optical disk reading device

Info

Publication number: CN202352336U
Application number: CN2011205148134U
Authority: CN
Inventors: 鞠怡明
Original assignee: SUZHOU GALAXY ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: SUZHOU GALAXY ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2011-12-12
Filing date: 2011-12-12
Publication date: 2012-07-25
Anticipated expiration: 2021-12-12

Abstract

The utility model discloses an optical disk reading device adopting a camera, which comprises a bracket, a driving motor, a control circuit and a moving arm, wherein the bracket is connected with the driving motor; the optical disk reading device also comprises a microscope camera, a light source and an image processor; the microscope camera is arranged on the moving arm and can move along the moving arm under the control of the control circuit; the image processor is electrically connected with the microscope camera; when an optical disk is arranged on the bracket, the shooting direction of the microscope camera just faces to the reading surface of the optical disk, and the light generated by the light source is evenly irradiated to the reading surface of the optical disk; and the surface of the optical disk is shot by the microscope camera, and information recorded by a channel of the optical disk can be identified by a machine vision technology. The optical disk reading device is suitable for reading all optical disks.

Description

Disc accessing

Technical field

The utility model relates to a kind of disc accessing, especially relates to a kind of disc accessing that adopts camera.

Background technology

The use of laser disc is very general, like DVD, and VCD, CD_ROM, DVD_ROM or the like.Laser disc is the recording of information medium, and corresponding with it CD-ROM device is laser disc information stores and the instrument that reads.CD is placed on the pallet, and pallet has a groove, is convenient to place and fixing CD.A sliding rail is arranged above CD, and the laser and/write head slides in orbit, is used to read not co-orbital information on the CD, and CD rotates in pallet.The work of control circuit control laser head, transfer arm, CD.

Information burning is on CD.Read (most CDs are read-only) of laser disc information leaned on laser head, and laser radiation records on the rough channel of information at optical disc surface.Produce diffuse reflection after the local laser radiation in hole is arranged, do not have the local total reflection in hole.A photosensitive tube is arranged on laser head, be responsible for receiving these reflected light.This has just realized the purpose with cd-rom recording of information.Though it is very universal that CD uses at present, wherein comprised a lot of hi-techs.Will guarantee that such as laser head laser can accurately focus on optical disc surface, but because CD itself can be definitely not smooth, the CD that in the CD course of work, rotates fluctuates up and down.And because disk rotation speed is very fast, its speed that fluctuates up and down is also very fast.This just requires laser head that a mechanism is arranged, and can judge the degree that disc fluctuates up and down, finely tunes the distance of laser head and optical disc surface in real time.Capacity such as present CD is very big again, can hold more than the 10GB information in the CD.And these information all are with the information track of spiral record, and the distance between the information track is in the micron number magnitude, and this precision that just requires laser head track driving laser head to slide above that also will be in the micron number magnitude.This is extremely accurate machinery.

Although China has produced CD players such as DVD player, DVD_ROM in a large number, the laser head technology is still grasped in Japanese staff, and China is assembling just, does not grasp core technology.

It is that CN1755828A, title are the patent documentations of CD-ROM drive that State Intellectual Property Office of middle Chinese republic discloses publication number on April 5th, 2006, and the scheme of describing in the literary composition comprises: a casing has a bleeder vent; One optical read head is arranged at the inside of casing, is used to read the data on the disc; One circuit board is arranged at the bottom surface of casing, and circuit board has one drive circuit, as for a zone of circuit board; One separating part is arranged at the driving circuit part of proximate circuitry plate, is used to separate driving circuit and optical read head, and separating part has a cavity, is communicated with bleeder vent.Optical read head in this scheme still is traditional laser class read head, does not have substantial change.Laser read head once can only read a channel on the CD, is subject to the rotating speed of CD, and the CD-ROM drive reading speed is difficult to that bigger lifting is arranged.

Summary of the invention

The utility model mainly is to solve the technical matters that the existing in prior technology laser read head once can only read a channel, and a kind of novel disc accessing that can read many channels simultaneously is provided.

The utility model mainly is able to solve through following technical proposals to above-mentioned technical matters: a kind of disc accessing; Comprise carriage, CD-ROM drive motor, control circuit and transfer arm; Said carriage is connected with CD-ROM drive motor; Also comprise microscope image pick-up head, light source and image processor, said microscope image pick-up head is arranged on the transfer arm and can controls the lower edge transfer arm at control circuit and moves, and said image processor is electrically connected with said microscope image pick-up head; When CD was placed on the carriage, the shooting direction of microscope image pick-up head was over against optical disk reading face, and said light source produces the light uniform irradiation to optical disk reading face.

As preferably, the microscope image pick-up head is for can read the high-speed camera head of a plurality of channel informations simultaneously, and a plurality of channel informations that will read through image processor are stitched together, and makes to read dish speed and reach the conventional optical disc machine that is multiple times than.

As preferably, the microscope image pick-up head that said microscope image pick-up head is an adjustable focal length, the speed of focusing can keep focus can remain in the camera lens visual field getting final product, and need not resemble must focus on optical disc surface exactly the laser and/write head.

As preferably, said light source is the LED light emitting diode, and itself and optical disk reading face have certain pitch angle, is convenient to highlight the concavo-convex image of disc channel.

As preferably, said microscope image pick-up head is fixed on the transportable transfer arm, and the precision that the microscope image pick-up head moves is the above width of 10 channels, and this requirement is far below the precision of laser and/write head

The focus of microscope image pick-up head gets final product in the visual field of camera, not necessarily will be exactly on the camera median line.

The utility model adopts a microscope image pick-up head as the information extraction instrument.Its pickup light panel surface is then through adopting the information of machine vision technique identification CD channel record.From finding out here, this programme has got around this difficult problem of laser technology, realizes reading of laser disc recorded information with other a kind of method.This programme is being handled the accurate advantage that oneself is arranged on problem and the information read head focus issues that moves of slide rail:

The first, because the viewfinder range of camera than broad, not only only comprises a track, in the viewfinder range of camera a plurality of tracks can appear simultaneously.So just make that the precision of slide rail need be inaccurate as laser mode, thereby reduced dependence precision optical machinery.

The second, as shown in Figure 2, because the visual field of camera is than broad, needn't be very strict to the requirement that focuses on, as showing among the figure, it is unpunctual to focus in vertical direction, and focusing aside just possibly be accurately.This makes in the camera visual field, to have and focuses on part accurately.Utilize this part just sense data clearly.The fluctuation up and down of laser disc causes the inaccurate problem of focus point to come the position of selective focus point to solve through software, thereby accurate mechanical problem has been transformed into software issue.This has just reduced will be with the closely requirement of servo-actuated of disc to read head.

The 3rd, because camera can read a plurality of channels simultaneously, so adopt camera to do the information that reads that read head can be realized multiple velocity.

Description of drawings

Fig. 1 is a kind of inner structure synoptic diagram of the utility model;

Fig. 2 is a kind of focal length synoptic diagram of the utility model;

Among the figure: 1, transfer arm, 2, the microscope image pick-up head, 3, CD, 4, carriage.

Embodiment

Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technical scheme of the utility model.

Embodiment: a kind of disc accessing of present embodiment; Comprise carriage 4, CD-ROM drive motor, control circuit and transfer arm 1; Carriage is connected with CD-ROM drive motor, also comprises microscope image pick-up head 2, light source and image processor, and inner structure is as shown in Figure 1; The microscope image pick-up head is arranged on the transfer arm and can controls the lower edge transfer arm at control circuit and moves, and image processor is electrically connected with the microscope image pick-up head; When CD 3 was placed on the carriage, the shooting direction of microscope image pick-up head was over against optical disk reading face, and the light uniform irradiation of light source is to optical disk reading face.The microscope image pick-up head is the high magnified glass head of adjustable focal length, and light source is the LED light emitting diode.Light source and optical disk reading face have certain pitch angle.The microscope image pick-up head is fixed on the transportable transfer arm, and the precision that the microscope image pick-up head moves is the above width of 10 channels.

The microscope image pick-up head is delivered to image processor with CD channel photographic images, and image processor reads out the data of storing on the CD through handling.Because the microscope image pick-up head can read many channels simultaneously; And a plurality of channel informations are stitched together through image processor; So same CD speed can have many times reading speed down, perhaps only need just can reach or surpass the reading speed of laser CD-ROM drive much smaller than the rotating speed of laser CD-ROM drive.The microscope image pick-up head is the high-speed camera head, possesses the above shooting speed of per second 10000 frames.

Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.

Although this paper has used terms such as microscope image pick-up head, transfer arm morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain the essence of the utility model more easily; It all is contrary with the utility model spirit being construed to any additional restriction to them.

Claims

1. disc accessing; Comprise carriage, CD-ROM drive motor, control circuit and transfer arm; Said carriage is connected with CD-ROM drive motor, it is characterized in that, also comprises microscope image pick-up head, light source and image processor; Said microscope image pick-up head is arranged on the transfer arm and can controls the lower edge transfer arm at control circuit and moves, and said image processor is electrically connected with said microscope image pick-up head; When CD was placed on the carriage, the shooting direction of microscope image pick-up head was over against optical disk reading face, and said light source produces the light uniform irradiation to optical disk reading face.

2. disc accessing according to claim 1 is characterized in that, said microscope image pick-up head is for can read the high-speed camera head of a plurality of channel informations simultaneously.

3. disc accessing according to claim 1 and 2 is characterized in that, the microscope image pick-up head that said microscope image pick-up head is an adjustable focal length.

4. disc accessing according to claim 1 and 2 is characterized in that, said light source is the LED light emitting diode, and has certain pitch angle with optical disk reading face.

5. disc accessing according to claim 1 is characterized in that, said microscope image pick-up head is fixed on the transportable transfer arm, and the precision that the microscope image pick-up head moves is the above width of 10 channels.