CN2852318Y - Optical pick-up head apparatus for DVD optical disk capable of read-write - Google Patents
Optical pick-up head apparatus for DVD optical disk capable of read-write Download PDFInfo
- Publication number
- CN2852318Y CN2852318Y CNU2005201237970U CN200520123797U CN2852318Y CN 2852318 Y CN2852318 Y CN 2852318Y CN U2005201237970 U CNU2005201237970 U CN U2005201237970U CN 200520123797 U CN200520123797 U CN 200520123797U CN 2852318 Y CN2852318 Y CN 2852318Y
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- ruddiness
- semi
- light
- infrared
- semiconductor laser
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Abstract
The utility model relates to an optical pickup head apparatus for a DVD optical disk which can read and write. The utility model mainly solves the problem of the read and writing of an optical pickup head of a DVD carving and recording machine. A red light semi-transmission semi-reflection beam splitter mirror, a red light reflection infrared light transmission mirror, an infrared light semi-transmission semi-reflection beam splitter mirror, a reflecting mirror and an aiming mirror are fixed in a base. An objective lens and a quarter red light wave sheet are fixed on a driver. A red light grating and a red light semiconductor laser with large power are fixed together. An infrared light grating and an infrared light semiconductor laser are fixed together. The red light semiconductor laser with the large power, the infrared light semiconductor laser, a red light detector, an infrared light detector and a front detector are respectively welded on a flexible printed circuit board, and are installed in the base. Laser light sent by the red light semiconductor laser with the large power is detected by the front detector, the control to lighting power is carried out, thereby, the purpose of reading and writing the DVD optical disc is realized. Infrared light is used for playing a CD class optical disc. The utility model has simple structure and stable performance.
Description
Technical field
The utility model relates to the CD read and write technology in the optical storage system, particularly a kind of optical pick-up device that is applicable to the writable disc of DVD.
Background technology
Along with the development of optical storage technology, the DVD series of products have entered market in large quantities, because the DVD CD has the advantage that capacity is big, sharpness is high, DVD player is by the consumer acceptance.Simultaneously, along with people are more and more stronger to the demand of high capacity storage, after the CD that can burn a CD is accepted extensively by people, but imprinting DVD CD becomes a new focus; Correspondingly, DVD burner also becomes focus.But, because the existence jointly over a period to come of the extensive existence of CD class CD and DVD class CD and CD class CD, so DVD burner needs to read CD class CD and DVD class CD.Therefore the laser of DVD burner should comprise and be used to read the infrared light of CD class CD and the ruddiness that is used to read and write DVD class CD.
DVD burner must can reading and writing the DVD CD, and laser power difference during the reading and writing CD, this requirement control effectively to the red light semiconductor laser luminous power.
From in appearance, the DVD burner slimming is a development trend.DVD burner will reduce thickness, require the movement of DVD burner to reduce thickness, and this requires optical pickup to reduce thickness.
The optical pickup scheme of DVD burner in the market is many, but they have all adopted many resolution elements, and component number is many, assembling adjusting process complexity.
The utility model content
The technical scheme that the utility model proposes mainly solves the problem of the optical pickup reading and writing of DVD burner, realizing that DVD burner is read, the purpose of writing information, and adopts integratedly, makes simple in structurely, and the assembling adjusting process is easy.
The optical pick-up device of the utility model design, which comprises at least a high-power red light semiconductor laser, an infrared light semiconductor laser, the ruddiness grating, the infrared light grating, the semi-transparent semi-reflecting spectroscope of ruddiness, reflection to red light infrared transmission mirror, the semi-transparent semi-reflecting spectroscope of infrared light, catoptron, gun sight, ruddiness quarter-wave plate, object lens, driver, concavees lens, ruddiness detector, infrared detector, preceding detector and pedestal are formed, and it is characterized in that described high-power red light semiconductor laser sends red laser, by the ruddiness grating, after reflection on the semi-transparent semi-reflecting spectroscope of ruddiness, by catoptron, optical axis is become vertical direction, inject gun sight, by the ruddiness quarter-wave plate, converge on the Information Level of CD the object lens from this light path of light process that CD reflection is returned, ruddiness quarter-wave plate through object lens by driver control, gun sight, behind the catoptron,, on reflection to red light infrared transmission mirror, reflect by the semi-transparent semi-reflecting spectroscope of ruddiness, by concavees lens, be mapped on the ruddiness detector; Send laser from high-power red light semiconductor laser, be mapped on the preceding detector by the semi-transparent semi-reflecting spectroscope of ruddiness; Send infrared laser from the infrared light semiconductor laser, by the infrared light grating, through the semi-transparent semi-reflecting spectroscope of infrared light, by catoptron, by reflection to red light infrared transmission mirror, by the semi-transparent semi-reflecting spectroscope of ruddiness, by catoptron, optical axis is become vertical direction, inject gun sight, by the ruddiness quarter-wave plate, converge on the Information Level of CD the object lens from this light path of light process that CD reflection is returned, ruddiness quarter-wave plate through object lens by driver control, gun sight, catoptron, the semi-transparent semi-reflecting spectroscope of ruddiness, reflection to red light infrared transmission mirror, after reflection on the semi-transparent semi-reflecting spectroscope of infrared light, be mapped on the infrared detector.
The laser that the high-power red light semiconductor laser of the utility model sends is the laser of elliptic polarization, the ratio of the component of this laser on two polarization directions is between 1: 0.00001 to 1: 100000, this laser power from 0.1mW to 200mW between, the light that sends from high-power red light semiconductor laser and the angle of surface level are from 0 ° to 45 °; High-power red light semiconductor laser is luminous when reading and writing DVD class CD, and high-power red light semiconductor laser is not luminous when reading CD class CD.
The ratio of the power of positive 1 grade of light of the utility model ruddiness grating, negative 1 grade of light is between 1: 0.1 to 1: 10, and the ratio of the power of 0 grade of light and positive 1 grade of light is between 1000: 1 to 1: 1.
The semi-transparent semi-reflecting spectroscope of the utility model ruddiness is between 0.001: 1 to 1: 1000 to the transmitted optical power of ruddiness and the ratio of reflected optical power; The semi-transparent semi-reflecting spectroscope of ruddiness to the transmissivity of infrared light between 30% to 100%; Reflection to red light infrared light projecting mirror is between 30% to 100% to the reflectivity of ruddiness, to the transmissivity of infrared light between 30% to 100%; The semi-transparent semi-reflecting spectroscope of infrared light is between 1: 100 to 1: 0.01 to the transmitted light of infrared light and the ratio of catoptrical power.
The center line of the red laser that the center line of the infrared laser that the utility model infrared light semiconductor laser sends and high-power red light semiconductor laser send is in same plane, and the angle between these two center lines is between negative 165 ° to positive 165 °.
The laser that the high-power red light semiconductor laser of detector monitors sends before the utility model is through the semi-transparent semi-reflecting spectroscopical transmitted light of ruddiness.
But the optical pick-up device of the utility model reading and writing DVD CD, the light that its light source sends is infrared light and ruddiness.Infrared light is used to read the signal of CD class CD, and ruddiness is used for the signal of reading and writing DVD class CD.
Catoptron is between gun sight and the semi-transparent semi-reflecting spectroscope of ruddiness in the utility model, catoptron makes optical axis become vertical direction, infrared detector, ruddiness detector are positioned at the space with high-power red laser equal height, perhaps in the space between the height of the height of high-power red laser and CD, can make full use of the lateral part in the space like this, effectively reduce the thickness of optical pickup.The utility model is surveyed the laser that high-power red light semiconductor laser sends by preceding detector, and feeds back to the control of control circuit realization to luminous power, thus the reading and writing of the information of realization.
The size that the utility model fully takes into account the optical disc information track is very little, therefore needs the assurance luminous point to follow the tracks of on information track all the time.The utility model is realized the correct tracking of luminous point by a driver and servo-drive system, driver is by the resiliency supported lead, objective carrier, coil, magnet is formed, and its object lens are installed on the objective carrier, are wound with track coil and focusing coil on objective carrier, control the motion of object lens by the electric current in these the two kinds of coils in the magnetic field of controlling magnet generation, thereby realize focusing on and tracking.
The utility model is simplified the structure of optical pickup by adopting high-power red light semiconductor laser and infrared light semiconductor laser, catoptron is placed between gun sight and the semi-transparent semi-reflecting spectroscope of ruddiness, with the ruddiness detector, infrared detector is positioned in the horizontal space, make full use of the lateral part in the space, effectively reduced the thickness of optical pickup, by to high-power red light semiconductor laser, the infrared light semiconductor laser, the ruddiness detector, the setting of the position of infrared detector, thereby simplification production process, enhance product performance, prolong life of product.
Description of drawings
Fig. 1 is the utility model schematic diagram,
The high-power red light semiconductor laser of 1-among Fig. 1,2-ruddiness grating, the semi-transparent semi-reflecting spectroscope of 3-ruddiness, the 4-catoptron, 5-gun sight, 6-ruddiness quarter-wave plate, the 7-object lens, 8-CD, 9-reflection to red light infrared transmission mirror, the 10-concavees lens, 11-ruddiness detector, 12-infrared light semiconductor laser, 13-infrared light grating, the semi-transparent semi-reflecting spectroscope of 14-infrared light, detector before the 15-infrared detector, 16-.
Embodiment
The utility model is when implementing, should be with the semi-transparent semi-reflecting spectroscope of ruddiness, reflection to red light infrared transmission mirror, the semi-transparent semi-reflecting spectroscope of infrared light, catoptron, gun sight is fixed in the pedestal, with object lens, the ruddiness quarter-wave plate is fixed on the driver, ruddiness grating and high-power red light semiconductor laser are fixed together, infrared light grating and infrared light semiconductor laser are fixed together, with high-power red light semiconductor laser, the infrared light semiconductor laser, the ruddiness detector, infrared detector, preceding detector is welded on the flexible printed circuit board respectively and is installed in the pedestal, adjust the inclination angle of driver, the ruddiness position of detector, the position of infrared detector, the position of high-power red light semiconductor laser, the position of infrared light semiconductor laser is adjusted the back point glue that finishes and is fixed.
Below in conjunction with Fig. 1 the utility model is described further: the semi-transparent semi-reflecting spectroscope 14 of infrared light, reflection to red light infrared transmission mirror 9, the semi-transparent semi-reflecting spectroscope 3 of ruddiness, catoptron 4 are fixed in the pedestal successively, object lens 7, ruddiness quarter-wave plate 6 are fixed on the driver, ruddiness grating 2 and high-power red light semiconductor laser 1 are fixed together, and are arranged at the semi-transparent semi-reflecting spectroscope of ruddiness both sides respectively with preceding detector; Infrared light grating 13 and infrared light semiconductor laser 12 are fixed together, are arranged at the semi-transparent semi-reflecting spectroscope of the infrared light outside; Be welded on high-power red light semiconductor laser 1, infrared light semiconductor laser 12, ruddiness detector 11, infrared detector 15, preceding detector 16 on the flexible printed circuit board respectively and be installed in the pedestal, catoptron, gun sight, the ruddiness quarter-wave plate, the center of object lens is point-blank; Reflection to red light infrared transmission mirror one side sets gradually concavees lens, ruddiness detector.During enforcement, adjust the inclination angle of driver, the position of ruddiness detector 11, the position of infrared detector 15, the position 1 of high-power red light semiconductor laser, the position of infrared light semiconductor laser 12, adjust the back point glue that finishes and fix.
High-power red light semiconductor laser sends red laser, by the ruddiness grating, after reflection on the semi-transparent semi-reflecting spectroscope of ruddiness, pass through catoptron, optical axis is become vertical direction, inject gun sight,, converge on the Information Level of CD through object lens by driver control by the ruddiness quarter-wave plate, object lens from this light path of light process that CD reflection is returned, the ruddiness quarter-wave plate, gun sight is behind the catoptron, by the semi-transparent semi-reflecting spectroscope of ruddiness, on reflection to red light infrared transmission mirror, reflect,, be mapped on the ruddiness detector by concavees lens; Send laser from high-power red light semiconductor laser, be mapped on the preceding detector by the semi-transparent semi-reflecting spectroscope of ruddiness; Send infrared laser from the infrared light semiconductor laser, by the infrared light grating, through the semi-transparent semi-reflecting spectroscope of infrared light, by catoptron, by reflection to red light infrared transmission mirror, by the semi-transparent semi-reflecting spectroscope of ruddiness, by catoptron, optical axis is become vertical direction, inject gun sight, by the ruddiness quarter-wave plate, converge on the Information Level of CD the object lens from this light path of light process that CD reflection is returned, ruddiness quarter-wave plate through object lens by driver control, gun sight, catoptron, the semi-transparent semi-reflecting spectroscope of ruddiness, reflection to red light infrared transmission mirror, after reflection on the semi-transparent semi-reflecting spectroscope of infrared light, be mapped on the infrared detector.
Claims (7)
1, a kind of optical pick-up device of read-write DVD CD, which comprises at least a high-power red light semiconductor laser, an infrared light semiconductor laser, the ruddiness grating, the infrared light grating, the semi-transparent semi-reflecting spectroscope of ruddiness, reflection to red light infrared transmission mirror, the semi-transparent semi-reflecting spectroscope of infrared light, catoptron, gun sight, ruddiness quarter-wave plate, object lens, driver, concavees lens, ruddiness detector, infrared detector, preceding detector and pedestal are formed, and it is characterized in that described high-power red light semiconductor laser sends red laser, by the ruddiness grating, after reflection on the semi-transparent semi-reflecting spectroscope of ruddiness, by catoptron, optical axis is become vertical direction, inject gun sight, by the ruddiness quarter-wave plate, converge on the Information Level of CD the object lens from this light path of light process that CD reflection is returned, ruddiness quarter-wave plate through object lens by driver control, gun sight, behind the catoptron,, on reflection to red light infrared transmission mirror, reflect by the semi-transparent semi-reflecting spectroscope of ruddiness, by concavees lens, be mapped on the ruddiness detector; Send laser from high-power red light semiconductor laser, be mapped on the preceding detector by the semi-transparent semi-reflecting spectroscope of ruddiness; Send infrared laser from the infrared light semiconductor laser, by the infrared light grating, through the semi-transparent semi-reflecting spectroscope of infrared light, by catoptron, by reflection to red light infrared transmission mirror, by the semi-transparent semi-reflecting spectroscope of ruddiness, by catoptron, optical axis is become vertical direction, inject gun sight, by the ruddiness quarter-wave plate, converge on the Information Level of CD the object lens from this light path of light process that CD reflection is returned, ruddiness quarter-wave plate through object lens by driver control, gun sight, catoptron, the semi-transparent semi-reflecting spectroscope of ruddiness, reflection to red light infrared transmission mirror, after reflection on the semi-transparent semi-reflecting spectroscope of infrared light, be mapped on the infrared detector.
2, the optical pick-up device of a kind of read-write DVD CD according to claim 1, it is characterized in that the laser that high-power red light semiconductor laser sends is the laser of elliptic polarization, the ratio of the component of this laser on two polarization directions is between 1: 0.00001 to 1: 100000, this laser power from 0.1mW to 200mW between, the light that sends from high-power red light semiconductor laser and the angle of surface level are from 0 ° to 45 °; High-power red light semiconductor laser is luminous when reading and writing DVD class CD, and high-power red light semiconductor laser is not luminous when reading CD class CD.
3, the optical pick-up device of a kind of read-write DVD CD according to claim 1, the ratio that it is characterized in that the power of positive 1 grade of light of ruddiness grating, negative 1 grade of light is between 1: 0.1 to 1: 10, and the ratio of the power of 0 grade of light and positive 1 grade of light is between 1000: 1 to 1: 1.
4, the optical pick-up device of a kind of read-write DVD CD according to claim 1 is characterized in that the semi-transparent semi-reflecting spectroscope of ruddiness is between 0.001: 1 to 1: 1000 to the transmitted optical power of ruddiness and the ratio of reflected optical power; The semi-transparent semi-reflecting spectroscope of ruddiness to the transmissivity of infrared light between 30% to 100%; Reflection to red light infrared light projecting mirror is between 30% to 100% to the reflectivity of ruddiness, to the transmissivity of infrared light between 30% to 100%; The semi-transparent semi-reflecting spectroscope of infrared light is between 1: 100 to 1: 0.01 to the transmitted light of infrared light and the ratio of catoptrical power.
5, the optical pick-up device of a kind of read-write DVD CD according to claim 1, the center line that it is characterized in that the center line of the infrared laser that the infrared light semiconductor laser sends and the red laser that high-power red light semiconductor laser sends is in same plane, and the angle between these two center lines is between negative 165 ° to positive 165 °.
6, the optical pick-up device of a kind of read-write DVD CD according to claim 1, the laser that the high-power red light semiconductor laser of detector monitors sends before it is characterized in that is through the semi-transparent semi-reflecting spectroscopical transmitted light of ruddiness.
7, the optical pick-up device of a kind of read-write DVD CD according to claim 1, it is characterized in that infrared detector, ruddiness detector are positioned at the space with high-power red laser equal height, perhaps in the space between the height of the height of high-power red laser and CD; Infrared light semiconductor laser and infrared detector are worked when play CD class CD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201237970U CN2852318Y (en) | 2005-12-02 | 2005-12-02 | Optical pick-up head apparatus for DVD optical disk capable of read-write |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201237970U CN2852318Y (en) | 2005-12-02 | 2005-12-02 | Optical pick-up head apparatus for DVD optical disk capable of read-write |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2852318Y true CN2852318Y (en) | 2006-12-27 |
Family
ID=37586274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005201237970U Expired - Fee Related CN2852318Y (en) | 2005-12-02 | 2005-12-02 | Optical pick-up head apparatus for DVD optical disk capable of read-write |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2852318Y (en) |
-
2005
- 2005-12-02 CN CNU2005201237970U patent/CN2852318Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |