CN101556807B - Light path of CBHD blue light laser head - Google Patents
Light path of CBHD blue light laser head Download PDFInfo
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- CN101556807B CN101556807B CN2008100234723A CN200810023472A CN101556807B CN 101556807 B CN101556807 B CN 101556807B CN 2008100234723 A CN2008100234723 A CN 2008100234723A CN 200810023472 A CN200810023472 A CN 200810023472A CN 101556807 B CN101556807 B CN 101556807B
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Abstract
The invention relates to a light path of a CBHD blue light laser head. Light rays sent by a blue light LD are at an angle of 20 degrees from a horizontal and income into a prism through a grating, theincome light rays are at an angle of 45 degrees from the prism, light rays sent by a red light LD are at an angle of 110 degrees from a horizontal and income into the prism through the grating, the i ncome light rays are at an angle of 45 degrees from the prism, the prism reflects the red light rays and the blue light rays to a 1/4 wave plate, the 1/4 wave plate is at an angle of 20 degrees from ahorizontal plane, the light rays income into a semi-permeable semi-reflecting plate through the 1/4 wave plate, the light rays are at an angle of 70 degrees from the horizontal plane, and one part of the light rays is reflected to an astigmation plate through the semi-permeable semi-reflecting plate and incomes a PDIC through the astigmation plate so as to realize the checkout of CD signals. The invention fills up the blank of the blue light laser head in China, and can realize massive domestic production because the process of a blue light path system is simpler and the manufacture cost is lower.
Description
Technical field
The present invention relates to a kind of technology of blue-ray laser head, be specifically related to a kind of light path system of blue-ray laser head.
Background technology
The new technology that has occurred at present a kind of blue-ray laser head in the world; Be referred to as the blue-ray laser head (being also referred to as the HD-DVD laser head) of high definition player, its with respect to existing red laser head have sharpness high with advantages such as capacity is big, but the design more complicated of the HD-DVD blue-ray laser head light path system of appearance in the world; Manufacture process requirement is very high; Production cost is very high, and therefore, China does not also possess the ability of producing HD-DVD high definition player laser head at present.One of its major reason is exactly that the light path design technique almost of laser head is monopolized by Japan, and the expert on Japan crosses the design of light path and monopolizing the key components and parts of realizing the light path design scheme, and the price of the key components and parts of Japan's monopolization is all very expensive.At HD-DVD laser head (particularly light path system) design field, China does not have the intellecture property of oneself.The HD-DVD laser head should compatible ruddiness (like VCD, DVD) compatible again blue light (like HD-DVD), and therefore, the HD-DVD laser head than the design of the light path system of DVD laser head difficulty more, becomes a blank of present China in the design of light path system.The independent intellectual property right of blue-ray laser head light path system becomes the bottleneck problem of China's blue-ray laser head production domesticization.
Summary of the invention
The present invention is directed to the defective in the existing blue-ray laser head light path system design, designed and developed out a kind of blue-ray laser head light path system of filling up China's domestic blank, this is that a kind of processing technology is simpler, the CBHD blue laser head system that manufacturing cost is lower.
The present invention realizes through following technical scheme:
The CBHD blue-ray laser head includes object lens, and the below of object lens is collimating mirrors; The below of collimating mirror is a catoptron, and the right side of catoptron is semi-transparent semi-reflecting, and light power meter is located at semi-transparent semi-reflecting below; Semi-transparent semi-reflecting top is a quarter wave plate, and the top of quarter wave plate is a prism, and prism top and right side are equipped with grating; The top of prism top grating is provided with ruddiness LD, and the right side of prism right side grating is provided with blue light LD, and semi-transparent semi-reflecting right side is the astigmatism sheet; The right side of astigmatism sheet is PDIC, and the light that described blue light LD sends becomes 20 degree angles to incide prism through prism right side grating with surface level, and the blue light light of incident becomes miter angle with prism; The light that ruddiness LD sends becomes 110 degree angles to incide prism through prism top grating with surface level, the ruddiness light of incident becomes miter angle with prism, and the blue light light that prism will incide prism reflexes to quarter wave plate; The ruddiness light that prism will incide prism is transmitted to quarter wave plate, and quarter wave plate becomes 20 degree angles with surface level, through the blue light light of prism right side optical grating reflection to quarter wave plate; Incide semi-transparent semi-reflecting through quarter wave plate, be transmitted to the ruddiness light of quarter wave plate, incide semi-transparent semi-reflecting through quarter wave plate through prism top grating; All become 70 degree angles through semi-transparent semi-reflecting blue light light with surface level with ruddiness light, blue light light is through semi-transparent semi-reflecting, in semi-transparent semi-reflecting blue light light; Part blue light light reflexes to the astigmatism sheet, reenters through the astigmatism sheet and is mapped to PDIC, realizes detecting of CD signal; Ruddiness light is through semi-transparent semi-reflecting, and in semi-transparent semi-reflecting ruddiness light, a part of ruddiness light reflexes to the astigmatism sheet; Reenter through the astigmatism sheet and to be mapped to PDIC, realize detecting of CD signal; In semi-transparent semi-reflecting blue light light, another part blue light light reflexes to light power meter, and some blue light light has reflexed to catoptron, and catoptron becomes an angle of 90 degrees to reflex to collimating mirror this part blue light light again; In semi-transparent semi-reflecting ruddiness light, another part ruddiness light reflexes to light power meter, and some ruddiness light has reflexed to catoptron, and catoptron becomes an angle of 90 degrees to reflex to collimating mirror this part ruddiness light again.
The CBHD blue-ray laser head, said blue light through grating incide prism light and through prismatic reflection to the angle between the quarter wave plate light be 90 the degree; Saidly become 19-30 degree angle with semi-transparent semi-reflecting normal through semi-transparent semi-reflecting light that reflexes to the astigmatism sheet.
The CBHD blue-ray laser head; The distance of said blue light LD grating to the prism right side is 2～4.2mm, and prism right side grating is 3.3～5.6mm to the distance of prismatic reflection face, and the grating distance is 1.7～4.1mm to ruddiness LD to the prism top; Ruddiness LD is 5.6～8.8mm to the distance of prismatic reflection face; Prism is 3.2～5.6mm to the distance of quarter wave plate, and quarter wave plate is 1.5～4mm to semi-transparent semi-reflecting distance, and semi-transparent semi-reflecting distance to light power meter is 3～4.9mm; The reflecting surface of catoptron is 4.9～7.6mm to the distance of semi-transparent semi-reflecting reflecting surface, and collimating mirror is 4.2～5.5mm to the distance of mirror reflection surface.
CBHD blue-ray laser head, the diameter of said collimating mirror are 5.2～6.5mm.
CBHD blue-ray laser head, the thickness of said astigmatism sheet are 2.1～4.4mm.
The present invention compares with international HD-DVD laser head light path system, and following characteristics are arranged:
1. the present invention under the prerequisite that guarantees whole structure, has reduced the key components and parts of Japan's monopolization of using in the HD-DVD laser head through the adjustment light path; Reduced the laser head cost, well-known, the key components and parts price of Japan's monopolization is all very expensive.
2. simplified light channel structure; Make under the in order to be effective prerequisite of integral body, practiced thrift cost, and simplified the production technology of laser head that simplified the manufacture difficulty of blue-ray laser head, making it can be in the domestic realization volume production of China.
3. owing to reduced the parts in the laser head, the overall performance of blue-ray laser head is more stable.
4. through behind the blue-ray laser head light path system that has had China's independent intellectual property right; To help forming the new industry of the blue-ray laser head of China's independent intellectual property right; Thereby drive China optics, machinery, the electronics relevant, the development of associated materials industry in the blue-ray laser head field.
5. filled up the blank of China, the CBHD blue-ray laser head light path system that China has been had belong to China's independent intellectual property right at blue-ray laser head light path system design field.
Description of drawings
Accompanying drawing is a light channel structure synoptic diagram of the present invention.
Embodiment
The present invention includes object lens 2, object lens 2 are positioned at the below of disc 1, and the below of object lens 2 is collimating mirrors 3; The below of collimating mirror 3 is catoptrons 4, and the right side of catoptron 4 is semi-transparent semi-reflecting 9, and light power meter 10 is located at semi-transparent semi-reflecting 9 below; Semi-transparent semi-reflecting 9 top is a quarter wave plate 8, and the top of quarter wave plate 8 is prisms 7, and prism 7 tops are provided with grating 61; The right side is provided with grating 62, and the grating opposite side is ruddiness LD 5 and blue light LD 13, and semi-transparent semi-reflecting 9 right side is an astigmatism sheet 11; The right side of astigmatism sheet 11 is PDIC 12, and the light that blue light LD 13 sends becomes 20 degree angles to incide prism 7 through grating 62 with surface level, 7 one-tenth miter angles of the light of incident and prism; The light that ruddiness LD 5 sends becomes 110 degree angles to incide prism 7 through grating 61 with surface level, 7 one-tenth miter angles of the light of incident and prism, and prism 7 reflexes to quarter wave plate 8 with ruddiness light and blue light light; Quarter wave plate 8 becomes 20 degree angles with surface level, light incides semi-transparent semi-reflecting 9 through quarter wave plate 8, and light becomes 70 degree angles with surface level; Light reflexes to astigmatism sheet 11 through semi-transparent semi-reflecting 9 part; Reenter through astigmatism sheet 11 and to be mapped to PDIC 12, realize detecting of CD signal, light reflexes to light power meter 10 through semi-transparent semi-reflecting 9 another part; Some light has reflexed to catoptron 4, and catoptron 4 becomes an angle of 90 degrees to reflex to collimating mirror 3 this part light again.Blue light incides the light of prism 7 and reflexes to angle between quarter wave plate 8 light through prism 7 through grating 62 is 90 degree; Become 19-30 degree angle through semi-transparent semi-reflecting 9 light that reflexes to astigmatism sheet 11 with semi-transparent semi-reflecting 9 normal.Blue light LD 13 is 2～4.2mm to the distance that is positioned at grating 62 under it; Grating 62 is 3.3～5.6mm to the distance of prism 7 reflectings surface; Ruddiness LD 5 is 1.7～4.1mm to grating 61 distances that are positioned under it, and ruddiness LD 5 is 5.6～8.8mm to the distance of prism 7 reflectings surface, and prism 7 is 3.2～5.6mm to the distance of quarter wave plate 8; Quarter wave plate 8 is 1.5～4mm to semi-transparent semi-reflecting 9 distance; Semi-transparent semi-reflecting 9 distance to light power meter 10 is 3～4.9mm, and the reflecting surface of catoptron 4 is 4.9～7.6mm to the distance of semi-transparent semi-reflecting 9 reflecting surface, and collimating mirror 3 is 4.2～5.5mm to the distance of catoptron 4 reflectings surface.The diameter of collimating mirror 3 is 5.2～6.5mm.The thickness of astigmatism sheet 11 is 2.1～4.4mm.
Claims (5)
1.CBHD blue-ray laser head includes object lens, the below of object lens is collimating mirrors; The below of collimating mirror is a catoptron, and the right side of catoptron is semi-transparent semi-reflecting, and light power meter is located at semi-transparent semi-reflecting below; Semi-transparent semi-reflecting top is a quarter wave plate, and the top of quarter wave plate is a prism, and prism top and right side are equipped with grating; The top of prism top grating is provided with ruddiness LD, and the right side of prism right side grating is provided with blue light LD, and semi-transparent semi-reflecting right side is the astigmatism sheet; The right side of astigmatism sheet is PDIC, it is characterized in that the light that described blue light LD sends becomes 20 degree angles to incide prism through prism right side grating with surface level, and the blue light light of incident becomes miter angle with prism; The light that ruddiness LD sends becomes 110 degree angles to incide prism through prism top grating with surface level, the ruddiness light of incident becomes miter angle with prism, and the blue light light that prism will incide prism reflexes to quarter wave plate; The ruddiness light that prism will incide prism is transmitted to quarter wave plate, and quarter wave plate becomes 20 degree angles with surface level, through the blue light light of prism right side optical grating reflection to quarter wave plate; Incide semi-transparent semi-reflecting through quarter wave plate, be transmitted to the ruddiness light of quarter wave plate, incide semi-transparent semi-reflecting through quarter wave plate through prism top grating; All become 70 degree angles through semi-transparent semi-reflecting blue light light with surface level with ruddiness light, blue light light is through semi-transparent semi-reflecting, in semi-transparent semi-reflecting blue light light; Part blue light light reflexes to the astigmatism sheet, reenters through the astigmatism sheet and is mapped to PDIC, realizes detecting of CD signal; Ruddiness light is through semi-transparent semi-reflecting, and in semi-transparent semi-reflecting ruddiness light, a part of ruddiness light reflexes to the astigmatism sheet; Reenter through the astigmatism sheet and to be mapped to PDIC, realize detecting of CD signal; In semi-transparent semi-reflecting blue light light, another part blue light light reflexes to light power meter, and some blue light light has reflexed to catoptron, and catoptron becomes an angle of 90 degrees to reflex to collimating mirror this part blue light light again; In semi-transparent semi-reflecting ruddiness light, another part ruddiness light reflexes to light power meter, and some ruddiness light has reflexed to catoptron, and catoptron becomes an angle of 90 degrees to reflex to collimating mirror this part ruddiness light again.
2. CBHD blue-ray laser head according to claim 1, it is characterized in that said blue light through grating incide prism light and through prismatic reflection to the angle between the quarter wave plate light be 90 the degree; Saidly become 19-30 degree angle with semi-transparent semi-reflecting normal through semi-transparent semi-reflecting light that reflexes to the astigmatism sheet.
3. CBHD blue-ray laser head according to claim 1; The distance that it is characterized in that said blue light LD grating to the prism right side is 2～4.2mm; Prism right side grating is 3.3～5.6mm to the distance of prismatic reflection face; The grating distance is 1.7～4.1mm to ruddiness LD to the prism top, and ruddiness LD is 5.6～8.8mm to the distance of prismatic reflection face, and prism is 3.2～5.6mm to the distance of quarter wave plate; Quarter wave plate is 1.5～4mm to semi-transparent semi-reflecting distance; Semi-transparent semi-reflecting distance to light power meter is 3～4.9mm, and the reflecting surface of catoptron is 4.9～7.6mm to the distance of semi-transparent semi-reflecting reflecting surface, and collimating mirror is 4.2～5.5mm to the distance of mirror reflection surface.
4. according to claim 1 or 3 described CBHD blue-ray laser heads, the diameter that it is characterized in that said collimating mirror is 5.2～6.5mm.
5. according to claim 1 or 2 any described CBHD blue-ray laser heads, the thickness that it is characterized in that said astigmatism sheet is 2.1～4.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100234723A CN101556807B (en) | 2008-04-07 | 2008-04-07 | Light path of CBHD blue light laser head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100234723A CN101556807B (en) | 2008-04-07 | 2008-04-07 | Light path of CBHD blue light laser head |
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| Publication Number | Publication Date |
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| CN101556807A CN101556807A (en) | 2009-10-14 |
| CN101556807B true CN101556807B (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100234723A Active CN101556807B (en) | 2008-04-07 | 2008-04-07 | Light path of CBHD blue light laser head |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811940A (en) * | 2005-01-27 | 2006-08-02 | 三星电子株式会社 | Optical pickup apparatus which is compatible with multiple types of media |
| CN101110234A (en) * | 2007-08-23 | 2008-01-23 | 杨南荔 | Light path of blue-ray laser head |
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2008
- 2008-04-07 CN CN2008100234723A patent/CN101556807B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811940A (en) * | 2005-01-27 | 2006-08-02 | 三星电子株式会社 | Optical pickup apparatus which is compatible with multiple types of media |
| CN101110234A (en) * | 2007-08-23 | 2008-01-23 | 杨南荔 | Light path of blue-ray laser head |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-71505A 2005.03.17 |
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| CN101556807A (en) | 2009-10-14 |
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