CN1797564A - Collimating lens and light picker of using the collimating lens - Google Patents
Collimating lens and light picker of using the collimating lens Download PDFInfo
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- CN1797564A CN1797564A CNA2004100933912A CN200410093391A CN1797564A CN 1797564 A CN1797564 A CN 1797564A CN A2004100933912 A CNA2004100933912 A CN A2004100933912A CN 200410093391 A CN200410093391 A CN 200410093391A CN 1797564 A CN1797564 A CN 1797564A
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- lens
- light
- monitoring
- collimation
- beam splitter
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Abstract
The invention provides a collimating lens and an optical pickup using the collimating lens. And the collimating lens comprises: light refracting main lens device; a monitoring lens device arranged around the main lens device and able to partially reflect illuminating light. And the optical pickup comprises: laser diode; collimating lens composed of the main lens device and the monitoring lens device; a monitoring photosensor; an object lens projecting the light passing through the main lens onto a CD; a light beam splitter for splitting reflected light of the CD; a signal photosensor receiving the disperse lights from the light beam splitter. The invention can reduce light losses and benefits lightening of an optical pickup.
Description
(1) technical field
What relate among the present invention is light picker and is applicable to collimation lens on the light picker, refer in particular to and to reduce light loss, can also freely dispose the monitoring optical sensor, with this light picker that helps a kind of collimation lens of light picker lightness and use this collimation lens.
(2) background technology
Light picker is the core part of disk player, by with irradiate light to CD, at the CD identifying recording layer, perhaps utilize the light of CD reflection to play the data that write down on the CD.
Fig. 1 is that existing normal optical pick-up constitutes concept map.
As shown in the figure, existing light picker comprises following parts: the laser diode 10 of irradiates light; The anaclasis that above-mentioned laser diode 10 irradiations are come out is the collimation lens 30 of directional light; With above-mentioned light by collimation lens 30, part gives by, the catoptron 50 that part then reflects; The illumination of above-mentioned catoptron 50 reflections is mapped to object lens 70 on the CD 80; In order to control the output of laser diode 10, respond to the monitoring optical sensor 60 of above-mentioned catoptron 50 by light; Receive CD 80 catoptrical flashlight sensors 40; With the beam splitter 20 of CD 80 reflected light fractionated irradiations in the above-mentioned flashlight sensor 40.
Above-mentioned flashlight sensor 40 is made up of the control sensor that data transducer that reads CD 80 record data and control focus on and follows the tracks of; Above-mentioned beam splitter 20 can be with the irradiates light fractionated irradiation on above-mentioned data transducer and control sensor.
But therefore existing light picker must may cause the loss of CD irradiates light at above-mentioned catoptron 50 by part light for to monitoring optical sensor 60 irradiation light.Will cause the low problem of light utilization ratio like this.In addition,, can't freely dispose it space is set, therefore not be suitable for the lightness of light picker because the position of monitoring optical sensor 60 is more restricted.
(3) summary of the invention
Purpose of the present invention is exactly to provide a kind of and can either reduce light loss in order to solve above-mentioned variety of problems, can also freely dispose and monitor optical sensor, and help the collimation lens of light picker lightness and use the light picker of this collimation lens.
In order to achieve the above object, the collimation lens that provides among the present invention comprises: the main lens device of refract light; Be arranged on described main lens device around, monitoring lens devices that can the reflecting part irradiates light.
In addition, in order to achieve the above object, the light picker of the above-mentioned collimation lens of use of the present invention will comprise following parts: the laser diode of irradiates light; By main lens device and the collimation lens formed of monitoring lens devices; Can respond to the monitoring optical sensor of above-mentioned monitoring lens devices irradiates light; To be mapped to the object lens on the CD by the illumination of above-mentioned main lens device; The beam splitter of cutting apart above-mentioned CD reflection light; Receive the flashlight sensor of above-mentioned beam splitter dispersed light.
Also be provided with catoptron between above-mentioned collimation lens and the above-mentioned object lens here.
In addition, above-mentioned monitoring optical sensor and above-mentioned flashlight sensor adopt a module more effective.
And above-mentioned monitoring lens devices is made up of mirror lens.
On the one hand, above-mentioned monitoring lens devices can adopt raster fashion.
In addition, above-mentioned monitoring lens devices also can adopt holographic mode.
And above-mentioned beam splitter is preferably disposed between above-mentioned laser diode and the collimation lens.
At this moment, above-mentioned monitoring lens devices preferably is arranged on the position of above-mentioned beam splitter by light formation refract light more than ± 1 time.
Effect of the present invention:
As telling about the front, collimation lens of the present invention and use the light picker of this collimation lens to have following various effect.
At first, the present invention is in the light beam of laser diode 10 irradiations, and its irradiates light that shines the monitoring optical sensor has then utilized ± 1 light, does not therefore have the key light loss fully, can improve the light utilization ratio.
In addition, the position of monitoring optical sensor 60, can be by the distortion of beam splitter 20 refraction patterns, also can carry out corresponding deformation easily, monitoring optical sensor 60 can be arranged in laser diode 10 or flashlight sensor 40 redundant space on every side like this, can improve space utilization.
Also have,, therefore not only can reduce number of fitting parts and built-up time, can also improve the stability of light picker because flashlight sensor 40 and monitoring optical sensor 60 form one.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
(4) description of drawings
Fig. 1 is that existing normal optical pick-up constitutes concept map.
Fig. 2 is the structural map of the present invention the 1st embodiment, is the concept map of light picker equally.
Fig. 3 is the structural map of the present invention the 2nd embodiment, is the concept map of light picker equally.
The symbol description of major part in the accompanying drawing:
10: laser diode 20: beam splitter
40: flashlight sensor 50: catoptron
60: monitoring optical sensor 70: object lens
130: collimation lens 131: the main lens device
132: the monitoring lens devices
(5) embodiment
Below, with reference to accompanying drawing to collimation lens of the present invention and use the embodiment of the light picker of this collimation lens to be elaborated.
Just, in to explanation of the present invention,, putative function and formation no longer are described in detail in order not influence explanation to main idea of the present invention.
In addition, the part identical and suitable with aforementioned formation given identical reference marks, and this is not elaborated.
Fig. 2 is the structural map of the present invention the 1st embodiment, is the concept map of light picker equally.
As shown in the figure, comprise following parts: the laser diode 10 of irradiates light; With the anaclasis of above-mentioned laser diode 10 irradiations is the main lens device 131 of directional light; By being arranged on around the above-mentioned main lens device 131, the collimation lens 130 that monitoring lens devices 132 that can the reflecting part irradiates light is formed; Reflect above-mentioned collimation lens 130 by reflection of light mirror 50; Above-mentioned catoptron 50 reflected light are shone object lens 70 on the CD 80; In order to control the output of laser diode 10, respond to the monitoring optical sensor 60 of above-mentioned monitoring lens devices 132 by light; Receive CD 80 catoptrical flashlight sensors 40; With the beam splitter 20 of CD 80 reflected light fractionated irradiations to the above-mentioned flashlight sensor 40.
Above-mentioned monitoring lens devices 132 is arranged on the flange portion of main lens device 131
Above-mentioned monitoring lens devices 132 can adopt modes such as mirror lens, grating (GRATING) or holography.
Above-mentioned flashlight sensor 40 is made up of the control sensor that data transducer that reads CD 80 record data and control focus on and follows the tracks of.
Above-mentioned beam splitter 20 can adopt holographic pattern equally; Be refracted on the above-mentioned monitoring sensor 60 by above-mentioned monitoring lens devices 132 beam reflected, the light by main lens device 131 irradiation then fractionated irradiation on above-mentioned data transducer and control sensor.In addition, above-mentioned monitoring lens devices 132 is positioned on the position of laser diode 10 irradiates lights by ± 1 refract light of beam splitter 20 formation.
Principle of work to the present invention the 1st embodiment describes below.
The light beam of laser diode 10 irradiations shines in the collimation lens 130 by beam splitter 20.At this moment, in the light beam by beam splitter 20, key light shines in the collimation lens 130, and ± 1 time refract light then shines in the monitoring lens devices 132.Shine the light in the monitoring lens devices 132, by beam splitter 20, shine again and detect in the optical sensor 60 through reflection.By responding to the irradiates light intensity on the above-mentioned monitoring optical sensor 60, the intensity of control laser diode 10.
On the one hand, shine in the light beam in the above-mentioned collimation lens 130, shine the light in the main lens device 131, be converted to directional light, and then shine in the object lens 70, finally shine CD 80 surfaces by catoptron 50 by main lens device 131.
Then, the light of launching on CD shines in the beam splitter 20 by object lens 70, catoptron 50, main lens device 131 successively; And shine light in the beam splitter 20 through superrefraction, and shine again in the data light sensor and control optical sensor of flashlight sensor 40, carry out broadcast and the focusing and the tracking Control of data with this.
As noted earlier, the present invention the 1st embodiment is in the light beam that shines laser diode 10, and its light beam that shines the monitoring optical sensor then utilizes ± 1 light, has therefore solved the problem of key light loss fully, and the light utilization ratio can be provided.
In addition, corresponding deformation can also can be carried out easily by the distortion of light optical splitter 20 refraction patterns in the position of monitoring optical sensor 60; Can be arranged on like this in laser diode 10 or flashlight sensor 40 redundant space on every side, can improve space utilization.
Fig. 3 is the structural map of the present invention the 2nd embodiment, equally also is the concept map of light picker.
The light picker of the 2nd embodiment adopts monitoring optical sensor 60 and flashlight sensor 40 to form the structure of an optical sensor module 240.For this reason, the above-mentioned beam splitter 220 that the reflected light of above-mentioned monitoring lens devices 132 can be refracted in the optical sensor module 240 is set.
In addition structure is identical with the 1st embodiment.
As noted earlier, the light picker of the 2nd embodiment is integrated by flashlight sensor 40 and monitoring light 60 and is formed; Number of fitting parts and built-up time can be reduced like this, the stability of light picker can also be improved.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (13)
1, a kind of collimation lens is characterized in that comprising:
The main lens device of refract light;
Be arranged on described main lens device around, monitoring lens devices that can the reflecting part irradiates light.
2, collimation lens as claimed in claim 1 is characterized in that also comprising:
Described monitoring lens devices is arranged on the flange portion of described main lens device.
3, as claim 1 or 2 described collimation lenses, it is characterized in that:
Described monitoring lens devices is made up of mirror lens.
4, as claim 1 or 2 described collimation lenses, it is characterized in that:
Described monitoring lens devices adopts optical grating construction.
5, as claim 1 or 2 described collimation lenses, it is characterized in that:
Described monitoring lens devices adopts holographic structure.
6, a kind of light picker that uses collimation lens as claimed in claim 1 is characterized in that:
The laser diode of irradiates light;
By main lens device and the collimation lens formed of monitoring lens devices;
Can respond to the monitoring optical sensor of described monitoring lens devices irradiates light;
To be mapped to the object lens on the CD by the illumination of described main lens device;
The beam splitter of cutting apart described CD reflection light;
Receive the flashlight sensor of described beam splitter dispersed light.
7, optical take-up apparatus as claimed in claim 6 is characterized in that:
Also be provided with catoptron between described collimation lens and the described object lens.
8, optical take-up apparatus as claimed in claim 6 is characterized in that:
Described monitoring optical sensor and described flashlight sensor form a module.
9, the optical take-up apparatus described in claim 6 or 7 or 8 is characterized in that:
Described monitoring lens devices is made up of mirror lens.
10, as claim 6 or 7 or 8 described optical take-up apparatus, it is characterized in that:
Described monitoring lens devices adopts optical grating construction.
11, as claim 6 or 7 or any described optical take-up apparatus in 8, it is characterized in that:
Described detection lens devices adopts holographic structure.
12, optical take-up apparatus as claimed in claim 6 is characterized in that:
Described beam splitter is arranged between described laser diode and the collimation lens.
13, optical take-up apparatus as claimed in claim 12 is characterized in that:
Described monitoring lens devices is arranged in described beam splitter and forms on the position of refract light more than ± 1 time by light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100933912A CN100377228C (en) | 2004-12-22 | 2004-12-22 | Collimating lens and light picker of using the collimating lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100933912A CN100377228C (en) | 2004-12-22 | 2004-12-22 | Collimating lens and light picker of using the collimating lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1797564A true CN1797564A (en) | 2006-07-05 |
| CN100377228C CN100377228C (en) | 2008-03-26 |
Family
ID=36818534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100933912A Expired - Fee Related CN100377228C (en) | 2004-12-22 | 2004-12-22 | Collimating lens and light picker of using the collimating lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100377228C (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5182444A (en) * | 1989-06-12 | 1993-01-26 | Digital Equipment Corporation | Split lens displaced long from each other along plane of cut |
| US6327238B1 (en) * | 1997-08-29 | 2001-12-04 | Matsushita Electric Industrial Co., Ltd. | Optical disk device |
| KR100461300B1 (en) * | 2002-10-21 | 2004-12-16 | 삼성전자주식회사 | Collimating lens and optical scanning apparatus using the same |
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2004
- 2004-12-22 CN CNB2004100933912A patent/CN100377228C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN100377228C (en) | 2008-03-26 |
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Granted publication date: 20080326 Termination date: 20100122 |