CN1155666A - Integrated optical pickup system - Google Patents
Integrated optical pickup system Download PDFInfo
- Publication number
- CN1155666A CN1155666A CN 96120857 CN96120857A CN1155666A CN 1155666 A CN1155666 A CN 1155666A CN 96120857 CN96120857 CN 96120857 CN 96120857 A CN96120857 A CN 96120857A CN 1155666 A CN1155666 A CN 1155666A
- Authority
- CN
- China
- Prior art keywords
- optical pickup
- pickup system
- integrated
- glass substrate
- integrated optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
An integrated optical pickup system for reproducing an information signal stored on a recording surface of an optical disk is comprised of a first optical glass substrate, integrated with a semiconductor laser, a reflection collimating lens, a transmission off axis diffractive object lens and a reflection layer, for impinging a converged light beam onto the optical disk and collimating the converged light beam after being reflected from the recording surface , and a second glass substrate, integrated therein with a twin focusing beam splitter and a photo detector, for guiding the collimated light beam from the first glass substrate to the photo detector, thereby allowing the integrated optical pickup system to reproduce the information signal off the recording surface of the optical disk.
Description
The present invention relates to a kind of optic pick-up system; And more specifically, relating to a kind of integrated optical pickup system, its size is reduced by its various opticses are integrated on a pair of glass substrate.
As everyone knows, optic pick-up is one of most important parts in the optical disc storage system; And it has been introduced into and has been employed all kinds.Yet regrettably, the optic pick-up of prior art has the discreet component that needs a plurality of heavinesses, makes the very complicated and expensive deficiency of its assembling and calibration.Thereby, design a kind of its optics that makes and be integrated in an optic pick-up system on the glass substrate.
A kind of integrated optical pickup system 100 of prior art has been shown among Fig. 1, it can an information storage area from CD 170 information signal of regeneration, this system be described in Shiono and Ogawa's " Planar-optic-disk pickup withdiffractive micro optics ", AppliedOptics/ volume 33, the 31st phase, on November 1st, 1994.This integrated optical pickup system 100 comprises: a glass substrate 110, a laser diode 120 is used to produce a light beam, reflection feedback lens 130, a reflection collimation lens 140, a reflection double focusing beam splitter 150, a transmission is from axle diffraction object lens 160, one first and one second reflectance coating 180,182 and detecting devices 190 with two pairs of photovoltaic elements, wherein the collimated light beam that this transmission is designed to the plane wave that it will propagate with oblique angle θ from axle diffraction object lens 160 is transformed into the light with a branch of spherical wave of assembling perpendicular to an optical axis of this glass substrate 110.
In this integrated optical pickup system 100, the plane wave light beam of being launched by laser diode 120 is at first reflected by these reflection feedback lens 130, is reflexed on this reflection collimation lens 140 by this first reflectance coating 180 then.This reflection collimation lens 140 is used to make from the beam collimation of reflection feedback lens 130 and with this collimated light beam and reflexes to transmission from axle diffraction object lens 160 through this first reflectance coating 180 and this reflection double focusing beam splitter 150.Focus on CD 170 from this transmission from the collimated light beam of axle diffraction object lens 160 transmissions.
Pass transmission by the focused beam of CD 170 reflection and be incident upon reflection double focusing beam splitter 150 from axle diffraction object lens 160 and through first reflectance coating 180, wherein transmission plays a collimation lens from axle diffraction object lens 160.When passing light beam that transmission arrives reflection double focusing beam splitters 150 from axle diffraction object lens 160 double focusing beam splitter 150 reflex times that are reflected, this light beam is reflected into the pair of separated light beam, and wherein each separating light beam is through the different focus of second reflectance coating, 182 reflection post-concentrations on detecting device 190.The photovoltaic element of detecting device 190 is respectively placed on the focus of this divided beams, makes this integrated optical pickup system 100 read down information signal from the record surface of this CD 170 thus.
A major defect of above-mentioned optic pick-up system 100 is its sizes, reflection feedback lens 130 by optics-be positioned at glass substrate 110 upper ends, second reflectance coating 182, reflection collimation lens 140, reflection double focusing beam splitter 150 and transmission are from integrated the causing of axle diffraction object lens 160, this requires glass substrate 110 to have a big upper surface again, makes this optic pick-up system 100 heavy and through a long light path thus.
Therefore, a fundamental purpose of the present invention provides the integrated optical pickup system that a kind of size with shorter light path reduces.
Another object of the present invention provides a kind of optical system that is used to detect information signal, and wherein this information signal is used to detect the position of an object.
According to the present invention, the integrated optical pickup system of the information signal on a kind of record surface that is stored in CD that is used to regenerate is provided, comprise: one first glass substrate, have a upper end face and a rear surface, be used for a convergent beam be mapped to this record surface and this convergent beam after the reflection of this record surface with its collimation, wherein, the upper end face of this first glass substrate is relative with this CD; One second glass substrate has a upper end face and a rear surface, the wherein upper end face of the rear surface of first glass substrate and second glass substrate coupling; Double focusing beam splitter on rear surface that is integrated in second glass substrate, the collimated light beam that is used for passing the first glass substrate transmission is divided into first and second separating light beam, wherein this double focusing beam splitter comprises first and second portion, and each part has a focus of separating; And detecting device that first and second photovoltaic element is arranged, wherein each photovoltaic element is placed in respectively on the focus of separating of all parts of this double focusing beam splitter, makes this integrated optical pickup system read down information signal from the record surface of CD thus.
The present invention and above-mentioned and other purpose and advantage will be below become apparent in the description to the preferred embodiment that provides in the lump with accompanying drawing, wherein:
Fig. 1 represents the schematic side view of the integrated optical pickup system of a prior art;
Fig. 2 illustrates the cross-sectional schematic according to an integrated optical pickup system of the present invention;
Fig. 3 provides a vertical view of having represented the light path of light beam according to integrated optical pickup system of the present invention shown in Figure 2;
Fig. 4 provides a upward view of having represented according to the light path of the light beam of integrated optical pickup system of the present invention shown in Figure 2;
Fig. 2 to Fig. 4 has illustrated the various views of the integrated optical pickup system of invention according to a preferred embodiment of the present invention.
In Fig. 2, the cross-sectional schematic of an integrated optical pickup system of the present invention 200 that on a pair of glass substrate 210,212 its optics is integrated has been described.This integrated optical pickup system 200 comprises: one first and one second glass substrate 210,212, each glass substrate has a upper surface and a lower surface, a semiconductor laser 220 that is used to produce a light beam, a reflection collimation lens 240, a double focusing beam splitter 250, a transmission is from axle diffraction object lens 260, a reflectance coating 280 and the photodetector 290 that a pair of photovoltaic element is arranged, the wherein upper surface of the lower surface of first glass substrate 210 and second glass substrate 212 coupling.
In this integrated optical pickup system 200, the light beam that sends from semiconductor laser 220 is incident upon reflection collimation lens 240, and this light beam of this collimated is a parallel beam, to obtain a collimated light beam thus.Semiconductor laser 220 is attached to the lower surface of first glass substrate 210, and this collimated light beam is by reflectance coating 280 reflections, and this reflectance coating can reflex to the part of collimated light beam transmission from axle diffraction object lens 260.This reflectance coating 280 is formed on the lower surface of first glass substrate 210, and apart from 220 1 sections preset distances of semiconductor laser, and reflection collimation lens 240 is relative with reflectance coating 280 with semiconductor laser 220.Transmission is designed to it from axle diffraction object lens 260 will change a branch of converging light into the collimated light beam that oblique angle θ propagates, and this converging light has an optical axis that is formed from the central point and the convergent point on the CD 270 of axle diffraction object lens 260 by transmission.Fig. 3 illustrates and describes semiconductor laser 220, reflection collimation lens 240 and the transmission vertical view from axle diffraction object lens 260 layouts.This collimated light beam passes transmission after axle diffraction object lens 260, converges on the record surface 272 of CD 270.Transmission is integrated on the upper surface of first glass substrate 210 from axle diffraction object lens 260, and is relative with the record surface 272 of CD 270.
This convergent beam via the record surface 272 reflection back of CD 270 see through also play the collimation lens effect transmission from axle diffraction object lens 260 to collimate this convergent beam thus.The part of transmitted light beam reaches double focusing beam splitter 250 through reflectance coating 280, the part that this reflectance coating 280 can transmission passes its this transmitted light beam.
With reference to figure 4, double focusing beam splitter 250 comprises a first 252 and a second portion 254, and each part all has a focus of separating.Certain part of transmitted light beam is divided into first and second separating light beam after passing double focusing beam splitter 250.First photovoltaic element 292 of photodetector 290 and second photovoltaic element 294 are set at the first 252 of double focusing beam splitter 250 and the focus place of second portion 254 respectively.Each can both measure the intensity of light beam to be measured on it first photovoltaic element 292 and second photovoltaic element 294.Reach first photovoltaic element 292 and second photovoltaic element 294 respectively from first and second separating light beams of each partial reflection of double focusing beam splitter 250, make the information signal on the record surface 272 of integrated optical pickup system 200 regeneration CDs 270 thus.
Compare with the integrated optical pickup system 100 of prior art, the size of integrated optical pickup system 200 of the present invention has reduced, and light path is shorter.This is by using a pair of glass substrate 210,212, thus the reflection double focusing beam splitter 150 in the prior art integrated optical pickup system 100 is integrated on second glass substrate 212, reduced to be integrated in the optics of first glass substrate, 210 upper ends, this itself will shorten the light path that light beam must pass through again, cause reducing of this entire system size.
Even the description of this invention is just with reference to optic pick-up system and a preferred embodiment of its various opticses being integrated on the wherein a pair of glass substrate, the idea that proposes above can be opened up wide in an optical system that is used to read information signal, and this system is used to detect a specific part that can reflect the object that is incident upon the light beam on it.
Though narration of the present invention with reference to preferred embodiment, can be made other modifications and variations under the situation of the spirit and scope of the present invention that propose in the claim below not deviating from.
Claims (16)
1, the integrated optical pickup system of the information signal on a kind of record surface that is stored in CD that is used to regenerate comprises:
One first light guide, be used for a convergent beam is incident upon on this record surface and this convergent beam by after this record surface reflection with its collimation; And
One second light guide, a wherein integrated detecting device, this light guide are used for this collimated light beam from first light guide this detecting device that leads, and make the information signal on the record surface of integrated optical pickup system regeneration CD thus.
2, integrated optical pickup system as claimed in claim 1, wherein this first light guide comprises:
One first photo-coupler is used for a beam collimation that will be incident upon on it;
One optical devices, a part that is used to reflect this collimated light beam; And
One second photo-coupler is used for this folded light beam is converged on the record surface of CD to produce this convergent beam thus.
3, integrated optical pickup system as claimed in claim 2, wherein these optical devices are integrated in the lower end of this first light guide, and are relative with first and second photo-couplers that are integrated in first light guide upper end.
4, integrated optical pickup system as claimed in claim 3, wherein these optical devices are made to a part of transmission that at first will be incident upon this converging light on it at convergent beam from CD reflection then again through passing this second photo-coupler after collimated.
5, integrated optical pickup system as claimed in claim 4, wherein this second light guide comprises the 3rd photo-coupler with one first and one second portion, the collimated light beam that is used for passing these optical devices is divided into one first and one second separating light beam, and wherein the 3rd photo-coupler each part of being designed to the 3rd photo-coupler all has a focus of separating.
6, integrated optical pickup system as claimed in claim 5, wherein the 3rd photo-coupler is integrated in the lower end of this second light guide, and is relative with these optical devices with this detecting device.
7, integrated optical pickup system as claimed in claim 6, wherein the 3rd photo-coupler can reflect the separating light beam that each passes first light guide.
8, integrated optical pickup system as claimed in claim 7, wherein, this detecting device comprises one first and one second photovoltaic element.
9, integrated optical pickup system as claimed in claim 8, wherein, each photovoltaic element of detecting device has the receiving surface that can measure the intensity of light beam to be measured on it.
10, integrated optical pickup system as claimed in claim 9, wherein said each photovoltaic element is placed in the corresponding focus of the 3rd photo-coupler.
11, an optical system is used to detect an information signal, and wherein this information signal is used to detect the position of an object, and this system comprises:
One has first light guide of a lower surface, is used for a convergent beam is incident upon the specified point of object, and this convergent beam by after the reflection of this specified point with its collimation;
One has second light guide of a upper surface, is used for the collimated light beam from first light guide is divided into one first and one second separating light beam, and wherein the upper surface of the lower surface of this first light guide and this second light guide is coupled; And
Have one first and the pick-up unit of one second photovoltaic element, be used for receiving respectively first and second separating light beams.
12, a kind of integrated optical pickup system, the information signal on the record surface that is stored in a CD that is used to regenerate, this system comprises:
One has first glass substrate of a upper surface and a lower surface, be used for a convergent beam is incident upon record surface, and this convergent beam by after the reflection of this record surface with its collimation, wherein, the upper surface of this first glass substrate is relative with this CD;
One has second glass substrate of a upper surface and a lower surface, the wherein upper surface of the lower surface of this first glass substrate and this second glass substrate coupling;
A pair of focused beam optical splitter, be integrated in the lower surface of second glass substrate, the collimated light beam that is used for passing first glass substrate is divided into one first and one second separating light beam, and wherein this double focusing beam splitter comprises one first and one second portion, and each part has a focus of separating; And
One has one first and the detecting device of one second photovoltaic element, wherein each photovoltaic element is respectively placed on each branch focal point place of this part of this double focusing beam splitter, makes this integrated optical pickup system read information signal on the record surface of CD thus.
13, as the integrated optical pickup system of claim 12, wherein this first glass substrate comprises:
The semiconductor laser instrument is used to produce a light beam, and wherein this semiconductor laser is attached to the precalculated position on the lower surface of first glass substrate;
One optical devices, a part that is used to reflect this light beam, wherein these optical devices are formed on the lower surface of first glass substrate, apart from one section preset distance of semiconductor laser;
One mirror lens is integrated on the upper surface of first glass substrate, and wherein this mirror lens is relative respectively with this semiconductor laser and this optical devices; And
One object lens are used for it being collimated after the record surface reflection with collimated beam and at this convergent beam, and wherein these object lens are integrated on the upper surface of first glass substrate, and are relative with the record surface of CD, to produce convergent beam thus.
14, as the integrated optical pickup system of claim 13, wherein this double focusing beam splitter is relative with these optical devices with this detecting device respectively.
15, as the integrated optical pickup system of claim 14, wherein these optical devices be made into from a part of lens of the collimated light beam of object lens to this double focusing beam splitter.
16, as the integrated optical pickup system of claim 12, wherein this double focusing beam splitter can reflect from the collimated light beam of the first glass substrate transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96120857 CN1155666A (en) | 1995-11-27 | 1996-11-27 | Integrated optical pickup system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR43818/95 | 1995-11-27 | ||
| CN 96120857 CN1155666A (en) | 1995-11-27 | 1996-11-27 | Integrated optical pickup system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1155666A true CN1155666A (en) | 1997-07-30 |
Family
ID=5126626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96120857 Pending CN1155666A (en) | 1995-11-27 | 1996-11-27 | Integrated optical pickup system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1155666A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338438C (en) * | 2000-06-15 | 2007-09-19 | 诺基亚有限公司 | Method and apparatus for distributing light within light guides |
| CN104254792A (en) * | 2011-12-13 | 2014-12-31 | 奥普特发明公司 | Optical guide with superposed guidance elements and method of manufacture |
| CN108051929A (en) * | 2018-01-09 | 2018-05-18 | 北京驭光科技发展有限公司 | Three-dimensional information detection light field optical system and its method |
| CN110196473A (en) * | 2018-02-27 | 2019-09-03 | 三星电子株式会社 | Photonic integrated circuits packaging part |
-
1996
- 1996-11-27 CN CN 96120857 patent/CN1155666A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338438C (en) * | 2000-06-15 | 2007-09-19 | 诺基亚有限公司 | Method and apparatus for distributing light within light guides |
| CN104254792A (en) * | 2011-12-13 | 2014-12-31 | 奥普特发明公司 | Optical guide with superposed guidance elements and method of manufacture |
| CN108051929A (en) * | 2018-01-09 | 2018-05-18 | 北京驭光科技发展有限公司 | Three-dimensional information detection light field optical system and its method |
| CN110196473A (en) * | 2018-02-27 | 2019-09-03 | 三星电子株式会社 | Photonic integrated circuits packaging part |
| CN110196473B (en) * | 2018-02-27 | 2022-11-01 | 三星电子株式会社 | Photonic integrated circuit package |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4022412B2 (en) | Composite reflection prism and optical pickup device using the same | |
| US6072607A (en) | Optical pickup device | |
| US5787058A (en) | Optical pickup apparatus utilizing a polygonal prism | |
| JP2000048386A (en) | Wavelength photosensitive beam combiner having aberration compensation | |
| US5745304A (en) | Integrated optical pickup system capable of reading optical disks of different thickness | |
| US5737295A (en) | Dual-focus optical pickup for different thicknesses of recording medium | |
| US5721629A (en) | Dual-focus forming method and apparatus thereof | |
| CN1155666A (en) | Integrated optical pickup system | |
| CN1153379A (en) | Optical pickup system capable of reading multiple number of optical disks | |
| KR950005957B1 (en) | Optical pick up system | |
| EP0776001A2 (en) | Integrated optical pickup system | |
| KR20070028533A (en) | Apparatus and method for generating a scanning beam in an optical pickup head, miniature optical pickup head and optical storage system incorporating a miniature pickup head | |
| JP2506972B2 (en) | Optical pickup device | |
| KR100850701B1 (en) | Prism having multiple reflection surfaces and optical pickup apparatus | |
| KR100480635B1 (en) | Optical pickup and wedge type beam splitter | |
| KR0137246B1 (en) | Optical pick-up device of compact disc player | |
| CN1182933A (en) | Size reduced compact disc picking up system | |
| KR0181815B1 (en) | Dual focus optical pickup device | |
| KR100403596B1 (en) | Optic pickup apparatus comprising a right-angled triangle beam splitter and method of compensating optic axes using the same | |
| CN1155730A (en) | Integrated optical pickup system capable of reading optical disks of different thicknesses | |
| KR19990049998A (en) | Light Control LCD Dual Focus Optical Pickup Device | |
| KR100234313B1 (en) | Optical pickup apparatus | |
| KR20030080592A (en) | Compatible optical pickup | |
| JPH11203707A (en) | Semiconductor integrated light emitting device and optical pickup device | |
| KR20030019957A (en) | Optical pickup comprising a polygon prism and method of compensating optical axes using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |