TWI334135B - Colinear system for recording and reproducing holographic storage - Google Patents

Description

1334135. IX. Description of the invention: [Technical jaw region to which the invention pertains] The present invention relates to a holographic storage and regeneration system, and more particularly to a holographic storage and regeneration system for coaxial and phase conjugate . [Prior Art]

At present, in the optical storage media market, because the capacity of commercial Blu-ray discs is still difficult to exceed the 100 GBytes level, various possible ultra-high-capacity recording technologies are being widely developed, and the most potential of them is Into the like, the development of holographic recording technology has a long history, but many factors make it impossible to be applied to consumer optical storage products. Hundreds of milliwatts of high-power laser light source and complex _ light material system, and with a heavy shock absorber table, and often as a full-image record _ light riding crystal (PhGt (M<efraetive mussels Can't compare with other cheap media, but the progress of the technology and the change of thoughts make the county add to the limit of the full-recording technology - such as the small Wei high-power recording, high-sensitivity recording materials and The small data access optical system of the position ship function has made specific progress. In the past, it was thought that the recording medium must be rewritable and the consumption habit of the disc market was shaken. Repeated recording materials of light-refracting crystals satisfy the conditions of good materials, stability, and low price. They are still very singular things. In recent years, they have been written by CM/DVD_R. Inspired by sounds and sounds, therefore, the holographic record does not have to be pursued. It is also widely accepted that it is widely accepted. If it is functional, there are many cheap and high-sensitivity options. As a holographic system, for example, a kind of light-gathering, do not shoot 015 whistle, is one of them. Photopolymers are chemically reacted in a strong record, so they can use molecules. The key (4) caused by the key, the 4th (four) special _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The material is derived from (10) VD fine-service mechanism, which is a key to making holographic discs practical. For holographic storage technologies, such as US Patent Gazette No. 2_212859 and No. 67 专利, the system is worn on a type of disc It is a transmissive light material system design, so the image sensing is read on the other part of the disc, so that the overall system volume becomes larger, and the design of the transmissive pattern is designed to be fine. It is perpendicular to the disc, and the reference beam needs to be obliquely incident on the disc. Therefore, the relative position and direction of the reference beam and the disc are prone to deviation...but when the deviation occurs, when the reference beam is offset from the original path When the shift is increased, the noise ratio of the signal light is reduced by the I method*, and the g-number of light is recognized. Therefore, it is impossible to capture the regenerative light by adjusting the signal path. The image sensor that accepts the regenerated optical signal is not 1334135. Get any signal of regenerative light, when 7 屮T over AAS ..., method and image processing technology also eyebrows the correct reproduction data, although for the quiet ~ original test light direction and position of the small amplitude scan, still get == = For the continuous moving disc, it is still difficult, also called the signal of the regenerative light. Another related art, such as U.S. Patent Publication No. 6 and U.S. Patent No. 6,095,529, is proposed for the optical architecture of the 5th, (4), and 4th test discs. However, no specific servo method has been proposed.

Therefore, the conventional holographic storage and regeneration system has a large volume, is not easy to assemble, and has a read quality test aberration, and the invention has the above-mentioned problems. The present invention provides _ kinds of _ and phase Light-recycled holographic storage and regeneration (4), and the side-by-side mechanism, which can reduce the optical architecture _ 'and improve the quality of data reading and reproduction and is very convenient and fast for data storage and retrieval.

The invention relates to a kind of full-age age reproduction system, which is characterized in that a disk storage-to-image dry frequency includes a light source, a first light guiding portion, a light spatial modulation H, and a second light guiding light. The part and the lens H are used to generate a Coherent Light. The first light guiding portion is configured to guide the dimming light into an illuminating light and a reference light, and the first light guiding portion causes the signal light to be incident on the disc in a first direction. The optical spatial modulator is movably disposed at a first position on the optical path of the signal light, and is modulated by the signal light after passing through the optical spatial modulator during storage. The second light guiding portion guides the reference light to the disc in the direction of the 9th mountain 4135. And the concave lens is disposed on the second light guiding portion, and the 吏's light rides to the concave lens to delay the focusing, so that the reference wire signal light overlaps and interferes with each other, thereby generating a hologram interferogram in the disk. Wherein, when 2 o' the optical spatial modulator is moved to a second position, and the signal optical path is = 考光小科- direction of the person to the full Xuan frequency, and then reflected by the reflection θ to the full Xuan frequency ' A residual light is generated, and a total of the regenerated light is incident on the first image sensor in the opposite direction along the signal light path. In addition, the light fixture of the present invention can also be set in a fixed manner, that is, to perform the re-p 1 so that the light __ does not pass the paste, and the light of each of the beams passes through. & The effect of this month is the proposed coaxial holographic storage and regeneration system. The :::light and signal light are incident on the disc from the same axial direction, thus simplifying the photonic structure, and the accumulation of objects is small and easy. Advantages. Charm, the invention can be combined with tracking or focusing the shoulder light path, and can also be compatible with the bribe mechanism of the traditional CD/DVD disc player, and can achieve the function of fast tracking, and can make the whole image dry, and even The Betty's feeding suit can be continuously recorded on the disc. Further, in the case of the present invention, a total of phase-conjugated regenerative light can be generated, thereby avoiding regenerative reading (4), which causes a problem of good reading quality due to riding problems. In addition to this, the present invention can utilize the multiplex mechanism of the hologram to increase the capacity of the disc. The features and implementations of the present invention are described in detail in the preferred embodiments. [Embodiment], one of the inventions that Mr. Zhang has invented. The understanding of Fu and 锊 is described below. First, please refer to "Coaxial _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Source 100, a first light guide

- Optical spatial modulator 500, a first-to-distance common-disc_.苐一—First, a lens 33〇 The laser light of the sun. The first light guiding portion 2 is configured to receive the same dimming light emitted by the light source ι, and is divided into - Qian Guangxian and - reference light 1〇3, and the first light guiding portion 200 guides the signal light problem. It is incident on the disc 600 in a first direction.

Fu 4, % sign, and its function has a light source 100 ' is used to generate - coherent Llght, in this embodiment plus (8) can be - visit launch ϋ marriage - wavelength is 4 〇 5 light space adjustment The light space modulator 500 is moved to the first position and is located at the signal light when the coaxial holographic storage and regeneration system is being stored for storage. In the light path of (1), the signal light 101 is modulated by the optical spatial modulator 500. The first light guiding portion 300' is for guiding the reference light 103 separated by the first dichroic mirror 210 so that the reference light is also incident on the disc 6〇〇 from the first direction. The concave lens 330 is disposed on the second light guiding portion 3A for causing the reference light 1〇3 guided by the second light guiding portion 300 to be incident on the lens 330 to generate a delay 11 1334135 and then focus 'for reference. The light beams 103 and the signal light ιοί overlap and interfere with each other, thereby generating a hologram interferogram 700 in the disc 600. The first light guiding portion 200 includes a lens group 220, a first beam splitter 210, a first mirror 230, a second beam splitter 240, a third beam splitter 250, and an objective lens 270. When storing in the coaxial holographic storage and reproduction system, the light source 100 emits a dimming beam, and then first enters a lens group 22 〇 for expanding the same dimming beam and then incident on the first beam splitter 210. The first beam splitter 210 splits the beam of the expanded beam into two beams, and the beam that is reflected by the first beam 21〇 and turned to the second light guiding portion 300 is called the reference light 1〇3, and directly passes through the first beam splitter. The beam of a beam splitter 210 is referred to as signal light 1〇1. Then, the signal light 101 is incident on the first mirror 23A, and the signal light 101 is reflected and turned in the first direction, and is incident on the second beam splitter 240. Lu part 彳 唬 101 101 101 directly passes through the second beam splitter 24 〇, and then incident on the movable optical spatial modulator at the first position, so that the signal light (6) is modulated, and the modulated signal light 101 people The light is incident on the third beam splitter 250. The third beam splitter 250 is disposed at the intersection of the signal light 1〇1 light path and the reference light • 103 light path′ while the partial signal light 101 is incident on the third beam splitter 25G and can pass directly through the third beam splitter 25〇. And then incident on the objective lens 27〇, and the objective lens 270 focuses the #1 light 1〇1 to the disc, and the second light guiding portion 3GG includes the shielding plate 3丨Q, the second reflection 12 mirror′′ and a Lens 330. The cover plate 310 is disposed on the light path of the reference *1〇3. Therefore, when stored in the coaxial king image storage and reproduction system, it is reflected by the first beam splitter and #r is incident on the reference light 1〇3. The second light guiding portion first passes through the shielding plate 310 and then enters the second reflecting mirror 320, so that the reference light 103 is reflected and turned, and is incident perpendicularly to the lens 33A. Among them, the concave lens 330 is a weak lens (WeakLens) which has a longer focusing focal length than a φ-like concave lens to achieve a slow divergence incident to the reference light 1〇3. The reference light 1 〇 3 diverged by the lens 33 is incident on the third mirror 25 〇 such that part of the reference light 1 〇 3 is reflected by the third beam splitter and the vehicle τ travels in the first direction of the 并 / 〇 and passes through the objective lens π . The reference light is focused into the disc 600, and the reference light 103 and the signal light 1〇1 overlap each other and interfere to generate a hologram interferogram 700, which is stored by the recording layer 62A. Next, the eye is referred to as "Fig. 1B", which is a partial enlarged view of the coaxial holographic storage and reproduction system of the first embodiment of the present invention. The signal light 101 incident on the disc 600 is focused by the objective lens 27 to converge the signal light. However, the reference light 1 〇 3 incident on the disc 600 is twice focused by the lens 33 〇 and the objective lens 270. The reference light 1 〇 3 is condensed, so that the reference light 'be reflected by the 640 is focused later than the signal light 101' and its reference light 103^ focus point is located at the overlapping position of the focus point of the signal light 101. Moreover, since the lens 33 is a weak lens, the focus points of the reference light 103 and the signal light 101 are not too far apart, and thus an overlapping interference region can be formed and can be incident coaxially by the first side 13 1334135. The signal light 101 and the reference light 103 can form a hologram interferogram and perform a function of holographic storage. The disc 600 is as shown in FIG. 1B. In the present embodiment, the disc 600 is a holographic recording medium (H〇1〇graphic St〇rage Medm), and therefore, the disc is The hologram interferogram 7 can be stored in the 600, and the disc 600 includes a first substrate 61 〇, a second substrate 63 〇, and a

C recording layer 620 and a reflective layer 640. The recording layer 62 is formed between the first substrate 610 and the second substrate 630, and the recording layer 62 储存 can store and record incident optical signals, such as omnidirectional dry frequencies. The reflective layer is formed on the bottom surface of the second substrate 63G, that is, on the side opposite to the recording layer (4), for the incident signal light 101 and the reference light 1〇3 to be reflected, and the reflective layer 64 is formed on the reflective layer 64 - 祠 trajectory 642, 祠 执 执 ( 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 642 642 642 642 642 642 642 642 642 642 642 642 642 642 642 642 642 642 By the modulation of the servo trace ^, and when the servo light is reflected by the lion (4), it can be known that the beam is located at a certain position of the disc _ to achieve the function of data tracking.

Next, please refer to Fig. 2, which is a diagram of reproduction of the coaxial holographic storage and reproduction system according to the first embodiment of the present invention. In the coaxial=image=reproduction and regeneration system of the present invention, when the regeneration is performed, the nucleus is configured to be in a phase of storage. The main difference is that when the light source is incident on the first light guiding portion, the first beam splitter 21 is used. The signal light 1Q1 and the reference pupil Z 1〇1 continue to travel to the first light guiding portion, and the reference light guides the second light guiding portion 300. When the reference light 〇3 that travels to the second light guiding portion 3 is incident on the shielding plate 310, it is blocked, and cannot be incident on the disk 600 through the shielding plate 3 〇. In addition, when the coaxial holographic storage and reproduction system performs regeneration, the optical spatial modulator 500 disposed in the first light guiding portion 200 is moved to a second position, so that the optical spatial modulator 500 does not fall under the signal light. In the light path of 101, that is, the signal light 101 is not modulated by the optical spatial modulator 5〇〇 and is incident on the disc in the first direction _ 'At this time, the signal light 1〇1 has the same property as the reference light, and It is regarded as the reference light 'but the direction of propagation of the reference light 1σ3 for the original recording is opposite. The reference light 1Q3 beam stored in the same direction and the opposite direction of the reference light beam to be reproduced are opposite in phase, and the effect of the phase is _ c〇 鹏 鹏 ' 因而 因而 因而 因而 因而 因而 因而 因而 因而 因而 因而 因而 因而 , , , , 共 共 共 共 共 共 共 共 共 共 共 共The regenerative light ι〇5 is reversely traveled along the path of the signal light 101, and the conjugated regenerated light 105 generated during the reproduction does not have the problem of aberration (Aberration) due to the phase common vehicle. Achieve good quality of regenerative reading. In her example, the light space vanishing 500 is a transmissive optical spatial modulator, wherein the transmissive optical spatial modulation H can be a liquid crystal panel. The common regenerative light 105 is directly incident on the second dichroic mirror 240 ′ through the third dichroic mirror 25 并 and is reflected by the second dichroic mirror 24Q to be redirected to a first image sensing 550 to reproduce the stored data. Or graphics. The first image sensor 550 can be a charge coupled device (CCD) or a complementary metal-oxide semiconductor 1334135 (Complementary Metal-Oxide Semiconductor; CMOS). In addition, as shown in Figures 1A and 2, the coaxial holographic storage and reproduction system of the present invention may further have a servo device. The servo device can include a servo light source 400 and a servo light guiding portion 420. ". Servo light source 400 is used to generate servo light 401, and the wavelength of the light of the servo light is different from the wavelength of light of reference light 103 and signal light 101. The vocal light 401 passes through the servo light guiding portion 420 and the second light guiding portion 300 to enter the trajectory 642 of one of the discs in the first direction, and the servo light 401 is modulated by the servo trajectory 642. The reflection is further guided to a sensing portion by the servo light guiding portion 420 to convert the servo light 401 into an electrical signal and transmitted to a control device 440' and the omnidirectional interference pattern 7 can be continuously tracked along the servo 642 is recorded on the disc 600. The servo light guiding portion further includes a dichroic beam splitter 424 and a holographic optical element (HOE) 422. When the servo light #4〇1 is emitted from the servo light source 400, it is incident on the hologram optical element 422 first, and is incident on the dichroic beam splitter 424 through the hologram optical element 422. The dichroic beam splitter 424 is disposed at the intersection of the light path of the servo light and the light path of the reference light, between the second mirror 320 and the lens 330, and the dichroic beam splitter 424' can make a specific wavelength range. The light is reflected, and the light outside the specific wavelength range can pass directly without being affected, so as to separate the light of different wavelengths. Therefore, when the reference light 1〇3 is incident on the dichroic beam splitter 424, the light can pass directly without passing the image. However, when the servo light 4〇1 is incident on the dichroic beam splitter 424, it is deflected by the 16^34135 and is turned into the lens 330 and the second beam splitter 250. Part of the servo light 401 is reflected by the second beam splitter 250 and steered, and is concentrated on the servo track 642 of the disc 600. The servo light 401 modulated and reflected by the servo track 642 reverses the path of the feeding light path incident on the element, and the partially-reflected servo light 401 is reflected by the second beam splitter 250 and turned, and then incident to The dichroic beam splitter 424, in the same manner, the servo light 401 is reflected by the dichroic beam splitter 424 and turned to be incident on the holographic optical element 422. At this time, the hologram # optical element 422 receives the modulated feeding light and will Light converges on the sensing portion to interpret the modulated light 401. The sensing unit further has a first photo Detector 430 for receiving and sensing the optical signal of the servo light. Please refer to "Fig. 3A" and "Fig. 3B", which is a coaxial holographic storage and reproduction system according to a second embodiment of the present invention. The second embodiment of the present invention is identical to the main principles and architecture of the first embodiment, and the main difference is that the movable optical spatial modulation 55 is disposed on a turntable in the first embodiment. Wherein the turntable 510 is formed with at least one opening 5 () 2 and a light spatial modulator 500. When the coaxial holographic storage and regeneration system is being stored, the inter-modulator 500 is rotatably disposed on the light path of the signal light 1〇1, that is: • in the first position 'and the opening is in the second position If the "3a" - 咐 ' and # _ full_regeneration system is performing regeneration, the optical spatial modulator 500 is rotated to the second position, and the opening 5 〇 2 is rotated to the first position, and The signal light 101 is directly passed through the opening 5〇2 without being modulated, as shown in the "17th 3-1". The embodiments on the 、, 可 can be combined with various multiplex mechanisms, such as displacement multiplex wavelength multiplexing, to increase storage capacity.

The simplistic omnidirectional image of the present invention = light and signal light are all incident on the disc, so that the light is applied to the wood structure, and the advantages of small size and easy assembly are achieved. Moreover, the present invention can be combined with the seek or focus light path, and can also be compatible with the mining mechanism of the conventional CD/DVD player, and can be quickly searched, and the hologram can be continuously carried along the ship. The track can be continuously recorded in the system. In addition, this month in the L Gastroenterology, she can produce a total of regenerative light, so as to avoid the problem of poor reading quality due to aberrations. In addition, the present invention can provide a multiplexed multiplex mechanism, and the capacity of the disc is further improved. Although the present invention has been disclosed above in the foregoing preferred embodiments, it is not intended to limit the invention to any skilled artisan, and may be modified and retouched without departing from the spirit and scope of the present invention. The patent for the invention shall be subject to the definition of the scope of the application in this specification. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a structural diagram of storage of a coaxial holographic storage and reproduction system according to a first embodiment of the present invention; FIG. 1B is a coaxial holographic storage and reproduction system according to a first embodiment of the present invention; Partially enlarged view; 18 1334135 FIG. 2 is a structural diagram of the reproduction of the coaxial holographic storage and reproduction system according to the first embodiment of the present invention; and FIGS. 3A and 3B are coaxial views of the second embodiment of the present invention. Like a storage regeneration system. [Main component symbol description]

100 light source 101 signal light 103 reference light 105 conjugate regenerative light 200 first light guiding portion 210 first beam splitter 220 lens group 230 first mirror 240 second beam splitter 250 third beam splitter 270 objective lens 300 second light guiding portion 310 shielding plate 320 second mirror 330 lens 400 servo light source 401 servo light 19 1334135

420 servo light guide 422 holographic optical element 424 dichroic beam splitter 430 second image sensor 440 control device 500 light space modulator 502 opening 510 turntable 550 first image sensor 600 disc 610 first substrate 620 Recording layer 630 second substrate 640 reflective layer 642 servo trace 700 holographic interferogram 20

Claims (1)

1334135 X. Applying for a patent, the system is to store a hologram interferogram on a disc, 1. The _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ , · , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,卩 causing the light to be incident on the disc along the first-direction direction; The "a light-air _ variator" is movably disposed at the -first position and is located at the age of the seventh ray of light, so that the money is modulated after passing through the intermodulator; The reference light emitted from the light guide portion is also incident on the disc in the first direction; and a lens is disposed on the second light guide portion to cause the reference light to be incident on the light guide portion The lens is refracted to generate the hologram interferogram in the disc; wherein 'when the reproduction is performed, the light spatial modulator is moved to a second position, and the signal light is again along the first direction When the person is shot to the hologram, the common regenerative light is generated and the county regenerative light is incident oppositely along the money path - the first image sensor. 2. As described in claim 1 In the coaxial holographic storage and regeneration system, the first light guiding portion further comprises: ^ ^ a first mirror for reflecting and diverting the signal light to be incident along the first direction; and a second beam splitter for The storage is used to receive the reflection of the state 4135 reflected by the first mirror 21 The signal portion passes the signal light, and when the reproduction is performed, the light is regenerated, and the conjugated regenerated light is reflected and turned to be incident on the first image sensor. 3. Shen: Patent The coaxial holographic storage and regeneration system according to Item 2, wherein the illuminating light P further comprises a third beam splitter disposed on the signal light path, at the intersection of the path of the Caisuo wire, and the rib Passing the signal wire through the a third beam splitter, and a portion of the reference light is reflected by the third beam splitter to be turned such that the reference light is incident on the disc in the first direction. 4. The coaxial holographic storage and reproduction system of claim 3, wherein the second light guiding portion further comprises: a shielding plate disposed on the optical path of the reference light, the coaxial hologram When the regenerative reproduction is performed, the shielding plate is selectively used to shield the reference light so that the reference light cannot be incident on the disc; and the second mirror is configured to reflect the reference light Steering, so that the reference light = straight field of the thorn mirror, Wei _ Wei _ reference light ride to the third 5. If the application of the special fiber around the IM item of the coaxial holographic storage regeneration pure 'where + lens is a Weak lens (WeakL (4), used to refract the angle by a small amount. If the application is for the 5th, the coaxial hologram is a concave lens, which can be a concave lens to slowly diverge the reference light. The coaxial full-image scale reproduction system described in the scope of the patent application, wherein the film system comprises: 22 1334135 a first substrate and a second substrate; and the recording layer 'opening' is formed on the first substrate and Between the second substrates, for recording the interference between the light and the reference light a full-needle pattern; and a reflective layer 'on the bottom side of the second substrate for causing the signal light and the reference light emitted by the human to be reflected. 8. As described in claim 1 The storage regenerative system further includes a servo device, and wherein the disc comprises: a first substrate and a second substrate; a recording layer formed between the first substrate and the second substrate Recording a holographic interferogram of the interference between the money light and the light-receiving phase; and a reflective layer formed on a bottom side of the second substrate, the rib causing the signal light and the reference light emitted by the human to be reflected; A reflective track is formed on the reflective layer, and the servo track is composed of a plurality of plural holes or bumps.