公开(公告)号：JPH11119124A

公开(公告)日：1999-04-30

申请号：JP17740598

申请日：1998-06-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAMPBELL SCOTT PATRICK ,  CURTIS KEVIN RICHARD ,  TACKITT MICHAEL C

IPC: G02B26/08 ,  G11B7/0065 ,  G11B7/09

Abstract: PROBLEM TO BE SOLVED: To send an objective light beam to the prescribed position of a holographic memory cell(HMC) by arranging the HMC in the vicinity of a second focal plane for receiving a beam at a location being the function of a desired direction. SOLUTION: The angular displacement θ of an image reflected by a rotatable mirror 305 generates the positional displacement ΔR of an image reflected by the mirror 305 in the HMC 310. Thus, rotation of the mirror 305 from a first position i.e., an original position to a second position i.e., the rotated position generates the positional displacement ΔR of the image in the HMC 310. The image by the movement of the mirror 305 traces a circular path 312 on the front surface of the HMC 310. First, when the mirror 305 is rotated by an angle θ, the normal is located on an axis B by the moving angle ω1, the image in the HMC 310 is converted to the point ω1 by ΔR. When the axis B is moved to a moving angle ω2 about an axis A, the image in the HMC 310 is converted to the point ω2, the position is a place separated by ΔR from the center of the circular path 312.

公开(公告)号：JPH1097792A

公开(公告)日：1998-04-14

申请号：JP16889297

申请日：1997-06-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAMPBELL SCOTT PATRICK ,  CURTIS KEVIN RICHARD ,  RICHARDSON THOMAS J

IPC: G03H1/26 ,  G11B7/0065 ,  G11C7/00 ,  G11C13/04

Abstract: PROBLEM TO BE SOLVED: To rapidly and effectively access the data page and to read out in a holographic system. SOLUTION: The method uses the page indicator (mark) which is stored in a memory medium together with the data page. The page indicator is stored so that the picture quality of the page indicator to be projected represents the picture quality of the corresponding projected data page on the detector 80 during its reproduction. The picture quality of the projected page indicator is monitored in its reproduction. Based on the picture quality monitored, the system parameter is further varied or the the data from the corresponding page indicator projected on the detector is read out without varying the parameter. Based on detection of the sufficient picture quality of the projected page indicator, the page identifying information such as the page number projected together with the page data can be detected.

公开(公告)号：JP2000030468A

公开(公告)日：2000-01-28

申请号：JP7488699

申请日：1999-03-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAMPBELL SCOTT PATRICK ,  CURTIS KEVIN RICHARD

IPC: G02B5/32 ,  G03H1/04 ,  G03H1/28 ,  G11B7/0065 ,  G11C13/04

Abstract: PROBLEM TO BE SOLVED: To provide a holographic memory system which does not need an additional optical system between a spatial light modulator(SLM) and a phase mask. SOLUTION: An optical system at the time of forming a holographic optical element(HOE) has an SLM16 which can act in an off-access mode and an HOE 50 in which the hologram of the phase-coded HOE object light is stored, and light sources 62, 63 generating an HOE reference beam 54 and an HMC reference beam 64. The SLM(spatial light modulator) 16 can cause amplitude modulation to the phase-coded HOE object light 44. When SLM 16 is irradiated with the phase-coded HOE object light 44, it emits amplitude-coded and phase-coded HMC(holographic memory cell) object light 44, and this HMC object light 44 interferes with HMC reference light 64 in HOE 50, and a hologram of the HMC object light 44 is stored in the HOE 50.

公开(公告)号：JPH11120609A

公开(公告)日：1999-04-30

申请号：JP17740798

申请日：1998-06-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAMPBELL SCOTT PATRICK ,  CURTIS KEVIN RICHARD ,  TACKITT MICHAEL C

IPC: G03H1/02 ,  G03H1/22 ,  G11B7/0065 ,  G11B7/085 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To direct substance lights to the prescribed position of a HMC (hologram memory cell) by arranging the HMC rotatably with respect to the axis of a HMC surface in the vicinity of the focal plane formed by refractingly transmitting the beams which are reflected with reflection elements. SOLUTION: A rotatable mirror 320 rotates within an angle θ to transmit reflected beams through a lens 325 to form an image on a HMC 330. Here, the angular displacement θ of the reflection image generates the positional displacement ΔR of an image which is reflected on the HMC 330 by the mirror 320 and the image being on the HMC 330 becomes in a focused state regardless of the rotation angle of the mirror 320 whilst the ΔR is scanned in an adequate range. A fixed mirror 310, a lens 315 and the rotatable mirror 320 are respectively mounted at fixing positions on a drive arm 335. The radius of the mirror 320 is fixed with respect to the angle θof the mirror. A rotation control device 340 turns the arm 335 on the orbit of 360 degrees according to a turning angle 4. Thus, the direction of the image reflected from the rotatable mirror 320 to the HMC 330 is controlled with ϕ and θ.

公开(公告)号：JPH1172601A

公开(公告)日：1999-03-16

申请号：JP15247798

申请日：1998-06-02

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAMPBELL SCOTT PATRICK ,  ALEXANDER LOEWE HARRIS ,  NICHOLAS JAMES LEVINOS

IPC: G02B1/10 ,  B32B17/10

Abstract: PROBLEM TO BE SOLVED: To provide a process for manufacture of multilayered optical products which is easier and is less costly than the conventional process for forming various kinds of products having excellent optical characteristics, such as, for example, surface flatness and propagation flatness or curving and a system having the multilayered optical products. SOLUTION: This process for manufacture of the multilayered optical products is so constituted that the outside surface of a first substrate is held by a first holder, the outside surface of the first substrate is held at the inside surface of the first holder, held at the outside surface of a second substrate by a second holder and the outside surface of the second substrate is held at the inside surface of the second holder. Further, the first and second holders are so arranged that the inside surfaces thereof face each other at a selected angle relation. Tacky adhesives are arranged on the one or plural surfaces selected from the inside surfaces of the first and second substrates. The first and second holders are moved relative to each other in such a manner that the inside surfaces of the first and second substrates come into contact with the tacky adhesives. The tacky adhesives are at least partly annealed while the inside surfaces of the first and second holders are maintained at the selected angle relation so as to form the multilayered optical products.

公开(公告)号：JPH11101946A

公开(公告)日：1999-04-13

申请号：JP17741098

申请日：1998-06-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAMPBELL SCOTT PATRICK ,  CURTIS KEVIN RICHARD ,  TACKITT MICHAEL C

IPC: G11B7/09 ,  G02B26/08 ,  G03H1/22 ,  G03H1/26 ,  G11B7/0065

Abstract: PROBLEM TO BE SOLVED: To enable the control of the spatial modulation composite incident light beam of coherent light by moving first and second reflection elements in such a manner that the incident beam irradiates the location which is the function of the movement of first and second reflection elements. SOLUTION: In the position where a mirror 310 and a mirror 315 move parallel, the object light is made incident at the point A on the surface of the mirror 310 and is thereafter reflected toward the point E on the surface of the mirror 315. The object light is again reflected toward the point D on the surface of a hologram memory cell(HMC) 330 at this point E. The object light intersects orthogonally with this HMC 330. In such a case, the distance at which the object light moves by passing the point D from the point A is equal to the distance which the object light moves from the point A to the point F. The parallel moving quantity Δ1 of the mirror 310 and the mirror 315 is the parallel moving quantity Δ2 at the HMC 330 and this parallel moving quantity Δ2 depends on the direction of the mirror 310 and the mirror 315 and the absolute positions thereof.

公开(公告)号：JPH11101945A

公开(公告)日：1999-04-13

申请号：JP17740898

申请日：1998-06-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAMPBELL SCOTT PATRICK ,  CURTIS KEVIN RICHARD ,  TACKITT MICHAEL C

IPC: G11B7/09 ,  G02B26/08 ,  G03H1/22 ,  G03H1/26 ,  G11B7/0065 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To enable the control of a composite incident light beam direction by allowing an incident beam to irradiate the location which is the function of the moving quantity of two reflection elements on the plane of a holograph memory cell(HMC) and the rotating position of the HMC. SOLUTION: A driving arm rotates a mirror 310 and a mirror 320 by the same quantity by a rotational control mechanism in such a manner that the angle formed by the surfaces of these mirrors is kept constant. Object light 311 is reflected from the mirrors 310, 320 and enters the HMC 330. When the mirrors 310, 320 rotate, the object light is reflected along an optical path and enters the surface of the HMC 330 with a deviation by a distance ΔR. This object light is maintained at the specified incident angle on the HMC 330 even if the direction thereof is changed. The optical path length of the object light is thus kept constant even if the mirrors 310, 320 rotate. The direction control is achieved on the second axis of a cylindrical coordinate diameter (R, ϕ) by the angle ϕ of swiveling of the HMC 330.

公开(公告)号：JPH1184269A

公开(公告)日：1999-03-26

申请号：JP17740698

申请日：1998-06-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAMPBELL SCOTT PATRICK ,  CURTIS KEVIN RICHARD ,  TACKITT MICHAEL C

IPC: G02B26/08 ,  G03H1/22 ,  G03H1/26 ,  G11B7/00 ,  G11B7/0065 ,  G11B7/085

Abstract: PROBLEM TO BE SOLVED: To send the beam of high spacial band width product to another area of the front surface of a holographic memory cell (HMC) without the defocusing state by providing a finely controlled moving mechanism so that a light beam scans the surface of the HMC with a specified increment. SOLUTION: A light source 300 radiates a planar wave objective beam e.g. a coherent laser beam inside a two-dimensional pattern on a spacial light modulator 302. The light beam is radiated from the original position i.e., a point A on the front surface of the spacial light modulator 302. A convex lens 304 converges the light beam on the point B of the output image on the HMC 306. An actuator 320 is connected to the spacial light modulator 302 by a shaft 322, etc., and moves the spacial light modulator 302 by a distance R1 . The point A is moved to a point A' by the distance R1 and the light beam is radiated from the point A' being the position after movement on the front surface of the spacial light modulator 302. The convex lens 304 converges the light beam on the point B' of the moved output image of the HMC 306.

公开(公告)号：JP2001101874A

公开(公告)日：2001-04-13

申请号：JP2000248122

申请日：2000-08-18

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAMPBELL SCOTT PATRICK

IPC: G03H1/16 ,  G02B27/44 ,  G11B7/0065 ,  G11C13/04

Abstract: PROBLEM TO BE SOLVED: To provide a method to use a Talbot effect for a near-field without having lenses of repeating image planes of a periodic structure. SOLUTION: The periodic phase structure of the plane having a holograph system is mapped to an input amplitude data plane. Coherent light is passed through a lens array and is made incident on a spatial optical modulator by the Talbot effect, by which input data is imparted to the holograph system. This lens array is arranged at the spatial optical modulator in such a manner that the phase image structure is self-imaged to the input amplitude data structure within a Fresnel region.

公开(公告)号：JPH11242424A

公开(公告)日：1999-09-07

申请号：JP32117298

申请日：1998-11-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAMPBELL SCOTT PATRICK ,  CURTIS KEVIN RICHARD ,  WILSON WILLIAM L

IPC: G02B5/32 ,  G03H1/22 ,  G03H1/26

Abstract: PROBLEM TO BE SOLVED: To provide a device and method which generates a light beam in a holographic storage system like, specially, a phase correlation multiplexing(PCM) holographic storage system. SOLUTION: The system consists of a generation source 264 which generates at least one HOE reference beam, a generation source which generates at least one HMC object beam, and at least one data storage device; and a holographic optical element(HOE) restructures an HMC reference beam and projects the HMC reference beam from there in response to the irradiation of the holographic optical element with the HOE reference beam and at least one hologram of the data-coded HMC object beam of the HMC reference beam is stored in the data storage device by phase correlation multiplexing technology in response to interference with the data-coded HMC object beam in a location in the data storage device.