公开(公告)号：CA2256759A1

公开(公告)日：1997-12-18

申请号：CA2256759

申请日：1997-06-02

Applicant: LEICA INC

Inventor： LUCE DAVID A

IPC: A61B3/16

Abstract: An air pulse generator (110) for a non-contact tonometer comprises a bidirectional linear motor (124) drivably connected to a compression mechanism (114) and responsive to an applanation signal for reducing unnecessary air pulse energy delivered to an eye (2). Upon receiving the applanation signal from an applanation detector (140), a motor controller (138) reverses current flow in the coil (130) of the motor (124) to create a reverse electromagnetic force to stop generation of the air pulse. In a first embodiment, the linear motor (124) includes a moving permanent magnet armature (126) for reversibly driving the compression mechanism (114), while in a second embodiment, the linear motor (124) includes a moving coil (230) for reversibly driving the compression mechanism (214).

公开(公告)号：MX9702964A

公开(公告)日：1997-06-28

申请号：MX9702964

申请日：1995-10-13

Applicant: LEICA INC

Inventor： LUCE DAVID A ,  MILLER DONALD E

IPC: A61B3/00 ,  A61B3/10 ,  A61B3/14 ,  A61B3/15 ,  A61B3/16 ,  A61B03/14 ,  A61B03/10

Abstract: Se describe un control limitador de alineacion para llevar a cabo alineacion vertical automática de un eje de prueba en un instrumento oftálmico (10) con el centro de un ojo. El eje de prueba se asocia con medios de alineacion opticos del instrumento que se pueden mover verticalmente por un motor de elevacion controlado por un impulsor de motor de elevacion controlado por un impulsor de motor. Una palanca de mando (24) y un par de conmutadores direccionales (28a, 28b) están conectados al impulso de motor para colocacion manual del eje de prueba. Cuando el ojo se coloca dentro de un campo de vision definido por los medios opticos, el control limitador desconecta los limitadores y automáticamente señala al motor de elevacion que lleve a cabo una alineacion automática utilizando informacion de señal originada desde el medio optico.

公开(公告)号：AU669513B2

公开(公告)日：1996-06-13

申请号：AU3746193

申请日：1993-03-05

Applicant: LEICA INC

Inventor： PERCIVAL CHRISTOPHER J ,  LUCE DAVID A

IPC: G01M11/02 ,  G01N21/88

Abstract: Optical properties of a lens, including localized defects, are determined by analyzing the refracted image produced by transmitting a beam of light through an aperture and a lens to be tested. The image is reflected onto a light sensitive detecting surface. Information obtained from the light detecting surface is digitized and sent to an Image Processing Unit which calculates the optical properties of the lens. The aperture may consist of a single shaped opening or alternatively a plurality of concentric, annular rings. Correction lenses may be employed, either permanently or selectively, to alter the refracted beam before the beam intersects the detecting surface.

公开(公告)号：AT182423T

公开(公告)日：1999-08-15

申请号：AT95910119

申请日：1995-01-30

Applicant: LEICA INC

Inventor： LUCE DAVID A ,  PERCIVAL CHRISTOPHER J

IPC: G01J1/04 ,  A61B3/15 ,  G01M11/00 ,  G01M11/02 ,  H01J40/14

Abstract: A polar or vector display provides an operator of an optical instrument with a symbolic instruction regarding the direction and amount of motion required to center an optical element on a chosen path.

公开(公告)号：MX9702287A

公开(公告)日：1997-06-28

申请号：MX9702287

申请日：1995-10-13

Applicant: LEICA INC

Inventor： LUCE DAVID A ,  ZELVIN JOSEPH L

IPC: G05G9/047 ,  A61B3/00 ,  A61B3/10 ,  G06F3/033 ,  A61B03/10

Abstract: La presente invencion se refiere a una palanca de mando (31) para colocar un eje de prueba de un instrumento oftálmico con relacion a un ojo de un paciente. En una modalidad preferida, la palanca de mando (31) incluye un accionador (30) que se extiende a partir de la misma y arreglado o colocado para acoplar alternativamente un par de conmutadores de control (28a) del motor, incidiendo hasta una rotacion ligera de la palanca de mando (31) en direcciones opuestas, activando por medio de esto un dispositivo de impulso motorizado de impulso motorizado para subir y bajar el eje de prueba.

公开(公告)号：AT100295T

公开(公告)日：1994-02-15

申请号：AT89307824

申请日：1989-08-01

Applicant: LEICA INC

Inventor： LUCE DAVID A ,  KRSTANOVIC SRDJAN

IPC: A61B3/10 ,  A61B3/00 ,  A61B3/107 ,  A61B3/16

Abstract: An optical alignment system using at least one CCD array (28) for positioning an instrument in a chosen relationship to an object (20) is disclosed. Means for "electronically" aligning the optical components and providing a macro view of the object on a CRT (66) without additional illumination are also disclosed. Alignment may be achieved manually, if the operator observes the position of symbols on the CRT that move in response to movement of the instrument by the operator using a joystick (6), or automatically using information provided by the array.

公开(公告)号：AU3746193A

公开(公告)日：1993-10-05

申请号：AU3746193

申请日：1993-03-05

Applicant: LEICA INC

Inventor： PERCIVAL CHRISTOPHER J ,  LUCE DAVID A

IPC: G01M11/02

Abstract: Optical properties of a lens, including localized defects, are determined by analyzing the refracted image produced by transmitting a beam of light through an aperture and a lens to be tested. The image is reflected onto a light sensitive detecting surface. Information obtained from the light detecting surface is digitized and sent to an Image Processing Unit which calculates the optical properties of the lens. The aperture may consist of a single shaped opening or alternatively a plurality of concentric, annular rings. Correction lenses may be employed, either permanently or selectively, to alter the refracted beam before the beam intersects the detecting surface.

公开(公告)号：CA2103049A1

公开(公告)日：1993-09-14

申请号：CA2103049

申请日：1993-03-05

Applicant: LEICA INC

Inventor： PERCIVAL CHRISTOPHER J ,  LUCE DAVID A

IPC: G01M11/02 ,  G01M11/00

Abstract: Optical properties of a lens, including localized defects, are determined by analyzing the refracted image produced by transmitting a beam of light through an aperture and a lens to be tested. The image is reflected onto a light sensitive detecting surface. Information obtained from the light detecting surface is digitized and sent to an Image Processing Unit which calculates the optical properties of the lens. The aperture may consist of a single shaped opening or alternatively a plurality of concentric, annular rings. Correction lenses may be employed, either permanently or selectively, to alter the refracted beam before the beam intersects the detecting surface.

公开(公告)号：EP0695462A4

公开(公告)日：1997-12-17

申请号：EP95910119

申请日：1995-01-30

Applicant: LEICA INC

Inventor： LUCE DAVID A ,  PERCIVAL CHRISTOPHER J

IPC: G01J1/04 ,  A61B3/15 ,  G01M11/00 ,  G01M11/02 ,  H01J40/14

CPC classification number: A61B3/152 ,  G01M11/0221

Abstract: A polar or vector display (26) provides an operator of an optical instrument with a symbolic instruction regarding the direction and amount of motion required to center an optical element (16) on a chosen path.

Abstract translation: 极性或矢量显示器为光学仪器的操作者提供关于将光学元件置于所选择的路径上所需的运动的方向和量的符号指令。

公开(公告)号：CA2256759C

公开(公告)日：2003-01-28

申请号：CA2256759

申请日：1997-06-02

Applicant: LEICA INC

Inventor： LUCE DAVID A

IPC: A61B3/16

Abstract: An air pulse generator (110) for a non-contact tonometer comprises a bi- directional linear motor (124) drivably connected to a compression mechanism (114) and responsive to an applanation signal for reducing unnecessary air pulse energy delivered to an eye (2). Upon receiving the applanation signal from an applanation detector (140), a motor controller (138) reverses curren t flow in the coil (130) of the motor (124) to create a reverse electromagneti c force to stop generation of the air pulse. In a first embodiment, the linear motor (124) includes a moving permanent magnet armature (126) for reversibly driving the compression mechanism (114), while in a second embodiment, the linear motor (124) includes a moving coil (230) for reversibly driving the compression mechanism (214).