公开(公告)号：EP0876586A4

公开(公告)日：2000-01-19

申请号：EP97905575

申请日：1997-01-22

Applicant: ADVANCED OPTICAL TECH INC

Inventor： RAMER DAVID P ,  RAINS JACK C JR

IPC: G01C1/00 ,  G01B11/26 ,  G01S3/783 ,  G01S5/16 ,  G01S7/481 ,  G01S17/42 ,  G01S17/66 ,  G01C21/00

CPC classification number: G01S17/42 ,  G01S3/7835 ,  G01S5/16 ,  G01S5/163 ,  G01S7/4816 ,  G01S17/66

Abstract: A quadrant light detector (10) that employs the concept of constructed occlusion to improve its accuracy and by incorporating baffles (28) within the design to improve its detection response to incoming light (11) having an incidence angle near the horizon, and to divide a diffusely reflective cavity (16) into quadrants. The quadrant detector (10) is able to determine the direction, or azimuth and elevation, to the light source anywhere within a sector of a hemisphere or a sphere.

公开(公告)号：AU3545999A

公开(公告)日：1999-10-18

申请号：AU3545999

申请日：1999-03-24

Applicant: ADVANCED OPTICAL TECH INC

Inventor： RAMER DAVID P ,  RAINS JACK C JR ,  GREEN ALBERT ,  PHILLIPS E ALAN ,  REIM JOHN F

IPC: G01J1/04 ,  G01J1/06 ,  G01J5/08 ,  G01B11/00 ,  F21V7/14

Abstract: Many applications of radiant energy transducer systems call for specific performance characteristics over desired fields of view or footprints on identified surfaces. Constructive occlusion utilizes a mask sized and positioned to occlude an active optical area, such as an aperture of a diffusely reflective cavity, so as to provide a tailored performance characteristic. Use of principles of constructive occlusion alone or in combination with several other techniques enable tailoring of the illumination distribution or the sensitivity profile of a radiant energy transducer system to meet the demands of specific applications. One mechanism used to further tailor performance involves a non-diffuse reflective shoulder along a peripheral section of the mask and cavity type system. Another technique involves using a retro-reflective surface, for example along a portion of the periphery of the system, to limit the angular field of view and to redirect light back into the system for emission within the desired field. Another technique involves use of a reflective wall along one side of the system, to limit the field of view to angles on the opposite side of the axis of the mask and cavity configuration.

公开(公告)号：AU9688898A

公开(公告)日：1999-05-10

申请号：AU9688898

申请日：1998-10-06

Applicant: ADVANCED OPTICAL TECH INC

Inventor： RAMER DAVID P ,  GREEN ALBERT ,  PHILLIPS E ALAN ,  RAINS JACK C JR ,  REIM JOHN F

IPC: F21V8/00 ,  G02B6/00 ,  G02B6/26 ,  F21V7/04 ,  G02B6/04

Abstract: A conical deflector receives light from a source through an opening at the narrow end of the cone. In one embodiment, an optical fiber bundle supplies light directly into the cone. In another embodiment, the conical deflector receives light via an optical integrating cavity. A substantial portion of the inner surface of the cones has a specular reflectivity. The entire surface may be uniformly specular (e.g., highly specular). Alternatively, one or more sections of the inner walls of the cone may have a diffuse reflectivity or a different degree of specular reflectivity (e.g., quasi-specular). The deflector is dimensioned relative to a narrow, desired field of view and the light source to deflect light that would otherwise pass out of the desired field of view, so as to efficiently illuminate the desired field of view. The conical deflector provides a substantially uniform light intensity distribution over the desired field of view.

公开(公告)号：EP0876583A4

公开(公告)日：2000-01-19

申请号：EP97903061

申请日：1997-01-22

Applicant: ADVANCED OPTICAL TECH INC

Inventor： RAMER DAVID P ,  WATSON HAROLD E ,  RITTER MICHAEL P ,  EPLING BOBBY L ,  SCHMITT MARK G ,  RAINS JACK C JR

IPC: G01B11/00 ,  G01J1/04 ,  G01J1/06 ,  G01J1/42 ,  G01J5/08 ,  G01S5/16 ,  G01S7/481 ,  G01S17/42 ,  G01S17/66 ,  G01C21/00

CPC classification number: G01S7/4816 ,  G01J1/0271 ,  G01J1/04 ,  G01J1/0437 ,  G01J1/0474 ,  G01J1/06 ,  G01J1/4228 ,  G01J5/08 ,  G01J2001/0481 ,  G01S5/16 ,  G01S5/163 ,  G01S17/42 ,  G01S17/66

Abstract: An optical position tracking system that tracks the position of objects, using light intensity and/or frequency with the application of geometry and ratios of detector responses, is provided, having light distributing and light detecting components (59) that employ the concepts of constructive occlusion and diffuse reflection. Diffusely reflective cavities (16), masks (M) and baffles (51) are used to improve certain radiating characteristics of the distributing components (59) and certain response characteristics of the detecting components (59), to tailor the radiation and detection profiles thereof, including them substantially uniform for all angles within a hemispheric area which the distributing and detecting components (59) face. The distributing and/or detecting components (59) are partitioned with specially configured baffles (51). A partitioned distributor has distinct emission sections where the sections can emit spectrally-different or distinguishable radiation. A partitioned detector has distinct detection sections where the sections can detect radiation from different directions.