Optical measurement apparatus

Patent metadata

Field	Value
Publication number	US-9500520-B2
Application number	US-201214378002-A
Country	US
Kind code	B2
Filing date	Jul 30, 2012
Priority date	Jul 30, 2012
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

An optical measurement apparatus includes: a hollow cylindrical member having one plane with a first opening and the other plane with a second opening; a rotation mechanism for rotating the cylindrical member about a first axis; a support unit for arranging a light source at a measurement position which is on the first axis and from which the emitted light enters the cylindrical member through the first opening; a first reflection unit arranged inside the cylindrical member for reflecting the light emitted from the light source and entering through the first opening; a second reflection unit for reflecting the light inside the cylindrical member and propagating the light through the second opening along the first axis to the outside of the cylindrical member; and at least one third reflection unit for causing the light reflected by the first reflection unit to be incident on the second reflection unit.

First claim

The invention claimed is:

1. An optical measurement apparatus for detecting light emitted from a light source in relation to each of radiation angles of the light source, comprising:
a hollow cylindrical member comprising a pair of planes, a first plane comprising a first opening thereon and a second plane comprising a second opening thereon;
a rotation mechanism including a roller rotationally supporting the cylindrical member for rotating the cylindrical member about a first axis which is a longitudinal central axis of the cylindrical member;
an optical receiver unit arranged on the first axis;
a support unit for arranging the light source at a measurement position which is located on the first axis and from which the emitted light enters the cylindrical member through the first opening;
a first reflection unit, arranged inside the cylindrical member and at least partially mounted on an inner wall of the cylindrical member, for reflecting the light emitted from the light source and entering through the first opening;
a second reflection unit at least partially mounted on an inner wall of the cylindrical member for reflecting the light inside the cylindrical member and propagating the light through the second opening along the first axis to the outside of the cylindrical member; and
at least one third reflection unit at least partially mounted on an inner wall of the cylindrical member for causing the light reflected by the first reflection unit to be incident on the second reflection unit.

2. The optical measurement apparatus according to claim 1 , wherein the support unit is configured rotate the light source about a second axis orthogonal to the first axis.

3. The optical measurement apparatus according to claim 1 , wherein the support unit includes:
an arm for supporting a plurality of light sources including the light source and additional one or more light sources; and
means for revolving the arm to locate the plurality of light sources at the measurement position in turn.

4. The optical measurement apparatus according to claim 1 , wherein the third reflection unit includes a plurality of reflection units arranged to direct the light from the light source in a direction orthogonal to the first axis.

5. The optical measurement apparatus according to claim 4 , wherein the third reflection unit is configured to cause the light from the light source to at least partially revolve around the first axis.

6. An optical apparatus adapted to an optical measurement apparatus that detects light emitted from a light source in relation to each of radiation angles of the light source, comprising:
a hollow cylindrical member comprising a pair of planes, a first plane comprising a first opening thereon and a second plane comprising a second opening thereon;
a rotation mechanism including a roller rotationally supporting the cylindrical member for rotating the cylindrical member about a first axis which is a longitudinal central axis of the cylindrical member;
a support unit for arranging the light source at a measurement position which is located on the first axis and from which the emitted light enters the cylindrical member through the first opening;
a first reflection unit, arranged inside the cylindrical member and at least partially mounted on an inner wall of the cylindrical member, for reflecting the light emitted from the light source and entering through the first opening;
a second reflection unit at least partially mounted on an inner wall of the cylindrical member for reflecting the light inside the cylindrical member and propagating the light through the second opening along the first axis to the outside of the cylindrical member; and at least one third reflection unit at least partially mounted on an inner wall of the cylindrical member for causing the light reflected by the first reflection unit to be incident on the second reflection unit.

7. The optical apparatus according to claim 6 , wherein the support unit is configured to rotate the light source about a second axis orthogonal to the first axis.

8. The optical apparatus according to claim 6 , wherein the support unit includes:
an arm for supporting a plurality of light sources including the light source and additional one or more light sources; and
means for revolving the arm to locate the plurality of light sources at the measurement position in turn.

9. The optical apparatus according to claim 6 , wherein the third reflection unit includes a plurality of reflection units arranged to direct the light from the light source in a direction orthogonal to the first axis.

10. The optical apparatus according to claim 9 , wherein the third reflection unit is configured to cause the light from the light source to at least partially revolve around the first axis.

Assignees

• Ohkubo Kazuaki
• Shiraiwa Hisashi
• Otsuka Denshi Kk

Inventors

• Ohkubo Kazuaki
• Shiraiwa Hisashi

Classifications

• G01J1/0403 Primary

  Mechanical elements; Supports for optical elements; Scanning arrangements · CPC title

• G01J1/0488

  with spectral filtering · CPC title

• G01J1/0223 Primary

  Sample holders for photometry · CPC title

• G01J2001/4247

  for testing lamps or other light sources · CPC title

• G01J1/4257

  applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam (monitoring arrangements for lasers in general H01S3/0014) · CPC title