Optical Apparatus for Measuring a Physiological Property of a Body Part and Method Therefore
First Claim
1. An optical measurement apparatus comprising:
- an optical system comprising;
a source arranged to emit, when in use, a probe beam, the optical system being arranged to direct, when in use, the probe beam to a location to be measured; and
a detector arranged to receive, when in use, a reflected beam from the location to be measured;
whereinthe optical system has a receiving numerical aperture associated therewith, the optical system being further arranged so that, when in use, the reflected beam has a cone angle corresponding to a reflected beam numerical aperture; and
the receiving numerical aperture is greater than the reflected beam numerical aperture.
1 Assignment
0 Petitions
Accused Products
Abstract
An optical measurement apparatus comprises an optical system (100). The optical system (100) includes a source (102) and a detector (112). The source, when in use, emits a probe beam (116) and the optical system is arranged to direct the probe beam (116) to a location to be measured (114). The detector (112) is arranged to receive a reflected beam (120) from the location to be measured (114).The optical system (100) has a receiving numerical aperture associated therewith and is also arranged so that the probe beam (116) has a probe cone angle corresponding to a probe numerical aperture. The receiving numerical aperture is greater than the probe numerical aperture. Alternatively or additionally, the optical system (100) is arranged to apply a magnification ratio between the detector (112) and the location to be measured (114) so as to minimise deviation of the reflected beam from a receiving axis (119) of the optical system (100).
-
Citations
25 Claims
-
1. An optical measurement apparatus comprising:
-
an optical system comprising; a source arranged to emit, when in use, a probe beam, the optical system being arranged to direct, when in use, the probe beam to a location to be measured; and a detector arranged to receive, when in use, a reflected beam from the location to be measured;
whereinthe optical system has a receiving numerical aperture associated therewith, the optical system being further arranged so that, when in use, the reflected beam has a cone angle corresponding to a reflected beam numerical aperture; and the receiving numerical aperture is greater than the reflected beam numerical aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 22, 23)
-
-
15. A method of optically measuring a location to be measured, the method comprising:
-
emitting a probe beam; directing the probe beam to the location to be measured; providing an optical system capable of receiving a reflected beam from the location to be measured, the optical system having a receiving numerical aperture associated therewith;
whereinthe reflected beam has a cone angle corresponding to a reflected beam numerical aperture; and the receiving numerical aperture is greater than the reflected beam numerical aperture.
-
-
16. An optical measurement apparatus comprising:
-
an optical system comprising; a source arranged to emit, when in use, a probe beam, the optical system being arranged to direct, when in use, the probe beam to a location to be measured; a detector arranged to receive, when in use, a reflected beam from the location to be measured; and a receiving axis;
whereinthe optical system is arranged to apply, when in use, a magnification ratio between the detector and the location to be measured so as to minimise, when in use, deviation of the reflected beam from the receiving axis. - View Dependent Claims (17, 18, 19, 20, 21, 24)
-
-
25. A method of optically measuring a location to be measured, the method comprising:
-
emitting a probe beam; directing the probe beam to the location to be measured; using an optical system having a detector to receive a reflected beam from the location to be measured, the optical system having a receiving axis; and applying a magnification ratio between the detector and the location to be measured so as to minimise deviation of the reflected beam from the receiving axis.
-
Specification