Title:
OPTICAL BIOLOGICAL MEASURING APPARATUS
Document Type and Number:
Japanese Patent JP3241516
Kind Code:
B2
Abstract:
PURPOSE: To measure diffuse transmission reflected light from a wide irradiated area simultaneously by sending a beam on a point of an object to be measured and using a two-dimensional detector.
CONSTITUTION: The decreasing rate of a luminous energy compensating filter 10 decreases from the center of the filter 10 radially and concentrically outward. The filter 10 has a bore at the center of concentric circles having each light decreasing rate, and an optical fiber 12 is passed through the bore and is fixed to the filter 10 using a shading ring 14. A near-infrared beam travels through the optical fiber 12 and irradiates the object. The diffuse transmission reflected light from the object travels through the filter 10 and is detected by a two-dimensional detector 18 facing the filter 10.
Inventors:
Yoshio Tsunazawa
Application Number:
JP33004093A
Publication Date:
December 25, 2001
Filing Date:
November 30, 1993
Export Citation:
Assignee:
Medical Research Welfare Equipment Research Institute
International Classes:
G01N21/27; A61B5/145; A61B5/1455; A61B10/00; G01N21/17; G01N21/49; (IPC1-7): A61B10/00; A61B5/145; G01N21/27; G01N21/49
Attorney, Agent or Firm:
Shigeo Noguchi
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