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Patent Searching and Data


Title:
DISPLACEMENT MEASURING DEVICE FOR MOVABLE OBJECT
Document Type and Number:
Japanese Patent JPH07167676
Kind Code:
A
Abstract:

PURPOSE: To provide a compact measuring device which cooperates with a scale element mechanically installed in a movable body so as to measure displacement of the movable object.

CONSTITUTION: A scale element 13 is provided with at least one track 15 consisting of a series of plural lattice thin bars positioned across the moving direction of an object. A measuring device 1 is provided with a light source 3, a detector 7, and a reflection optical system including at least one reflection collimator element 5. The optical system guides the light from the light source 3 to the scale element 13, while the light is converted into thin long light beams uniformly in a cross section face vertical to the lattice thin bars.


Inventors:
YOHANESU UIRUHERUMUSU DOROTEUS
YOSEFUSU YOHANESU MARIA BURATS
YOANESU GUREGORIUSU BUREMEERU
Application Number:
JP21890194A
Publication Date:
July 04, 1995
Filing Date:
September 13, 1994
Export Citation:
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Assignee:
PHILIPS ELECTRONICS NV
International Classes:
G01D5/30; G01D5/347; (IPC1-7): G01D5/30
Attorney, Agent or Firm:
杉村 暁秀 (外5名)