Patent ID: 7567350
Filing Date: 2009-07-28
Classification: G01B

Abstract:
1. An apparatus for measuring displacement of a moving object, comprising: light emitting means for providing a light source with multiple wavelengths or a spectrum; light dispersing means for receiving light from the light emitting means and respectively focusing rays with different wavelengths from the light source into different focal points with different intervals, and when the moving object is moving within a dispersing range of the focal points, the light dispersing means provides rays with different wavelengths returned by the moving object; and wavelength measuring means for measuring the wavelengths of the rays returned when the moving object is moving within the dispersing range of the focal points, such that the displacement of the moving object is learned from variation of the measured wavelengths of the returned rays, wherein the light emitting means comprises a light emitting component for providing the light source, and a penetrating component is provided on a surface of the light emitting component where the light source is not provided, for providing a transmission channel for the rays that are returned by reflection or dispersion when the moving object is moving within the dispersing range of the focal points.