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Range finder

  • US 8,477,290 B2
  • Filed: 06/10/2010
  • Issued: 07/02/2013
  • Est. Priority Date: 06/22/2009
  • Status: Active Grant
First Claim
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1. A distance measuring apparatus comprising:

  • a light source that emits light from a light-emitting portion by making a divergent angle of the light larger in a transversal direction of the light-emitting portion than in a longitudinal direction of the light-emitting portion, the light-emitting portion having a linear shape;

    an objective lens that projects the light onto a target object and converges reflection light reflected from the target object;

    a partial reflection member that is disposed between the light source and the objective lens and has a partial reflection surface composed of a transmitting area transmitting light emitted from the light source and a receiving area reflecting reflection light reflected from the target object and converged by the objective lens; and

    a photodetector that detects the reflection light reflected by the receiving area of the partial reflection surface;

    wherein the light source and the partial reflection member are disposed with respect to each other such that the longitudinal direction of the light-emitting portion is disposed substantially perpendicular to a longitudinal direction of the transmitting area as seen along an optical axis.

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