Patent ID: 9696144
Date: 2017-07-04
CPC Classifications: G01B,G01J,G01N

Claim:
1. A three-dimensional shape measurement apparatus for measuring a shape of a measurement object using an interference light, the apparatus comprising: a light source for emitting light; a light divider for reflecting the light emitted from the light source or transmitting a light reflected by the measurement object; a lens unit for focusing the light reflected by the light divider onto the measurement object; a light detector for detecting the light reflected from the measurement object; a light adjuster arranged on a light path between the light source and the light divider and configured to interrupt the light being emitted from a central area of the light source to reduce interference of light occurring in the lens unit; and a subsidiary light adjuster arranged on the light path between the light adjuster and light divider and configured to interrupt a part of the light that penetrated the light adjuster to adjust the light entering the measurement object according to a magnification ratio of the lens unit; wherein the light adjuster comprises a main body provided with a transmitter for transmitting light, and a light diaphragm arranged inside the transmitter and configured to interrupt light; wherein the light path where the light emitted from the light source penetrates is limited to an area between an exterior surface of the transmitter and an exterior surface of the light diaphragm, so as to reduce the light that is emitted from the central area of the light source and enters the measurement object; wherein the subsidiary light adjuster is provided with an aperture for transmitting light, and wherein the aperture has a same central axis as the transmitter of the light adjuster and the aperture has a smaller outer diameter than the transmitter of the light adjuster such that a portion of surrounding light that penetrated the light adjuster is additionally interrupted.