Patent ID: 9081187
Filing Date: 2015-07-14
Classification: G01B,G01N,G02B

Abstract:
1. A multiple parallel confocal system comprising: a light source for irradiating light; a relay lens unit through which the light traveling toward a measuring object or the light reflected from the measuring object is passed, the relay lens unit having one or more lens for focusing the light irradiated from the light source; a multiple optical probe having a microlens array on which a plurality of microlenses is arranged, the microlenses into which the focused light through the relay lens unit is incident; and a photo detector for detecting the incident light reflected from the measuring object and passed through the microlenses and the relay lens unit, wherein a working distance between each microlens and the measuring object is increased, and a back focus determined by the focal distance of each microlens and the working distance between the microlens and the measuring object and a focus of the relay lens unit are located on the same plane, the back focus being calculated by the following expression: wherein f denotes the focal distance of each microlens and f+x denotes the distance between each microlens and the measuring object, and wherein an aperture is disposed on a focal plane where the focuses of the relay lens unit and the back focuses of the microlenses meet, the aperture having pinholes formed thereon.