Patent ID: 8773375

Claim:
A portable optical touch system, comprising: a first image sensing module, comprising a first optical lens set, a first housing and a first image sensor disposed in the first housing, wherein the first housing comprises a first transparent part such that the first image sensor acquires images through the first transparent part; a second image sensing module, comprising a second optical lens set, a second housing having a second transparent part and a second image sensor disposed in the second housing, wherein the second housing comprising a second transparent part such that the second image sensor acquires images through the second transparent part, wherein a field of view of the first image sensing module and a field of view of the second image sensing module are partially overlapped and the partially overlapped field of views is for defining a touch region; a length-adjustable connecting device connecting the first image sensing module and the second image sensing module, and connected to the first housing and the second housing, wherein the length-adjustable connecting device adjust a distance between the first image sensing module and the second image sensing module; a communication interface; and a processing circuit for calculating a position of an object in the touch region according to images of the object acquired by the first image sensing module and the second image sensing module, and for outputting information of the position through the communication interface.