Structured light projection system

A structured light projection system comprising:

• a substrate of non-semiconductor material having an installation surface;
• a semiconductor laser chip, configured to generate at least one beam, and disposed on the installation surface and having a first optical axis;
• a first optical module, disposed on a transmission path of the at least one beam, and having a second optical axis and comprising an optical lens having a light exit surface, wherein there is no air gap between the optical lens and the semiconductor laser chip;
• and
• a second optical module, disposed on the first optical module and having a third optical axis, wherein the second optical module comprises a hollow case and at least one diffractive optical element disposed on the transmission path of the at least one beam and converting the at least one beam into a structured light,
• wherein the first optical module is accommodated in the hollow case, and a light beam transmitted along and emitted from the first optical axis is then transmitted along the second optical axis and the third optical axis in sequence.