[Clinical observation on photoelectric treatment instrument combined with acupuncture for treatment of simple obesity].

Objective: To observe therapeutic effect of photoelectric treatment instrument on simple obesity.

Methods: Sixty cases of simple obesity were randomly divided into two groups, 30 cases in each group. The treatment group were treated with photoelectric treatment instrument combined with acupuncture, i.

Synthesis of multiple collinear helical modes generated by a phase-only element.

Phase-only elements are generally more desirable than complex-amplitude-modulated elements not only because of the higher diffraction efficiency but the readier implementation and fabrication. A novel iterative algorithm is proposed for generating multiple helical modes by a single phase-only element. A superposition of four helical modes is demonstrated experimentally by using a spatial light modulator.