Asia Optical Co., Ltd.

Shou-Qing Yang

Yin-Long Luo

Song Li

Hua-Tang Liu

Han Lu

Pie-Yau Chien

Hui-Qing Chen

Peng-Fei Song

Liang Li

Hai-Hua Chen

A driving device including a light emitter, a biasing circuit, a light receiver, an automatic control system, and an alternating current (AC) path is disclosed. The light emitter generates an optical signal. The biasing circuit generates a driving signal to activate the light emitter such that the light emitter operates in a working range. The light receiver detects the output power of the optical signal for generating a corresponding electrical signal. The automatic control system adjusts the driving signal according to the corresponding electrical signal such that the output power of the optical signal approaches a preset value. The AC path is coupled between the light emitter and an external signal source for receiving at least one AC modulated signal such that the light emitter generates at least one modulated optical signal.

Driving device and method

A phase measurement method is disclosed, which includes inputting a predetermined voltage to the photodiode; receiving an optical signal and transforming into an electrical signal; generating a sampled signal with a signal transforming process; determining whether the amplitude value of the sampled signal in a predetermined range or not; if the amplitude of the sampled signal is not in the predetermined amplitude range, adjusting the predetermined voltage and receiving the optical signal and judging again until the amplitude value falls into the predetermined amplitude range; if the amplitude of the sampled signal is in the predetermined amplitude range, calculating the first phase value; and judging whether the predetermined voltage adjusted or not. If the predetermined voltage has been adjusted, calculating the compensating phase value and the second phase value in accordance with the adjusted predetermined voltage.

Phase measurement method and application thereof

A laser distance-measuring device includes a laser-transmitting portion, a laser-receiving portion, a coupling portion, an inclination-measuring portion, a signal-processing portion, and a display. The laser-transmitting portion emits a laser beam, and the laser-receiving portion receives the laser beam. The coupling portion interconnects the laser-receiving portion and the signal-processing portion. The inclination-measuring portion detects an inclination angle of the laser beam. The signal-processing portion processes the signals received from the laser-receiving portion and the inclination-measuring portion and sends the result to the display. The display receives and displays the result of processing by the signal-processing portion.

Laser distance-measuring device

Growing community of inventors

Hang-Zhou, China

Shou-Qing Yang