Hamamatsu-Photonics K.k.

Kazuhiko Wakamori

Hironori Takahashi

Musubu Koishi

Akira Takeshima

Hiroshi Tsuchiya

In this system, reflected light from an electro-optic probe is detected by a photodetector, and only a voltage signal of a frequency which is an integral multiple of the fundamental frequency of the output voltage from the photodetector is detected. The frequency characteristics of the output voltage from the photodetector can be measured at a high speed and a high accuracy.

Voltage measuring using electro-optic material's change in refractive

An electrooptic probe for measuring voltage of an object without contact with the object. The electrooptic probe according to the present invention includes an electro-optic material having a refractive index to light that varies in accordance with an electric field, a conductive reflecting film for reflecting an incident beam transmitted through the electro-optic material, fixed to an end face of the electro-optic material facing the object to be measured, a transparent electrode fixed on the other end face of the electro-optic material, and a high permittivity film fixed on an end face of the reflecting film facing the object to be measured.

Electrooptic probe for measuring voltage of an object having a high

A system disclosed in the present invention comprises a video A/D converter for converting an analog video signal to a digital video signal, a sync separator for detecting a sync signal period of the analog video signal, an invalid data stream detector for detecting an invalid data stream of a digital sub-signal having the invalid data stream added thereto at a predetermined period, a selector for selecting the bits of the digital sub-signal, the digital video signal and a sync pattern in accordance with the detection outputs of the invalid data stream detector and the sync separator, and an encoder for converting the output of the selector to a serial signal.

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Hamamatsu, Japan

Kazuhiko Wakamori