Ando Electric Company

Tomoo Ito

In a tunable filter for launching incident light from an input side optical fiber into a diffraction grating through a condenser lens and emitting emission light from the diffraction grating through the condenser lens and outputting output light of a selected wavelength through an output side optical fiber, one optical fiber common to input and output is provided between the input side optical fiber and the output side optical fiber and the condenser lens, and also optical circulator member is provided between the input side optical fiber and the output side optical fiber and the one common optical fiber.

Tunable filter

An engraving head that includes a movement mechanism for moving an engraving stylus within the body housing of the engraving apparatus is provided. The movement of the engraving stylus causes the tip of the engraving stylus to approach and recede from an engraving surface. The movement mechanism contains a movable body and a first energizing means. The movable body moves in association with a movement space member's inner circumference. The movement space member is positioned inside the body housing. The first energizing means is employed to energize the movable body in a direction away from the engraving surface. Additionally, a second energizing means serves to energize the movable body in a direction towards the engraving surface against the opposing energizing force of the first energizing means. The second energizing means may be, for example, compressed gas. As the movable body travels downward towards the engraving surface, the tip portion of the engraving stylus also approaches the engraving surface. When the energizing force of the second energizing means is released or is less than a predetermined value, the movable body and the tip portion of the engraving stylus recede from the engraving surface.

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Tokyo, Japan

Tomoo Ito