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Patent
Mitsuboshi Diamond Industrial Co. | Date: 2014-03-20

An optical fiber includes a first optical fiber body, a second optical fiber body and a first end cap. The first optical fiber body includes a first core and a first cladding. The second optical fiber body includes a second core and a second cladding, and is joined at a first end surface thereof to a first end surface of the first optical fiber body. The first end cap has light permeability and is joined to a second end surface of the second optical fiber body. The first core is doped with a laser medium. A mass content of the laser medium in the second core is lower than that of the laser medium in the first core.


Patent
Mitsuboshi Diamond Industrial Co. | Date: 2010-01-29

A cutter with which a diagonal crack can be created without fail deeply within a brittle material substrate is provided. The cutter has such a form that two cones or truncated cones are joined through the same bottom so as to share the same rotational axis, and the circumference of the above described bottom is used as the blade edge ridge line. In addition, grooves that incline at a predetermined angle relative to the direction of the rotational axis are created around this blade edge ridge line at predetermined intervals. Furthermore, the angles between the sides of the above described two cones or truncated cones and the above described bottom are different from each other.


A scribing wheel for a brittle material includes a circumferential ridge line in which two truncated cones have connected bottoms so as to share a rotational axis. Alternating notches and protrusions are formed along the circumference ridge line. The protrusion are portions of the ridge line remaining after the ridge line is notched. The length of the notches is less than that of the protrusions so that a catch on the surface is improved while lowering the high penetrability.


Patent
Mitsuboshi Diamond Industrial Co. | Date: 2015-04-29

A groove machining head has a dust collecting hood


Patent
Mitsuboshi Diamond Industrial Co. | Date: 2015-03-20

A first head unit

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