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Axially condensed beams exhibit properties suitable for laser micro-fabrication.The influence of axicon tilt was examined when an axially condensed beam was formed using an axicon. For both types of axicons, conical shape glass lens and binary diffractive optical element (DOE), the ideal axially condensed beam proalignment. However, with the conical shape glass axicon, the symmetry axis of the cone and the undersurface should be orthogonal within an angle error margin of 1', for axially condensed beam generation. This is the first report to present laser drill performance using a DOE axicon.

In order to support the manufacturing operations interactively, we develop monocular video see-through head mounted display (HMD) as a human interface. The operating instructions are programmed according to the state of the object and the work situation, and presented to a worker through HMD. The presentation image is a synthetic image of the operating instructions drawn by the computer graphics (CG) on the real image captured by the camera. The worker can perform the task while watching those operating instructions. At that time, because of the worker equips the monocular video see-through HMD, she/he watches the object directly by one eye, and watches the image of object through HMD by another eye. In order to work efficiently in such a situation, it is preferable that the worker has similar depth perception compared with the state that HMD is not equipped. Therefore, it is necessary to evaluate the depth perception of the worker equipped with the monocular video see-through HMD. In this paper, monocular video seethrough HMD for manufacturing support is examined, and, as a result, two prototype devices are proposed. The experimental evaluation results of the depth perception using those devices are reported.