2-D mask generation by YAG laser for multiobject spectroscopy at CFHT: LAMA

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Abstract
New YAG lasers have been found as useful machines to generate 2D masks for multi-object spectroscopy. Compared to the punching technique presently under operation in some astrophysical observatories or to the C02 laser capability, the performances are higher in several ways. The cutting accuracy at the edge of slits is greatly increased and can be improved by selecting the number of loop paths. The size of conventional rectangle slits is easily controlled. Another feature of interest is that various type of curvilinear slits can be generated. Presented results have been obtained with the YAG laser machine commissioned by the Canada-France-Hawaii Telescope Corp.

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