A cylindrical lens having a refractive optical element and a diffractive optical element is provided. The cylindrical lens can be fabricated cost effectively and precisely, and optical aberrations and defects in semiconductor diode laser arrangements can be corrected. The diffractive optical element can include various segments.

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> Device with ESD protection utilizing a shorting material between electrical pads or leads which are shorted then unshorted by severing the shorting material and then recreating the short by reapplying the shorting material

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