| CPC G02B 6/3688 (2013.01) [B23K 26/0736 (2013.01); B23K 26/18 (2013.01); B23K 26/324 (2013.01); G02B 6/3636 (2013.01)] | 21 Claims |
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1. A method of bonding an optical element to a substrate, the method comprising:
electrostatically affixing at least one optical element to a surface of the substrate; and
directing a laser beam into the at least one optical element, wherein:
a material of the at least one optical element has an optical element change temperature, which is a melting point of the material of the optical element when it is fabricated from a crystalline material and a softening point of the material of the optical element when it is fabricated from an amorphous material;
a material of the substrate has a substrate change temperature, which is a melting point of the substrate material when it is fabricated from a crystalline material and a softening point of the substrate material when it is fabricated from an amorphous material;
the laser beam heats an interface between at least one optical element and the substrate to a temperature that is higher than a lowest temperature of the optical element change temperature and the substrate change temperature, thereby forming a bond between at least one optical element and the substrate at a bond area, and
the laser beam has a fluence that does not modify the substrate at regions of the substrate that are outside of a contact area of the substrate, the contact area of the substrate being in direct contact with the at least one optical element, wherein the laser beam is an astigmatically shaped laser beam.
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