Electric heating – Metal heating – By arc
Reexamination Certificate
2005-08-02
2005-08-02
Johnson, Jonathan (Department: 1725)
Electric heating
Metal heating
By arc
C219S121690
Reexamination Certificate
active
06924457
ABSTRACT:
In a laser processing method for accurately forming a convexo-concave structure on the surface of a glass substrate, a periodic optical intensity distribution of a laser beam is obtained by an interference between diffracted light beams of +1 degree and −1 degree emitted from a phase mask, onto which the laser beam is irradiated, in the vicinity of the emission side of the phase mask, and a glass substrate, on which a thin film is formed, is set in the area where the periodic optical intensity distribution is provided. As a result, the thin film is evaporated or ablated depending on the periodic optical intensity, thereby a diffraction grating, which has the same period as that of the varying optical intensity, is formed on the glass substrate.
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Koyama Tadashi
Tsunetomo Keiji
Johnson Jonathan
Merchant & Gould P.C.
Nippon Sheet Glass Co. Ltd.
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