| 摘要 |
<p>A laser light beam generating apparatus includes at least one light beam source (11), a resonator (13) and an optical system (20). The resonator (13) generates a type II second harmonic laser light beam. The resonator has a first reflector (14R), a second reflector (18R), a laser medium (16) provided between the first (14R) and second (18R) reflectors and irradiated a light beam emitted from the light beam source (11) through the first reflector (14R) and a non-linear optical crystal element (17) provided between the laser medium (16) and the second reflector (18R). The optical system radiates the type II second harmonic laser light beam emitted from a virtual luminance point (O) of the resonator to a conjugate point. In this laser light beam generating apparatus, with an effective length L of the resonator (13), an effective distance Le from the resonator (13) to the conjugate point is set to that Le = (m + 1/2)L where m is an integer. <IMAGE></p> |
