Hamamatsu-photonics K.k.

Shingo Oishi

Kenshi Fukumitsu

Shinichiro Aoshima

Masatoshi Fujimoto

Hironori Takahashi

Koei Yamamoto

Yoichi Kawada

Haruyasu Ito

Shigeru Sakamoto

Hiroshi Saito

Toshiharu Moriguchi

The device includes a spatial light modulation section having a phase modulation plane to which laser light Lin a wavelength region longer than an ultraviolet region is input, and on which a phase of the laser light Lis modulated at each of a plurality of two-dimensionally arrayed regions, to generate modulated laser light L, a wavelength conversion section having a light incident plane which receives the modulated laser light Loutput from the spatial light modulation section, and converting a wavelength of the modulated laser light Linto a wavelength in the ultraviolet region, and an image transfer optical system coupling the phase modulation plane of the spatial light modulation section and the light incident plane of the wavelength conversion section, so as to be optically conjugate systems to each other.

Wavelength conversion-type spatial light modulation device

The present invention provides an optical amplifying device which can be easily downsized, increased in output, and stabilized. An optical amplifying deviceA includes an optical amplifierA and an energy supplier. The optical amplifierA includes an optical amplifying mediumand a transparent medium. The energy suppliersupplies excitation energy (for example, excitation light) to the optical amplifying medium. The optical amplifying mediumis supplied with the excitation light to amplify light and output it. To-be-amplified light passes through the transparent mediumin the optical amplifying mediuma plurality of times. The transparent mediumcan propagate the to-be-amplified light, for example, zigzag inside.

Optical amplifying device

A cylindrical lens () diverges a laser beam (L) in the Y-axis direction (i.e., within the YZ plane) but neither diverges nor converges it in the X-axis direction (i.e., within the ZX plane). An objective lens () converges the laser beam (L) emitted from the cylindrical lens () into a point Pin the Y-axis direction and into a point Pin the X-axis direction. A pair of knife edges () adjust the divergence angle (&#x3b8;) of the laser beam (L) incident on the objective lens () in the Y-axis direction. As a consequence, the cross section of the laser beam (L) becomes an elongated form extending in the Y-axis direction at the point Pwhile the maximum length in the Y-axis direction is regulated. Therefore, locating the point Pon the front face of a work (S) can form an elongated working area extending in the Y-axis direction by a desirable length on the front face of the work (S).

Laser beam working machine

A cylindrical lens () diverges a laser beam (L) in the Y-axis direction (i.e., within the YZ plane) but neither diverges nor converges it in the X-axis direction (i.e., within the ZX plane). An objective lens () converges the laser beam (L) emitted from the cylindrical lens () into a point Pin the Y-axis direction and into a point Pin the X-axis direction. As a consequence, the cross section of the laser beam (L) becomes elongated forms extending in the X- and Y-axis directions at the points P, P, respectively. Therefore, when the points P, Pare located on the outside and inside of the work (S), respectively, an elongated working area extending in the Y-axis direction can be formed in a portion where the point Pis positioned within the work (S).

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Hamamatsu, Japan

Shingo Oishi