Abstract: A laser crystallization method in which an amorphous silicon thin film 2 formed on a substrate 1 is irradiated with a laser beam, the method including the steps of providing the amorphous silicon thin film 2 with an absorbent to form an absorbent layer 3 on the desired specific local areas of the amorphous silicon thin film 2 and laser annealing for crystallizing the specific local areas of the amorphous silicon thin film 2 by irradiating the amorphous silicon thin film 2 including the specific local areas with a semiconductor laser beam L having a specific wavelength absorbable by the absorbent layer 3 and unabsorbable by the amorphous silicon thin film 2 for heating the absorbent layer 3.

Abstract: A laser crystallization method in which an amorphous silicon thin film 2 formed on a substrate 1 is irradiated with a laser beam, the method including the steps of providing the amorphous silicon thin film 2 with an absorbent to form an absorbent layer 3 on the desired specific local areas of the amorphous silicon thin film 2 and laser annealing for crystallizing the specific local areas of the amorphous silicon thin film 2 by irradiating the amorphous silicon thin film 2 including the specific local areas with a semiconductor laser beam L having a specific wavelength absorbable by the absorbent layer 3 and unabsorbable by the amorphous silicon thin film 2 for heating the absorbent layer 3.

Abstract: The production method for an optical fiber connector includes the steps of: injecting and hardening a first resin (26) into a resin-injection portion (29) of a connector body (22), the first resin (26) being a light hardening resin or a heat hardening resin; forming a pre-lens by further injecting a second resin (27) on the hardened first resin (26), the second resin (27) being the light hardening resin or the heat hardening resin; and forming a lens by hardening the second resin (27). In this way, it is possible to provide a production method for an optical lens by which influences by volume shrinkage of a resin are decreased, a lens surface can be formed with high accuracy and the product can be made with high quality.

Abstract: An optical fiber connector (19) has a connector main body including a first pipe (20) for receiving a fiber (24) inside, and three second pipes (21a) through (21c) for receiving the first pipe (20) inside. With this arrangement, the fiber (24) can be securely held with ease at the center of the connector main body. On this account, it is possible to provide the optical fiber connector (19) in which the fiber (24) is securely held with ease at the center of the connector main body.

Abstract: An axial direction excitation type F2 laser apparatus comprises a discharge tube consisting of an insulating cylinder and metal electrodes at both ends of thereof, and a reflecting mirror or a transmitting mirror, constituting a resonator, outside the electrodes. A high voltage for pulse discharge is applied to the electrodes from a drive circuit. Total gas pressure in the discharge tube is set in a range between 10 Torr. and 100 Torr., and concentration of F2 gas to total gas in the discharge tube is set to be in a range between 0.2% and 2.0%. This low-pressure axial direction excitation type F2 laser apparatus having small size and high efficiency can be provided at a low cost.

Abstract: An optical fiber connector (19) has a connector main body including a first pipe (20) for receiving a fiber (24) inside, and three second pipes (21a) through (21c) for receiving the first pipe (20) inside. With this arrangement, the fiber (24) can be securely held with ease at the center of the connector main body. On this account, it is possible to provide the optical fiber connector (19) in which the fiber (24) is securely held with ease at the center of the connector main body.

Abstract: The production method for an optical fiber connector includes the steps of: injecting and hardening a first resin (26) into a resin-injection portion (29) of a connector body (22), the first resin (26) being a light hardening resin or a heat hardening resin; forming a pre-lens by further injecting a second resin (27) on the hardened first resin (26), the second resin (27) being the light hardening resin or the heat hardening resin; and forming a lens by hardening the second resin (27). In this way, it is possible to provide a production method for an optical lens by which influences by volume shrinkage of a resin are decreased, a lens surface can be formed with high accuracy and the product can be made with high quality.

Abstract: An axial direction excitation type F2 laser apparatus (11) comprising a discharge tube (1) consisting of an insulating cylinder and metal electrodes (2, 3) at both ends of thereof, and a reflecting mirror or a transmitting mirror constituting a resonator outside the electrodes. A high voltage for pulse discharge is applied to the discharge electrodes (2, 3) from a drive circuit. The total gas pressure in the discharge tube (1) is set in a range between 10 Torr. and 100 Torr., the concentration of F2 gas to the total gas is set to be in a range between 0.2% and 2.0%. The low-pressure axial direction excitation type F2 laser apparatus having small size high efficiency can be provided at a low cost.

Abstract: This invention relates to a lens machining device for machining a lens so that the optical characteristics of light outputted by a semiconductor laser element (10) will be adjusted to desired ones. The lens (12) to be machined is provided at one end of the element (10) and the optical characteristics of the lens (12) are measured with a wave front measuring instrument (16) through the use of the light transmitted through the lens (12). A machining laser beam is focused upon the surface of the lens (12) through a beam splitter (14). The surface of the lens (12) is machined with the laser beam while a position adjusting device (22) adjusts the relative positional relation between the surface of the lens (12) and a position where the laser beam is focused. An ultraviolet laser (18) and the position adjusting device (22) are controlled by a controlling arithmetic device (24).

Abstract: The invention counterbalances the defects of optical glass and optical plastic so as to realize a high precision aspherical processing. The optical lens 1 includes a matrix 2 of optical glass and a coating of optical resin material applied to the surface of the matrix 2. A reflective wavefront of a lens plane 4 of the optical lens 1 is measured by means of a interferometer 5. The wavefront from the interferometer 5 is monitored by a computer system 7 to provide monitoring information. The lens plane 4 is irradiated or scanned with a short wavelength, ultraviolet laser beam L in accordance with the monitoring information, whereby the lens plane 4 is processed with the ultraviolet laser beam in non-contact manner into a shape to provide a most appropriate reflective wavefront.