A laser system including a laser source that generates a laser beam and an optical switch that receives the laser beam and selectively sends the laser beam to either a fast path or a slow path, wherein in the fast path the laser beam has a first F/# and in the slow path the laser beam has a second F/# that is higher in value that of the first F/#. The laser system further including an afocal optical system that is in the slow path and receives the laser beam from the optical switch and an x-y scanner that receives either a first laser beam from the slow path or a second laser beam from the fast path. The laser system including a scan lens system that receives a scanning laser beam from the x-y scanner and performs a z-scan for the scanning laser beam only in the case wherein the scanning laser beam is generated from the laser beam in the fast path. The laser system further including an aspheric patient interface device that receives a laser beam from the scan lens system.

An optical scanning unit steers a light beam emitted from a laser diode in the main scanning direction by a polygon mirror. The laser diode, a collimator lens, an aperture, a first lens, the polygon mirror, and a condensing lens are sequentially placed in the optical system of the optical scanning unit. The laser diode emits a light beam in which divergent angles in intersecting two directions are different from each other. The direction in which the light beam divergent angle is large is aligned with the sub-scanning direction, and the direction in which the light beam divergent angle is small is aligned with the main scanning direction. The first lens has a first function to condense a beam in the sub-scanning direction and a second function to diffuse a beam in the main scanning direction.

An optical scanning device (15) includes a reference light guide part (50); a sub-light guide part (40); a reference holding structure (53) which includes a reference reception part (55) configured so as to be in contact with the reference lens (52) deflected in a sub-scanning direction; a sub-holding structure (45) which includes a sub-reception part (45) configured so as to be in contact with the sub-lens (42) deflected in the sub-scanning direction, wherein a deflection direction of the reference lens (52) coincides with a deflection direction of the sub-lens (42), and when it is assumed that the reference lens (52) and the sub-lens (42) are not deflected, an absolute value of a smallest distance between the sub-reception part (45) and the sub-lens (42) is set to be equal to or larger than an absolute value of a smallest distance between the reference reception part (55) and the reference lens (52).

A hybrid fixed focal length lens that includes five lens elements and a diaphragm for a LIDAR measurement system. Some of the lens elements have surfaces that are aspherical.

An optical scanning device (15) includes a reference light guide part (50); a sub-light guide part (40); a reference holding structure (53) which includes a reference reception part (55) configured so as to be in contact with the reference lens (52) deflected in a sub-scanning direction; a sub-holding structure (45) which includes a sub-reception part (45) configured so as to be in contact with the sub-lens (42) deflected in the sub-scanning direction, wherein a deflection direction of the reference lens (52) coincides with a deflection direction of the sub-lens (42), and when it is assumed that the reference lens (52) and the sub-lens (42) are not deflected, an absolute value of a smallest distance between the sub-reception part (45) and the sub-lens (42) is set to be equal to or larger than an absolute value of a smallest distance between the reference reception part (55) and the reference lens (52).

A laser processing apparatus includes: a laser light source configured to emit a laser beam; an optical scanner located along a path of the laser beam and configured to adjust the path of the laser beam; a lens unit located along the path of the laser beam, the lens unit being configured to condense the laser beam; a first adapter located between the lens unit and the optical scanner and coupled to the lens unit; and a second adapter located between the first adapter and the optical scanner, the second adapter being coupled to the first adapter and the optical scanner.

To provide an optical scanning device including a lower housing including an opened top part, an upper housing that covers the top part of the lower housing, a rotating polygon mirror that reflects a beam, an fθ lens on which the beam reflected by the rotating polygon mirror is incident, and a reflection mirror that reflects the beam. The lower housing is provided with a bottom surface opening including an opened bottom surface between the rotating polygon mirror and the reflection mirror.

A laser system including a laser source that generates a laser beam and an optical switch that receives the laser beam and selectively sends the laser beam to either a fast path or a slow path, wherein in the fast path the laser beam has a first F/# and in the slow path the laser beam has a second F/# that is higher in value that of the first F/#. The laser system further including an afocal optical system that is in the slow path and receives the laser beam from the optical switch and an x-y scanner that receives either a first laser beam from the slow path or a second laser beam from the fast path. The laser system including a scan lens system that receives a scanning laser beam from the x-y scanner and performs a z-scan for the scanning laser beam only in the case wherein the scanning laser beam is generated from the laser beam in the fast path. The laser system further including an aspheric patient interface device that receives a laser beam from the scan lens system.

A pattern drawing device is provided with: a first cylindrical lens on which a beam from a light source device is incident and which has an anisotropic refractive power for converging, in a sub-scanning direction orthogonal to a main scanning direction, the beam traveling toward a reflection surface of a polygon mirror; an fθ lens system for causing the beam having been deflected by the reflection surface of the polygon mirror to be incident thereon, and for condensing the beam as a spot light on a surface of an object to be irradiated; and a second cylindrical lens having an anisotropic refractive power for converging, in the sub-scanning direction, the beam traveling toward the surface after being emitted from the fθ lens system.

An optical scanning system includes a radiating source capable of outputting a source light beam, a de-scan lens that is configured to output a de-scanned light beam, the de-scan lens is located approximately one focal length of the de-scan lens from a sample irradiation location, a focusing lens that is configured to output a focused light beam, a first non-polarizing beam splitter configured to be irradiated by at least a portion of the focused light beam, a second non-polarizing beam splitter configured to be irradiated by at least a portion of the focused light beam that is reflected by the first non-polarizing beam splitter, and a detector that is located at approximately one focal length of the focusing lens from the focusing lens, the detector is configured to be irradiated by at least a portion of the focused light beam that is reflected by the second non-polarizing beam splitter.