A pre-objective two-degree-of-freedom galvanometer scanning system including two galvo mirrors (111,112) with an optical relay (120) between the mirrors (111,112) and a microscope objective (130) with a curved image plane (140) is presented. The second galvo mirror (112) is located in the aperture stop before the objective. The optical system enables scanning in both directions over the full, curved field for creating custom refractive structures across the 6.5 mm optical zone of contact lenses using femtosecond micro-modification.

A laser system including a laser source that generates a laser beam and an optical switch that receives the laser beam and sends the laser beam to either a fast path or a slow path, wherein the F/# of the fast path is lower than the F/# of the slow path. The laser system includes an afocal optical system in the slow path and receives the laser beam from the optical switch and an x-y scanner that receives either a laser beam from the slow path or a laser beam from the fast path. The laser system including a scan lens system that 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 including an aspheric patient interface device that receives a laser beam from the scan lens system.

Provided are an air ionization display apparatus and a control method therefor, which relate to the field of imaging technologies. The air ionization display apparatus includes: a pulse laser source configured to generate a pulse laser beam; a beam splitter configured to split the pulse laser beam into a first sub-beam and a second sub-beam; a pulse laser regulation assembly configured to regulate a wavelength of the second sub-beam to obtain a third sub-beam, and regulate a time difference between the third sub-beam and the first sub-beam to delay an emission of the third sub-beam; a beam combiner configured to combine the first sub-beam and the third sub-beam that is subject to the delayed emission to obtain a combined beam; and a light field adjustment and control assembly configured to adjust and converge the combined beam, and ionize air at a display region to form a holographic image.

A wide angle MWIR F-theta lens with an F# of 2. The lens is deployed on airborne platforms for remote sensing applications. The lens is corrected for monochromatic and chromatic aberrations over the wavelength range 5000 nm-3300 nm. The image of the remote target is formed on a focal plane which may constitute CCD or CMOS with micro lenses. The lens comprises four groups of optical elements with a cold shield/aperture stop located behind the last group. One embodiment of the lens includes five types of optical materials and while another embodiment of the lens includes only two types of optical materials.

In a toric lens comprising a toric surface having a fine uneven structure, the fine uneven structure includes a plurality of holes, the plurality of holes have a hole depth H and a surface opening diameter t which satisfy an expression of 0.3H/t0.6, and (a) the plurality of holes have a hole structure having a cylindrical shape on a bottom surface side and a circular truncated cone shape having an opening diameter increasing toward a surface side, or (b) an angle formed between an opening portion and the surface of the plurality of holes satisfies 7885.

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.

An F-theta lens provides more than 88 degrees FFOV, F #2.8 or less, length not more than 200 mm, and/or 2.5 m or better resolution, with color correction from 450 nm to 650 nm. The lens includes three optical groups having positive, negative, and positive optical powers respectively, which can include four, four, and six elements, respectively. Embodiments include an aperture stop in the center of the second optical group. Refractive indices and ray heights are selected to correct for field curvature. Embodiments further include a CMOS detector having pixel pitch of 1.25 microns or less, density of 18 megapixels or more, focal plane diameter of 57.2 mm or more, Nyquist sampling of 400 lines per mm or more and wide pixel field of view of 30 or more. A plurality of CMOS detectors can be arrayed to create a mosaic image.

A multi-beam scanning system and methods of operating the same to compensate for distortion are provided. Generally, the method involves illuminating a spatial light modulator including SLM pixels arranged in parallel, each pixel including a multiple address pixels. Drive signals including image data are provided to the pixels to generate beams of modulated light reflected therefrom, which is scanned to a linear swath of a two-dimensional imaging plane using a collimate lens, a scan mirror moved about a first axis, and an imaging lens. The swath is scanned across the imaging plane in a direction orthogonal to a long axis of the swath by moving the scan mirror about a second axis. To compensate for distortion along the long axis of the swath compensated image data is provided to at least some of the address pixels generating beams of modulated light distal from an optical axis of the imaging lens.

A lens system for use with a high laser power density scanning system is disclosed and includes a first lens group having one or more refractive optical elements therein. The first lens group is in communication with at least one high average power laser scanning system and is configured to transmit at least one high average laser power density signal there through. At least a second lens group having one or more refractive optical elements therein is in communication with the laser scanning system via the first lens group. The second lens group is configured to transmit the high average laser power density signal there through. At least one diffractive optical element may be in communication with at least one of the first lens group and the second lens group and is configured to transmit the at least one high average laser power density signal there through.

Apparatus for generating ultraviolet (UV) pulsed laser-radiation for material-processing includes a laser-source providing infrared (IR) pulsed laser-radiation and a frequency-conversion module. A lithium tetraborate (Li.sub.2B.sub.4O.sub.7) crystal located within the frequency-conversion module converts the IR pulsed laser-radiation to UV pulsed laser-radiation by non-linear harmonic generation. The frequency-conversion module is an airtight enclosure that may be evacuated or contain a dry gas. A flexible optical fiber-assembly transports the IR pulsed laser-radiation from the laser-source to the frequency-conversion module.