Abstract:
Provided are a photoacoustic apparatus and method of operating the same. The photoacoustic apparatus includes: a laser module that generates laser light and transmits a laser state signal indicating a state of a laser module; a probe including an optical output unit for irradiating laser light generated by the laser module onto an object and a scanner for detecting a photoacoustic signal that is generated from the object; a scanner controller for controlling a position of the scanner; a sequence controller for controlling acquisition of the photoacoustic signal based on the laser state signal; a signal receiver that is controlled by the sequence controller to acquire the photoacoustic signal; and a photoacoustic image generator for generating a photoacoustic image based on the photoacoustic signal. The laser state signal includes a lasing ready state signal and a laser exposure state signal.
Abstract:
An optical reticle substrate inspection apparatus is provided with a laser, a first acoustooptical element which scans a laser beam output from the laser, an a second acoustooptical element which generates a virtual image with a concave lens effect to the laser beam output from the first acoustooptical element. The optical reticle substrate inspection apparatus is further provided with a concave lens arranged on the output side of the laser beam of the second acoustooptical element and an optical system which images the virtual image on a reticle substrate being an object to be inspected. The concave lens magnifies the laser beam in a perpendicular direction to the scanning direction by the first acoustooptical element.
Abstract:
An optical reticle substrate inspection apparatus is provided with a laser, a first acoustooptical element which scans a laser beam output from the laser, and a second acoustooptical element which generates a virtual image with a concave lens effect to the laser beam output from the first acoustooptical element. The optical reticle substrate inspection apparatus is further provided with a concave lens arranged on the output side of the laser beam of the second acoustooptical element and an optical system which images the virtual image on a reticle substrate being an object to be inspected. The concave lens magnifies the laser beam in a perpendicular direction to the scanning direction by the first acoustooptical element.
Abstract:
The object of the invention relates to a method for scanning with an optical beam (50) using a first acousto-optic deflector (15, 15′) having an optical axis along a Z-axis and at least one acousto-optic crystal layer (14), involving directing the optical beam (50) in the first acousto-optic deflector (15, 15′), and deflecting the optical beam (50) along an X-axis perpendicular to the Z-axis by means of the first acousto-optic deflector (15, 15), during which generating a plurality of acoustic chirp signals (30) in the at least one acousto-optic crystal layer (14) of the acousto-optic deflector (15, 15′) by—generating a first acoustic chirp signal (30a) having a duration of τ in the acousto-optic crystal layer (14), then—generating a second acoustic chirp signal (30b) in the acousto-optic crystal layer (14) within a τ period of time counted from the start of the generation of the first acoustic chirp signal (30a).
Abstract:
A system to generate multiple beam lines in an oblique angle multi-beam spot scanning wafer inspection system includes a beam scanning device configured to scan a beam of illumination, an objective lens oriented at an oblique angle relative to the surface of a sample and with an optical axis perpendicular to a first scanning direction on the sample, and one or more optical elements positioned between the objective lens and the beam scanning device. The one or more optical elements split the beam into two or more offset beams such that the two or more offset beams are separated in a least a second direction perpendicular to the first direction. The one or more optical elements further modify the phase characteristics of the two or more offset beams such that the two or more offset beams are simultaneously in focus on the sample during a scan.
Abstract:
A system and method for inspecting an object. The system includes: a traveling lens acousto-optic device adapted to generate a traveling lens that propagates through an active region of the traveling lens acousto-optic device; a first scanner, adapted to direct a beam of light towards the traveling lens while the traveling lens propagates; a first beam splitter, adapted to receive a beam formed by the traveling lens; and to split the scanned beam to multiple illuminating light beams; multiple detectors; and an objective lens; adapted to receive the multiple illuminating light beams, direct the multiple illuminating light beams towards multiple areas of the object, receive multiple collected light beams from the multiple areas of the object, and direct the multiple collected light beams towards the multiple detectors; wherein each detector is associated with an area of the multiple areas.
Abstract:
An optical reticle substrate inspection apparatus is provided with a laser, a first acoustooptical element which scans a laser beam output form the laser, and a second acoustooptical element which generates a virtual image with a concave lens effect to the laser beam output from the first acoustooptical element. The optical reticle substrate inspection apparatus is further provided with a concave lens arranged on the output side of the laser beam of the second acoustooptical element and an optical system which images the virtual image on a reticle substrate being an object to be inspected. The concave lens magnifies the laser beam in a perpendicular direction to the scanning direction by the first acoustooptical element.
Abstract:
An optical reticle substrate inspection apparatus is provided with a laser, a first acoustooptical element which scans a laser beam output form the laser, and a second acoustooptical element which generates a virtual image with a concave lens effect to the laser beam output from the first acoustooptical element. The optical reticle substrate inspection apparatus is further provided with a concave lens arranged on the output side of the laser beam of the second acoustooptical element and an optical system which images the virtual image on a reticle substrate being an object to be inspected. The concave lens magnifies the laser beam in a perpendicular direction to the scanning direction by the first acoustooptical element.