Abstract:
A simple yet versatile noncontact optical inspection instrument and method for inspection of magnetic disk surfaces for surface defects. The instrument is also capable of discriminating between surface defects and surface contaminants. The instrument is comprised of two identical optical sensors (12) which are located on opposite sides of the disk (16). A carriage (14) supports and translates these sensors (12) along the disk radius while a spindle rotates the disk (16). Both surfaces of the disk (16) are therefore simultaneously scanned in a spiral fashion. The sensor's illumination optics produce a monochromatic focused spot of light which is normally incident upon the disk surface. The sensor uses two collection optics channels which simultaneously detect both the specular reflected light and the diffuse scattered light produced by the disk (16) surface. Both the angle and power of the specular reflected light are measured, while just the power of the diffuse scattered light is measured.
Abstract:
PROBLEM TO BE SOLVED: To provide a laser scattering defect inspection technology capable of effectively performing defect inspection. SOLUTION: A laser scattering defect inspection system 100 includes: a stage unit 2 that rotates a workpiece W and transports the workpiece W in one direction; a laser light source 1 that emits a laser beam LB toward the workpiece W mounted on the stage unit 2; an optical deflector 15 that scans the laser beam LB emitted from the laser light source 1 on the workpiece W; an optical detector 16 that detects the laser beam LB scattered from the surface of the workpiece W; a storage unit 24 that stores defect inspection conditions for each inspection step of a manufacturing process of the workpiece W, where the conditions include the rotation speed and the moving speed of the workpiece W by the stage unit 2, the scan width on the workpiece W and the scan frequency by the optical deflector 15; and a control unit 25 that reads the defect inspection conditions stored for each inspection step in the storage unit 24 and controls the driving of the stage unit 2 and the optical deflector 15 under the conditions. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
본 발명은 테라헤르츠파 영역의 광원을 이용하여 비파괴적인 방법으로 높은 검출 분해능을 가진 물체 검사 장치 및 이에 포함된 포커싱 렌즈를 개시한다. 본 발명에 따른 물체 검사 장치는, 테라파를 생성하여 시간에 따라 경로를 이동시키며 상기 테라파를 피검물로 공급하는 테라파 공급부; 상기 테라파 공급부와 상기 피검물 사이에 위치하여, 상기 테라파 공급부에 의해 공급되는 테라파를 포커싱하는 포커싱 렌즈; 플레이트 형태로 구성되어 중심으로부터 거리를 달리하는 상기 포커싱 렌즈를 다수 개 구비하며, 상기 테라파의 경로 이동에 따라 어느 하나의 포커싱 렌즈가 상기 테라파의 진행 경로에 위치하도록 원주 방향으로 회전하는 회전판; 및 상기 피검물에 입사된 테라파를 수집하여 검출하는 테라파 검출부를 포함한다.
Abstract:
A light beam (16) such as a laser beam is used to scan the surface of an egg for flaws such as pin holes, cracks, thinned shell regions, etc. The light beam is vibrated with a rocking/rotating movement to describe a closed curve (52) such as a circle, ellipse or an ellipse so narrow that it is effectively a straight line. The utilisation of such a light beam allows identification of types of flaws due to the character of the progression of light emanating from the egg. The invention includes apparatus for rotating the egg about its longitudinal axis in the path of the beam or beams. The apparatus also includes means for forming the vibrating beam such as mirrors (18) vibrated by out of phase electro-magnetic vibration, piezoelectric actuators (20) or other means.
Abstract:
Devices and methods for recording dynamics of cellular and/or biochemical processes, including a device including one or more dispersive elements configured to receive a pulsed laser beam with a spectrum of different wavelengths and disperse the spectrum of the pulsed laser beam; and one or more first elements configured to receive the dispersed spectrum of the pulsed laser beam, and generate a multiphoton excitation area in a biological sample by re-overlapping in time and space the dispersed spectrum of the pulsed laser beam on an area in the biological sample, a scanning element that is configured to scan the multiphoton excitation area in an axial direction, wherein the device is configured to record at high speed changes of cellular and biochemical processes of a population of cells of the biological sample based on generation of the multiphoton excitation area in the biological sample.
Abstract:
A cylindrical mirror or lens (12) is used to focus an input collimated beam of light onto a line (20) on the surface to be inspected, where the line is substantially in the plane of incidence of the focused beam. An image of the beam is projected onto an array of CCD (32) parallel to the line for detecting anomalies and/or features of the surface, where the array is outside the plane of incidence of the focused beam. For inspecting surface with a pattern thereon, the light from the surface is first passed through a spatial filter (106) before it is imaged onto the CCD. The spatial filter may be replaced by reflective strips that selectively reflects scattered radiation to the detector, where the reflective strips also shift in synchronism with the relative motion.
Abstract:
A cylindrical mirror or lens is used to focus an input collimated beam of light onto a line on the surface to be inspected, where the line is substantially in the plane of incidence of the focused beam. An image of the beam is projected onto an array of charge-coupled devices parallel to the line for detecting anomalies and/or features of the surface, where the array is outside the plane of incidence of the focused beam. For inspecting surface with a pattern thereon, the light from the surface is first passed through a spatial filter before it is imaged onto the charge-coupled devices. The spatial filter includes stripes of scattering regions that shift in synchronism with relative motion between the beam and the surface to block Fourier components from the pattern. The spatial filter may be replaced by reflective strips that selectively reflects scattered radiation to the detector, where the reflective strips also shifts in synchronism with the relative motion.