摘要:
A measurement apparatus which measures a distance between a reference surface and a test surface, comprises a light source unit including a plurality of light sources each corresponding to one of a plurality of wavelength scanning ranges and each continuously scans a wavelength of generated light in the corresponding wavelength scanning range, an interferometer unit which splits light emitted by each of the plurality of light sources into reference light and test light, and detects, as an interference signal, an interference fringe formed by the reference light and the test light, and a processor which determines a slope of a phase of the interference signal with respect to wave number of the light based on the interference signal detected by the interferometer unit for each of the plurality of wavelength scanning ranges, and determines the distance from the slope of the phase.
摘要:
A measuring apparatus includes a light source unit configured to continuously scan wavelengths of a plurality of types of beams at different speeds in a plurality of discrete wavelength scanning ranges, a beam synthesizer, an interferometer unit configured to detect as an interference signal an interference fringe formed by a reference beam reflected on a reference surface and a target beam reflected on a target surface, and a processor configured to determine the absolute distance based upon the interference signal detected by the interferometer unit. The interferometer unit includes a single optical detector. The processor obtains the absolute distance for each of the plurality of types of beams through a frequency analysis of a synthesized interference signal, and outputs one absolute distance by operating a plurality of absolute distances that have been obtained.
摘要:
The present invention provides an optical element which is used for light having a wavelength not more than 250 nm, and receives a light beam at a maximum incident angle not less than 55°, wherein the optical element includes an optical thin film in an effective aperture thereof, and a film thickness distribution of the optical thin film in the effective aperture includes a distribution in which a thickness of the optical thin film in an outermost periphery of the effective aperture is 1.10 times (inclusive) to 1.25 times (inclusive) a thickness of the optical thin film at a midpoint between an optical axis and the outermost periphery of the effective aperture.
摘要:
A method for manufacturing a projection optics that includes a plurality of optical elements composed of an amorphous material is provided. The method includes preparing a plurality of optical-thin-film candidates having various transmission characteristics, measuring transmission characteristics of the plurality of optical elements, calculating a transmission characteristic of the projection optics supposing that a certain optical-thin-film candidate of the plurality of optical-thin-film candidates is formed on a surface of each of the optical elements, selecting an optical thin film to be formed on the surface of each of the optical elements from the plurality of optical-thin-film candidates based on the calculated transmission characteristic, and forming the selected optical thin film on the surface of each of the optical elements.
摘要:
A detection apparatus which illuminates a sample and detects light reflected by the sample, comprises a light source, a columnar reflecting member having a columnar reflecting surface which reflects light having entered a first end of the columnar reflecting member by a plurality of number of times, and emits the light from a second end of the columnar reflecting member, a mirror which reflects light radiated by the light source so as to guide to the first end and a detector, wherein the sample is illuminated with the light emitted from the second end, and the detector is configured to detect the light which has been reflected by the sample and has passed through the columnar reflecting member, and a reflecting surface of the mirror is a concave surface, and a shape of a reflecting surface of the mirror on a section perpendicular to an axis of the columnar reflecting member is concave.
摘要:
A measurement apparatus which measures a distance between a reference surface and a test surface, comprises a light source unit including a plurality of light sources each corresponding to one of a plurality of wavelength scanning ranges and each continuously scans a wavelength of generated light in the corresponding wavelength scanning range, an interferometer unit which splits light emitted by each of the plurality of light sources into reference light and test light, and detects, as an interference signal, an interference fringe formed by the reference light and the test light, and a processor which determines a slope of a phase of the interference signal with respect to wave number of the light based on the interference signal detected by the interferometer unit for each of the plurality of wavelength scanning ranges, and determines the distance from the slope of the phase.
摘要:
A detection apparatus which illuminates a sample and detects light reflected by the sample, comprises a light source, a columnar reflecting member having a columnar reflecting surface which reflects light having entered a first end of the columnar reflecting member by a plurality of number of times, and emits the light from a second end of the columnar reflecting member, a mirror which reflects light radiated by the light source so as to guide to the first end and a detector, wherein the sample is illuminated with the light emitted from the second end, and the detector is configured to detect the light which has been reflected by the sample and has passed through the columnar reflecting member, and a reflecting surface of the mirror is a concave surface, and a shape of a reflecting surface of the mirror on a section perpendicular to an axis of the columnar reflecting member is concave.
摘要:
A sputtering apparatus is disclosed which enables highly accurate monitor control of a film thickness and allows enhanced flexibility in design. The apparatus includes a substrate placement area in which a substrate is placed, a particle emission area in which a target is placed and sputter particles from the target are emitted, and a sensor placement area in which a sensor is placed for measuring a thickness of a film formed on the substrate. The substrate placement area and the sensor placement area are provided in a positional relationship having symmetry with respect to a center line of the particle emission area.
摘要:
The present invention provides an optical element which is used for light having a wavelength not more than 250 nm, and receives a light beam at a maximum incident angle not less than 55°, wherein the optical element includes an optical thin film in an effective aperture thereof, and a film thickness distribution of the optical thin film in the effective aperture includes a distribution in which a thickness of the optical thin film in an outermost periphery of the effective aperture is 1.10 times (inclusive) to 1.25 times (inclusive) a thickness of the optical thin film at a midpoint between an optical axis and the outermost periphery of the effective aperture.