Ultraviolet index measuring method and apparatus

    公开(公告)号:US09952093B2

    公开(公告)日:2018-04-24

    申请号:US15007884

    申请日:2016-01-27

    CPC classification number: G01J1/4228 G01J1/16 G01J1/429

    Abstract: An ultraviolet index measuring method and apparatus includes preparing a first photosensor having spectral response only in a first section of a wavelength between 250 nm and 298 nm, a second photosensor having spectral response only in a second section of a wavelength between 298 nm and 328 nm, and a third photosensor having spectral response only in a third section of a wavelength between 328 nm and 400 nm. An output signal of the first photosensor, an output signal of the second photosensor, and an output signal of the third photosensor are calibrated using spectral irradiance of reference solar light. First photocurrent of the first photosensor, second photocurrent of the second photosensor, and third photocurrent of the third photosensor are measured under a measurement environment. An ultraviolet index is calculated using the first photocurrent, the second photocurrent, and the third photocurrent under the measurement environment.

    Correction of rotational inaccuracy in lateral shearing interferometry

    公开(公告)号:US09863814B2

    公开(公告)日:2018-01-09

    申请号:US14318003

    申请日:2014-06-27

    CPC classification number: G01J9/0215 G01J2009/002

    Abstract: Provided is an operating method of a measuring apparatus measuring a wavefront of a target. The operating method includes measuring a measurement wavefront on the basis of the wavefront of the target, measuring reference slope information and first to third slope information respectively corresponding to a reference direction and first to third directions on the basis of the measurement wavefront, obtaining first to third rotation angles on the basis of the measured reference slope information and first to third slope information, and outputting a wavefront of which an error is corrected, which is generated by rotation errors on the basis of the obtained first to third rotation angles, wherein the first to third rotation angles are differences in angle between the reference direction and the first to third directions.

    TEMPERATURE RISE CONTROLLABLE ANECHOIC SOUND ABSORBER USING TWO DIFFERENT KINDS OF SCATTERING PARTICLE AND METHOD FOR MANUFACTURING THE SAME

    公开(公告)号:US20170345405A1

    公开(公告)日:2017-11-30

    申请号:US15263043

    申请日:2016-09-12

    CPC classification number: G10K11/162

    Abstract: The present disclosure relates to a temperature controllable anechoic sound absorber using two different kinds of scattering particles and a method for manufacturing the same. More specifically, a temperature rise controllable anechoic sound absorber using two different kinds of scattering particles, which absorbs a sound wave which is transmitted through a medium, includes a composite material which induces a scattering process of the sound wave and has a first scattering particle and a second scattering particle; and a base material which fills a base of the absorber during the scattering process of the sound wave. Herein, volume content ratios of the base material, the first scattering particle, and the second scattering particles are adjusted so that a heat capacity of the absorber is within a set heat capacity range.

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