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1. 发明申请

WO2019089600A1 VISUAL ACUITY EXAMINATION 审中-公开
公开(公告)号：WO2019089600A1
公开(公告)日：2019-05-09
申请号：PCT/US2018/058219
申请日：2018-10-30
申请人： WELCH ALLYN, INC.
发明人： LANE, John, A. , GOLDFAIN, Ervin , SCHNEIDER, Megan , LOU, Yaolong , KELLNER, David, L. , MERELES, Mathias , ROBERTS, Chris, R. , WHITAKER, Tyson, B.
IPC分类号： A61B3/028
CPC分类号： A61B3/103 , A61B3/0025 , A61B3/005 , A61B3/032 , A61B3/14 , G06T3/40
摘要： A vision screening apparatus conducts a photorefraction ocular screening test to generate refractive error data. Based on the refractive error data, a Snellen equivalent is determined. An evaluated person distance from the vision screening apparatus is also determined and used to generate an adjusted optotype size. The vision screening apparatus displays the optotype, adjusted for the Snellen equivalent and the evaluated person distance.

2. 发明申请

WO2023091660A1 VISION SCREENING SYSTEMS AND METHODS 审中-公开
公开(公告)号：WO2023091660A1
公开(公告)日：2023-05-25
申请号：PCT/US2022/050390
申请日：2022-11-18
申请人： WELCH ALLYN, INC.
发明人： BREMER, Edward, Charles , LOU, Yaolong
IPC分类号： A61B3/00 , A61B3/02 , A61B3/14
摘要： A system includes system housing, an eccentric radiation source, and a radiation sensor. The radiation produced by the eccentric radiation source can be collected by the radiation sensor to generate images of retinas for a patient. The system also includes a vision screening device connected with the eccentric radiation source and the radiation sensor via the system house that can control and synchronize actions for the eccentric radiation source and the radiation sensor. The vision screening device further analyzes the images generated by the radiation sensor via neural network algorithms to determine spherical error slopes, refractive errors, and recommendations for the patient.

3. 发明申请

WO2014070570A1 FREQUENCY-ADAPTIVE NOTCH FILTER 审中-公开
标题翻译：频率自适应滤波器
公开(公告)号：WO2014070570A1
公开(公告)日：2014-05-08
申请号：PCT/US2013/066554
申请日：2013-10-24
申请人： WELCH ALLYN, INC.
发明人： LOU, Yaolong , GWEE, Yong Sern , GLOCKER, Peter
IPC分类号： H03H21/00 , H03H17/02
CPC分类号： H03H21/0021 , A61B5/04017 , A61B5/0402 , A61B5/7203 , A61B5/725 , A61B2560/0475
摘要： One apparatus includes a notch filter that has a state observer unit and a parameter adaptation unit. The state observer unit is configured to receive a sampled noisy electrical signal and a sampled filtered electrical signal, the state observer unit having an estimated noise signal output, the estimated noise signal output carrying an estimated noise signal to be subtracted from the sampled noisy electrical signal, resulting in the filtered electrical signal. The parameter adaptation unit is configured to receive the estimated noise signal and an error signal from the state observer unit. The parameter adaptation unit is also configured to determine, based on the estimated noise signal and the error signal, an updated estimated noise frequency, thereby causing the state observer unit to generate an updated estimated noise signal to be provided on the estimated noise signal output.
摘要翻译：一种装置包括具有状态观察单元和参数适配单元的陷波滤波器。状态观察器单元被配置为接收采样的噪声电信号和采样的滤波电信号，状态观测器单元具有估计的噪声信号输出，所估计的噪声信号输出承载要从采样的噪声电信号中减去的估计噪声信号，导致滤波后的电信号。参数适配单元被配置为从状态观察器单元接收估计的噪声信号和误差信号。参数调整单元还被配置为基于所估计的噪声信号和误差信号来确定更新的估计噪声频率，从而使状态观察器单元产生要在估计的噪声信号输出上提供的更新的估计噪声信号。

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