公开(公告)号：US09335210B2

公开(公告)日：2016-05-10

申请号：US14321148

申请日：2014-07-01

Applicant: Ming Li ,  Qi Dai ,  Keng Chen

Inventor： Ming Li ,  Qi Dai ,  Keng Chen

IPC: G01J1/16 ,  G01J1/02 ,  G01J1/58 ,  H05B33/08

CPC classification number: H05B33/0869 ,  G01J1/0228 ,  G01J1/0238 ,  G01J1/16 ,  G01J1/58 ,  G01J2001/1673

Abstract: Techniques are disclosed for maintaining consistent lumen output of a lighting assembly over time. By maintaining a consistent lumen output, it is possible to maintain acceptable color stability where color mixing of multiple outputs is used. The lighting assembly may be any lighting configuration that might suffer from lumen depreciation and/or color drift over time, and may include any type(s) of light source(s) that may be monitored and driven accordingly. The lighting assembly, in addition to light source(s), includes a photo detector and a directed light source, such as a laser. The directed light source provides a golden sample for use in calibrating the photo detector, which in turn monitors lumen output of the light source(s). Drive signals are adjusted to account for lumen depreciation of the monitored light source(s).

Abstract translation: 公开了用于在一段时间内维持照明组件的一致的流明输出的技术。 通过保持一致的流明输出，可以在使用多个输出的颜色混合的情况下保持可接受的颜色稳定性。 照明组件可以是可能遭受流逝衰减和/或随时间的颜色漂移的任何照明配置，并且可以包括可以相应地监视和驱动的任何类型的光源。 除了光源之外，照明组件还包括光检测器和诸如激光器的定向光源。 定向光源提供用于校准光电检测器的金色样品，其又监测光源的流明输出。 驱动信号被调整以考虑所监视的光源的流明衰减。

公开(公告)号：US20160227621A1

公开(公告)日：2016-08-04

申请号：US15093917

申请日：2016-04-08

Applicant: Ming Li ,  Qi Dai ,  Keng Chen

Inventor： Ming Li ,  Qi Dai ,  Keng Chen

IPC: H05B33/08 ,  G01J1/02 ,  G01J1/16

CPC classification number: H05B33/0869 ,  G01J1/0228 ,  G01J1/0238 ,  G01J1/16 ,  G01J1/58 ,  G01J2001/1673

Abstract: Techniques are disclosed for maintaining consistent lumen output of a lighting assembly over time. By maintaining a consistent lumen output, it is possible to maintain acceptable color stability where color mixing of multiple outputs is used. The lighting assembly may be any lighting configuration that might suffer from lumen depreciation and/or color drift over time, and may include any type(s) of light source(s) that may be monitored and driven accordingly. The lighting assembly, in addition to light source(s), includes a photo detector and a directed light source, such as a laser. The directed light source provides a golden sample for use in calibrating the photo detector, which in turn monitors lumen output of the light source(s). Drive signals are adjusted to account for lumen depreciation of the monitored light source(s).

Abstract translation: 公开了用于在一段时间内维持照明组件的一致的流明输出的技术。 通过保持一致的流明输出，可以在使用多个输出的颜色混合的情况下保持可接受的颜色稳定性。 照明组件可以是可能遭受流逝衰减和/或随时间的颜色漂移的任何照明配置，并且可以包括可以相应地监视和驱动的任何类型的光源。 除了光源之外，照明组件还包括光检测器和诸如激光器的定向光源。 定向光源提供用于校准光电检测器的金色样品，其又监测光源的流明输出。 驱动信号被调整以考虑所监视的光源的流明衰减。

公开(公告)号：US20150316411A1

公开(公告)日：2015-11-05

申请号：US14699880

申请日：2015-04-29

Applicant: KLA-TENCOR CORPORATION

Inventor： Mark McCord ,  Yu Guan ,  James George

IPC: G01J1/18 ,  G01J1/04 ,  G01J3/02 ,  H05B33/08

CPC classification number: G01J1/04 ,  G01J1/0252 ,  G01J1/0403 ,  G01J1/18 ,  G01J1/42 ,  G01J3/0251 ,  G01J3/0286 ,  G01J2001/1673 ,  G01J2001/4247 ,  H05B33/0815 ,  H05B33/089

Abstract: The present disclosure provides methods and apparatus for testing light-emitting diodes (LEDs), for example, measuring the optical radiation of an LED. In a method, a pulse-width modulated signal is provided to the LED. One or more characteristics of the PWM signal are varied so as to provide a forward voltage, Vf, corresponding to a target junction temperature, Tj, of the LED. The optical radiation of the LED is measured when the LED obtains the target junction temperature.

Abstract translation: 本公开提供了用于测试发光二极管（LED）的方法和装置，例如测量LED的光辐射。 在一种方法中，向LED提供脉冲宽度调制信号。 改变PWM信号的一个或多个特性以提供对应于LED的目标结温Tj的正向电压Vf。 当LED获得目标结温时，测量LED的光辐射。

公开(公告)号：US11874164B2

公开(公告)日：2024-01-16

申请号：US17807458

申请日：2022-06-17

Applicant: Solar Light Company, LLC

Inventor： Michael H. Bonitatibus ,  Curtis Cole

IPC: G01J1/42 ,  A61K8/27 ,  A61K8/35 ,  A61K8/368 ,  A61K8/40 ,  A61K8/41 ,  A61Q17/04 ,  G01J1/02 ,  G01J1/04 ,  G01J1/08 ,  G01J1/18 ,  G01J1/16 ,  G01J1/44

CPC classification number: G01J1/429 ,  A61K8/27 ,  A61K8/35 ,  A61K8/368 ,  A61K8/40 ,  A61K8/411 ,  A61Q17/04 ,  G01J1/0233 ,  G01J1/0407 ,  G01J1/08 ,  G01J1/18 ,  G01J2001/1673 ,  G01J2001/4453

Abstract: A system, apparatus and method of improved measurement of the SPF factor of sunscreen compositions. In one embodiment, a method of measuring the protection of a sunscreen composition includes exposing skin to a known intensity of light, measuring the amount of remitted light from the skin, applying sunscreen to the skin, exposing the skin to which the sunscreen has been applied the known intensity of emitted light of the spectrum of light from which the sunscreen is intended to protect the skin, measuring the amount of light remitted from the skin, and calculating a UltraViolet-A Protection Factor (UVA-PF) of the sunscreen by comparing the amount of light remitted from the skin with the sunscreen to the amount of light remitted from the skin without the sunscreen.

公开(公告)号：US20160003670A1

公开(公告)日：2016-01-07

申请号：US14321148

申请日：2014-07-01

Applicant: Ming Li ,  Qi Dai ,  Keng Chen

Inventor： Ming Li ,  Qi Dai ,  Keng Chen

IPC: G01J1/16 ,  G01J1/02 ,  G01J1/58

CPC classification number: H05B33/0869 ,  G01J1/0228 ,  G01J1/0238 ,  G01J1/16 ,  G01J1/58 ,  G01J2001/1673

Abstract: Techniques are disclosed for maintaining consistent lumen output of a lighting assembly over time. By maintaining a consistent lumen output, it is possible to maintain acceptable color stability where color mixing of multiple outputs is used. The lighting assembly may be any lighting configuration that might suffer from lumen depreciation and/or color drift over time, and may include any type(s) of light source(s) that may be monitored and driven accordingly. The lighting assembly, in addition to light source(s), includes a photo detector and a directed light source, such as a laser. The directed light source provides a golden sample for use in calibrating the photo detector, which in turn monitors lumen output of the light source(s). Drive signals are adjusted to account for lumen depreciation of the monitored light source(s).

公开(公告)号：US4848904A

公开(公告)日：1989-07-18

申请号：US156285

申请日：1988-02-16

Applicant: Edwin R. Sapp ,  Eric K. Kinast

Inventor： Edwin R. Sapp ,  Eric K. Kinast

IPC: G01J3/18 ,  G01J1/16 ,  G01J1/42 ,  G01J1/44 ,  G01J3/28 ,  G01J3/42 ,  G01N21/27 ,  G01N21/77 ,  G01N30/74

CPC classification number: G01N21/27 ,  G01J3/42 ,  G01J2001/161 ,  G01J2001/1673 ,  G01J3/2803 ,  G01N2201/1232 ,  G01N2201/126 ,  G01N30/74

Abstract: The present invention relates to an improved dual beam multichannel spectrophotomer employing a simple and novel optical system in combination with photodiode arrays and a unique logrithmic data converter to convert light signals to absorbance. In particular, the optical system utilizes optical elements in a novel arrangement to direct a pair of equivalent sample and reference beams in an essentially parallel formation respectively through a sample and reference cell and to focus and direct the emergent sample and reference beams to a single flat horizontally ruled grating which disperses each of the sample and reference beams respectively onto a pair of vertically disposed photodiode arrays whereby the light signals are converted into absorbance units (AU) by an unique logarithmic data converter. The spectrophotometer is highly accurate, has very low drift, less than 2.times.10.sup.-4 AU/.degree.C., and very low noise, less than .+-.2.times.10.sup.-5 AU. The dual beam multichannel spectrophotomer is particularly suitable for use in high pressure liquid chromatography to record the absorbance spectrum of the samples as they are being eluted from the chromatographic column.

公开(公告)号：US09743483B2

公开(公告)日：2017-08-22

申请号：US15093917

申请日：2016-04-08

Applicant: OSRAM SYLVANIA Inc.

Inventor： Ming Li ,  Qi Dai ,  Keng Chen

IPC: G01J1/02 ,  G01J1/16 ,  H05B33/08 ,  G01J1/58

CPC classification number: H05B33/0869 ,  G01J1/0228 ,  G01J1/0238 ,  G01J1/16 ,  G01J1/58 ,  G01J2001/1673

Abstract: Techniques are disclosed for maintaining consistent lumen output of a lighting assembly over time. By maintaining a consistent lumen output, it is possible to maintain acceptable color stability where color mixing of multiple outputs is used. The lighting assembly may be any lighting configuration that might suffer from lumen depreciation and/or color drift over time, and may include any type(s) of light source(s) that may be monitored and driven accordingly. The lighting assembly, in addition to light source(s), includes a photo detector and a directed light source, such as a laser. The directed light source provides a golden sample for use in calibrating the photo detector, which in turn monitors lumen output of the light source(s). Drive signals are adjusted to account for lumen depreciation of the monitored light source(s).

公开(公告)号：US07649622B1

公开(公告)日：2010-01-19

申请号：US11824216

申请日：2007-06-30

Applicant: Ke-Cai Zeng ,  Steven Cummins ,  Edward Huber ,  Vincent Uy ,  Steven Sanders ,  Patrick Zicolello ,  Brett A. Spurlock

Inventor： Ke-Cai Zeng ,  Steven Cummins ,  Edward Huber ,  Vincent Uy ,  Steven Sanders ,  Patrick Zicolello ,  Brett A. Spurlock

IPC: G01J1/10 ,  G01J1/12

CPC classification number: G01J1/08 ,  G01J1/16 ,  G01J2001/0481 ,  G01J2001/1673 ,  G01J2001/4252

Abstract: A test system and method are provided for testing in parallel radiant output of multiple light emitting devices. Generally, the method involves: (i) providing a system having a master, calibrated power meter (CPM), a source transfer standard (STS), and multiple secondary, test site power meters (TSPMs); (ii) determining a relationship between electrical power supplied to the STS and a radiant output therefrom as measured by the CPM; (iii) calibrating the TSPMs using the STS and the relationship between the power supplied to the STS and the radiant output therefrom as determined by the CPM; and (iv) positioning the devices undergoing test on a fixture of the test system and positioning the fixture relative to the TSPMs to test radiant outputs of the devices. Preferably, the TSPMs are calibrated by exposing each to the STS at a known power, determining a difference between the radiant output measured by the CPM and TSPM, using this difference as an offset that is added to the a signal from the TSPM to provide a corrected radiant output for the device under test. Other embodiments are also disclosed.

Abstract translation: 提供了一种用于测试多个发光器件的并行辐射输出的测试系统和方法。 通常，该方法包括：（i）提供具有主，校准功率计（CPM），源传输标准（STS）和多个次级测试站功率计（TSPM）的系统; （ii）确定由CPM测量的提供给STS的电力与其辐射输出之间的关系; （iii）使用STS校准TSPM，以及由CPM确定的提供给STS的功率与辐射输出之间的关系; 以及（iv）将经过测试的设备定位在测试系统的固定装置上并相对于TSPM定位固定装置以测试装置的辐射输出。 优选地，TSPM通过以已知功率将每个接收到STS进行校准，确定由CPM和TSPM测量的辐射输出之间的差异，使用该差作为相加于来自TSPM的信号以提供 被测器件的校正辐射输出。 还公开了其他实施例。

公开(公告)号：US4737652A

公开(公告)日：1988-04-12

申请号：US847454

申请日：1986-04-03

Applicant: Leopold Faschingleitner ,  Peter W. Krempl ,  Wolfgang Schindler

Inventor： Leopold Faschingleitner ,  Peter W. Krempl ,  Wolfgang Schindler

IPC: G01J1/16 ,  G01N15/06 ,  G01N21/31 ,  G01R17/02 ,  G01N21/49

CPC classification number: G01N21/314 ,  G01J1/16 ,  G01R17/02 ,  G01J2001/1673 ,  G01N15/06 ,  G01N2201/127

Abstract: In order to eliminate equipment-generated fluctuations during the periodic determination of a quantity to be measured which is effected by forming the difference between a measuring signal which has been altered relative to a source signal by the measurement variable and a reference signal which has remained unaffected relative to the source signal by the measurement variable, a base signal level is determined for each measuring cycle as the difference between the reference level and a zero level in the absence of a source signal, subsequent to which each actual reference signal level and each measuring signal level is compensated with the previously determined reference signal level. By amplifying the compensated reference signals prior to difference formation and standardizing the signal difference to the base signal level, a high degree of accuracy may be achieved even if the attenuations of the measuring signal caused by the quantity to be measured are very small.

Abstract translation: 为了消除设备产生的波动，在通过形成相对于源信号被测量变量改变的测量信号与保持不受影响的参考信号之间的差异来定期测量待测量时 通过测量变量相对于源信号，将每个测量周期确定基准信号电平作为在没有源信号的基准电平和零电平之间的差值，随后每个实际参考信号电平和每个测量 信号电平用先前确定的参考信号电平进行补偿。 通过在差分形成之前放大补偿参考信号并将信号差标准化为基本信号电平，即使由待测量引起的测量信号的衰减非常小，也可以实现高精度。