专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US4544274A Apparatus and method for measurement of weak optical absorptions by thermally induced laser pulsing 失效
标题翻译：用于通过热激光脉冲测量弱光吸收的装置和方法
公开(公告)号：US4544274A
公开(公告)日：1985-10-01
申请号：US386372
申请日：1982-06-08
申请人： David A. Cremers , Richard A. Keller
发明人： David A. Cremers , Richard A. Keller
IPC分类号： G01N21/17 , G01N21/00
CPC分类号： G01N21/171 , G01N2021/1712
摘要： The thermal lensing phenomenon is used as the basis for measurement of weak optical absorptions when a cell containing the sample to be investigated is inserted into a normally continuous-wave operation laser-pumped dye laser cavity for which the output coupler is deliberately tilted relative to intracavity circulating laser light, and pulsed laser output ensues, the pulsewidth of which can be related to the sample absorptivity by a simple algorithm or calibration curve. A minimum detection limit of less than 10.sup.-5 cm.sup.-1 has been demonstrated using this technique.
摘要翻译：当将含有待研究样品的电池插入正常连续波操作的激光泵浦染料激光腔中时，热透镜现象被用作测量弱光吸收的基础，输出耦合器相对于腔内有意地倾斜循环激光和脉冲激光输出，其脉宽可以通过简单的算法或校准曲线与样品吸收率相关。已经使用这种技术证明了小于10-5cm-1的最小检测限。

22. 发明授权

US4037271A Switching regulator power supply 失效
标题翻译：开关稳压电源
公开(公告)号：US4037271A
公开(公告)日：1977-07-19
申请号：US747229
申请日：1976-12-03
申请人： Richard A. Keller
发明人： Richard A. Keller
IPC分类号： H02H7/12 , H02M3/335
CPC分类号： H02H7/1213 , H02M3/33523
摘要： A switching regulator electronic power supply for 115 volt A.C. operation rectifies and filters to provide approximately 170 volts of unregulated D.C. to the primary winding of a power conversion transformer. In series with the primary winding is a transistor power switch controlled by a pulse width modulator whose ON-time is determined by the rectified D.C. voltage level, and whose OFF-time is controlled by an output voltage sensor and a current limiter that provide duty cycles that assure a constant D.C. voltage level from the rectified and filtered output of the power supply.
摘要翻译：用于115伏交流电的开关稳压器电子电源对整流和滤波器提供大约170伏的未调节的直流电到电力转换变压器的初级绕组。与初级绕组串联的是由脉冲宽度调制器控制的晶体管功率开关，其导通时间由整流的直流电压电平确定，并且其截止时间由输出电压传感器和提供占空比的限流器确保来自电源的整流和滤波输出的恒定的直流电压电平。

你已经成功收藏专利！

检索式保存成功!

IPRDB