-
公开(公告)号：US4633078A
公开(公告)日：1986-12-30
申请号：US757996
申请日：1985-07-23
申请人： Alan Ferber
发明人： Alan Ferber
CPC分类号： G01J3/02 , G01J3/021 , G01J3/2803
摘要： Wavelength related interference artifacts may appear superimposed on the output data curve of a scanning spectrophotometer utilizing a photodiode array as photometric detector. These may be suppressed by interposing a transparent optical element in the optical beam adjacent to its incidence on the array. Such an element should have no optical power along an axis parallel to the wavelength axis of the array and should provide varying phase displacement of the rays of the beam transverse to the wavelength axis. Several forms such an optical element may take are disclosed.
摘要翻译： 波长相关的干扰伪像可能会叠加在扫描分光光度计的输出数据曲线上，利用光电二极管阵列作为光度检测器。 这些可以通过在与其阵列上的入射相邻的光束中插入透明光学元件来抑制。 这样的元件应当沿着平行于阵列的波长轴的轴线不具有光焦度，并且应该提供横向于波长轴线的光束的变化的相位位移。 公开了这样一种光学元件的几种形式。
-
公开(公告)号：US4468601A
公开(公告)日：1984-08-28
申请号：US394552
申请日：1982-07-02
申请人： Mort Chamran , Alan Ferber
发明人： Mort Chamran , Alan Ferber
摘要： An improvement in the operation of a system where the driving means is a stepper motor comprises provision of a special software routine implemented by a microprocessor controlling the delivery of a counted series of pulses to drive the stepper motor. The improved routine removes excitation from the stepper motor when not receiving a series of stepping pulses thus eliminating the heat dissipation of such a motor when not in motion. Loss of position is avoided by utilizing the inherent detenting action of the stepper motor's permanent magnet field. Provision is also made for proper damping to prevent error due to overshoot. Where several stepper motors are used in a system the reduction of heat dissipation permits a significant simplification of the system cooling requirements. A single power supply may be shared among the motors thus further simplifying the system.
摘要翻译： 驱动装置是步进电机的系统的操作的改进包括提供由微处理器实现的特殊软件程序，该微处理器控制计数的一系列脉冲的传送以驱动步进电机。 改进的程序在不接收一系列步进脉冲时消除步进电机的激励，从而消除了在不运动时这种电动机的散热。 利用步进电机的永久磁场的固有的限制动作可以避免位置的损失。 还提供适当的阻尼以防止由于过冲引起的误差。 在系统中使用几个步进电机的情况下，减少散热能够显着简化系统冷却要求。 可以在电机之间共享单个电源，从而进一步简化系统。
-
搜索结果
2 条记录 (耗时 0.011 秒)
