公开(公告)号：US5231462A

公开(公告)日：1993-07-27

申请号：US840863

申请日：1992-02-25

Applicant: Tsing Dschen

Inventor： Tsing Dschen

IPC: G01J3/06 ,  G01J3/18 ,  G01J3/26 ,  G01J3/433

CPC classification number: G01J3/433 ,  G01J2003/063 ,  G01J3/18 ,  G01J3/26 ,  G01N2201/069

Abstract: A spectrophotometer useful for measuring absorption or emission bands of a substance irradiated with optical radiation, comprises a light source for producing the optical radiation, a monochromator for isolating light of wavelength (W) from the optical radiation and which modulates the wavelength (W) by a predetermined wavelength amplitude (.delta.W), and a photodetector for detecting the intensity of light passing through the monochromator and for producing a measuring signal in response thereto. The monochromator operates under the control of an electronic control unit which produces a control signal that causes the monochromator to scan across a portion of the spectrum of the optical radiation at a frequency (f.sub.2) to transmit a narrow band of radiation at the wavelength (W). The control unit includes a modulation generator which produces a signal that causes the monochromator to modulate the wavelength (W) by the predetermined wavelength amplitude (.delta.W) at a frequency (f.sub.1). The spectrophotometer also includes an electronic evaluation unit which amplifies an a.c. component of the measuring signal that is attributable to the wavelength modulation in synchronization with the signal produced by the modulation generator. In one preferred embodiment, the monochromator comprises a diffraction grating and a drive unit which causes the diffraction to rotate about a pivot axis and which superimposes an oscillatory motion on the rotational movement. In another preferred embodiment, the monochromator comprises a Fabry-Perot resonator and a drive unit which adjusts the optical length of the Fabry-Perot resonator under the control of the control unit.

Abstract translation: 可用于测量用光辐射照射的物质的吸收或发射带的分光光度计包括用于产生光学辐射的光源，用于隔离来自光学辐射的波长（W）的光的单色仪，并且通过 预定波长幅度（ΔW）和用于检测通过单色仪的光的强度并用于响应于此产生测量信号的光电检测器。 单色仪在电子控制单元的控制下操作，该电子控制单元产生一个控制信号，该控制信号使单色仪以频率（f2）扫描光辐射的一部分光谱，以将波长（W ）。 控制单元包括一个调制发生器，该调制发生器产生一个使单色仪在频率（f1）下将波长（W）调制预定波长振幅（ΔW）的信号。 分光光度计还包括一个电子评估单元，其放大一个等 与由调制发生器产生的信号同步的归因于波长调制的测量信号的分量。 在一个优选实施例中，单色仪包括衍射光栅和驱动单元，该驱动单元使衍射围绕枢转轴线旋转并且在旋转运动上叠加振荡运动。 在另一个优选实施例中，单色仪包括法布里 - 珀罗谐振器和驱动单元，其在控制单元的控制下调节法布里 - 珀罗谐振器的光学长度。

公开(公告)号：US5376781A

公开(公告)日：1994-12-27

申请号：US122271

申请日：1993-09-15

Applicant: Tsing Dschen

Inventor： Tsing Dschen

IPC: B42D25/00 ,  G06K1/12 ,  G06K19/06 ,  G06K19/00

CPC classification number: B42D25/20 ,  B42D25/00 ,  G06K1/126 ,  G06K19/06046 ,  B42D2035/20 ,  B42D25/405

Abstract: A carrier for display fields or value characters, such as a credit card, contains optically readable display fields which can be erased by the effects of heat or which can at least be changed permanently in optical terms, and a storage layer for storing energy for the purpose of producing the thermal energy required for the heating effect at the location of the display field to be erased. In this way, the energy stored in the storage layer, which energy corresponds to at least the erase energy required, is released by the supply of an initial energy which is less than the erase energy. If a photoconductive layer is used additionally, the reading light beam can also serve to produce a local electrical current I in the region of the display field to be erased, wherein the current I produces sufficient thermal energy in the form of initial energy to set in notion the reaction process in the storage layer and to release the thermal energy stored therein. An arrangement of this kind can be used advantageously in instances where only a small electrical output is available for inducing a cancellation process.

Abstract translation: 用于显示字段或价值字符的载体（例如信用卡）包含光学可读的显示区域，其可以被热的影响消除，或者至少可以以光学方式永久地改变，以及用于存储能量的存储层 在待擦除的显示区域的位置产生加热效果所需的热能的目的。 以这种方式，存储在存储层中的能量（其至少对应于所需的擦除能量）的能量通过提供小于擦除能量的初始能量来释放。 如果另外使用光电导层，则读取光束还可用于在要擦除的显示区域的区域中产生局部电流I，其中电流I以初始能量的形式产生足够的热能，以设置在 概念存储层中的反应过程并释放存储在其中的热能。 在只有小的电输出可用于诱导取消过程的情况下，可以有利地使用这种布置。

公开(公告)号：US06839958B2

公开(公告)日：2005-01-11

申请号：US09951832

申请日：2001-09-12

Applicant: Eugen Mannhart ,  Thomas Günther ,  Felix Leu ,  Tsing Dschen

Inventor： Eugen Mannhart ,  Thomas Günther ,  Felix Leu ,  Tsing Dschen

IPC: H01L21/68 ,  B65G47/91 ,  H01L21/00 ,  H01L21/683 ,  H05K3/30

CPC classification number: H01L21/67259 ,  B65G47/917 ,  H01L21/6838 ,  Y10T29/53087 ,  Y10T29/53143 ,  Y10T29/53148 ,  Y10T29/53174 ,  Y10T29/53178 ,  Y10T29/53183

Abstract: An apparatus for the mounting of semiconductor chips comprises a bondhead with a pick-up tool with a longitudinal drill hole to which vacuum can be applied for the gripping and transport of a semiconductor chip. To detect whether the pick-up tool has gripped the semiconductor chip, a body with a reflecting surface is arranged in the longitudinal drill hole of the pick-up tool which, when passing over the light source on absence of the semiconductor chip deflects light shining from underneath into the longitudinal drill hole of the pick-up tool into a horizontal plane. The pick-up tool has locations which are pervious to the deflected light of the light source. At least one optical element is arranged on the bondhead which concentrates at least part of the deflected light emerging laterally from the pick-up tool onto a photosensor.

Abstract translation: 用于安装半导体芯片的装置包括具有带有纵向钻孔的拾取工具的接合头，真空可以被施加到真空以用于夹持和输送半导体芯片。 为了检测拾取工具是否夹住半导体芯片，具有反射表面的主体被布置在拾取工具的纵向钻孔中，当在不存在半导体芯片的情况下通过光源时偏转光照射 从下面到拾取工具的纵向钻孔进入水平面。 拾取工具具有可透过光源的偏转光的位置。 至少一个光学元件布置在接合头上，其将至少部分从拾取工具横向出射的偏转光集中到光传感器上。