公开(公告)号：US3559185A

公开(公告)日：1971-01-26

申请号：US3559185D

申请日：1968-08-07

Applicant: IBM

Inventor： BURNS GERALD ,  SMITH ARCHIBALD W ,  SMITH WILLIAM V

IPC: G02F1/05 ,  G09G3/34 ,  G11C11/22 ,  G11C11/23 ,  G11C13/04 ,  G11C11/42

CPC classification number: G11C13/047 ,  G02F1/0525 ,  G09G3/34 ,  G11C11/22 ,  G11C11/23

Abstract: A crystalline material gadolinium molybdate, CD3(MoO4)3 has been determined to have reversible birefringence, the sign of the birefringence depending upon the direction of polarization along the ferroelectric axis of the Gd3(MoO4)3 crystal. Thus, if the ferroelectric axis is chosen as the c-axis (or optical axis), the a-axis and b-axis are two other crystallographic axes that are perpendicular to such c-axis, and the index of refraction of light polarized along the a-axis i different from the index of refraction of light polarized along the b-axis. The property of the reversibility of the birefringence enables one to optically sense the direction of light sent through the crystal, parallel to the c-axis. Such a crystal can be used in various optical switching and memory devices.

Abstract translation: 1,253,168。 调光 国际商业机器公司1969年7月22日[1968年8月7日]，第36770/69号。 标题H4F。 [也在G4部分]可以用作存储元件的光学开关包括用于在与其c轴平行的Gd 2（MoO 4）3的晶体上施加电场的装置，该晶体是铁电体并显示出可逆的 双折射，即它将保持在两个双折射状态之一中，这取决于在阈值（切换）值之上的最后施加的电场的极性，两个状态的关联在于快轴和慢轴互换。 在一个实施例中，晶体设置有透明银电极并形成四分之一波长板，使得线性偏振输入光随着晶体的状态而以手环圆极化的方式出现。 然后另一个四分之一波片和分析仪将阻挡或将出射光传递到检测器。 还描述和示出了这样的单元的X-Y可寻址阵列，并且随后的四分之一波片和分析器可以形成为阵列上的整体膜。 在第二实施例中，一个电极是反射性的。 银或铜，另一种为带状或透明的形式，使得由分束器引导通过晶体的线偏振激光通过具有左或右圆偏振的分离器反射回。 电子枪使用较高能量的电子束来对反射电极进行负电荷，通过低电压束或二次发射来充电，因此切换晶体。 来自分束器的光再次通过四分之一波片和分析仪。 这样的存储单元的阵列可以由单个电子束操作，并且分析的光传递到电子束扫描管的光导层。

公开(公告)号：US3626321A

公开(公告)日：1971-12-07

申请号：US3626321D

申请日：1968-11-13

Applicant: IBM

Inventor： SMITH ARCHIBALD W

IPC: H01S3/08 ,  G01B9/02 ,  G02F1/29 ,  G02F1/33 ,  G06K7/12 ,  G11C13/04 ,  H01S3/098 ,  H01S3/101 ,  H04N3/12 ,  H01S3/10

CPC classification number: G02F1/29 ,  G02F1/33 ,  G06K7/12 ,  G11C13/042 ,  H01S3/101 ,  H04N3/12

Abstract: There is disclosed an optical scanner for optically scanning a target trace in the focal plane of an optical lens system. By establishing a plurality of coherent light beams with ordered geometrical intervals and frequency differentials from each other, the appropriate phase relationships are established for the beams to provide a moving interference pattern on the target trace. In particular, the source of the coherent beams alternatively may be a single beam laser whose consequent beam is caused by multiple reflections, diffractions, and transmissions to become an effective plurality of coherent beams or may be a multimode laser cavity whose beams are phase locked by the diffraction property of an acoustic wave medium. In particular, the diffraction of an incoming light beam by an acoustic wave obtains the requisite phase locking for the several interfering beams on the target trace.

公开(公告)号：US3602724A

公开(公告)日：1971-08-31

申请号：US3602724D

申请日：1964-03-27

Applicant: IBM

Inventor： SMITH ARCHIBALD W

IPC: H01S3/06 ,  H01S3/109 ,  H02M5/00

CPC classification number: H01S3/0615 ,  H01S3/0627 ,  H01S3/109

Abstract: A group of devics are set forth that individually employ a transparent nonlinear dielectric element, such as a piezoelectric crystal, in the cavity of a laser. The crystal serves to generate harmonics of the frequency generated by the laser. The light energy whose frequency is to be converted is retained in the laser cavity and the electric field within the cavity builds up to high values. The conversion efficiency is high because the harmonic electric field is proportional to the square of the fundamental electric field.

公开(公告)号：US3509489A

公开(公告)日：1970-04-28

申请号：US3509489D

申请日：1967-04-13

Applicant: IBM

Inventor： BURNS GERALD ,  SMITH ARCHIBALD W

IPC: H01S3/101 ,  H01S3/00 ,  G02F1/32

CPC classification number: H01S3/101