公开(公告)号：JPH0237613B2

公开(公告)日：1990-08-27

申请号：JP14383882

申请日：1982-08-19

Applicant: CANON KK

Inventor： TOMITA YASUO

IPC: G11B11/10 ,  G11B11/105 ,  G11C13/06

公开(公告)号：JPS60216337A

公开(公告)日：1985-10-29

申请号：JP7188784

申请日：1984-04-12

Applicant: CANON KK

Inventor： TOMITA YASUO ,  KANDA SHIGETO ,  MATSUMURA SUSUMU

IPC: H03K19/14 ,  G02F1/13 ,  G02F3/00

Abstract: PURPOSE:To facilitate data input by arranging a rotary polarizing medium which is applied with a voltage between two adjacent polarizing plates among three polarizing plates arranged as one picture element successively, and composing two polarizing plates of two split image pattern modulators. CONSTITUTION:A polarizing plates 10 is divided into two upper and lower parts, and the division parts have a polarized wave transmission direction in an (x) and a (y) direction as shown by arrows. Liquid crystal 11 and 11' which change in rotary polarization by external voltage application are sandwiched between transparent electrodes 12 and 12'. A polarizing plate 13 has the (y) transmission direction and a polarizing plate 14 is arranged at 90 deg. to the polarizing plate 10. The liquid crystals 11 and 11' change in polarization direction by 90 deg. when no voltage is applied and lose rotary polarization when a voltage above a threshold value is applied. Unpolarized or circular polarized incident light is made incident from the side of the polarizing plate 10 to four kinds of polarization-direction patterns by the polarizing plate 14 according to what voltage is applied between the liquid crystals 11 and 11'. Digital parallel arithmetic with good data accessibility is performed by this input means.

公开(公告)号：JPS5821213A

公开(公告)日：1983-02-08

申请号：JP11915581

申请日：1981-07-31

Applicant: CANON KK

Inventor： TOMITA YASUO ,  OGURA SHIGETAROU ,  MATSUMOTO KAZUYA

IPC: G02B6/30 ,  G02B6/122 ,  G02B6/34 ,  G02B7/18

Abstract: PURPOSE:To improve the performance of optical coupling and to improve the yield of production by forming an optical coupler on a waveguide through a thin film layer of a low refractive index such as prism or diffraction grating substrate formed on the bottom surface of the optical coupler. CONSTITUTION:A Ti is diffused on the surface of a substrate 2 consisting of lithium niobate to form a waveguide 3, and a thin film layer 14 of a low refractive index such as MgF2 is formed by vapor deposition, etc. on the bottom surface of a prism 10 of TiO2. When the prism 10 and the waveguide 3 are joined in fluidized liq. 15 such as pure water and is dried for 3-4hours, the liq. 5 is drawn toward the end of the prism 10 until finally the prism 10 is joined and fixed to the waveguide 3 by intermoledular forces. Since the thin film layer 14 of a low refractive index is interposed, the performance of optical coupling is improved and since the part of the optical coupler 10 and the waveguide 3 can be manufactured separately, the yield of production is improved.