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31. 发明专利

JPH0464134B2 失效
公开(公告)号：JPH0464134B2
公开(公告)日：1992-10-14
申请号：JP27894484
申请日：1984-12-28
申请人： HAMAMATSU PHOTONICS KK
发明人： HARA TSUTOMU , SHINODA KAZUNORI , ICHE KOJI
IPC分类号： H01J31/24 , G02F1/03 , H01J31/50

32. 发明专利

JPS61249018A SPACE OPTICAL MODULATOR 失效
公开(公告)号：JPS61249018A
公开(公告)日：1986-11-06
申请号：JP9062185
申请日：1985-04-26
申请人： HAMAMATSU PHOTONICS KK
发明人： HARA TSUTOMU , SHINODA KAZUNORI , OI YOSHIHARU
IPC分类号： G02F1/05 , G02F1/03 , H01J31/24 , H01J31/50
摘要： PURPOSE:To pass all of light through crystal for compensation and to improve an SN ratio and contrast by providing a nonreflective coating to the surface of an electrooptic crystal part on the side of a readout light source and the passing surface of the crystal for compensation. CONSTITUTION:A transparent conductive multilayered film 120f is formed on the photoelectric surface of the electrooptic crystal 120 put in the glass container 3 of a space optical modulator and a transparent conductive film 120g is formed on the other surface. An SiO2 layer 120h is formed by sputtering and vapor deposition to thickness lambda/4n except at the electrode wiring part of the peripheral part of the conductive film 120g. Further, both surfaces of the electrooptic crystal 122 for compensation are coated with SiO2 layers 122f and 122g to thickness lambda/4n. Those SiO2 layers 120h, 122f, and 122g are used as nonreflective coating layers. Further, both surfaces of a lambda/2 plate 121 made of quartz are coated with MgF2 films 121f and 121g to thickness lambda/4n. Then, all of light is passed through the crystal 122 to remove noises which are not an object of compensation, thereby improving the SN ratio and contrast.

33. 发明专利

JPS61158654A SPACE LIGHT MODULATOR 失效
公开(公告)号：JPS61158654A
公开(公告)日：1986-07-18
申请号：JP27894484
申请日：1984-12-28
申请人： HAMAMATSU PHOTONICS KK
发明人： HARA TSUTOMU , SHINODA KAZUNORI , ICHIE KOJI
IPC分类号： H01J31/24 , G02F1/03 , H01J31/50
摘要： PURPOSE:To improve the resolution through natural complex reflection by arranging a compensation crystal of same material and approximately same thickness with photoelectric crystal section and an optical element for rotating the polarization face by 90 deg. at the light source side of the photoelectric crystal section. CONSTITUTION:Photo-electrons emitted with correspondence to the incident image from the photoelectric face 4 of a space light modulation tube 3 are accelerated and focused onto a micro-channel plate 6 and accumulated at photoe lectric crystal section 20 composed of LiNbO3 crystal board cut into 55 deg. to vary the refractive index with correspondence to the image. While laser light from a light source 24 is irradiated through a half mirror 9, a compensation crystal 22 of same material and approximately same thickness with said crystal section 20 and a half wave length quartz board 21 for rotating the polarization face by 90 deg. onto said crystal section 20 thus to produce a coherent image 11. Consequently, normal light and abnormal light to be separated through a crystal having natural complex reflection can pass through same light path length resulting in improvement of resolution.

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