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51. 发明授权

US4419000A Camera capable of automatic film advancing and rewinding 失效
标题翻译：相机能够自动胶片前进和倒带
公开(公告)号：US4419000A
公开(公告)日：1983-12-06
申请号：US312569
申请日：1981-10-19
申请人： Fumio Yoshida , Yukio Miki , Takeshi Egawa
发明人： Fumio Yoshida , Yukio Miki , Takeshi Egawa
IPC分类号： G03B17/00 , G03B17/42 , G03B19/12 , G03B1/12
CPC分类号： G03B17/425
摘要： A single lens reflex camera includes a body member having an intermediate compartment containing the photographic and view finding light paths, the shutter, reflex mirror and mirror viewing components and a pair of opposite side compartments respectively housing the film takeup and rewind mechanisms. A motor is housed in a first of the side compartments and a transmission shaft extends from the mechanism in the second compartment to the first compartment through a space offset from the light paths and a selector mechanism alternatively drive couples the transmission shaft at the first compartment housed film mechanism. The selector mechanism is controlled by an externally accessible knob or is responsive to the direction of rotation of the motor.
摘要翻译：单个镜头反射照相机包括具有包含照相和查找光路的中间隔室的主体构件，快门，反射镜和镜子观察部件以及分别容纳胶卷卷绕和倒带机构的一对相对侧隔室。电动机容纳在第一侧室中，并且传动轴通过偏离光路的空间从第二隔室中的机构延伸到第一隔间，并且选择器机构交替地将传动轴连接在第一隔室处电影机制。选择器机构由外部可触及的旋钮控制或响应于电动机的旋转方向。

52. 发明授权

US4309078A Pentagonal prism for camera viewfinder 失效
标题翻译：五角棱镜用于相机取景器
公开(公告)号：US4309078A
公开(公告)日：1982-01-05
申请号：US147532
申请日：1980-05-07
申请人： Kyoichi Hara , Yasuo Yamazaki , Takeshi Egawa
发明人： Kyoichi Hara , Yasuo Yamazaki , Takeshi Egawa
IPC分类号： G03B13/26 , G02B5/04 , G02B27/00 , C03C3/10 , C03C3/30
CPC分类号： G02B27/0018 , G02B5/04 , Y10S501/903
摘要： A pentagonal prism for use in a viewfinder of a single lens reflex camera is made of a glass whose refractive index and Abbe number are not less than 1.6 and 45, respectively. Effective optical path regions on a pair of roof surfaces of the prism are left transparent so that viewfinder light can be totally reflected at both of the roof surfaces. A light absorbing paint is coated in an upper front surface, a pair of said surfaces of the prism as well as at regions other than effective optical path region of the roof surfaces, a bottom light incident surface and a rear light exit surface of the prism. The light absorbing paint prevents the occurrence of ghost images in the view field of the viewfinder. New type glasses suited for the prism are proposed.
摘要翻译：用于单镜头反光相机的取景器的五棱镜由折射率和阿贝数分别不小于1.6和45的玻璃制成。在棱镜的一对屋顶表面上的有效光路区域保持透明，使得取景器光可以在两个屋顶表面被完全反射。光吸收涂料涂覆在上前表面，一对棱镜的所述表面以及除屋顶表面的有效光路区域之外的区域，棱镜的底部光入射表面和后光出射表面。光吸收涂料可以防止取景器视野中出现重影。提出了适用于棱镜的新型眼镜。

53. 发明授权

US4217048A Viewfinder capable of adjusting diopter 失效
标题翻译：取景器能调节屈光度
公开(公告)号：US4217048A
公开(公告)日：1980-08-12
申请号：US20170
申请日：1979-03-13
申请人： Takeshi Egawa
发明人： Takeshi Egawa
IPC分类号： G03B13/02 , G02B7/02 , G02B25/00 , G03B19/12 , G02C7/08 , G02C7/14
CPC分类号： G03B19/12
摘要： An improved eyepiece for a viewfinder of a single lens reflex camera is provided. This improved eyepiece is capable of adjusting both the diopter and astigmatism correction to the demands of the individual user. The eyepiece includes a negative meniscus lens element convex to the object side and a stationary positive lens element. As the negative lens element is movable along the optical axis it adjusts the diopter of the viewfinder. A pair of relatively rotatable prisms is capable of providing variable astigmatism correction.
摘要翻译：提供了用于单个镜头反光相机的取景器的改进的目镜。这种改进的目镜能够根据个人用户的要求调节屈光度和散光校正。目镜包括朝向物体侧凸出的负弯月形透镜元件和固定的正透镜元件。由于负透镜元件可沿着光轴移动，因此调节取景器的屈光度。一对相对可旋转的棱镜能够提供可变的散光校正。

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