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    • 75. 发明授权
    • Focusing screen
    • 聚焦屏幕
    • US5081545A
    • 1992-01-14
    • US713601
    • 1991-06-11
    • Saburo SugawaraToshiharu TakahashiHideaki YudaMoriyasu Shirayanagi
    • Saburo SugawaraToshiharu TakahashiHideaki YudaMoriyasu Shirayanagi
    • G02B3/00G02B5/02G02B27/40G03B13/24
    • G02B3/0043G02B27/40G02B3/0056G02B5/0215G02B5/0221G02B5/0278G03B13/24
    • A focusing screen for use in the finder system of a camera such as a single-lens reflex camera, and a method of forming a microstructure array suitable for use in the production of such a focusing screen. The focusing screen includes an optical material in plate form having on one surface a plurality of small lens portions that project in a regular array of equilateral triangles from the optical material and each of which has concentric contour lines, with a central apex. A flat portion is formed between adjacent small lens portions and a constricted portion is formed in the middle portion of the inclined surface of each small lens portion, with an irregular pattern of finer asperities is formed on the surfaces of the small lens portions and the flat portion. The high and low spots can be reversed. The method of forming a microstructure array includes the steps of forming a fine pattern of elements on a layer of light-sensitive material capable of transforming a distribution of light intensity to a surface relief by exposing the layer through a microlens array to rays of light with an intensity distribution corresponding to individual elements of the fine pattern. The microlens array may be replaced with a group of pinholes.
    • 用于诸如单镜头反光相机的照相机的取景器系统中的聚焦屏幕,以及形成适用于生产这种聚焦屏幕的微结构阵列的方法。 聚焦屏幕包括板形光学材料,其具有在一个表面上的多个小透镜部分,其以光学材料突出成等角三角形的规则阵列,并且每个都具有同心的轮廓线和中心顶点。 在相邻的小透镜部分之间形成平坦部分,并且在每个小透镜部分的倾斜表面的中间部分中形成缩颈部分,在小透镜部分和平面部分的表面上形成不规则图案的较细的凹凸 一部分。 高低点可以颠倒。 形成微结构阵列的方法包括以下步骤:在光敏材料层上形成精细的元件图案,该光敏材料层能够通过将微透镜阵列暴露于光线阵列中而将光强度的分布转变为表面浮雕, 对应于精细图案的各个元件的强度分布。 微透镜阵列可以被一组针孔代替。
    • 78. 发明授权
    • Lens shutter camera including zoom lens
    • 镜头快门摄像头包括变焦镜头
    • US4944030A
    • 1990-07-24
    • US144030
    • 1988-01-07
    • Keisuke HaraguchiShinsuke KohmotoTakeo KobayashiShigeru KondohHideki OhkuboNorio NumakoSaburo SugawaraSusao NakamuraHirofumi MatsuoKatsuhiko NomuraEtsuro NishioHaruo Ishii
    • Keisuke HaraguchiShinsuke KohmotoTakeo KobayashiShigeru KondohHideki OhkuboNorio NumakoSaburo SugawaraSusao NakamuraHirofumi MatsuoKatsuhiko NomuraEtsuro NishioHaruo Ishii
    • G02B7/10G02B23/14G03B13/12G03B17/04G03B3/00G03B5/00G03B15/03
    • G03B13/12G02B7/102G03B17/04G02B23/145G03B2215/0503G03B2217/002
    • A lens shutter type of camera is disclosed in which a zoom lens is positioned in a lens block (1) which has a sector gear (15) rotatably associated with the lens block and with a rotatable cam ring (14). The cam ring and sector gear are rotatable in a substantially constant axial position. A movable finder optical assembly (8) and a movable strobe assembly (9) are movable in association with movement of the zoom lens. The zoom lens is movable between an extreme telephoto position and an extreme wide angle position, as well as into a fully collapsed lens position beyond the extreme wide angle position and a macro or closeup photographing position beyond the extreme telephoto position. When the camera is in its macro mode, a prism (P1) is inserted into the finder optical assembly to correct for parallax; the strobe assembly is moved to change its illumination angle; and an optical wedge (4e) is pivoted into the path between a light receiver (4) and a light emitter (3e). A single cam plate (53) is provided to move the finder assembly and the strobe assembly. The photographic aperture (22b) can be selectively closed by barrier plates (31a) when the zoom lens is moved into its fully collapsed position. A light intercepting assembly (210) is provided for preventing light from entering the photographic optical assembly via cam grooves (20 and 21).
    • PCT No.PCT / JP87 / 00293 Sec。 371日期:1988年1月7日 102(e)日期1988年1月7日PCT提交1987年5月12日PCT公布。 第WO87 / 07038号公报 公开了一种镜头遮挡式照相机,其中变焦镜头位于透镜块(1)中,透镜块(1)具有扇形齿轮(15),该扇形齿轮(15)可旋转地与透镜块相关联并具有可旋转的凸轮环( 14)。 凸轮环和扇形齿轮可在基本上恒定的轴向位置旋转。 移动取景器光学组件(8)和可移动闪光灯组件(9)可随变焦镜头的移动而移动。 变焦镜头可以在极远摄位置和极广角位置之间移动,也可以超过极宽广角位置的完全折叠的镜头位置,以及超过远摄位置的宏观或特写拍摄位置。 当相机处于其微距模式时,将棱镜(P1)插入取景器光学组件中以校正视差; 移动闪光灯组件以改变其照明角度; 并且光楔(4e)枢转到光接收器(4)和光发射器(3e)之间的路径中。 提供单个凸轮板(53)以移动取景器组件和闪光灯组件。 当变焦镜头移动到其完全折叠位置时,照相孔(22b)可以被阻挡板(31a)选择性地关闭。 提供遮光组件(210),用于防止光经由凸轮槽(20和21)进入照相光学组件。