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Super wide angle zoom strobe apparatus and zoom compact camera having zoom strobe device

机译:超广角变焦闪光灯装置和具有变焦闪光灯装置的变焦紧凑型相机

摘要

A zoom strobe device suitable for a super wide angle, in which a distance between a reflector, which is provided on the base thereof with a rod-shaped tubular light emitting tube and a Fresnel lens, is varied to vary a flash angle of illumination, wherein the zoom strobe device satisfies the following conditions (1) and (2): ;wherein &phgr; designates the resultant power of the Fresnel lens in an upward/downward direction perpendicular to the length of the rod-shaped light emitting tube, Lw designates the distance between the base of the reflector and an outer surface of the Fresnel lens when the reflector is located closest to the Fresnel lens, and H designates the maximum length of the strobe device in the upward/downward direction.
机译:一种适用于超广角的变焦频闪装置,其中改变了在其底部设有杆状管状发光管的反射器与菲涅耳透镜之间的距离,以改变照明的闪光角度,其中,所述变焦频闪装置满足以下条件(1)和(2):其中表示在垂直于棒状发光管的长度的向上/向下方向上的菲涅耳透镜的合成光焦度,Lw表示当反射镜位于反光镜底部和菲涅耳透镜外表面之间的距离最接近菲涅耳透镜,H表示闪光灯装置在向上/向下方向上的最大长度。

著录项

  • 公开/公告号US2004037549A1

    专利类型

  • 公开/公告日2004-02-26

    原文格式PDF

  • 申请/专利权人 PENTAX CORPORATION;

    申请/专利号US20030641043

  • 发明设计人 TAKAAKI YANO;

    申请日2003-08-15

  • 分类号G03B15/06;

  • 国家 US

  • 入库时间 2022-08-21 23:15:50

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