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1. 发明授权

US4998128A Preflash measurement technique 失效
标题翻译：预闪测量技术
公开(公告)号：US4998128A
公开(公告)日：1991-03-05
申请号：US414267
申请日：1989-09-29
申请人： Judith N. Coltman , John P. Gaewsky , Jeffrey T. Gray
发明人： Judith N. Coltman , John P. Gaewsky , Jeffrey T. Gray
IPC分类号： G03B7/16
CPC分类号： G03B7/16
摘要： An automatic exposure system for an electronic flash camera incorporates an arrangement for measuring the reflectivity of a scene illuminated by the electronic flash prior to exposure in order to determine certain photographic scene characteristics for use in controlling a subsequent photographic exposure, an arrangement that substantially reduces the complexity and energy consumption of the electronic flash system while improving the ability of the exposure control system to accurately determine these characteristics. The arrangement includes the pre-exposure firing of the electronic flash to illuminate a scene with a pulse of light for a short, fixed period of time. A reflection of this light pulse is integrated for a portion of this fixed period of time. The final integrated value of the reflected light is a measure of subject reflectivity. This integrated value is then employed to derive the desired photographic scene characteristics.
摘要翻译：用于电子闪光照相机的自动曝光系统包括用于测量在曝光之前由电子闪光灯照亮的场景的反射率的装置，以便确定用于控制随后的照相曝光的某些摄影场景特性，基本上减少电子闪光灯系统的复杂性和能量消耗，同时提高了曝光控制系统准确地确定这些特性的能力。该装置包括电子闪光灯的预曝光点火，以短时间固定的时间段以光脉冲照亮场景。该光脉冲的反射在该固定时间段的一部分被积分。反射光的最终积分值是对象反射率的度量。然后使用该积分值来导出所需的摄影场景特征。

2. 发明授权

US4876566A Camera having auto-trim exposure control 失效
标题翻译：相机具有自动调整曝光控制
公开(公告)号：US4876566A
公开(公告)日：1989-10-24
申请号：US258879
申请日：1988-10-17
申请人： Peter P. Carcia , Judith N. Coltman
发明人： Peter P. Carcia , Judith N. Coltman
IPC分类号： G02B7/40 , G03B7/091 , G03B7/16 , G03B17/52
CPC分类号： G03B17/52 , G02B7/40 , G03B7/091 , G03B7/16
摘要： An exposure control system in a self-developing camera having a user trim adjustment for manually varying the exposure time of a picture over a limited range of exposure times is provided with a photocell for measuring the level of ambient light in a scene to be photographed and a memory for temporarily storing this scene light information. If after taking a picture of a particular scene the camera operator determines that the resulting photograph was either too light or too dark and chooses to take another picture of the particular scene, the trim control is manually adjusted to obtain the desired picture brightness level. In the present arrangement, when the particular scene is re-framed and the trim control is adjusted, the ambient scene light information stored in memory is varied, and not the ambient scene light subsequently sensed by the photocell in order to compensate for the fact that upon re-framing the scene the photocell sees a different portion of the same scene and therefore a different ambient scene light level and that the intent of the operator in such instances is to alter the exposure time relating to the initial scene that produced the unwanted scene light conditions and not that relating to the re-framed scene.
摘要翻译：具有用于在有限曝光时间范围内手动改变图像的曝光时间的用户调整调整的自拍照相机中的曝光控制系统设置有用于测量要拍摄的场景中的环境光的水平的光电管，用于临时存储该场景光信息的存储器。如果在拍摄特定场景的照片后，相机操作员确定所得照片太亮或太暗，并选择拍摄特定场景的另一张照片，则手动调节裁剪控制以获得所需的图像亮度级别。在当前的布置中，当特定场景被重新构图并且修整调整时，存储在存储器中的环境场景光信息是变化的，而不是随后由光电管感测到的环境场景光，以补偿以下事实：在重新构图场景时，光电池看到相同场景的不同部分，因此可以看到不同的环境场景亮度，并且在这种情况下操作者的意图是改变与产生不需要的场景的初始场景相关的曝光时间光线条件而不是与重构场景有关。

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