公开(公告)号：US3649120A

公开(公告)日：1972-03-14

申请号：US3649120D

申请日：1970-04-06

Applicant: AGFA GEVAERT AG

Inventor： PFEIFER JOSEPH ,  BICKL HORST

IPC: G03B27/72 ,  G03B27/80 ,  G03B27/76

CPC classification number: G03B27/722 ,  G03B27/80

Abstract: A microfilm copying camera of the step-by-step type which permits adjustment of the ratio of the size of the picture to be taken (the copy) to the size of the picture to be copied (the master or original). The camera is provided with a light source of controllable intensity for illuminating the entire master; the light source is controlled by a photometer mounted on the camera and scanning a small test area of the master. The camera has an adjustable lens board, whereby the size of the copy may be varied. The photometer has a light sensitive element mounted in the plane of the camera film, and a lens which scans the test area which is mounted on the camera lens board and has a focal length equal to the focal length of the camera lens. The camera may have a shutter mechanism with a fixed opening and a constant exposure time, the only variable in the taking of the picture then being the variable illumination provided by the controlled light source.

Abstract translation: 一种逐步式的微缩胶片复印机，它允许调整要拍摄的照片（复印件）的大小与要复制的照片的大小（主人或原件）的比例。 相机设有可控制的光源，用于照亮整个主机; 光源由安装在相机上的光度计控制，并扫描主机的小测试区域。 相机具有可调节的透镜板，由此可以改变复印件的尺寸。 光度计具有安装在照相机胶片平面中的感光元件，以及透镜，其扫描安装在照相机镜头板上并具有与照相机镜头焦距相等的焦距的测试区域。 相机可以具有固定开口和恒定曝光时间的快门机构，拍摄照片的唯一变量是由受控光源提供的可变照明。

公开(公告)号：US3582219A

公开(公告)日：1971-06-01

申请号：US3582219D

申请日：1968-09-06

Applicant: AGFA GEVAERT AG

Inventor： PFEIFER JOSEF ,  BICKL HORST

IPC: G03B27/72 ,  G01N21/06 ,  G01N21/16 ,  G01N21/22

CPC classification number: G03B27/72

Abstract: A device for adjusting a microfilm camera so as to achieve uniform illumination at the film gate to expose film in the film plane. The camera has a support means for supporting a film cassette, and the device of the invention includes a baseplate carried by this support means and formed with a gate opening corresponding to that provided by a cassette. A light-sensing means is carried by the baseplate for sensing at predetermined points in the film plane the intensity of light which passes through the gate opening of the baseplate. A moving means is operatively connected with the light-sensing means to move the latter with respect to a pair of mutually perpendicular coordinates. The light-sensing means includes at least one photocell which provides a signal corresponding to the light intensity, and distant from the light-sensing means is a lightindicating means coacting with the light-sensing means to indicate in response to the signal from the photocell the light intensity sensed by the light-sensing means.

公开(公告)号：US3635135A

公开(公告)日：1972-01-18

申请号：US3635135D

申请日：1970-02-18

Applicant: AGFA GEVAERT AG

Inventor： AMBRASCHKA KASIMIR ,  BICKL HORST

IPC: G01J1/04 ,  G01J1/42 ,  G03B27/72 ,  G01J1/02

CPC classification number: G01J1/4219 ,  G01J1/04 ,  G01J1/0455 ,  G01J1/0488 ,  G03B27/72

Abstract: A light-measuring device for microfilm cameras which is adapted to measure in a point-by-point manner the brightness of an object plane. A small area of an object plane is projected by means of suitable light source via a measuring objective lens onto a measuring photoelectric cell. Light-conducting means are optically aligned with the objective lens and the light source. The photoelectric cell is mounted in the light-conducting means and has an end surface which is coplanar with an end surface of the light-conducting means. The measuring objective lens serves to also project a pattern of light defined by the shape of the end surface of the light-conducting means onto the object plane.

Abstract translation: 一种用于微缩胶片相机的光测量装置，其适于逐点测量物平面的亮度。 通过适当的光源通过测量物镜将物平面的小面积投影到测量光电池上。 导光装置与物镜和光源光学对准。 光电池被安装在导光装置中，并且具有与导光装置的端面共面的端面。 测量物镜还用于将由导光装置的端面形状限定的光线投影到物平面上。