公开(公告)号：US3794416A

公开(公告)日：1974-02-26

申请号：US3794416D

申请日：1972-05-22

Applicant: BELL & HOWELL CO

Inventor： JOHNSTON R

IPC: G03B41/10

CPC classification number: G03B41/10

Abstract: Fiducial markings having different relative contrasts are sensed from an information carrier. Different first electric signals corresponding, respectively, to the different relative contrasts are generated in response to the fiducial markings. Sensing signals indicative of the fiducial markings substantially independently of the different relative contrasts are produced by converting the different first electric signals into corresponding second electric signals having at least one common characteristic.

Abstract translation: 从信息载体中检测出具有不同相对对比度的基准标记。 响应于基准标记产生分别对应于不同相对对比度的不同的第一电信号。 通过将不同的第一电信号转换成具有至少一个共同特征的相应的第二电信号，产生表示基本标记基本上与不同相对对比度无关的感测信号。

公开(公告)号：US3719418A

公开(公告)日：1973-03-06

申请号：US3719418D

申请日：1971-08-27

Applicant: BELL & HOWELL CO

Inventor： JOHNSTON R ,  HENDRICKSON K

IPC: G03B41/10

CPC classification number: G03B41/10

Abstract: A repeatedly advanced device, such as an optical compensator or rectifier in continuous film feed motion picture apparatus, is reset between successive advancements with the aid of resetting energy. Errors in the resetting of the device are sensed and an error signal is controlled with the error signal to correct errors in the resetting of the device.

Abstract translation: 借助于复位能量，连续进给运动图像装置中的重复先进装置，例如光学补偿器或整流器在连续进给之间被复位。 检测设备复位的错误，并用错误信号控制错误信号，以纠正设备复位中的错误。

公开(公告)号：US3713733A

公开(公告)日：1973-01-30

申请号：US3713733D

申请日：1971-08-27

Applicant: BELL & HOWELL CO

Inventor： JOHNSTON R

IPC: G03B41/10

CPC classification number: G03B41/10

Abstract: Fiducial markings having different relative contrasts are sensed from films in continuous film feed motion picture apparatus. Different first electric signals corresponding, respectively, to the different relative contrasts are generated in response to the fiducial markings. Sensing signals indicative of the fiducial markings substantially independently of the different relative contrasts are produced by converting the different first electric signals into corresponding second electric signals having at least one common characteristic. A film motion compensator is controlled with these second electric signals.

Abstract translation: 具有不同相对对比度的基准标记由连续胶片馈送电影设备中的膜检测。 响应于基准标记产生分别对应于不同相对对比度的不同的第一电信号。 通过将不同的第一电信号转换成具有至少一个共同特征的相应的第二电信号，产生表示基本标记基本上与不同相对对比度无关的感测信号。 用这些第二电信号控制胶片运动补偿器。