Photography – With exposure objective focusing means – focusing aid – or... – Having auxiliary illumination
Patent
1995-04-19
1997-03-25
Adams, Russell E.
Photography
With exposure objective focusing means, focusing aid, or...
Having auxiliary illumination
2502061, G03B 1336
Patent
active
056149840
ABSTRACT:
A distance measuring device for ensuring accuracy of the positional relationship between the optical axis of a light-receiving lens and the optical center of a light-receiving element obtains distance information data by measuring the distance to a target plate which is 1 meter from the distance measuring device. If the distance information is not smaller than 1.625 meter, a switch is connected to one pair of terminals and the difference between reference output data stored in a control circuit and output data of an AF-IC obtained when the distance to the target plate is measured with the switch connected to the pair of terminals is calculated and stored in a memory circuit. When the value of the distance information data is not greater than 0.375 meter, the switch is connected to another pair of terminals, and output deviation data is stored in the memory circuit 11 in the same way. When the value of the distance information value is smaller than 1.625 meter and greater than 0.375 meter, the switch is connected to a further pair of terminals, and output deviation data is stored in the memory circuit in the same way.
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Aoyama Tomihiko
Ito Akira
Kawai Michio
Seki Yoichi
Adams Russell E.
Seikosha Co. Ltd.
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