Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1986-05-19
1988-04-05
Corbin, John K.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
350320, 358227, G02B 710, G02B 1514, H04N 5232
Patent
active
047354941
ABSTRACT:
The present invention user plural driving speeds of the focusing lens component of a zoom lens which responds to plural separate control regions of focal length and object position. In each control region, the focusing lens component is driven in predetermined suitable constant speed. By this operation the object is nearly focused on the focal plane. The slight discrepancy between the image position of the object and the ideal plane is regarded as zero.
REFERENCES:
patent: 4054372 (1977-10-01), Schroeder
patent: 4161756 (1979-07-01), Thomas
patent: 4531157 (1985-07-01), Ishikawa
Kihara Tadaharu
Makino Hiroshi
Takashima Akira
Ben Loha
Corbin John K.
West Electric Company Ltd.
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