DE3443558

The disclosed automatic focus adjusting device is of the active type whose focusing apparatus becomes operative either when an image of an object goes out of focus, or when the object image has started to move. In one embodiment, a first detecting circuit receptive of index signals reflected from th...

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1. Verfasser:	TOYAMA, MASAMICHI, MACHIDA, TOKIO/TOKYO, JP
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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creator	TOYAMA, MASAMICHI, MACHIDA, TOKIO/TOKYO, JP
description	The disclosed automatic focus adjusting device is of the active type whose focusing apparatus becomes operative either when an image of an object goes out of focus, or when the object image has started to move. In one embodiment, a first detecting circuit receptive of index signals reflected from the object detects when the object becomes out of focus based on the high frequency component of the index signal. A second detecting circuit also receptive of index signals reflected from the object detects when the object has moved. An automatic focus control circuit reinstitutes the focusing operation in response to either or both of the detecting circuits. Accordingly, an in-focus object is kept in-focus despite changes in object brightness or movement.
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In one embodiment, a first detecting circuit receptive of index signals reflected from the object detects when the object becomes out of focus based on the high frequency component of the index signal. A second detecting circuit also receptive of index signals reflected from the object detects when the object has moved. An automatic focus control circuit reinstitutes the focusing operation in response to either or both of the detecting circuits. 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In one embodiment, a first detecting circuit receptive of index signals reflected from the object detects when the object becomes out of focus based on the high frequency component of the index signal. A second detecting circuit also receptive of index signals reflected from the object detects when the object has moved. An automatic focus control circuit reinstitutes the focusing operation in response to either or both of the detecting circuits. Accordingly, an in-focus object is kept in-focus despite changes in object brightness or movement.</description><subject>ACCESSORIES THEREFOR</subject><subject>APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES</subject><subject>APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM</subject><subject>CINEMATOGRAPHY</subject><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRICITY</subject><subject>ELECTROGRAPHY</subject><subject>HOLOGRAPHY</subject><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</subject><subject>OPTICS</subject><subject>PHOTOGRAPHY</subject><subject>PHYSICS</subject><subject>PICTORIAL COMMUNICATION, e.g. TELEVISION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1990</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZOB0cTU2MTE2NbXgYWBNS8wpTuWF0twMCm6uIc4euqkF-fGpxQWJyal5qSXxcPXORsZEKAEAzykafw</recordid><startdate>19900503</startdate><enddate>19900503</enddate><creator>TOYAMA, MASAMICHI, MACHIDA, TOKIO/TOKYO, JP</creator><scope>EVB</scope></search><sort><creationdate>19900503</creationdate><title>DE3443558</title><author>TOYAMA, MASAMICHI, MACHIDA, TOKIO/TOKYO, JP</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_DE3443558C23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1990</creationdate><topic>ACCESSORIES THEREFOR</topic><topic>APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES</topic><topic>APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM</topic><topic>CINEMATOGRAPHY</topic><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>ELECTROGRAPHY</topic><topic>HOLOGRAPHY</topic><topic>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</topic><topic>OPTICS</topic><topic>PHOTOGRAPHY</topic><topic>PHYSICS</topic><topic>PICTORIAL COMMUNICATION, e.g. TELEVISION</topic><toplevel>online_resources</toplevel><creatorcontrib>TOYAMA, MASAMICHI, MACHIDA, TOKIO/TOKYO, JP</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>TOYAMA, MASAMICHI, MACHIDA, TOKIO/TOKYO, JP</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>DE3443558</title><date>1990-05-03</date><risdate>1990</risdate><abstract>The disclosed automatic focus adjusting device is of the active type whose focusing apparatus becomes operative either when an image of an object goes out of focus, or when the object image has started to move. In one embodiment, a first detecting circuit receptive of index signals reflected from the object detects when the object becomes out of focus based on the high frequency component of the index signal. A second detecting circuit also receptive of index signals reflected from the object detects when the object has moved. An automatic focus control circuit reinstitutes the focusing operation in response to either or both of the detecting circuits. Accordingly, an in-focus object is kept in-focus despite changes in object brightness or movement.</abstract><oa>free_for_read</oa></addata></record>
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subjects	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
title	DE3443558
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