Invention Grant
- Patent Title: Apparatus and method for transmitting ultrasonic wave
- Patent Title (中): 超声波发射装置及方法
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Application No.: US364634Application Date: 1982-04-02
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Publication No.: US4467362APublication Date: 1984-08-21
- Inventor: Wataru Hasegawa , Katsuji Ishikawa
- Applicant: Wataru Hasegawa , Katsuji Ishikawa
- Applicant Address: JPX Osaka
- Assignee: West Electric Company, Ltd.
- Current Assignee: West Electric Company, Ltd.
- Current Assignee Address: JPX Osaka
- Priority: JPX56-54912 19810410
- Main IPC: G01S7/524
- IPC: G01S7/524 ; G01S15/88 ; G02B7/40 ; H04N5/232 ; H04N9/28
Abstract:
An ultrasonic wave transmission apparatus built in an image producing apparatus with an auto-focusing apparatus has features that transmission timings are determined by processing a vertical synchronization signal produced in the video camera and that transmission operations are made within blank times of the vertical synchronization signal thereby eliminating noise troubles in image reproduction made in the video camera.
Public/Granted literature
- US5525703A Crosslinked polyaspartic acid and salts Public/Granted day:1996-06-11
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