JPS5966234U

JPS5966234U - automatic focus device

Info

Publication number: JPS5966234U
Application number: JP16101982U
Authority: JP
Inventors: 忠雄高木
Original assignee: 株式会社ニコン
Priority date: 1982-10-26
Filing date: 1982-10-26
Publication date: 1984-05-02

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案の実施例の考え方を説明するための図、
第２図は実施例の構成を表わすブロック図、第３図は第
２図中の制御回路の具体例を示す回路図、第４図は第２
図中の処理回路の具体例を　　−示す回路図、第５図は
第２図中のモータ駆動回路の具体例を示す回路図である
。〔主要部分の符号の説明〕、撮影レンズ・・・・・・３
、受光手段・・・・・・４．　５．　６．　７、駆動手
段・・・・・・９゜１０．１１、レンズ位置信号発生手
段・・・・・・１３゜１４．１５、布制御手段・・・・
・・１６，１７，１８、処理手段・・・・・・８゜FIG. 1 is a diagram for explaining the concept of an embodiment of the present invention,
FIG. 2 is a block diagram showing the configuration of the embodiment, FIG. 3 is a circuit diagram showing a specific example of the control circuit in FIG. 2, and FIG.
FIG. 5 is a circuit diagram showing a specific example of the processing circuit shown in FIG. 2, and FIG. 5 is a circuit diagram showing a specific example of the motor drive circuit shown in FIG. [Explanation of symbols of main parts], Photographing lens...3
, light receiving means...4. 5. 6. 7. Driving means...9°10.11, Lens position signal generating means...13°14.15, Cloth control means...
...16,17,18, processing means...8°

Claims

[Scope of Claim for Utility Model Registration] 1. A light receiving means for receiving transmitted light of the photographing lens and outputting a signal according to the focusing state of the photographing lens; and a driving means for driving the photographing lens: A device corresponding to the position of the photographing lens. Lens position signal generating means for outputting a signal; at least by specifying an arbitrary position within the entire driving range of the photographic lens, storing a certain driving range around the specified position, and generating the lens position signal; a control means for inputting a signal from the light receiving means and outputting a control signal for preventing the photographing lens from being driven by the driving means beyond the predetermined driving range; 10 control signal to detect the in-focus state of the photographic lens, and output a drive signal to the driving means to drive the photographic lens to the in-focus position within the certain drive range accordingly. An automatic focusing device comprising: processing means; and; 2. The automatic focusing device according to claim 1, wherein the fixed driving range is further determined by manually setting a width before and after the specified position. 3. The automatic focusing device according to claim 1, wherein the fixed driving range is determined only by specifying the specified position. 4. The automatic focusing device according to claim 1, wherein the specified position is a center position in the fixed drive range.