JPS6291616U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の実施例装置を示すブロツク図
、第２図は各種信号のタイムチヤートである。 １……発信部、２……発信制御部、３……受信
部、４……発信判別部、５……ゲート回路、６…
…測距部、７……焦点調節部。 FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a time chart of various signals. DESCRIPTION OF SYMBOLS 1... Transmission section, 2... Transmission control section, 3... Receiving section, 4... Transmission determination section, 5... Gate circuit, 6...
... Distance measuring section, 7... Focus adjustment section.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] アクテイブ方式のオートフオーカス装置におい
て、測距のための赤外光や超音波等を被写体に向
けて発信する発信部と、前記発信部の発信および
発信タイミングを制御すると共に発信予告信号を
出力する発信制御部と、前記発信部の発信および
それと類似の発信を被写体からの反射によつて受
信する受信部と、前記発信制御部からの発信予告
信号を入力してから一定時間の半別期間前記受信
部からの受信信号の有無を判別し受信信号が有る
ときは前記発信部の発信を規定時間遅延し発信信
号が無いときは通常の発信をさせる判別出力を前
記発信制御部に送出する発信判別部と、前記判別
出力によつて回路を閉じるゲート回路と、前記発
信判別部の判別出力によつて前記ゲート回路が閉
成したとき前記受信部からの受信信号を前記ゲー
ト回路を通して入力し被写体までの距離を測定す
る測距部と、この測距部からの出力に従つて焦点
調節を行う焦点調節部とから構成されたことを特
徴とするオートフオーカス装置。 An active type autofocus device includes a transmitter that transmits infrared light, ultrasonic waves, etc. for distance measurement toward a subject, controls the transmitter's transmitter and transmit timing, and outputs a transmission warning signal. a transmission control unit; a reception unit that receives the transmission from the transmission unit and similar transmissions by reflection from the subject; A transmission determination unit that determines the presence or absence of a reception signal from the reception unit, and when there is a reception signal, delays the transmission of the transmission unit for a specified time, and when there is no transmission signal, sends a determination output to the transmission control unit to cause the transmission unit to make a normal transmission. a gate circuit that closes the circuit according to the discrimination output of the transmission discrimination section; and a gate circuit that closes the circuit according to the discrimination output of the transmission discrimination section; and when the gate circuit is closed according to the discrimination output of the transmission discrimination section, the received signal from the reception section is inputted through the gate circuit to the subject. What is claimed is: 1. An autofocus device comprising: a distance measuring section that measures a distance; and a focus adjustment section that adjusts focus according to an output from the distance measuring section.