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JPS5654418A - Focusing detection system - Google Patents

Focusing detection system

Info

Publication number
JPS5654418A
JPS5654418A JP13137379A JP13137379A JPS5654418A JP S5654418 A JPS5654418 A JP S5654418A JP 13137379 A JP13137379 A JP 13137379A JP 13137379 A JP13137379 A JP 13137379A JP S5654418 A JPS5654418 A JP S5654418A
Authority
JP
Japan
Prior art keywords
evaluation
adjustment
function
evaluating
cpu
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13137379A
Other languages
Japanese (ja)
Inventor
Takeomi Suzuki
Masahiro Aoki
Kenichi Oikami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP13137379A priority Critical patent/JPS5654418A/en
Publication of JPS5654418A publication Critical patent/JPS5654418A/en
Pending legal-status Critical Current

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  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To make possible rapid and accurate focusing detection by using the evaluation function value which is optimum for either one fousing state of evaluation function values for rough adjustment and fine adjusting, in evaluating the resolution of images.
CONSTITUTION: When the image light distribution detection signals constituted by the photoelectric transducer array formed by respectively K pieces of photodetectors provided at a fixed optical distance by way of a plane conjugate with the focal plane of an imaging lens are applied to a CPU 5 via a signal processing circuit, the CPU 5 arithmetically operates evaluation functions S', S for rough adjustment and fine adjustment for every photoelectric transducer arrays based on the formulas I, II. When the function S is above the threshold value, this is used and when it is below the same, the function, S' is used in evaluating the image sharpness and the movement of the lens 2 is controlled by way of an optical system drive control circuit 7 and an optical system drive unit 8. The focusing detection may be performed rapidly, and accurately by the evaluation and adjustment corresponding to the deviation from this focusing position.
COPYRIGHT: (C)1981,JPO&Japio
JP13137379A 1979-10-11 1979-10-11 Focusing detection system Pending JPS5654418A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13137379A JPS5654418A (en) 1979-10-11 1979-10-11 Focusing detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13137379A JPS5654418A (en) 1979-10-11 1979-10-11 Focusing detection system

Publications (1)

Publication Number Publication Date
JPS5654418A true JPS5654418A (en) 1981-05-14

Family

ID=15056413

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13137379A Pending JPS5654418A (en) 1979-10-11 1979-10-11 Focusing detection system

Country Status (1)

Country Link
JP (1) JPS5654418A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013072988A (en) * 2011-09-27 2013-04-22 Sharp Corp Compound eye camera, continuous automatic focus control method using the same, control program and readable storage medium
JP2021520519A (en) * 2018-05-01 2021-08-19 ナノトロニクス イメージング インコーポレイテッドＮａｎｏｔｒｏｎｉｃｓ Ｉｍａｇｉｎｇ，Ｉｎｃ． Microscope autofocus system, equipment and methods

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013072988A (en) * 2011-09-27 2013-04-22 Sharp Corp Compound eye camera, continuous automatic focus control method using the same, control program and readable storage medium
JP2021520519A (en) * 2018-05-01 2021-08-19 ナノトロニクス イメージング インコーポレイテッドＮａｎｏｔｒｏｎｉｃｓ Ｉｍａｇｉｎｇ，Ｉｎｃ． Microscope autofocus system, equipment and methods
US11796785B2 (en) 2018-05-01 2023-10-24 Nanotronics Imaging, Inc. Systems, devices and methods for automatic microscope focus

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