GB1521268A - Distance detecting apparatus - Google Patents

Distance detecting apparatus

Info

Publication number
GB1521268A
GB1521268A GB47730/75A GB4773075A GB1521268A GB 1521268 A GB1521268 A GB 1521268A GB 47730/75 A GB47730/75 A GB 47730/75A GB 4773075 A GB4773075 A GB 4773075A GB 1521268 A GB1521268 A GB 1521268A
Authority
GB
United Kingdom
Prior art keywords
logarithm
output
detector
ratio
outputs
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.)
Expired
Application number
GB47730/75A
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.)
Honeywell Inc
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Publication of GB1521268A publication Critical patent/GB1521268A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line

Abstract

1521268 Automatic focusing HONEYWELL Inc 20 Nov 1975 [4 Dec 1974] 47730/75 Heading H4D In the automatic focusing system described with reference to Fig. 1 of Specification 1,448,424, the inputs A, B, C, D to the signal processor 39, Fig. 1, being the difference between the outputs of corresponding detectors in the two arrays 1, 3, are affected by the average intensity of the images. To overcome this it is proposed to use the ratio of said corresponding detector outputs. A diode 197, 199 &c., or other suitable non-linear element is connected across the output of each detector whereby the input to the differential amplifier becomes the logarithm of the detector output, subtraction of logarithm inputs giving the logarithm of the ratio at the output A &c.
GB47730/75A 1974-12-04 1975-11-20 Distance detecting apparatus Expired GB1521268A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US52957374A 1974-12-04 1974-12-04

Publications (1)

Publication Number Publication Date
GB1521268A true GB1521268A (en) 1978-08-16

Family

ID=24110469

Family Applications (3)

Application Number Title Priority Date Filing Date
GB47730/75A Expired GB1521268A (en) 1974-12-04 1975-11-20 Distance detecting apparatus
GB47729/75A Expired GB1521100A (en) 1974-12-04 1975-11-20 Distance detecting apparatus
GB47731/75A Expired GB1521269A (en) 1974-12-04 1975-11-20 Distance detecting apparatus

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB47729/75A Expired GB1521100A (en) 1974-12-04 1975-11-20 Distance detecting apparatus
GB47731/75A Expired GB1521269A (en) 1974-12-04 1975-11-20 Distance detecting apparatus

Country Status (6)

Country Link
JP (1) JPS5183524A (en)
CA (1) CA1044055A (en)
DE (3) DE2549809C2 (en)
FR (3) FR2293694A1 (en)
GB (3) GB1521268A (en)
HK (3) HK29879A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176963A (en) * 1985-06-05 1987-01-07 Plessey Co Plc Locating power source for rail vehicle

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5642647Y2 (en) * 1976-07-05 1981-10-06
JPS53110823A (en) * 1977-03-10 1978-09-27 Ricoh Co Ltd Optical information processor
JPS6042450B2 (en) * 1977-11-18 1985-09-21 株式会社精工舎 focus detection device
JPS5486426U (en) * 1977-12-01 1979-06-19
DE2813913A1 (en) * 1978-03-31 1979-10-18 Siemens Ag ARRANGEMENT FOR MEASURING THE DISTANCE OR SPEED OF AN OBJECT
DE2813914A1 (en) * 1978-03-31 1979-10-11 Siemens Ag ARRANGEMENT FOR FOCUSING THE IMAGE OF AN OBJECTIVE ON A PICTURE PLANE
JPS5515154A (en) * 1978-07-19 1980-02-02 Fuji Photo Optical Co Ltd Focus light device
DE2838647A1 (en) * 1978-09-05 1980-04-10 Siemens Ag METHOD FOR AUTOMATIC OR SEMI-AUTOMATIC DISTANCE MEASUREMENT AND FOCUSING OF THE IMAGE OF AN OBJECT ON AN IMAGE LEVEL
JPS5545031A (en) * 1978-09-27 1980-03-29 Nippon Kogaku Kk <Nikon> Focus state detector
JPS56132309A (en) * 1980-03-21 1981-10-16 Hoya Corp Automatically focusable binoculars
JPS56143408A (en) * 1980-04-11 1981-11-09 Hoya Corp Automatic focusable binoculars
JPS59101611A (en) * 1982-12-01 1984-06-12 Chinon Kk Focusing control device
EP2635022A1 (en) * 2012-02-29 2013-09-04 Flir Systems AB A method and system for performing alignment of a projection image to detected infrared (IR) radiation information

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2432067A1 (en) * 1973-07-09 1975-01-30 Honeywell Inc FOCUSING SYSTEM FOR OPTICAL DEVICES
US3846629A (en) * 1973-12-06 1974-11-05 Honeywell Inc Sensitivity balancing apparatus for photo responsive detecting circuits

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2176963A (en) * 1985-06-05 1987-01-07 Plessey Co Plc Locating power source for rail vehicle

Also Published As

Publication number Publication date
DE2549760A1 (en) 1976-06-10
DE2549704C2 (en) 1987-02-12
DE2549809A1 (en) 1976-06-10
FR2293693A1 (en) 1976-07-02
DE2549809C2 (en) 1984-07-26
FR2293693B1 (en) 1980-07-04
JPS5183524A (en) 1976-07-22
CA1044055A (en) 1978-12-12
HK29879A (en) 1979-05-11
FR2293692A1 (en) 1976-07-02
GB1521269A (en) 1978-08-16
DE2549704A1 (en) 1976-06-10
FR2293694B1 (en) 1982-04-09
GB1521100A (en) 1978-08-09
HK29779A (en) 1979-05-11
FR2293694A1 (en) 1976-07-02
HK29679A (en) 1979-05-11
FR2293692B1 (en) 1980-08-14

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19951119