GB1418393A - Automatic contrast and dark level control for scanning electron microscopes - Google Patents

Automatic contrast and dark level control for scanning electron microscopes

Info

Publication number
GB1418393A
GB1418393A GB444773A GB444773A GB1418393A GB 1418393 A GB1418393 A GB 1418393A GB 444773 A GB444773 A GB 444773A GB 444773 A GB444773 A GB 444773A GB 1418393 A GB1418393 A GB 1418393A
Authority
GB
United Kingdom
Prior art keywords
video signal
dark level
scanning electron
level control
contrast
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
GB444773A
Other languages
English (en)
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.)
ETEC CORP
Original Assignee
ETEC CORP
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 ETEC CORP filed Critical ETEC CORP
Publication of GB1418393A publication Critical patent/GB1418393A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/26—Electron or ion microscopes; Electron or ion diffraction tubes
    • H01J37/28—Electron or ion microscopes; Electron or ion diffraction tubes with scanning beams

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Television Receiver Circuits (AREA)
  • Closed-Circuit Television Systems (AREA)
GB444773A 1972-04-24 1973-01-29 Automatic contrast and dark level control for scanning electron microscopes Expired GB1418393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US247072A US3886305A (en) 1972-04-24 1972-04-24 Automatic contrast and dark level control for scanning electron microscopes

Publications (1)

Publication Number Publication Date
GB1418393A true GB1418393A (en) 1975-12-17

Family

ID=22933442

Family Applications (1)

Application Number Title Priority Date Filing Date
GB444773A Expired GB1418393A (en) 1972-04-24 1973-01-29 Automatic contrast and dark level control for scanning electron microscopes

Country Status (4)

Country Link
US (1) US3886305A (enExample)
JP (2) JPS5710541B2 (enExample)
DE (1) DE2318023A1 (enExample)
GB (1) GB1418393A (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987242A (en) * 1974-04-24 1976-10-19 American Optical Corporation Automatic dc restorer and gain control
JPS5227313A (en) * 1975-08-27 1977-03-01 Hitachi Ltd Automated picture tone control photographing method and its device
JPS5245256A (en) * 1975-09-25 1977-04-09 Hitachi Ltd Peak value holding circuit
NL7800869A (nl) * 1978-01-25 1979-07-27 Philips Nv Elektronenmikroskoop.
JPS58184761U (ja) * 1982-06-03 1983-12-08 日本電子株式会社 走査電子顕微鏡の自動利得レベル制御装置
CA1208763A (en) * 1983-03-31 1986-07-29 Ryuichi Shimizu Scan line type dynamic observation apparatus
JPS61173590A (ja) * 1985-01-29 1986-08-05 Fuji Photo Film Co Ltd モニタ−装置の自動較正回路
JPS63127148A (ja) * 1986-11-17 1988-05-31 Kanzaki Paper Mfg Co Ltd 表面検査装置
US4947253A (en) * 1989-04-18 1990-08-07 Rca Licensing Corporation Brightness modulator for closed loop compensation of black level
US5065443A (en) * 1989-12-04 1991-11-12 Allen-Bradley Company, Inc. Image processor with illumination variation compensation
JPH04326056A (ja) * 1991-04-25 1992-11-16 Olympus Optical Co Ltd 超音波顕微鏡
US5332898A (en) * 1993-06-14 1994-07-26 Metrologix Precision measurement using particle beam devices
GB2418061B (en) * 2004-09-03 2006-10-18 Zeiss Carl Smt Ltd Scanning particle beam instrument
JP4647977B2 (ja) * 2004-11-30 2011-03-09 日本電子株式会社 Ｆｉｂ自動加工時のドリフト補正方法及び装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229087A (en) * 1961-09-25 1966-01-11 First Pennsylvania Banking And Electron microanalyzer and monitoring system
DE1260519B (de) * 1962-07-03 1968-02-08 C H F Mueller G M B H Medizinische Roentgenfernsehanlage mit einstellbarer Teilbildregelung
NL158344B (nl) * 1968-09-27 1978-10-16 Philips Nv Televisieopneeminrichting met een opneembuis van het fotohalfgeleidertype, alsmede donkerstroomcompensatie-inrichting als onderdeel daarvan.
US3567854A (en) * 1968-10-23 1971-03-02 Gen Electric Automatic brightness control for x-ray image intensifier system
US3612762A (en) * 1969-03-26 1971-10-12 Itt Automatic gain control system for camera tube
US3691302A (en) * 1971-02-25 1972-09-12 Gte Sylvania Inc Automatic light control for low light level television camera
US3670100A (en) * 1971-03-29 1972-06-13 Telemation Automatic reference level set for television cameras
US3812288A (en) * 1972-11-21 1974-05-21 Edax Int Inc Television display system

Also Published As

Publication number Publication date
JPS5712262B2 (enExample) 1982-03-10
JPS4922073A (enExample) 1974-02-27
US3886305A (en) 1975-05-27
JPS5678053A (en) 1981-06-26
JPS5710541B2 (enExample) 1982-02-26
DE2318023A1 (de) 1973-11-08

Similar Documents

Publication Publication Date Title
GB1418393A (en) Automatic contrast and dark level control for scanning electron microscopes
US3379826A (en) Video processing system providing correction for changes in the light source intensity and for light fluctuations due to different page reflectivities
US2437173A (en) Device for discriminating between fixed and moving objects
GB1444109A (en) Apparatus and method for generating x-rays
GB505197A (en) Improvements in or relating to television and like systems
JPH0294345A (ja) 走査電子顕微鏡
GB1435143A (en) Scanning electron microscopes
US3783190A (en) Aperture correction circuit for low light level television camera
US4291338A (en) Automatic exposure control for pulsed active TV systems
US3621132A (en) Flare light compensator in a flying spot scanner
CA1041216A (en) Automatic gain control
US2979622A (en) Thermal image converter
GB1146318A (en) Apparatus for imaging an infrared-radiation field of view
GB1315945A (en) Electron microscopes and microanalysers
GB1429267A (en) Automaitc gain control circuit
FR2274138A1 (fr) Dispositif de commande d'un tube a rayons cathodiques
GB1585063A (en) Display systems
GB1463019A (en) Cathode ray tube birghtness calibrating apparatus
GB1588234A (en) Transmission type beam nicroscopes utilising a scanning technique
US2402444A (en) Control circuit
US3497762A (en) Electron beam recording system and apparatus
JPS54100669A (en) Electron-beam unit
KR830002861Y1 (ko) 주사전자 현미경 및 그의유사장치의 주사상 관찰장치
SU983822A1 (ru) Импульсный корпускул рный микроскоп
JPS54138467A (en) Scanning type electron microscope or resembling apparatus

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee