CA2027515C - Methode de mesure pre-eclair - Google Patents

Methode de mesure pre-eclair Download PDF

Info

Publication number: CA2027515C
Authority: CA; Canada
Prior art keywords: scene; light; subject; light source; time
Prior art date: 1990-10-12
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 - Fee Related

Application number

CA 2027515

Other languages

English (en)

Other versions

CA2027515A1 (fr

Inventor

Judith Neely Coltman

John P. Gaewsky

Jeffrey T. Gray

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.)

Polaroid Corp

Original Assignee

Polaroid 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.)

1990-10-12

Filing date

1990-10-12

Publication date

2000-07-25

1990-10-12 Application filed by Polaroid Corp filed Critical Polaroid Corp

1990-10-12 Priority to CA 2027515 priority Critical patent/CA2027515C/fr

1992-04-13 Publication of CA2027515A1 publication Critical patent/CA2027515A1/fr

2000-07-25 Application granted granted Critical

2000-07-25 Publication of CA2027515C publication Critical patent/CA2027515C/fr

2010-10-12 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Links

238000000691 measurement method Methods 0.000 title description 4
238000002310 reflectometry Methods 0.000 claims abstract description 50
230000010354 integration Effects 0.000 claims description 21
230000004913 activation Effects 0.000 claims description 12
238000000034 method Methods 0.000 claims description 9
238000010304 firing Methods 0.000 abstract description 3
238000005265 energy consumption Methods 0.000 abstract description 2
230000007246 mechanism Effects 0.000 description 21
239000003990 capacitor Substances 0.000 description 15
230000006870 function Effects 0.000 description 8
230000000977 initiatory effect Effects 0.000 description 7
230000005540 biological transmission Effects 0.000 description 5
230000004044 response Effects 0.000 description 4
230000008901 benefit Effects 0.000 description 3
230000000903 blocking effect Effects 0.000 description 3
230000001960 triggered effect Effects 0.000 description 3
238000005286 illumination Methods 0.000 description 2
239000007788 liquid Substances 0.000 description 2
238000010791 quenching Methods 0.000 description 2
230000011514 reflex Effects 0.000 description 2
241000543381 Cliftonia monophylla Species 0.000 description 1
ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
230000001419 dependent effect Effects 0.000 description 1
238000010586 diagram Methods 0.000 description 1
238000006073 displacement reaction Methods 0.000 description 1
AVCKMGVFKDWJML-UHFFFAOYSA-M lithium;2,6-ditert-butyl-4-methylphenolate Chemical compound [Li+].CC1=CC(C(C)(C)C)=C([O-])C(C(C)(C)C)=C1 AVCKMGVFKDWJML-UHFFFAOYSA-M 0.000 description 1
230000004048 modification Effects 0.000 description 1
238000012986 modification Methods 0.000 description 1
230000003287 optical effect Effects 0.000 description 1
230000008569 process Effects 0.000 description 1
230000000750 progressive effect Effects 0.000 description 1
230000009467 reduction Effects 0.000 description 1
230000036962 time dependent Effects 0.000 description 1

Landscapes

Stroboscope Apparatuses (AREA)
Exposure Control For Cameras (AREA)

CA 2027515 1990-10-12 1990-10-12 Methode de mesure pre-eclair Expired - Fee Related CA2027515C (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
CA 2027515 CA2027515C (fr)	1990-10-12	1990-10-12	Methode de mesure pre-eclair

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA 2027515 CA2027515C (fr)	1990-10-12	1990-10-12	Methode de mesure pre-eclair

Publications (2)

Publication Number	Publication Date
CA2027515A1 CA2027515A1 (fr)	1992-04-13
CA2027515C true CA2027515C (fr)	2000-07-25

Family

ID=4146148

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA 2027515 Expired - Fee Related CA2027515C (fr)	1990-10-12	1990-10-12	Methode de mesure pre-eclair

Country Status (1)

Country	Link
CA (1)	CA2027515C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN112346110A (zh) *	2020-10-30	2021-02-09	中国核工业第五建设有限公司	一种用于自动射线检测系统的手写标识预曝光暗盒

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US11294054B2 (en) *	2019-10-11	2022-04-05	Dell Products L.P.	Information handling system infrared proximity detection with ambient light management
US11662695B2 (en)	2019-10-11	2023-05-30	Dell Products L.P.	Information handling system infrared proximity detection with distance reduction detection
US11435447B2 (en)	2019-10-11	2022-09-06	Dell Products L.P.	Information handling system proximity sensor with mechanically adjusted field of view
US11435475B2 (en)	2019-10-11	2022-09-06	Dell Products L.P.	Information handling system infrared proximity detection with frequency domain modulation
US11663343B2 (en)	2020-01-31	2023-05-30	Dell Products L.P.	Information handling system adaptive user presence detection
US11334146B2 (en)	2020-01-31	2022-05-17	Dell Products L.P.	Information handling system peripheral enhanced user presence detection
US11513813B2 (en)	2020-01-31	2022-11-29	Dell Products L.P.	Information handling system notification presentation based upon user presence detection

1990
- 1990-10-12 CA CA 2027515 patent/CA2027515C/fr not_active Expired - Fee Related

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN112346110A (zh) *	2020-10-30	2021-02-09	中国核工业第五建设有限公司	一种用于自动射线检测系统的手写标识预曝光暗盒

Also Published As

Publication number	Publication date
CA2027515A1 (fr)	1992-04-13

Similar Documents

Publication	Publication Date	Title
US4192587A (en)	1980-03-11	Proportional fill flash
CA2028640C (fr)	2001-01-16	Appareil de compensation des variations dans la vitesse d'obturation et methode connexe
US4357083A (en)	1982-11-02	Method and apparatus using weighted range signal for controlling photographic functions
US4998128A (en)	1991-03-05	Preflash measurement technique
CA2027515C (fr)	2000-07-25	Methode de mesure pre-eclair
US5159381A (en)	1992-10-27	Electronic flash control circuit
CA1169689A (fr)	1984-06-26	Flash d'eclairage d'appoint proportionnel variable sur toute l'etendue de la gamme
US4887118A (en)	1989-12-12	Electronic flash camera having reduced cycle time
US4894678A (en)	1990-01-16	Preflash pseudofocus/exposure control system
US4972217A (en)	1990-11-20	Shutter mechanism drive having reduced mechanical noise
CA1135551A (fr)	1982-11-16	Appareil photo a dispositif automatique de telemetrie, de focalisation et de declenchement du flash
US4317622A (en)	1982-03-02	Exposure control apparatus for flash photography
CA2029474C (fr)	2001-01-30	Flash electronique reduisant la fermeture des paupieres des personnes durant l'exposition
US4464039A (en)	1984-08-07	Charge completion detecting device for flash photography system
US4978991A (en)	1990-12-18	Open-loop stepper motor controlled shutter
CA1208061A (fr)	1986-07-22	Appareil hydride de prise de vues
US5189464A (en)	1993-02-23	Supplemental lens positioning system for a fixed focus lens camera
US4243309A (en)	1981-01-06	Walking beam latch and lens disc actuator arrangement
US5117252A (en)	1992-05-26	Electronic flash control system for use in a fixed focus lens camera for increasing depth of field by the timing of flash actuation
US5124739A (en)	1992-06-23	Real time pseudofocus exposure control system
CA1208060A (fr)	1986-07-22	Appareil hydride de prise de vues
US4641943A (en)	1987-02-10	Photographic camera with electronic flash having periodically disabled charging apparatus
JP2989658B2 (ja)	1999-12-13	自動露出決定方法及び装置並びにこれを用いたカメラ
US4290683A (en)	1981-09-22	Sonar responsive shutter blade time out control circuit
US4255031A (en)	1981-03-10	Photographic camera with dual purpose light indicator

Legal Events

Date	Code	Title	Description
1997-05-27	EEER	Examination request
2001-12-12	MKLA	Lapsed