FR722640A - Method and device for obtaining photographic images using invisible light rays - Google Patents

Method and device for obtaining photographic images using invisible light rays

Info

Publication number
FR722640A
FR722640A FR722640DA FR722640A FR 722640 A FR722640 A FR 722640A FR 722640D A FR722640D A FR 722640DA FR 722640 A FR722640 A FR 722640A
Authority
FR
France
Prior art keywords
light rays
photographic images
invisible light
obtaining photographic
obtaining
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
Other languages
French (fr)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR722640A publication Critical patent/FR722640A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
FR722640D 1930-08-30 1931-08-28 Method and device for obtaining photographic images using invisible light rays Expired FR722640A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL391100X 1930-08-30

Publications (1)

Publication Number Publication Date
FR722640A true FR722640A (en) 1932-03-22

Family

ID=19785789

Family Applications (1)

Application Number Title Priority Date Filing Date
FR722640D Expired FR722640A (en) 1930-08-30 1931-08-28 Method and device for obtaining photographic images using invisible light rays

Country Status (3)

Country Link
DE (1) DE569775C (en)
FR (1) FR722640A (en)
GB (1) GB391100A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971431C (en) * 1934-06-07 1959-01-29 Manfred Von Ardenne Arrangement for increasing the brightness of light-optical images
US2549546A (en) * 1947-10-24 1951-04-17 Albert G Thomas Photographic electrical copying device
FR1008598A (en) * 1948-04-30 1952-05-19 Onera (Off Nat Aerospatiale) Process for the graphic recording or the inscription of materials for the implementation of this process

Also Published As

Publication number Publication date
GB391100A (en) 1933-04-20
DE569775C (en) 1933-02-08

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