FR982911A - Advanced training in lens hoods, especially for observation devices - Google Patents

Advanced training in lens hoods, especially for observation devices

Info

Publication number
FR982911A
FR982911A FR982911DA FR982911A FR 982911 A FR982911 A FR 982911A FR 982911D A FR982911D A FR 982911DA FR 982911 A FR982911 A FR 982911A
Authority
FR
France
Prior art keywords
observation devices
advanced training
lens hoods
hoods
lens
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)
Inventor
Andre-Albert-Charles Bayle
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 filed Critical
Application granted granted Critical
Publication of FR982911A publication Critical patent/FR982911A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G02B2027/0154—Head-up displays characterised by mechanical features with movable elements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR982911D 1943-07-28 1943-07-28 Advanced training in lens hoods, especially for observation devices Expired FR982911A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR982911T 1943-07-28

Publications (1)

Publication Number Publication Date
FR982911A true FR982911A (en) 1951-06-18

Family

ID=9535687

Family Applications (1)

Application Number Title Priority Date Filing Date
FR982911D Expired FR982911A (en) 1943-07-28 1943-07-28 Advanced training in lens hoods, especially for observation devices

Country Status (1)

Country Link
FR (1) FR982911A (en)

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