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FR2755252B1 - THE SINGLE BIFOCAL LENS - Google Patents

THE SINGLE BIFOCAL LENS

Info

Publication number
FR2755252B1
FR2755252B1 FR9613557A FR9613557A FR2755252B1 FR 2755252 B1 FR2755252 B1 FR 2755252B1 FR 9613557 A FR9613557 A FR 9613557A FR 9613557 A FR9613557 A FR 9613557A FR 2755252 B1 FR2755252 B1 FR 2755252B1
Authority
FR
France
Prior art keywords
bifocal lens
single bifocal
lens
bifocal
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 - Lifetime
Application number
FR9613557A
Other languages
French (fr)
Other versions
FR2755252A1 (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.)
CHIAPPINI JEAN PIERRE
Original Assignee
CHIAPPINI JEAN PIERRE
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 CHIAPPINI JEAN PIERRE filed Critical CHIAPPINI JEAN PIERRE
Priority to FR9613557A priority Critical patent/FR2755252B1/en
Publication of FR2755252A1 publication Critical patent/FR2755252A1/en
Application granted granted Critical
Publication of FR2755252B1 publication Critical patent/FR2755252B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G02B27/32—Fiducial marks and measuring scales within the optical system
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/10—Bifocal lenses; Multifocal lenses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Telescopes (AREA)
FR9613557A 1996-10-31 1996-10-31 THE SINGLE BIFOCAL LENS Expired - Lifetime FR2755252B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9613557A FR2755252B1 (en) 1996-10-31 1996-10-31 THE SINGLE BIFOCAL LENS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9613557A FR2755252B1 (en) 1996-10-31 1996-10-31 THE SINGLE BIFOCAL LENS

Publications (2)

Publication Number Publication Date
FR2755252A1 FR2755252A1 (en) 1998-04-30
FR2755252B1 true FR2755252B1 (en) 1998-12-18

Family

ID=9497395

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9613557A Expired - Lifetime FR2755252B1 (en) 1996-10-31 1996-10-31 THE SINGLE BIFOCAL LENS

Country Status (1)

Country Link
FR (1) FR2755252B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6104533A (en) * 1998-09-16 2000-08-15 Polaroid Corporation Viewfinder with diffractive optical element
JP2014073526A (en) * 2012-10-05 2014-04-24 Mitsubishi Heavy Ind Ltd Optical system and laser beam machining apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123974A (en) * 1982-07-16 1984-02-08 Pilkington Perkin Elmer Ltd Improvements in or relating to head-up displays
GB2154332A (en) * 1984-01-24 1985-09-04 Robert Kelvin Newton Optical sight
GB2166260B (en) * 1984-10-25 1988-09-01 Schlumberger Electronics Imaging system
FR2608748B1 (en) * 1986-12-19 1993-02-19 France Etat Armement SIGHTING DEVICE FOR FIREARMS
US5283689A (en) * 1991-07-15 1994-02-01 Carlough Warren A Optical sighting device

Also Published As

Publication number Publication date
FR2755252A1 (en) 1998-04-30

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