FR1526526A - Projection lens with progressively variable focal length - Google Patents

Projection lens with progressively variable focal length

Info

Publication number
FR1526526A
FR1526526A FR109645A FR109645A FR1526526A FR 1526526 A FR1526526 A FR 1526526A FR 109645 A FR109645 A FR 109645A FR 109645 A FR109645 A FR 109645A FR 1526526 A FR1526526 A FR 1526526A
Authority
FR
France
Prior art keywords
focal length
projection lens
variable focal
progressively variable
progressively
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
FR109645A
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.)
Meopta np
Original Assignee
Meopta np
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 Meopta np filed Critical Meopta np
Priority to FR109645A priority Critical patent/FR1526526A/en
Application granted granted Critical
Publication of FR1526526A publication Critical patent/FR1526526A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/143—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only
    • G02B15/1435—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative
    • G02B15/143507—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative arranged -++
FR109645A 1966-06-14 1967-06-08 Projection lens with progressively variable focal length Expired FR1526526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR109645A FR1526526A (en) 1966-06-14 1967-06-08 Projection lens with progressively variable focal length

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS400366 1966-06-14
FR109645A FR1526526A (en) 1966-06-14 1967-06-08 Projection lens with progressively variable focal length

Publications (1)

Publication Number Publication Date
FR1526526A true FR1526526A (en) 1968-05-24

Family

ID=25745929

Family Applications (1)

Application Number Title Priority Date Filing Date
FR109645A Expired FR1526526A (en) 1966-06-14 1967-06-08 Projection lens with progressively variable focal length

Country Status (1)

Country Link
FR (1) FR1526526A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3609006A (en) * 1968-07-12 1971-09-28 Meopta Narodni Podnik Zoom projection lens system having a moveable positive component

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3609006A (en) * 1968-07-12 1971-09-28 Meopta Narodni Podnik Zoom projection lens system having a moveable positive component

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