GB1474847A - Projection lens system - Google Patents

Projection lens system

Info

Publication number
GB1474847A
GB1474847A GB1726775A GB1726775A GB1474847A GB 1474847 A GB1474847 A GB 1474847A GB 1726775 A GB1726775 A GB 1726775A GB 1726775 A GB1726775 A GB 1726775A GB 1474847 A GB1474847 A GB 1474847A
Authority
GB
United Kingdom
Prior art keywords
lens
focal length
elements
main
main 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
GB1726775A
Other languages
English (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.)
Lindaco Ltd
Original Assignee
Lindaco Ltd
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 Lindaco Ltd filed Critical Lindaco Ltd
Publication of GB1474847A publication Critical patent/GB1474847A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only
    • G02B9/14—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only arranged + - +
    • G02B9/16—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only arranged + - + all the components being simple
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Medicines Containing Plant Substances (AREA)
  • External Artificial Organs (AREA)
GB1726775A 1974-05-29 1975-04-25 Projection lens system Expired GB1474847A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7407134A SE382262B (sv) 1974-05-29 1974-05-29 Projektionsoptik.

Publications (1)

Publication Number Publication Date
GB1474847A true GB1474847A (en) 1977-05-25

Family

ID=20321270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1726775A Expired GB1474847A (en) 1974-05-29 1975-04-25 Projection lens system

Country Status (21)

Country Link
JP (1) JPS513228A (sv)
AT (1) AT351828B (sv)
BE (1) BE829494A (sv)
BR (1) BR7503348A (sv)
CA (1) CA1050314A (sv)
CH (1) CH585910A5 (sv)
CS (1) CS192543B2 (sv)
DD (1) DD120942A5 (sv)
DE (1) DE2519991A1 (sv)
DK (1) DK238075A (sv)
ES (1) ES436963A1 (sv)
FI (1) FI751515A (sv)
FR (1) FR2273290B1 (sv)
GB (1) GB1474847A (sv)
HU (1) HU175781B (sv)
IT (1) IT1037780B (sv)
NL (1) NL7506296A (sv)
NO (1) NO139872C (sv)
PL (1) PL104910B1 (sv)
SE (1) SE382262B (sv)
SU (1) SU625640A3 (sv)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4311366A (en) * 1978-03-01 1982-01-19 J. H. Dallmeyer Limited Image focusing system
US4380374A (en) * 1981-04-16 1983-04-19 Minnesota Mining & Manufacturing Company Variable focal length projection lens for use on overhead projectors
JP2691566B2 (ja) * 1988-06-14 1997-12-17 旭光学工業株式会社 拡大投影レンズ
JP2954217B2 (ja) * 1987-12-09 1999-09-27 株式会社日立製作所 投写用レンズ

Also Published As

Publication number Publication date
FR2273290A1 (sv) 1975-12-26
PL104910B1 (pl) 1979-09-29
SU625640A3 (ru) 1978-09-25
CA1050314A (en) 1979-03-13
FR2273290B1 (sv) 1980-07-11
BE829494A (fr) 1975-09-15
JPS513228A (sv) 1976-01-12
NO139872C (no) 1979-05-23
SE7407134L (sv) 1975-12-01
NO139872B (no) 1979-02-12
CH585910A5 (sv) 1977-03-15
NL7506296A (nl) 1975-12-02
ES436963A1 (es) 1976-12-01
DK238075A (da) 1975-11-30
BR7503348A (pt) 1976-04-27
DE2519991A1 (de) 1975-12-18
HU175781B (hu) 1980-10-28
AT351828B (de) 1979-08-10
IT1037780B (it) 1979-11-20
FI751515A (sv) 1975-11-30
CS192543B2 (en) 1979-08-31
AU8129275A (en) 1976-11-25
DD120942A5 (sv) 1976-07-05
ATA398475A (de) 1979-01-15
SE382262B (sv) 1976-01-19
NO751480L (sv) 1975-12-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee