JPS58198017A - 投影レンズ - Google Patents

投影レンズ

Info

Publication number
JPS58198017A
JPS58198017A JP8227882A JP8227882A JPS58198017A JP S58198017 A JPS58198017 A JP S58198017A JP 8227882 A JP8227882 A JP 8227882A JP 8227882 A JP8227882 A JP 8227882A JP S58198017 A JPS58198017 A JP S58198017A
Authority
JP
Japan
Prior art keywords
lens
convex
lenses
projection
mirror
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.)
Granted
Application number
JP8227882A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0548449B2 (enrdf_load_stackoverflow
Inventor
Kyohei Fukuda
京平 福田
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8227882A priority Critical patent/JPS58198017A/ja
Priority to US06/494,447 priority patent/US4620773A/en
Publication of JPS58198017A publication Critical patent/JPS58198017A/ja
Publication of JPH0548449B2 publication Critical patent/JPH0548449B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7408—Direct viewing projectors, e.g. an image displayed on a video CRT or LCD display being projected on a screen

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Lenses (AREA)
JP8227882A 1982-05-15 1982-05-15 投影レンズ Granted JPS58198017A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP8227882A JPS58198017A (ja) 1982-05-15 1982-05-15 投影レンズ
US06/494,447 US4620773A (en) 1982-05-15 1983-05-13 Projection lens for projection television

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8227882A JPS58198017A (ja) 1982-05-15 1982-05-15 投影レンズ

Publications (2)

Publication Number Publication Date
JPS58198017A true JPS58198017A (ja) 1983-11-17
JPH0548449B2 JPH0548449B2 (enrdf_load_stackoverflow) 1993-07-21

Family

ID=13770030

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8227882A Granted JPS58198017A (ja) 1982-05-15 1982-05-15 投影レンズ

Country Status (1)

Country Link
JP (1) JPS58198017A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6073514A (ja) * 1983-09-30 1985-04-25 Hitachi Ltd プロジェクションテレビ用レンズ
JPS60220306A (ja) * 1984-04-18 1985-11-05 Konishiroku Photo Ind Co Ltd テレビプロジエクタ−用投影レンズ
JPS619613A (ja) * 1984-06-25 1986-01-17 Canon Inc 投影レンズ
JPS6271915A (ja) * 1985-09-25 1987-04-02 Hitachi Ltd 投写形テレビ用光学系
US4704009A (en) * 1984-12-05 1987-11-03 Matsushita Electric Industrial Co., Ltd. Projection lens
US4733953A (en) * 1985-02-06 1988-03-29 Matsushita Electric Industrial Co., Ltd. Color corrected projection lens
JPH02250015A (ja) * 1989-03-23 1990-10-05 Matsushita Electric Ind Co Ltd 投写レンズとその投写レンズを用いた投写型表示装置
KR100317025B1 (ko) * 1999-04-19 2001-12-22 구자홍 키스톤을 이용한 박형 프로젝션 텔레비젼 시스템

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4995533A (enrdf_load_stackoverflow) * 1972-10-20 1974-09-10
JPS5734515A (en) * 1980-08-09 1982-02-24 Minolta Camera Co Ltd Refracting index type optical system for video projector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4995533A (enrdf_load_stackoverflow) * 1972-10-20 1974-09-10
JPS5734515A (en) * 1980-08-09 1982-02-24 Minolta Camera Co Ltd Refracting index type optical system for video projector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6073514A (ja) * 1983-09-30 1985-04-25 Hitachi Ltd プロジェクションテレビ用レンズ
JPS60220306A (ja) * 1984-04-18 1985-11-05 Konishiroku Photo Ind Co Ltd テレビプロジエクタ−用投影レンズ
JPS619613A (ja) * 1984-06-25 1986-01-17 Canon Inc 投影レンズ
US4704009A (en) * 1984-12-05 1987-11-03 Matsushita Electric Industrial Co., Ltd. Projection lens
US4733953A (en) * 1985-02-06 1988-03-29 Matsushita Electric Industrial Co., Ltd. Color corrected projection lens
JPS6271915A (ja) * 1985-09-25 1987-04-02 Hitachi Ltd 投写形テレビ用光学系
JPH02250015A (ja) * 1989-03-23 1990-10-05 Matsushita Electric Ind Co Ltd 投写レンズとその投写レンズを用いた投写型表示装置
KR100317025B1 (ko) * 1999-04-19 2001-12-22 구자홍 키스톤을 이용한 박형 프로젝션 텔레비젼 시스템

Also Published As

Publication number Publication date
JPH0548449B2 (enrdf_load_stackoverflow) 1993-07-21

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