JPS5628571A - Television projecting unit - Google Patents

Television projecting unit

Info

Publication number
JPS5628571A
JPS5628571A JP10455179A JP10455179A JPS5628571A JP S5628571 A JPS5628571 A JP S5628571A JP 10455179 A JP10455179 A JP 10455179A JP 10455179 A JP10455179 A JP 10455179A JP S5628571 A JPS5628571 A JP S5628571A
Authority
JP
Japan
Prior art keywords
lens
ray tube
cathode
aplanatic
picture
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.)
Pending
Application number
JP10455179A
Other languages
Japanese (ja)
Inventor
Yasuo Nakajima
Yoshitomi Nagaoka
Yoshito Miyatake
Takashi Nagata
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP10455179A priority Critical patent/JPS5628571A/en
Publication of JPS5628571A publication Critical patent/JPS5628571A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Abstract

PURPOSE:To improve brightness of a projected picture, by filling up a transparent optical bonding material of a high refractive index between the aplanatic lens and the cathode-ray tube in the TV projecting unit which projects the picture of the cathode-ray tube onto the screen by a converging lens. CONSTITUTION:Bonding material 15 consisting of transparent liquid or adhesive having the same refractive index as aplanatic lens 14 is formed between black-and- white or color cathode-ray tube 11 and aplanatic lens 14. The video from lens 14 is projected onto screen 13 by converging lens 2. The aplanatic point of lens 14 is caused to agree with the center of the picture of cathode-ray tube 11, and therefore, distance (d) between the top of lens 14 and cathode-ray tube 11 is d=(1+1/n)r1 when the radius of curvature of lens 14 in the converging lens side and the refractive index are denoted as r1 and n respectively. Thus, the projection length is shortened in comparison with the conventional unit, and the picture near the optical axis can be reproduced faithfully without increment of spherical aberration because aplanatic lens 14 is used.
JP10455179A 1979-08-16 1979-08-16 Television projecting unit Pending JPS5628571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10455179A JPS5628571A (en) 1979-08-16 1979-08-16 Television projecting unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10455179A JPS5628571A (en) 1979-08-16 1979-08-16 Television projecting unit

Publications (1)

Publication Number Publication Date
JPS5628571A true JPS5628571A (en) 1981-03-20

Family

ID=14383601

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10455179A Pending JPS5628571A (en) 1979-08-16 1979-08-16 Television projecting unit

Country Status (1)

Country Link
JP (1) JPS5628571A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6084080A (en) * 1983-10-15 1985-05-13 Hitachi Ltd Projective type receiver
JPS60254890A (en) * 1984-05-30 1985-12-16 Mitsubishi Electric Corp Optical device of projection type television
JPS6195689A (en) * 1984-10-16 1986-05-14 Matsushita Electric Ind Co Ltd Television picture projecting device
US4764806A (en) * 1986-10-27 1988-08-16 Tds Patent Management, Inc. Aplanatic image combiner for use in projection television systems with reduced spherical and coma aberration
US5497268A (en) * 1993-04-14 1996-03-05 Ithaca Research Corporation Hermetically sealed polished optical surface

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6084080A (en) * 1983-10-15 1985-05-13 Hitachi Ltd Projective type receiver
JPS6364115B2 (en) * 1983-10-15 1988-12-09
JPS60254890A (en) * 1984-05-30 1985-12-16 Mitsubishi Electric Corp Optical device of projection type television
JPS6195689A (en) * 1984-10-16 1986-05-14 Matsushita Electric Ind Co Ltd Television picture projecting device
JPH0576834B2 (en) * 1984-10-16 1993-10-25 Matsushita Electric Ind Co Ltd
US4764806A (en) * 1986-10-27 1988-08-16 Tds Patent Management, Inc. Aplanatic image combiner for use in projection television systems with reduced spherical and coma aberration
US5497268A (en) * 1993-04-14 1996-03-05 Ithaca Research Corporation Hermetically sealed polished optical surface

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