JPS5583020A - Projector - Google Patents

Projector

Info

Publication number
JPS5583020A
JPS5583020A JP15728578A JP15728578A JPS5583020A JP S5583020 A JPS5583020 A JP S5583020A JP 15728578 A JP15728578 A JP 15728578A JP 15728578 A JP15728578 A JP 15728578A JP S5583020 A JPS5583020 A JP S5583020A
Authority
JP
Japan
Prior art keywords
lens
lenses
forming
projection
face
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
JP15728578A
Other languages
Japanese (ja)
Inventor
Mitsuhiro Midorikawa
Atsuo Tsunoda
Hidetoshi Murase
Noritaka Mochizuki
Setsuo Minami
Yoshiya Matsui
Masazumi Moriwaki
Mikio Suzuta
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP15728578A priority Critical patent/JPS5583020A/en
Publication of JPS5583020A publication Critical patent/JPS5583020A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE: To achieve the improvement in brightness of projected images by making the distance berween each lens of the two lens blocks constituting the projection optical system constant at the holding portions and forming each lens at the specified size.
CONSTITUTION: The light images from the object face D are formed on the projection face P through lens blocks 81, 82. Here, land portions 83, 84 for forming a mask 85 between the plural lenses of each block are provided, so that the spacing between each lens is maintained constant. In addition, the length along the respective optical axes of the two lenses in a coaxial relation is made 2W60 times the effective diameter of the lenses.
COPYRIGHT: (C)1980,JPO&Japio
JP15728578A 1978-12-18 1978-12-18 Projector Pending JPS5583020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15728578A JPS5583020A (en) 1978-12-18 1978-12-18 Projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15728578A JPS5583020A (en) 1978-12-18 1978-12-18 Projector

Publications (1)

Publication Number Publication Date
JPS5583020A true JPS5583020A (en) 1980-06-23

Family

ID=15646314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15728578A Pending JPS5583020A (en) 1978-12-18 1978-12-18 Projector

Country Status (1)

Country Link
JP (1) JPS5583020A (en)

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