JPS6480936A - Light source for projection type display device - Google Patents

Light source for projection type display device

Info

Publication number
JPS6480936A
JPS6480936A JP62239654A JP23965487A JPS6480936A JP S6480936 A JPS6480936 A JP S6480936A JP 62239654 A JP62239654 A JP 62239654A JP 23965487 A JP23965487 A JP 23965487A JP S6480936 A JPS6480936 A JP S6480936A
Authority
JP
Japan
Prior art keywords
lens
lamp
ultraviolet rays
spherical reflecting
infrared
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
JP62239654A
Other languages
Japanese (ja)
Inventor
Junichiro Shinozaki
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP62239654A priority Critical patent/JPS6480936A/en
Publication of JPS6480936A publication Critical patent/JPS6480936A/en
Pending legal-status Critical Current

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  • Projection Apparatus (AREA)

Abstract

PURPOSE:To recover scattered light and save electric power by arranging a lens which has a reflecting film of a dichroic layer for infrared and/or ultraviolet rays at a projection opening while covering the almost entire three- dimensional having its center almost at a lamp with plural spherical reflecting mirrors. CONSTITUTION:The entire three-dimensional angle of the lamp 3 is covered with an inside spherical reflecting mirror 1 and an outside spherical reflecting mirror 2 which have their center at the lamp 3 and differ in radius, and they are so arranged that the lens 5 collimates a projection light beam from a window as part of the outside spherical reflecting mirror 2 into a parallel light beam. The dichroic coating layer 4 which reflects infrared and ultraviolet rays is formed on the surface of the lens 5. Namely, no light leaks except from the window where the lens 5 is fitted, so the lens projects only visible light and the infrared and ultraviolet rays are returned to the lamp. Consequently, the scattered light energy can be confined and used again to save the energy.
JP62239654A 1987-09-24 1987-09-24 Light source for projection type display device Pending JPS6480936A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62239654A JPS6480936A (en) 1987-09-24 1987-09-24 Light source for projection type display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62239654A JPS6480936A (en) 1987-09-24 1987-09-24 Light source for projection type display device

Publications (1)

Publication Number Publication Date
JPS6480936A true JPS6480936A (en) 1989-03-27

Family

ID=17047917

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62239654A Pending JPS6480936A (en) 1987-09-24 1987-09-24 Light source for projection type display device

Country Status (1)

Country Link
JP (1) JPS6480936A (en)

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