JPS5541457A - Lighting optical system of printer device - Google Patents

Lighting optical system of printer device

Info

Publication number
JPS5541457A
JPS5541457A JP11536578A JP11536578A JPS5541457A JP S5541457 A JPS5541457 A JP S5541457A JP 11536578 A JP11536578 A JP 11536578A JP 11536578 A JP11536578 A JP 11536578A JP S5541457 A JPS5541457 A JP S5541457A
Authority
JP
Japan
Prior art keywords
lighting
condenser
optical axis
region
projecting 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.)
Granted
Application number
JP11536578A
Other languages
Japanese (ja)
Other versions
JPS6024453B2 (en
Inventor
Hisashi Yamada
Takamasa Sawada
Takao Toda
Masaaki Yanagi
Yoshiaki Sone
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 JP11536578A priority Critical patent/JPS6024453B2/en
Publication of JPS5541457A publication Critical patent/JPS5541457A/en
Publication of JPS6024453B2 publication Critical patent/JPS6024453B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Projection-Type Copiers In General (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)

Abstract

PURPOSE: To decrease the diameter and thickness of a condenser as well as a light source for lighting and make possible original lighting of good efficiency by deviating the optical axis of the lighting area of the lighting optical system with respect to the optical axis of a projecting lens and narrowing the lighting region of the original part.
CONSTITUTION: In a Kohler's illumination method used at plural magnifications, the image of the filament 1a of a light source lamp 1 is formed as an image 11 to the pupil 10 of the film 3 side of a projecting lens 4 by a condenser 2. The effective image plane of the film 3 changes to a, b regions depending upon the variable magnifications thereof. Lighting the e region here makes possible lighting the a, b regions, thus reducing the lighting regions. Namely, the axis parallel to x1 at the center of the e area is let to be x2 and the optical axis of the condenser on the film side is let to be x3. Then, the luminous flux for lighting the abovementioned e region becomes maximum f region and the x2 being the central axis of the lighting region deviates with respect to the x1 being the optical axis of the projecting lens. Since the optical axis x3 of the condenser is disposed with a deviation as well, the outside diameter and central thickness of the condenser may be reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP11536578A 1978-09-19 1978-09-19 printer device Expired JPS6024453B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11536578A JPS6024453B2 (en) 1978-09-19 1978-09-19 printer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11536578A JPS6024453B2 (en) 1978-09-19 1978-09-19 printer device

Publications (2)

Publication Number Publication Date
JPS5541457A true JPS5541457A (en) 1980-03-24
JPS6024453B2 JPS6024453B2 (en) 1985-06-13

Family

ID=14660714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11536578A Expired JPS6024453B2 (en) 1978-09-19 1978-09-19 printer device

Country Status (1)

Country Link
JP (1) JPS6024453B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0329936A (en) * 1989-06-27 1991-02-07 Seiko Instr Inc Image projecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0329936A (en) * 1989-06-27 1991-02-07 Seiko Instr Inc Image projecting device

Also Published As

Publication number Publication date
JPS6024453B2 (en) 1985-06-13

Similar Documents

Publication Publication Date Title
JPS5282246A (en) Light source device
JPS5459951A (en) Transmission lighting device for microscopes
JPS56142509A (en) Lighting device of microscope
JPS57208523A (en) Telecentric variable magnification lighting system
JPS559549A (en) Projector
JPS5541457A (en) Lighting optical system of printer device
JPS57111508A (en) Lighting optical system of microscope for surgical operation
JPS51137413A (en) Ophthalmofundoscopic camera having fixed viewing lamp
JPS6435912A (en) Projection aligner
JPS57148718A (en) Illumination system of optical device
JPS54111218A (en) Image pickup unit
JPS55135871A (en) Original platen lighting device
JPS5560934A (en) Color band removing focus adjusting method in overhead projector
JPS5315144A (en) Exposure device for variable magnification type electrophotographic copier
JPS52100775A (en) Fluorescent lamp
JPS54133140A (en) Photoreceptor exposure adjusting method in copying machine
JPS6437837A (en) Semiconductor exposure device
JPS5785019A (en) Lighting device
SU654924A1 (en) Device for uniform illumination of an object
JPS5646263A (en) Original lighting device of electronic copying machine
JPS54147034A (en) Lighting device of copying machine also serving telephotograph
JPS5768877A (en) Lighting device of copying machine
JPS53106118A (en) Lens iris for optical system
JPS5681864A (en) Compensating device for uneven illuminance
JPS5383621A (en) Control mechanism for intensity of illumination on the focal plane