Title:
LIGHT SOURCE FOR PROJECTOR, AND PROJECTOR
Document Type and Number:
Japanese Patent JP2004093653
Kind Code:
A
Abstract:
To provide a light source for a projector capable of easily miniaturizing the projector without lowering theavailability of light.
The light source for the projector having a lamp and a reflector for emitting radiated light from the lamp from an emitting aperture part has an optical element for refracting the radiated light from the lamp in a reverse direction to the emitting direction of the reflector around the lamp. It is desirable to use a cylindrical prism or a cylindrical lens as the optical element. By such constitution, it is possible to make NA which is required for a relay optical system for illumination and a projection lens small, so that the projector is easily miniaturized.
Inventors:
ARIGA SUSUMU
Application Number:
JP2002251302A
Publication Date:
March 25, 2004
Filing Date:
August 29, 2002
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
G02F1/13357; G03B21/14; (IPC1-7): G03B21/14; G02F1/13357
Attorney, Agent or Firm:
Masahiko Ueyanagi
Fujitsuna Hideyoshi
Osamu Suzawa
Fujitsuna Hideyoshi
Osamu Suzawa